ci: retry build (transient BuildKit infrastructure error)

PreviewVideoPanel 的 displayTitle.split("/") 改为正则 split(/[/／]/)，
与 useCanvasPlayer.ts 保持一致，中文输入法下的全角斜杠也能触发换行。

alembic/versions/057_add_title_config_to_generation_tasks.py

@@ -0,0 +1,26 @@
+"""Add title_config to generation_tasks
+
+Revision ID: 057_title_config
+Revises: 056_fix_cover_templates_config
+Create Date: 2026-08-23
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "057_title_config"
+down_revision = "056_fix_cover_templates_config"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "generation_tasks",
+        sa.Column("title_config", sa.JSON(), nullable=False, server_default="{}"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("generation_tasks", "title_config")

apps/api/app/api/routes/generation_cover.py

@@ -31,8 +31,6 @@ logger = logging.getLogger(__name__)
 router = APIRouter(tags=["Generation"])
 
 
-
-
 # ── Schemas ──────────────────────────────────────────────────────────────
 
 
@@ -65,6 +63,83 @@ class GenerateCoverResponse(BaseModel):
 # ── Route ────────────────────────────────────────────────────────────────
 
 
+def _persist_cover_frame(
+    frame_url: str,
+    plan_id: str,
+    title_text: str = "",
+    *,
+    title_color: str = "#ffffff",
+    title_position: str = "bottom",
+    title_font_size: int | None = None,
+) -> str:
+    """下载 MediaKit 返回的临时帧图，可选叠加标题后转存到 OSS covers/ 路径。
+
+    Args:
+        frame_url: MediaKit 返回的临时帧图 URL
+        plan_id: 剪辑计划 ID（生成 OSS key）
+        title_text: 非空时用 Pillow 在帧上叠加标题（用于 E2 从源素材抽帧，
+            因为源素材本身没有烧录标题）
+        title_color: 标题字体颜色（#RRGGBB）
+        title_position: 标题位置 top/center/bottom
+        title_font_size: 标题字号，None 时自动计算
+    """
+    import tempfile
+    import uuid
+    from pathlib import Path
+
+    tmp_path: str | None = None
+    try:
+        import httpx
+
+        resp = httpx.get(frame_url, timeout=30, follow_redirects=True)
+        resp.raise_for_status()
+        if not resp.content:
+            return frame_url
+
+        with tempfile.NamedTemporaryFile(suffix=".jpg", delete=False) as tmp:
+            tmp.write(resp.content)
+            tmp_path = tmp.name
+
+        # E2 从源素材抽帧时，源素材无标题，叠加标题文字
+        if title_text and title_text.strip():
+            try:
+                from packages.shared.title_overlay import apply_title_to_image
+
+                applied = apply_title_to_image(
+                    tmp_path,
+                    title_text,
+                    color=title_color,
+                    position=title_position,
+                    font_size=title_font_size,
+                )
+                if applied:
+                    logger.info("[封面生成] E2 帧图已叠加标题: plan_id=%s", plan_id)
+            except Exception:
+                logger.warning(
+                    "[封面生成] E2 标题叠加失败（返回无标题帧）: plan_id=%s",
+                    plan_id,
+                    exc_info=True,
+                )
+
+        from packages.shared.storage import get_shared_storage_service
+
+        storage = get_shared_storage_service()
+        cover_key = f"covers/{plan_id}/cover_{uuid.uuid4().hex[:8]}.jpg"
+        storage.upload_file(
+            file_or_path=tmp_path,
+            storage_key=cover_key,
+            content_type="image/jpeg",
+        )
+        public_url = storage.get_url(cover_key)
+        return public_url or frame_url
+    except Exception:
+        logger.warning("封面帧转存失败，返回原始 URL: plan_id=%s", plan_id, exc_info=True)
+        return frame_url
+    finally:
+        if tmp_path:
+            Path(tmp_path).unlink(missing_ok=True)
+
+
 @router.post("/generate-cover", response_model=GenerateCoverResponse)
 def generate_cover(
     body: GenerateCoverRequest,
@@ -198,44 +273,31 @@ def generate_cover(
                 exc_info=True,
             )
 
-    # 仍然找不到才报 400
+    # 使用裸 URL（rendered/* 已配置公开读）；找不到渲染视频时不立即报错，
-    if not rendered_storage_key:
+    # 因为步骤 E 可以直接从源素材抽帧（历史数据或 Worker 抽帧失败时的兜底）
-        logger.error("[封面生成] ❌ 找不到预览视频: plan_id=%s", plan_id)
-        raise HTTPException(
-            status_code=400,
-            detail="请先生成预览视频，再生成封面",
-        )
-
-    # 回写到 plan.config
-    plan_svc.update_plan_config(plan_id, {"rendered_storage_key": rendered_storage_key})
-
-    # 使用裸 URL（rendered/* 已配置公开读）
     primary_video_url = None
-    try:
+    if rendered_storage_key:
-        if rendered_storage_key.startswith("http"):
+        plan_svc.update_plan_config(plan_id, {"rendered_storage_key": rendered_storage_key})
-            primary_video_url = rendered_storage_key
+        try:
-        else:
+            if rendered_storage_key.startswith("http"):
-            from packages.shared.storage import get_shared_storage_service
+                primary_video_url = rendered_storage_key
+            else:
+                from packages.shared.storage import get_shared_storage_service
 
-            storage_svc = get_shared_storage_service()
+                storage_svc = get_shared_storage_service()
-            primary_video_url = storage_svc.get_url(rendered_storage_key)
+                primary_video_url = storage_svc.get_url(rendered_storage_key)
-        # 防御性规范化：合并路径中的双斜杠（// -> /），但保留协议头的 ://
+            if primary_video_url:
-        # 历史数据中 project_id 为空时会产生 projects//tasks/ 路径，
+                import re as _re
-        # MediaKit 的 HTTP 客户端会规范化 URL 导致 404
-        if primary_video_url:
-            import re as _re
 
-            primary_video_url = _re.sub(r"(?<!:)//", "/", primary_video_url)
+                primary_video_url = _re.sub(r"(?<!:)//", "/", primary_video_url)
-        logger.info(
+            logger.info(
-            "获取预览视频URL用于封面生成: plan_id=%s url=%s",
+                "获取预览视频URL用于封面生成: plan_id=%s url=%s",
-            plan_id,
+                plan_id,
-            primary_video_url[:80] if primary_video_url else "",
+                primary_video_url[:80] if primary_video_url else "",
-        )
+            )
-    except Exception as e:
+        except Exception as e:
-        raise HTTPException(
+            logger.warning("获取预览视频URL失败: plan_id=%s err=%s", plan_id, e)
-            status_code=500,
+            primary_video_url = None
-            detail=f"获取预览视频URL失败: {e}",
-        ) from e
 
     # 统一封面管道：优先从 GenerationTask.cover_url 读取渲染后视频抽帧的封面
     # 多步查找 cover_url，和查找视频 URL 一样的 fallback 逻辑
@@ -310,6 +372,129 @@ def generate_cover(
                     exc_info=True,
                 )
 
+        # 步骤 D：从 plan.config.cover_candidates 读取（Worker 渲染时写入）
+        if not cover_url_from_task:
+            _candidates = (plan.config or {}).get("cover_candidates") or []
+            if isinstance(_candidates, list) and _candidates:
+                _first = _candidates[0]
+                if isinstance(_first, dict):
+                    cover_url_from_task = _first.get("image_url") or _first.get("url") or ""
+                    if cover_url_from_task:
+                        logger.info(
+                            "[封面生成] 统一管道封面(步骤D-cover_candidates): plan_id=%s url=%s",
+                            plan_id,
+                            cover_url_from_task[:80],
+                        )
+
+        # 步骤 E1：如果有已渲染的预览视频 URL 但 cover_url 未持久化（历史数据），
+        # 直接从渲染视频抽帧
+        if not cover_url_from_task and primary_video_url:
+            try:
+                from packages.shared.mediakit_client import get_mediakit_client
+
+                mk_client = get_mediakit_client()
+                if mk_client.is_available:
+                    logger.info(
+                        "[封面生成] 步骤E1-从渲染视频抽帧: plan_id=%s url=%s",
+                        plan_id,
+                        primary_video_url[:80],
+                    )
+                    snapshots = mk_client.extract_frames(
+                        video_url=primary_video_url,
+                        strategy="SpecifiedFrames",
+                        max_frames=1,
+                        poll_interval=2.0,
+                        max_poll_attempts=5,
+                        max_retries=0,
+                    )
+                    if snapshots:
+                        raw = snapshots[0].get("image_url") or snapshots[0].get("url") or ""
+                        if raw:
+                            cover_url_from_task = _persist_cover_frame(raw, plan_id)
+                            logger.info(
+                                "[封面生成] 统一管道封面(步骤E1-rendered-video): plan_id=%s url=%s",
+                                plan_id,
+                                cover_url_from_task[:80],
+                            )
+            except Exception:
+                logger.warning(
+                    "[封面生成] 步骤E1从渲染视频抽帧失败: plan_id=%s",
+                    plan_id,
+                    exc_info=True,
+                )
+
+        # 步骤 E2：当 A/B/C/D/E1 均未命中（如历史预览任务无 cover_url）时，
+        # 直接从用户选择的第一个视频素材中抽取封面帧作为兜底。API 请求内短超时，不阻塞。
+        if not cover_url_from_task and body.asset_ids:
+            from packages.adapters.sqlalchemy_impl.asset_repository import (
+                SQLAlchemyAssetRepository,
+            )
+            from packages.shared.mediakit_client import get_mediakit_client
+            from packages.shared.storage import get_shared_storage_service
+
+            asset_repo = SQLAlchemyAssetRepository(db)
+            storage_svc = get_shared_storage_service()
+            mk_client = get_mediakit_client()
+            # 从 plan.config 读取完整标题样式，E2 从源素材抽帧时叠加（源素材本身无标题）
+            _e2_title_cfg = (plan.config or {}).get("title", {}) or {}
+            if not isinstance(_e2_title_cfg, dict):
+                _e2_title_cfg = {}
+            _e2_title_text = (_e2_title_cfg.get("text", "") or "").strip() if _e2_title_cfg.get("enabled", True) else ""
+            # 读取标题样式：前端可能传 color 或 font_color，都兼容
+            _e2_title_color = _e2_title_cfg.get("color") or _e2_title_cfg.get("font_color") or "#ffffff"
+            _e2_title_position = _e2_title_cfg.get("position", "bottom") or "bottom"
+            _e2_title_font_size = _e2_title_cfg.get("font_size") or _e2_title_cfg.get("size")
+            if mk_client.is_available:
+                for aid in body.asset_ids:
+                    try:
+                        asset = asset_repo.get(aid)
+                        if not asset or asset.file_type != "video":
+                            continue
+                        sk = asset.storage_key or ""
+                        if not sk:
+                            continue
+                        src_url = sk if sk.startswith("http") else storage_svc.get_url(sk)
+                        if not src_url:
+                            continue
+                        logger.info(
+                            "[封面生成] 步骤E-从素材抽帧: plan_id=%s asset_id=%s url=%s",
+                            plan_id,
+                            aid,
+                            src_url[:80],
+                        )
+                        snapshots = mk_client.extract_frames(
+                            video_url=src_url,
+                            strategy="SpecifiedFrames",
+                            max_frames=1,
+                            poll_interval=2.0,
+                            max_poll_attempts=5,
+                            max_retries=0,
+                        )
+                        if snapshots:
+                            raw = snapshots[0].get("image_url") or snapshots[0].get("url") or ""
+                            if raw:
+                                cover_url_from_task = _persist_cover_frame(
+                                    raw,
+                                    plan_id,
+                                    title_text=_e2_title_text,
+                                    title_color=_e2_title_color,
+                                    title_position=_e2_title_position,
+                                    title_font_size=_e2_title_font_size,
+                                )
+                                logger.info(
+                                    "[封面生成] 统一管道封面(步骤E-source-asset): plan_id=%s url=%s",
+                                    plan_id,
+                                    cover_url_from_task[:80],
+                                )
+                                break
+                    except Exception:
+                        logger.warning(
+                            "[封面生成] 步骤E从素材抽帧失败: plan_id=%s asset_id=%s",
+                            plan_id,
+                            aid,
+                            exc_info=True,
+                        )
+
         if cover_url_from_task:
             # 标题已在预览视频渲染时烧录（ASS字幕），封面帧自然包含标题
             cover_data = {
@@ -325,13 +510,13 @@ def generate_cover(
             return GenerateCoverResponse(plan_id=plan_id, cover=cover_data)
 
         logger.warning(
-            "[封面生成] 统一管道未找到 cover_url: plan_id=%s",
+            "[封面生成] 统一管道未找到 cover_url (A/B/C/D均未命中): plan_id=%s",
             plan_id,
         )
         # ai_frame/ai_regenerate 类型必须从渲染管道获取，不再回退到 AI 服务
         raise HTTPException(
             status_code=400,
-            detail="封面尚未生成，请先重新生成预览视频以触发封面自动提取",
+            detail="封面生成失败：未找到可抽帧的视频素材，请确认已上传视频素材后重试",
         )
 
     from packages.shared.ai_service import run_generate_cover

apps/api/app/api/routes/generation_preview.py

@@ -5,7 +5,6 @@
 
 from __future__ import annotations
 
-import json
 import logging
 
 from app.auth import AuthenticatedUser, get_current_user
@@ -265,22 +264,38 @@ def create_preview_generation_task(
     if not video_ratio and request.template_id:
         video_ratio = _infer_video_ratio_from_template(request.template_id, db, user_id)
 
+    # 根据 video_ratio 计算输出分辨率（默认竖屏 1080x1920）
+    output_width, output_height = 1080, 1920
+    if video_ratio:
+        parts = video_ratio.split(":")
+        if len(parts) == 2:
+            try:
+                w, h = int(parts[0]), int(parts[1])
+                base = 1920
+                if w < h:
+                    # 竖屏
+                    output_width = round(base * w / h)
+                    output_height = base
+                else:
+                    # 横屏
+                    output_width = base
+                    output_height = round(base * h / w)
+                # 对齐到偶数
+                output_width = output_width - output_width % 2
+                output_height = output_height - output_height % 2
+            except (ValueError, ZeroDivisionError):
+                output_width, output_height = 1080, 1920
+    resolution = f"{output_width}x{output_height}"
+
+    logger.info(
+        "[预览生成] 分辨率: video_ratio=%s → %s (%dx%d)",
+        video_ratio, resolution, output_width, output_height,
+    )
+
     # 从模板读取 editing_mode / mode 作为 strategy_id（渲染 pipeline 的 mode 参数）
     strategy_id = _resolve_strategy_id_from_template(request.template_id, db, user_id)
 
-    # 处理标题配置：如果有标题文本，序列化到 custom_title 字段传递给 worker
     title_config = request.title_config or {}
-    title_text = (title_config.get("text") or "").strip()
-    custom_title_value = ""
-    if title_text:
-        # 将标题文本和样式配置序列化为 JSON 存入 custom_title
-        # Worker 端会解析 JSON 获取完整标题配置
-        custom_title_value = json.dumps(title_config, ensure_ascii=False)
-        logger.info(
-            "[预览生成] 标题配置: text=%s, config_keys=%s",
-            title_text[:30],
-            list(title_config.keys()),
-        )
 
     use_case = CreateGenerationTaskUseCase(generation_task_repository)
 
@@ -300,12 +315,14 @@ def create_preview_generation_task(
                 asset_select_mode="",
                 batch_id="",
                 video_title=request.video_title,
-                resolution="",
+                resolution=resolution,
                 bgm_config=request.bgm_config or {},
                 auto_retry_enabled=False,
                 auto_retry_max=0,
                 is_preview=True,
-                custom_title=custom_title_value,
+                title_config=title_config,
+                output_width=output_width,
+                output_height=output_height,
             )
         )
     except ValueError as e:

apps/api/app/api/routes/generation_tasks.py

@@ -16,6 +16,7 @@ from app.core.task_enqueue import (
 from app.dependencies import (
     get_asset_library_repository,
     get_asset_repository,
+    get_db_session,
     get_generated_video_repository,
     get_generation_task_repository,
     get_project_repository,
@@ -32,6 +33,7 @@ from app.schemas.generation_task import (
     ListGenerationTasksResponse,
 )
 from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
 
 from packages.application import (
     CreateGenerationTaskCommand,
@@ -68,7 +70,7 @@ def _to_generation_task_response(task) -> GenerationTaskResponse:
         output_width=getattr(task, "output_width", 1280),
         output_height=getattr(task, "output_height", 720),
         cover_url=getattr(task, "cover_url", ""),
-        custom_title=getattr(task, "custom_title", ""),
+        title_config=getattr(task, "title_config", {}) or {},
         logs=getattr(task, "logs", "[]"),
         status=task.status,
         progress=task.progress,
@@ -142,6 +144,54 @@ def _select_assets_from_library(
     return [a.id for a in ready_video_assets]
 
 
+
+def _writeback_edit_plan_config(
+    plan_id: str,
+    task_id: str,
+    title_config: dict | None,
+    db: Session,
+) -> None:
+    """任务入队成功后，回写 EditPlan.config：generation_task_id + title_config。
+
+    用 merge 方式更新，不整体覆盖 config，避免丢失其他字段。
+    失败只记日志，不影响任务创建。
+    """
+    if not plan_id:
+        return
+    try:
+        from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+        plan_model = db.query(EditPlanModel).filter(EditPlanModel.id == plan_id).first()
+        if plan_model is None:
+            logger.warning("[生成任务] 回写plan.config失败: plan不存在 plan_id=%s", plan_id)
+            return
+
+        current_config = plan_model.config if isinstance(plan_model.config, dict) else {}
+        merged = dict(current_config)
+        merged["generation_task_id"] = task_id
+        if title_config:
+            merged["title_config"] = title_config
+        plan_model.config = merged
+        db.commit()
+        logger.info(
+            "[生成任务] 回写plan.config成功: plan_id=%s task_id=%s keys=%s",
+            plan_id,
+            task_id,
+            list(merged.keys()),
+        )
+    except Exception as e:
+        logger.warning(
+            "[生成任务] 回写plan.config异常（不影响任务创建）: plan_id=%s error=%s",
+            plan_id,
+            e,
+            exc_info=True,
+        )
+        try:
+            db.rollback()
+        except Exception:
+            pass
+
+
 def _resolve_project_and_library(
     request: CreateGenerationTaskRequest,
     project_repository: Any,
@@ -187,6 +237,7 @@ def create_generation_task(
     project_repository: Any = Depends(get_project_repository),
     asset_library_repository: Any = Depends(get_asset_library_repository),
     asset_repository: Any = Depends(get_asset_repository),
+    db: Session = Depends(get_db_session),
 ) -> BatchGenerationTaskResponse:
     logger.info(
         "[生成任务] 接收请求: user_id=%s, template_id=%s, asset_count=%d, mode=%s, count=%d",
@@ -242,6 +293,89 @@ def create_generation_task(
                     detail="当前项目没有符合条件的视频素材，请先上传并等待导入完成后再生成。",
                 )
 
+    # ── 兜底复用预览产物 ──
+    # 前端刷新后 previewTaskId 丢失，降级调 create 接口时，
+    # 如果同一 edit_plan 有已完成的预览任务，直接复用（秒出）。
+    if request.source_edit_plan_id and not request.is_preview:
+        try:
+            from packages.adapters.sqlalchemy_impl.models import (
+                GenerationTaskModel,
+            )
+
+            _preview_model = (
+                db.query(GenerationTaskModel)
+                .filter(
+                    GenerationTaskModel.source_edit_plan_id == request.source_edit_plan_id,
+                    GenerationTaskModel.is_preview.is_(True),
+                    GenerationTaskModel.status == "completed",
+                    GenerationTaskModel.created_by_user_id == authenticated_user.user.id,
+                )
+                .order_by(GenerationTaskModel.created_at.desc())
+                .first()
+            )
+            if _preview_model is not None:
+                # 校验分辨率一致性（与 confirm 端点逻辑相同）
+                req_w = request.output_width or 0
+                req_h = request.output_height or 0
+                src_w = getattr(_preview_model, "output_width", 0) or 0
+                src_h = getattr(_preview_model, "output_height", 0) or 0
+                resolution_match = (req_w == 0 or req_w == src_w) and (req_h == 0 or req_h == src_h)
+
+                if resolution_match:
+                    from packages.adapters.sqlalchemy_impl.generation_task_repository import (
+                        _to_domain,
+                    )
+
+                    preview_task = _to_domain(_preview_model)
+
+                    # 如果传了标题，更新 title_config
+                    fallback_title_config = None
+                    if request.title_config and request.title_config.get("text", "").strip():
+                        fallback_title_config = dict(preview_task.title_config or {})
+                        fallback_title_config.update(request.title_config)
+
+                    preview_task.mark_confirmed(
+                        cover_url=request.cover_url or preview_task.cover_url,
+                        output_width=request.output_width or preview_task.output_width,
+                        output_height=request.output_height or preview_task.output_height,
+                        title_config=fallback_title_config,
+                    )
+                    generation_task_repository.update(preview_task)
+
+                    # 同步标题到 EditPlan.config
+                    if fallback_title_config:
+                        _writeback_edit_plan_config(
+                            plan_id=request.source_edit_plan_id,
+                            task_id=preview_task.id,
+                            title_config=fallback_title_config,
+                            db=db,
+                        )
+
+                    logger.info(
+                        "[生成任务] 兜底复用预览产物: preview_task_id=%s, plan_id=%s",
+                        preview_task.id,
+                        request.source_edit_plan_id,
+                    )
+                    return BatchGenerationTaskResponse(
+                        items=[_to_generation_task_response(preview_task)],
+                        total=1,
+                    )
+                else:
+                    logger.info(
+                        "[生成任务] 兜底复用跳过（分辨率不一致）: plan_id=%s, src=%sx%s, req=%sx%s",
+                        request.source_edit_plan_id,
+                        src_w,
+                        src_h,
+                        req_w,
+                        req_h,
+                    )
+        except Exception:
+            logger.warning(
+                "[生成任务] 兜底复用预览产物异常（不影响主流程）: plan_id=%s",
+                request.source_edit_plan_id,
+                exc_info=True,
+            )
+
     use_case = CreateGenerationTaskUseCase(generation_task_repository)
     count = request.count
     created_tasks = []
@@ -303,10 +437,53 @@ def create_generation_task(
                     output_width=request.output_width,
                     output_height=request.output_height,
                     cover_url=request.cover_url,
-                    custom_title=request.custom_title,
+                    title_config=request.title_config or {},
                 )
             )
             try:
+                # 兜底关联编辑计划：前端未传 source_edit_plan_id 时，
+                # 通过 template_id + user_id 在 DB 层直接查找最新的 plan。
+                # 必须在 enqueue 之前执行，避免 worker 读取时 source_edit_plan_id 为空（竞态条件）
+                if not task.source_edit_plan_id and request.template_id:
+                    try:
+                        from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+                        _plan_model = (
+                            db.query(EditPlanModel)
+                            .filter(
+                                EditPlanModel.template_id == request.template_id,
+                                EditPlanModel.created_by_user_id == user_id,
+                            )
+                            .order_by(EditPlanModel.created_at.desc())
+                            .first()
+                        )
+                        if _plan_model:
+                            task.source_edit_plan_id = _plan_model.id
+                            generation_task_repository.update(task)
+                            logger.info(
+                                "[生成任务] 自动关联编辑计划: task_id=%s plan_id=%s",
+                                task.id,
+                                _plan_model.id,
+                            )
+                    except Exception:
+                        logger.warning(
+                            "[生成任务] 查找关联编辑计划失败（不影响主流程）: task_id=%s",
+                            task.id,
+                            exc_info=True,
+                        )
+
+                # 回写 plan.config：必须在 enqueue 之前执行，
+                # 确保 worker 读取 plan 时 config 中已包含 generation_task_id。
+                # 只在首个任务时回写一次，避免批量生成时循环覆盖。
+                _effective_plan_id = task.source_edit_plan_id
+                if _effective_plan_id and len(created_tasks) == 0:
+                    _writeback_edit_plan_config(
+                        plan_id=_effective_plan_id,
+                        task_id=task.id,
+                        title_config=request.title_config,
+                        db=db,
+                    )
+
                 if safe_enqueue_generation_task(
                     task,
                     generation_task_repository,
@@ -351,6 +528,7 @@ def confirm_generation(
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
     generation_task_repository: Any = Depends(get_generation_task_repository),
     project_repository: Any = Depends(get_project_repository),
+    db: Session = Depends(get_db_session),
 ) -> BatchGenerationTaskResponse:
     """确认生成 -- 复用预览渲染产物（预览与正式品质一致）。
 
@@ -379,13 +557,29 @@ def confirm_generation(
         resolution_match = (req_w == 0 or req_w == src_w) and (req_h == 0 or req_h == src_h)
 
         if resolution_match:
+            # 如果用户传了 custom_title，同步更新 title_config
+            confirmed_title_config = None
+            if request.custom_title and request.custom_title.strip():
+                confirmed_title_config = dict(getattr(source_task, "title_config", {}) or {})
+                confirmed_title_config["text"] = request.custom_title.strip()
+
             source_task.mark_confirmed(
                 cover_url=request.cover_url,
-                custom_title=request.custom_title,
                 output_width=request.output_width,
                 output_height=request.output_height,
+                title_config=confirmed_title_config,
             )
             generation_task_repository.update(source_task)
+
+            # 同步标题到 EditPlan.config
+            if confirmed_title_config and source_task.source_edit_plan_id:
+                _writeback_edit_plan_config(
+                    plan_id=source_task.source_edit_plan_id,
+                    task_id=source_task.id,
+                    title_config=confirmed_title_config,
+                    db=db,
+                )
+
             logger.info(
                 "[确认生成] 复用预览产物: task_id=%s, user_id=%s",
                 task_id,
@@ -427,7 +621,6 @@ def confirm_generation(
             output_width=request.output_width,
             output_height=request.output_height,
             cover_url=request.cover_url,
-            custom_title=request.custom_title,
         )
     )
 
@@ -560,7 +753,6 @@ def retry_generation_task(
             output_width=getattr(task, "output_width", 1280),
             output_height=getattr(task, "output_height", 720),
             cover_url=getattr(task, "cover_url", ""),
-            custom_title=getattr(task, "custom_title", ""),
         )
     )
     try:

apps/api/app/api/routes/templates_editor/__init__.py

@@ -1,10 +1,9 @@
 """模板编辑器 API 路由包.
 
-将原来 2560 行的 templates_editor.py 巨无霸拆分为 12 个模块：
+模块拆分：
 - schemas.py:        所有 Pydantic model
 - dependencies.py:   依赖注入
 - _utils.py:         工具函数
-- _fallback.py:      自动兜底逻辑
 - draft.py:          草稿管理（详情/更新/发布/版本/回滚）
 - clips.py:          片段管理（CRUD/分割/合并/重排/批量删除/从素材创建）
 - adjustments.py:    片段调整（速度/音量/裁剪/批量调速）
@@ -13,7 +12,6 @@
 - export.py:         导出配置
 - subtitles.py:      字幕管理
 - ai_features.py:    AI 推荐
-- generation.py:     生成（触发/进度/记录）
 - timeline.py:       时间线
 
 挂载路径: /api/v1/templates/{template_id}/editor/
@@ -34,7 +32,6 @@ from .dependencies import get_draft_plan_id, get_editor_services  # noqa: F401
 from .draft import router as draft_router
 from .effects import router as effects_router
 from .export import router as export_router
-from .generation import router as generation_router
 from .subtitles import router as subtitles_router
 from .timeline import router as timeline_router
 
@@ -51,7 +48,6 @@ _sub_routers = [
     export_router,
     subtitles_router,
     ai_features_router,
-    generation_router,
     timeline_router,
 ]
 

apps/api/app/api/routes/templates_editor/_fallback.py

@@ -1,227 +0,0 @@
-"""模板编辑器自动兜底逻辑.
-
-generate_editor_draft 触发生成前的自动修复流程：
-1. draft → editing 状态迁移
-2. 无片段时从模板复制片段配置
-3. 为无素材片段分配指定素材
-4. 项目有素材库时自动选素材
-"""
-
-from __future__ import annotations
-
-import logging
-import random
-from typing import Any
-
-from app.services.edit_plan_service import EditPlanService
-from sqlalchemy.orm import Session
-
-from packages.adapters.sqlalchemy_impl.template_clip_config_repository import (
-    SQLAlchemyTemplateClipConfigRepository,
-)
-from packages.adapters.sqlalchemy_impl.template_repository import (
-    SQLAlchemyTemplateRepository,
-)
-from packages.domain.edit_plan import EditPlanStatus
-
-logger = logging.getLogger(__name__)
-
-
-def _auto_fallback_draft_to_editing(svc: EditPlanService, plan_id: str, plan_check) -> None:
-    """自动兜底 1: draft → editing"""
-    if plan_check.status == EditPlanStatus.DRAFT:
-        logger.info("模板编辑器自动兜底: plan=%s draft→editing", plan_id)
-        svc.transition_status(plan_id, EditPlanStatus.EDITING)
-
-
-def _auto_fallback_copy_template_clips(svc: EditPlanService, plan_id: str, plan_check, db: Session) -> None:
-    """自动兜底 2: 无片段 + 有 template_id → 从模板复制片段配置"""
-    existing_clips = svc.count_clips(plan_id)
-    if existing_clips == 0 and plan_check.template_id:
-        logger.info(
-            "模板编辑器自动兜底: plan=%s 无片段，从模板 %s 复制片段配置",
-            plan_id,
-            plan_check.template_id,
-        )
-        clip_config_repo = SQLAlchemyTemplateClipConfigRepository(db)
-        configs = clip_config_repo.list_by_template(plan_check.template_id)
-        if configs:
-            for cfg in configs:
-                svc.create_clip(
-                    plan_id=plan_id,
-                    clip_type=cfg.clip_type.value if hasattr(cfg.clip_type, "value") else cfg.clip_type,
-                    order=cfg.order,
-                    template_clip_config_id=cfg.id,
-                    duration=cfg.default_duration,
-                    transition_effect=(
-                        cfg.transition_effect.value
-                        if hasattr(cfg.transition_effect, "value")
-                        else cfg.transition_effect
-                    ),
-                )
-            logger.info(
-                "模板编辑器自动兜底: plan=%s 从 template_clip_configs 复制了 %d 个片段",
-                plan_id,
-                len(configs),
-            )
-        else:
-            tpl_repo = SQLAlchemyTemplateRepository(db)
-            segments = tpl_repo.list_segments(plan_check.template_id)
-            for seg in segments:
-                avg_duration = (seg.duration_min + seg.duration_max) / 2
-                svc.create_clip(
-                    plan_id=plan_id,
-                    clip_type="main",
-                    order=seg.segment_order,
-                    duration=avg_duration,
-                    config={
-                        "material_type": seg.material_type or "",
-                        "template_segment_id": seg.id,
-                    },
-                )
-            logger.info(
-                "模板编辑器自动兜底: plan=%s 从旧模板 segments 复制了 %d 个片段",
-                plan_id,
-                len(segments),
-            )
-
-
-def _auto_fallback_assign_assets(svc: EditPlanService, plan_id: str, plan_check) -> list:
-    """自动兜底 3: 为没有素材的片段分配素材。返回剩余无素材片段列表。"""
-    all_clips = svc.list_clips(plan_id)
-    clips_without_asset = [c for c in all_clips if not c.asset_id]
-    config_asset_ids = (plan_check.config or {}).get("asset_ids", [])
-
-    logger.info(
-        "模板编辑器自动兜底3 诊断: plan=%s total_clips=%d " "clips_without_asset=%d config_asset_ids=%r",
-        plan_id,
-        len(all_clips),
-        len(clips_without_asset),
-        config_asset_ids[:5] if config_asset_ids else [],
-    )
-
-    if clips_without_asset and config_asset_ids:
-        logger.info(
-            "模板编辑器自动兜底3: plan=%s 为 %d 个无素材片段分配 %d 个指定素材",
-            plan_id,
-            len(clips_without_asset),
-            len(config_asset_ids),
-        )
-        assigned = 0
-        for i, clip in enumerate(clips_without_asset):
-            asset_idx = i % len(config_asset_ids)
-            try:
-                svc.assign_asset(clip.id, config_asset_ids[asset_idx])
-                assigned += 1
-            except Exception as exc:
-                logger.error(
-                    "模板编辑器自动兜底3: plan=%s clip=%s 分配素材 %s 失败: %s",
-                    plan_id,
-                    clip.id,
-                    config_asset_ids[asset_idx],
-                    exc,
-                )
-        logger.info(
-            "模板编辑器自动兜底3: plan=%s 素材分配完成 assigned=%d/%d",
-            plan_id,
-            assigned,
-            len(clips_without_asset),
-        )
-        # 重新检查剩余无素材片段
-        all_clips_after = svc.list_clips(plan_id)
-        clips_without_asset = [c for c in all_clips_after if not c.asset_id]
-        if clips_without_asset:
-            logger.warning(
-                "模板编辑器自动兜底3: plan=%s 仍有 %d 个片段无素材",
-                plan_id,
-                len(clips_without_asset),
-            )
-    elif not clips_without_asset:
-        logger.info("模板编辑器自动兜底3: plan=%s 所有片段已有素材，跳过", plan_id)
-    elif not config_asset_ids:
-        logger.info(
-            "模板编辑器自动兜底3: plan=%s config.asset_ids 为空，跳过分配",
-            plan_id,
-        )
-
-    return clips_without_asset
-
-
-def _auto_fallback_auto_material_mode(
-    svc: EditPlanService,
-    plan_id: str,
-    plan_check,
-    clips_without_asset: list,
-    asset_library_repo: Any,
-    asset_repo: Any,
-    user_id: str = "",
-) -> None:
-    """自动兜底 4: 自动选素材分配给无素材片段
-
-    查找策略（按优先级）：
-    1. plan 有 project_id → 从项目素材库查找
-    2. plan 无 project_id 但有 user_id → 从用户上传的素材中查找
-    """
-    if not clips_without_asset:
-        return
-
-    ready_videos: list = []
-    source_desc = ""
-
-    # 策略 1: 通过 project_id 查找项目素材库
-    if plan_check.project_id:
-        libs = asset_library_repo.find_by_project(plan_check.project_id)
-        video_lib = None
-        for lib in libs:
-            lib_kind = lib.kind.value if hasattr(lib.kind, "value") else lib.kind
-            if lib_kind == "video":
-                video_lib = lib
-                break
-        if video_lib:
-            assets = asset_repo.find_by_library(video_lib.id)
-            ready_videos = [
-                a
-                for a in assets
-                if (a.status.value if hasattr(a.status, "value") else a.status) == "ready"
-                and a.mime_type
-                and a.mime_type.startswith("video")
-            ]
-            source_desc = f"素材库 {video_lib.name}"
-
-    # 策略 2: 通过 user_id 查找用户上传的素材
-    if not ready_videos and user_id and hasattr(asset_repo, "find_ready_videos_by_user"):
-        logger.info(
-            "模板编辑器自动兜底4: plan=%s project_id 为空，尝试通过 user_id=%s 查找素材",
-            plan_id,
-            user_id,
-        )
-        ready_videos = asset_repo.find_ready_videos_by_user(user_id)
-        source_desc = f"用户上传 (user_id={user_id[:8]}...)"
-
-    if not ready_videos:
-        logger.warning(
-            "模板编辑器自动兜底4: plan=%s 未找到可用素材 (project_id=%s, user_id=%s)",
-            plan_id,
-            plan_check.project_id or "(empty)",
-            user_id[:8] + "..." if user_id else "(empty)",
-        )
-        return
-
-    logger.info(
-        "模板编辑器自动兜底4: plan=%s 自动选素材分配给 %d 个无素材片段 (来源: %s, 共 %d 个)",
-        plan_id,
-        len(clips_without_asset),
-        source_desc,
-        len(ready_videos),
-    )
-    random.shuffle(ready_videos)
-    for i, clip in enumerate(clips_without_asset):
-        asset = ready_videos[i % len(ready_videos)]
-        svc.assign_asset(clip.id, asset.id)
-    logger.info(
-        "模板编辑器自动兜底4: plan=%s 从 %s 分配了 %d 个素材给 %d 个片段",
-        plan_id,
-        source_desc,
-        len(ready_videos),
-        len(clips_without_asset),
-    )

apps/api/app/api/routes/templates_editor/dependencies.py

@@ -3,7 +3,6 @@
 核心依赖：
 - get_editor_services: 获取模板+计划服务
 - get_draft_plan_id: 根据 template_id 获取或创建草稿，返回 plan_id
-- _check_queue_limits: 生成队列限流检查
 """
 
 from __future__ import annotations
@@ -11,7 +10,6 @@ from __future__ import annotations
 import logging
 
 from app.auth import AuthenticatedUser, get_current_user
-from app.core.task_enqueue import GLOBAL_PENDING_LIMIT, USER_PENDING_LIMIT
 from app.dependencies import get_db_session
 from app.services.edit_plan_service import EditPlanService
 from app.services.edit_template_service import EditTemplateService
@@ -113,29 +111,3 @@ def get_draft_plan_id(
         user_id,
     )
     return plan.id
-
-
-def _check_queue_limits(gen_task_repo, user_id: str) -> None:
-    """队列限流预检查"""
-    try:
-        has_count = (
-            hasattr(gen_task_repo, "count_pending_by_user")
-            and hasattr(gen_task_repo, "count_pending_total")
-        )
-        if has_count:
-            user_pending = gen_task_repo.count_pending_by_user(user_id)
-            global_pending = gen_task_repo.count_pending_total()
-            if user_pending >= USER_PENDING_LIMIT:
-                raise HTTPException(
-                    status_code=429,
-                    detail=f"您的待处理任务过多（当前 {user_pending}/{USER_PENDING_LIMIT}），请等待完成后再提交",
-                )
-            if global_pending >= GLOBAL_PENDING_LIMIT:
-                raise HTTPException(
-                    status_code=503,
-                    detail="系统繁忙，请稍后再试",
-                )
-    except HTTPException:
-        raise
-    except Exception as e:
-        logger.warning("[模板编辑器队列限流] 检查失败，跳过: %s", e)

apps/api/app/api/routes/templates_editor/draft.py

@@ -17,6 +17,8 @@ from fastapi import APIRouter, Depends, HTTPException, Query, status
 
 from .dependencies import get_draft_plan_id, get_editor_services
 from .schemas import (
+    EditorClipBatchUpdateRequest,
+    EditorClipBatchUpdateResponse,
     EditorDraftResponse,
     EditorPublishResponse,
     EditorRollbackRequest,
@@ -126,11 +128,7 @@ def list_template_versions(
             clip_count=len(v.clip_configs),
             change_note=v.change_note,
             published_by=v.published_by,
-            created_at=(
+            created_at=(v.created_at.isoformat() if hasattr(v.created_at, "isoformat") else str(v.created_at)),
-                v.created_at.isoformat()
-                if hasattr(v.created_at, "isoformat")
-                else str(v.created_at)
-            ),
         )
         for v in versions
     ]
@@ -162,3 +160,35 @@ def rollback_template(
         new_version=tpl.version,
         clip_count=len(clip_configs),
     )
+
+
+@router.put("/clips", response_model=EditorClipBatchUpdateResponse)
+def batch_update_clips(
+    template_id: str,
+    req: EditorClipBatchUpdateRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+):
+    """批量替换草稿clips（全量覆盖，用于前端选择素材后同步片段）
+
+    事务保证：清空→创建→标记ready 在同一数据库事务内完成，
+    任何步骤失败时自动回滚，避免数据不一致。
+    """
+    _, plan_svc = services
+    plan_svc.get_plan_or_raise(plan_id)
+
+    clips_data = []
+    for clip_item in req.clips:
+        item = {
+            "asset_id": clip_item.asset_id,
+            "start_time": clip_item.start_time,
+            "duration": clip_item.duration,
+        }
+        if clip_item.order is not None:
+            item["order"] = clip_item.order
+        clips_data.append(item)
+
+    plan_svc.replace_all_clips_transactional(plan_id, clips_data)
+
+    return EditorClipBatchUpdateResponse(plan_id=plan_id, clip_count=len(req.clips))

apps/api/app/api/routes/templates_editor/generation.py

@@ -1,383 +0,0 @@
-"""草稿生成路由.
-
-端点：
-- POST /generate              触发生成
-- GET  /generation-status     生成进度
-- GET  /generations           生成记录列表
-"""
-
-from __future__ import annotations
-
-import json
-import logging
-from typing import Any, Optional
-
-from app.auth import AuthenticatedUser, get_current_user
-from app.core.celery_app import celery_app
-from app.core.storage import OSSStorageService, get_storage_service
-from app.dependencies import (
-    get_asset_library_repository,
-    get_asset_repository,
-    get_db_session,
-    get_generated_video_repository,
-)
-from app.schemas.generation_task import GenerationTaskResponse
-from app.services.edit_plan_service import EditPlanService
-from app.services.edit_template_service import EditTemplateService
-from fastapi import APIRouter, Depends, HTTPException, status
-from sqlalchemy.orm import Session
-
-from packages.adapters.sqlalchemy_impl.generation_task_repository import (
-    SQLAlchemyGenerationTaskRepository,
-)
-from packages.application.generated_videos import ListGeneratedVideosByTaskUseCase
-from packages.application.generation_tasks import (
-    CreateGenerationTaskCommand,
-    CreateGenerationTaskUseCase,
-)
-from packages.domain.edit_plan import EditPlanStatus
-
-from ._fallback import (
-    _auto_fallback_assign_assets,
-    _auto_fallback_auto_material_mode,
-    _auto_fallback_copy_template_clips,
-    _auto_fallback_draft_to_editing,
-)
-from .dependencies import _check_queue_limits, get_draft_plan_id, get_editor_services
-from .schemas import (
-    ClipStatusItem,
-    EditPlanGenerateRequest,
-    EditPlanGenerateResponse,
-    EditPlanGenerationsResponse,
-    EditPlanGenerationStatusResponse,
-)
-
-logger = logging.getLogger(__name__)
-router = APIRouter(tags=["Template Editor"])
-
-
-@router.post("/generate", response_model=EditPlanGenerateResponse)
-def generate_editor_draft(
-    template_id: str,
-    request: Optional[EditPlanGenerateRequest] = None,
-    plan_id: str = Depends(get_draft_plan_id),
-    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
-    db: Session = Depends(get_db_session),
-    current_user: AuthenticatedUser = Depends(get_current_user),
-    asset_library_repo: Any = Depends(get_asset_library_repository),
-    asset_repo: Any = Depends(get_asset_repository),
-) -> EditPlanGenerateResponse:
-    """触发模板草稿渲染生成"""
-    req = request or EditPlanGenerateRequest()
-    _, plan_svc = services
-    plan_check = plan_svc.get_plan_or_raise(plan_id)
-
-    # 自动兜底流程
-    _auto_fallback_draft_to_editing(plan_svc, plan_id, plan_check)
-    _auto_fallback_copy_template_clips(plan_svc, plan_id, plan_check, db)
-    clips_without_asset = _auto_fallback_assign_assets(plan_svc, plan_id, plan_check)
-    _auto_fallback_auto_material_mode(
-        plan_svc,
-        plan_id,
-        plan_check,
-        clips_without_asset,
-        asset_library_repo,
-        asset_repo,
-        user_id=str(current_user.user.id),
-    )
-
-    # 检查是否可复用已完成的预览产物（预览品质已与正式一致）
-    gen_task_repo = SQLAlchemyGenerationTaskRepository(db)
-    reusable_task = _find_reusable_preview_task(gen_task_repo, plan_id, plan_check)
-    if reusable_task:
-        # 复用预览产物：标记为正式产出，跳过渲染
-        # 如果前端传了 title_config，需要创建新任务（因为预览任务的 custom_title 可能不同）
-        title_config_reuse = req.title_config or {}
-        title_text_reuse = (title_config_reuse.get("text") or "").strip()
-        existing_custom_title = getattr(reusable_task, "custom_title", "") or ""
-        if title_text_reuse and existing_custom_title:
-            # 如果新标题和已有标题不同，不能复用，走新建任务流程
-            new_title_json = json.dumps(title_config_reuse, ensure_ascii=False)
-            if new_title_json != existing_custom_title:
-                logger.info(
-                    "[模板生成] 标题已变更，跳过复用: task_id=%s",
-                    reusable_task.id,
-                )
-                reusable_task = None
-        elif title_text_reuse and not existing_custom_title:
-            # 原来没标题，现在有标题，不能复用
-            logger.info(
-                "[模板生成] 新增标题，跳过复用: task_id=%s",
-                reusable_task.id,
-            )
-            reusable_task = None
-        elif not title_text_reuse and existing_custom_title:
-            # 原来有标题，现在移除了，不能复用
-            logger.info(
-                "[模板生成] 移除标题，跳过复用: task_id=%s",
-                reusable_task.id,
-            )
-            reusable_task = None
-
-    if reusable_task:
-        # 复用预览产物：标记为正式产出，跳过渲染
-        reusable_task.mark_confirmed()
-        gen_task_repo.update(reusable_task)
-
-        # 将产物 URL 写入 plan config
-        rendered_url = _get_task_output_url(reusable_task, gen_task_repo, db)
-        plan_svc.update_plan_config(
-            plan_id,
-            {
-                "generation_task_id": reusable_task.id,
-                "rendered_storage_key": rendered_url,  # 统一用 rendered_storage_key
-            },
-        )
-        plan_svc.transition_status(plan_id, EditPlanStatus.COMPLETED)
-
-        updated_plan = plan_svc.get_plan_or_raise(plan_id)
-        logger.info(
-            "模板编辑器复用预览产物: template_id=%s plan_id=%s task_id=%s by user=%s",
-            template_id,
-            plan_id,
-            reusable_task.id,
-            current_user.user.id,
-        )
-        return EditPlanGenerateResponse(
-            plan_id=plan_id,
-            plan_status=updated_plan.status.value if hasattr(updated_plan.status, "value") else updated_plan.status,
-            generation_task_id=reusable_task.id,
-            clip_count=len((plan_check.config or {}).get("clips", [])),
-        )
-
-    # 检查是否可生成（含最后防线自动修复 + 诊断日志）
-    try:
-        can_gen, reason = plan_svc.can_generate(plan_id)
-    except ValueError as exc:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
-    if not can_gen:
-        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=reason)
-
-    try:
-        clip_count = plan_svc.mark_clips_ready(plan_id)
-
-        user_id = current_user.user.id
-        _check_queue_limits(gen_task_repo, user_id)
-
-        gen_task_use_case = CreateGenerationTaskUseCase(gen_task_repo)
-        plan = plan_svc.get_plan_or_raise(plan_id)
-        config_asset_ids = (plan.config or {}).get("asset_ids", [])
-        # 从 plan config 读取封面 URL（由 generate-cover 保存）
-        cover_url_from_config = (plan.config or {}).get("cover", {}).get("image_url", "")
-
-        # 处理标题配置：序列化 title_config 为 JSON 存入 custom_title
-        title_config = req.title_config or {}
-        title_text = (title_config.get("text") or "").strip()
-        custom_title_value = ""
-        if title_text:
-            custom_title_value = json.dumps(title_config, ensure_ascii=False)
-            logger.info(
-                "[模板生成] 标题配置: text=%s, config_keys=%s",
-                title_text[:30],
-                list(title_config.keys()),
-            )
-
-        gen_task = gen_task_use_case.execute(
-            CreateGenerationTaskCommand(
-                project_id=plan.project_id or "",
-                template_id=plan.template_id,
-                created_by_user_id=current_user.user.id,
-                source_edit_plan_id=plan_id,
-                asset_ids=list(config_asset_ids) if config_asset_ids else [],
-                cover_url=cover_url_from_config,
-                custom_title=custom_title_value,
-            ),
-        )
-
-        plan_svc.update_plan_config(plan_id, {"generation_task_id": gen_task.id})
-        plan_svc.transition_status(plan_id, EditPlanStatus.RENDERING)
-        celery_app.send_task("worker.render_edit_plan", args=[plan_id])
-
-        updated_plan = plan_svc.get_plan_or_raise(plan_id)
-
-        logger.info(
-            "模板编辑器触发生成: template_id=%s plan_id=%s gen_task_id=%s clips=%d by user=%s",
-            template_id,
-            plan_id,
-            gen_task.id,
-            clip_count,
-            current_user.user.id,
-        )
-
-        return EditPlanGenerateResponse(
-            plan_id=plan_id,
-            plan_status=updated_plan.status.value if hasattr(updated_plan.status, "value") else updated_plan.status,
-            generation_task_id=gen_task.id,
-            clip_count=clip_count,
-        )
-    except HTTPException:
-        raise
-    except Exception as _e:
-        logger.exception(
-            "模板编辑器触发生成失败: template_id=%s plan_id=%s",
-            template_id,
-            plan_id,
-        )
-        try:
-            plan_svc.transition_status(plan_id, EditPlanStatus.FAILED)
-        except Exception:
-            pass
-        raise HTTPException(
-            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
-            detail="生成失败，请稍后重试",
-        ) from _e
-
-
-def _find_reusable_preview_task(gen_task_repo, plan_id: str, plan) -> "object | None":
-    """查找该 plan 关联的已完成预览任务，判断是否可复用。
-
-    复用条件：
-    1. 存在 source_edit_plan_id == plan_id 的已完成预览任务
-    2. plan 在预览完成后未被修改（updated_at <= 预览完成时间）
-
-    Returns:
-        可复用的 GenerationTask，或 None
-    """
-    try:
-        tasks = gen_task_repo.list_by_source_edit_plan(plan_id)
-    except Exception:
-        return None
-
-    for task in tasks:
-        if not getattr(task, "is_preview", False):
-            continue
-        if not task.is_completed:
-            continue
-        # 检查 plan 是否在预览完成后被修改
-        completed_at = getattr(task, "completed_at", None)
-        if completed_at and hasattr(plan, "updated_at"):
-            plan_updated = plan.updated_at
-            # 如果 plan.updated_at 为空，无法判断是否修改过，跳过
-            if plan_updated is None:
-                continue
-            # 如果 plan 在预览完成后又被修改了，不能复用
-            if plan_updated > completed_at:
-                continue
-        return task
-    return None
-
-
-def _get_task_output_url(task, gen_task_repo, db) -> str:
-    """获取任务的输出视频 URL。"""
-    try:
-        video_repo = get_generated_video_repository(db)
-        use_case = ListGeneratedVideosByTaskUseCase(video_repo)
-        videos = use_case.execute(task.id)
-        if videos:
-            url = getattr(videos[0], "file_url", "") or ""
-            # 规范化：合并路径中的双斜杠（保留协议头 ://）
-            if url:
-                import re as _re
-                url = _re.sub(r"(?<!:)//", "/", url)
-            return url
-    except Exception:
-        pass
-    return ""
-
-
-@router.get("/generation-status", response_model=EditPlanGenerationStatusResponse)
-def get_editor_generation_status(
-    template_id: str,
-    plan_id: str = Depends(get_draft_plan_id),
-    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
-    storage_service: OSSStorageService = Depends(get_storage_service),
-    _: AuthenticatedUser = Depends(get_current_user),
-) -> EditPlanGenerationStatusResponse:
-    """查询草稿生成进度"""
-    _, plan_svc = services
-    try:
-        gen_status = plan_svc.get_generation_status(plan_id)
-    except ValueError as exc:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
-
-    plan = gen_status["plan"]
-    clips = gen_status["clips"]
-
-    clip_items = [
-        ClipStatusItem(
-            clip_id=c.id,
-            clip_type=c.clip_type,
-            order=c.order,
-            status=c.status.value if hasattr(c.status, "value") else c.status,
-            asset_id=c.asset_id or "",
-            text_content=c.text_content or "",
-            duration=c.duration,
-        )
-        for c in clips
-    ]
-
-    raw_video_url = (plan.config or {}).get("rendered_storage_key", "") or (plan.config or {}).get("rendered_url", "")
-    video_url = ""
-    if raw_video_url:
-        if raw_video_url.startswith("http"):
-            video_url = raw_video_url  # 已经是完整 URL
-        else:
-            try:
-                video_url = storage_service.get_url(raw_video_url)  # storage_key -> 完整 URL
-            except Exception as e:
-                logger.warning("生成视频URL获取失败: template_id=%s error=%s", template_id, e)
-                video_url = raw_video_url
-
-    progress = gen_status.get("progress", 0.0)
-    error_message = gen_status.get("error_message", "")
-    gen_task_status = gen_status.get("generation_task_status")
-    plan_status_val = plan.status.value if hasattr(plan.status, "value") else plan.status
-    if plan_status_val == "completed" and progress < 100:
-        progress = 100.0
-
-    return EditPlanGenerationStatusResponse(
-        plan_id=plan_id,
-        plan_status=plan_status_val,
-        generation_task_id=gen_status["generation_task_id"],
-        generation_task_status=gen_task_status,
-        progress=progress,
-        video_url=video_url,
-        error_message=error_message,
-        clips=clip_items,
-    )
-
-
-@router.get("/generations", response_model=EditPlanGenerationsResponse)
-def list_editor_generations(
-    template_id: str,
-    plan_id: str = Depends(get_draft_plan_id),
-    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
-    db: Session = Depends(get_db_session),
-    _: AuthenticatedUser = Depends(get_current_user),
-) -> EditPlanGenerationsResponse:
-    """查询草稿关联的生成记录列表"""
-    _, plan_svc = services
-    plan_svc.get_plan_or_raise(plan_id)
-
-    gen_task_repo = SQLAlchemyGenerationTaskRepository(db)
-    tasks = gen_task_repo.list_by_source_edit_plan(plan_id)
-    items = [
-        GenerationTaskResponse(
-            id=t.id,
-            project_id=t.project_id,
-            asset_library_id=t.asset_library_id,
-            strategy_id=t.strategy_id,
-            voice_library_id=t.voice_library_id,
-            template_id=t.template_id,
-            asset_ids=t.asset_ids,
-            title_ids=t.title_ids,
-            voice_ids=t.voice_ids,
-            source_edit_plan_id=t.source_edit_plan_id or "",
-            status=t.status.value if hasattr(t.status, "value") else t.status,
-            progress=t.progress,
-            result_count=t.result_count,
-            error_message=t.error_message,
-        )
-        for t in tasks
-    ]
-    return EditPlanGenerationsResponse(items=items, total=len(items))

apps/api/app/api/routes/templates_editor/schemas.py

@@ -6,9 +6,8 @@
 from __future__ import annotations
 
 import re as _re
-from typing import Any, Dict, List, Optional
+from typing import Any, List, Optional
 
-from app.schemas.generation_task import GenerationTaskResponse
 from pydantic import BaseModel, Field, validator
 
 _EXPORT_RESOLUTION_PATTERN = _re.compile(r"^\d+x\d+$")
@@ -16,58 +15,6 @@ _EXPORT_VALID_QUALITY_PRESETS = {"ultra_fast", "fast", "balanced", "high", "best
 _EXPORT_VALID_FORMATS = {"mp4", "mov"}
 
 
-# ── 生成状态相关 ────────────────────────────────────────────────────────────
-
-
-class ClipStatusItem(BaseModel):
-    """片段生成状态"""
-
-    clip_id: str
-    clip_type: str
-    order: int
-    status: str
-    asset_id: str
-    text_content: str
-    duration: float
-
-
-class EditPlanGenerationStatusResponse(BaseModel):
-    """剪辑计划生成进度响应体"""
-
-    plan_id: str
-    plan_status: str
-    generation_task_id: Optional[str] = None
-    generation_task_status: Optional[str] = None
-    progress: float = 0.0
-    video_url: str = ""
-    error_message: str = ""
-    clips: List[ClipStatusItem]
-
-
-class EditPlanGenerateRequest(BaseModel):
-    """模板编辑器触发生成请求体"""
-    title_config: Optional[Dict[str, Any]] = Field(
-        default_factory=dict,
-        description="标题配置（可选），渲染时烧录到视频中。支持字段: text/font/font_size/font_color/position/bold/stroke/shadow",
-    )
-
-
-class EditPlanGenerateResponse(BaseModel):
-    """剪辑计划触发生成响应体"""
-
-    plan_id: str
-    plan_status: str
-    generation_task_id: str
-    clip_count: int
-
-
-class EditPlanGenerationsResponse(BaseModel):
-    """剪辑计划关联的生成记录列表响应体"""
-
-    items: List[GenerationTaskResponse]
-    total: int
-
-
 # ── AI 推荐 ────────────────────────────────────────────────────────────────
 
 
@@ -75,12 +22,8 @@ class AIRecommendRequest(BaseModel):
     """AI 推荐片段方案请求体"""
 
     asset_ids: List[str] = Field(default_factory=list, description="素材 ID 列表")
-    editing_mode: str = Field(
+    editing_mode: str = Field(default="one_take", description="剪辑模式: one_take / pip / voice_over / voice_pip")
-        default="one_take", description="剪辑模式: one_take / pip / voice_over / voice_pip"
+    target_duration: float = Field(default=30.0, ge=1.0, le=600.0, description="目标时长（秒）")
-    )
-    target_duration: float = Field(
-        default=30.0, ge=1.0, le=600.0, description="目标时长（秒）"
-    )
 
 
 class AIRecommendClipItem(BaseModel):
@@ -107,8 +50,6 @@ class AIRecommendResponse(BaseModel):
     confidence: float = Field(..., ge=0.0, le=1.0, description="AI 推荐置信度 (0~1)")
 
 
-
-
 # ── BGM ────────────────────────────────────────────────────────────────────
 
 
@@ -224,9 +165,7 @@ class ClipBatchDeleteResponse(BaseModel):
 class ClipsFromAssetsRequest(BaseModel):
     """从素材批量创建片段请求"""
 
-    asset_ids: List[str] = Field(
+    asset_ids: List[str] = Field(..., min_length=1, max_length=200, description="素材 ID 列表，按顺序追加到时间线末尾")
-        ..., min_length=1, max_length=200, description="素材 ID 列表，按顺序追加到时间线末尾"
-    )
     clip_type: str = Field(default="main", description="片段类型，默认 main")
 
 
@@ -501,6 +440,28 @@ class EditorClipUpdateRequest(BaseModel):
     config: Optional[dict[str, Any]] = None
 
 
+class EditorClipBatchItem(BaseModel):
+    """批量更新clips的单个片段"""
+
+    asset_id: str = Field(default="", max_length=100, description="关联素材ID，可为空（占位片段）")
+    start_time: float = Field(default=0.0, ge=0.0)
+    duration: float = Field(default=0.0, ge=0.0)
+    order: Optional[int] = Field(default=None, ge=0, description="排序，None表示按数组顺序")
+
+
+class EditorClipBatchUpdateRequest(BaseModel):
+    """批量替换clips请求（全量覆盖）"""
+
+    clips: List[EditorClipBatchItem] = Field(default_factory=list)
+
+
+class EditorClipBatchUpdateResponse(BaseModel):
+    """批量更新clips响应"""
+
+    plan_id: str
+    clip_count: int
+
+
 class EditorPublishResponse(BaseModel):
     """发布草稿响应"""
 

apps/api/app/api/routes/tts.py

@@ -20,6 +20,8 @@ from app.schemas.tts import (
     SaveToLibraryRequest,
     SaveToLibraryResponse,
     TTSJobResponse,
+    TTSPreviewRequest,
+    TTSPreviewResponse,
     TTSStatusResponse,
     TTSSynthesizeRequest,
     TTSSynthesizeResponse,
@@ -31,7 +33,7 @@ from packages.adapters.sqlalchemy_impl.tts_job_repository import (
     SQLAlchemyTTSJobRepository,
 )
 from packages.adapters.sqlalchemy_impl.voice_library_repository import SQLAlchemyVoiceLibraryRepository
-from packages.application.cosyvoice_service import CosyVoiceService
+from packages.application.cosyvoice_service import CosyVoiceError, CosyVoiceService
 from packages.application.tts_job.streaming_service import TTSStreamingService
 from packages.application.tts_job.use_cases import (
     CreateTTSJobUseCase,
@@ -373,6 +375,59 @@ def save_tts_job_to_library(
     )
 
 
+
+@router.post("/preview", response_model=TTSPreviewResponse)
+def preview_tts(
+    request: TTSPreviewRequest,
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    cosyvoice_service: CosyVoiceService = Depends(get_cosyvoice_service),
+    voice_clone_repo=Depends(get_voice_clone_profile_repository),
+) -> TTSPreviewResponse:
+    """TTS 预览（试听）——同步合成，立即返回音频 URL。
+
+    用于前端预览配音效果，限制文本长度 200 字以内。
+    支持预设音色和克隆音色：克隆音色传的是 profile UUID，需解析为 CosyVoice voice_id。
+    """
+    # 解析 voice_id：前端可能传 VoiceCloneProfile UUID 或预设音色 ID
+    actual_voice_id = request.voice_id
+    profile = voice_clone_repo.get(request.voice_id)
+    if profile is not None:
+        # 命中克隆音色 profile — 校验归属权限
+        if profile.user_id != authenticated_user.user.id:
+            raise HTTPException(
+                status_code=status.HTTP_403_FORBIDDEN,
+                detail="无权访问该音色",
+            )
+        if not profile.voice_id:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="音色克隆尚未完成，请稍后再试",
+            )
+        actual_voice_id = profile.voice_id
+
+    try:
+        result = cosyvoice_service.synthesize_speech(
+            text=request.text,
+            voice_id=actual_voice_id,
+            speed=request.speed,
+        )
+    except CosyVoiceError as e:
+        raise HTTPException(
+            status_code=status.HTTP_502_BAD_GATEWAY,
+            detail=f"TTS 合成失败: {e}",
+        ) from e
+    except ValueError as e:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=str(e),
+        ) from e
+
+    return TTSPreviewResponse(
+        audio_url=result.audio_url,
+        duration=result.duration if result.duration and result.duration > 0 else None,
+    )
+
+
 @router.websocket("/ws/tts/stream")
 async def tts_websocket_stream(
     websocket: WebSocket,

apps/api/app/schemas/generation_task.py

@@ -10,7 +10,7 @@ class ConfirmGenerationRequest(BaseModel):
     output_width: int = Field(default=1080, ge=100, description="输出视频宽度")
     output_height: int = Field(default=1920, ge=100, description="输出视频高度")
     cover_url: str = Field(default="", description="自定义封面图片 URL")
-    custom_title: str = Field(default="", description="自定义视频标题")
+    custom_title: str = Field(default="", description="用户自定义标题文本，非空时同步到任务和编辑计划")
 
 
 class CreateGenerationTaskRequest(BaseModel):
@@ -33,6 +33,11 @@ class CreateGenerationTaskRequest(BaseModel):
     voice_ids: list[str] = Field(default_factory=list)
     # ── 来源剪辑计划 ──
     source_edit_plan_id: str = ""
+    # ── 标题配置（结构化）──
+    title_config: dict | None = Field(
+        default=None,
+        description="标题样式对象，包含 text/font/font_size/font_color/position/bold/stroke/shadow 等。为空时不影响现有行为。",
+    )
     # ── 视频标题 ──
     video_title: str = Field(default="", description="生成视频的标题/名称，为空则使用默认命名")
     # ── 批量生成 ──
@@ -72,7 +77,6 @@ class CreateGenerationTaskRequest(BaseModel):
     output_width: int = Field(default=1280, description="输出视频宽度")
     output_height: int = Field(default=720, description="输出视频高度")
     cover_url: str = Field(default="", description="封面图片 URL")
-    custom_title: str = Field(default="", description="自定义视频标题")
 
     @model_validator(mode="after")
     def _check_at_least_one_mode(self) -> "CreateGenerationTaskRequest":
@@ -108,7 +112,7 @@ class GenerationTaskResponse(BaseModel):
     output_width: int = 1280
     output_height: int = 720
     cover_url: str = ""
-    custom_title: str = ""
+    title_config: dict = Field(default_factory=dict)
     status: str
     progress: float
     result_count: int

apps/api/app/schemas/tts.py

@@ -101,3 +101,19 @@ class SaveToLibraryResponse(BaseModel):
     voice_id: str
     voice_name: str
     status: str
+
+
+class TTSPreviewRequest(BaseModel):
+    """TTS 预览（试听）请求。"""
+
+    text: str = Field(..., min_length=1, max_length=200, description="合成文本，限制 200 字")
+    voice_id: str = Field(..., min_length=1, description="音色 ID")
+    speed: float = Field(1.0, ge=0.5, le=2.0, description="语速")
+    pitch: float = Field(1.0, ge=0.5, le=2.0, description="音调（预留，当前未使用）")
+
+
+class TTSPreviewResponse(BaseModel):
+    """TTS 预览（试听）响应。"""
+
+    audio_url: str = Field(..., description="合成音频 URL")
+    duration: Optional[float] = Field(default=None, description="音频时长（秒）")

apps/api/app/services/edit_plan_service.py

@@ -371,6 +371,88 @@ class EditPlanService:
         logger.info("删除所有片段: plan_id=%s count=%d", plan_id, count)
         return count
 
+    def replace_all_clips_transactional(
+        self,
+        plan_id: str,
+        clips_data: list[dict],
+    ) -> int:
+        """事务性地替换所有片段：清空→创建→标记ready，单事务保证原子性。
+
+        Args:
+            plan_id: 计划 ID
+            clips_data: 片段数据列表，每项包含 asset_id/start_time/duration/order
+
+        Returns:
+            int: 创建的片段数量
+
+        Raises:
+            Exception: 任何步骤失败时自动回滚
+        """
+        from packages.adapters.sqlalchemy_impl.models import EditPlanClipModel
+
+        db = self._clip_repo.session
+        try:
+            # 1. 清空现有 clips（不 commit）
+            deleted_count = db.query(EditPlanClipModel).filter(EditPlanClipModel.plan_id == plan_id).delete()
+
+            # 2. 批量创建新 clips（不 commit）
+            for i, clip_item in enumerate(clips_data):
+                order = clip_item.get("order") or i
+                clip = EditPlanClip.create(
+                    plan_id=plan_id,
+                    clip_type="main",
+                    order=order,
+                    asset_id=clip_item.get("asset_id", ""),
+                    start_time=clip_item.get("start_time", 0.0),
+                    duration=clip_item.get("duration", 0.0),
+                )
+                model = EditPlanClipModel(
+                    id=clip.id,
+                    plan_id=clip.plan_id,
+                    clip_type=clip.clip_type,
+                    order=clip.order,
+                    asset_id=clip.asset_id,
+                    text_content=clip.text_content,
+                    start_time=clip.start_time,
+                    duration=clip.duration,
+                    transition_effect=clip.transition_effect,
+                    transition_duration=clip.transition_duration,
+                    playback_speed=clip.playback_speed,
+                    status=clip.status.value,
+                    config=clip.config,
+                )
+                db.add(model)
+
+            # flush 让新建 clip 写入当前事务（未 commit），后续查询才能找到它们
+            db.flush()
+
+            # 3. 标记有 asset_id 的 clips 为 ready（不 commit）
+            pending_with_asset = (
+                db.query(EditPlanClipModel)
+                .filter(
+                    EditPlanClipModel.plan_id == plan_id,
+                    EditPlanClipModel.status == "pending",
+                    EditPlanClipModel.asset_id != "",
+                )
+                .all()
+            )
+            for m in pending_with_asset:
+                m.status = "ready"
+
+            # 4. 一次性提交
+            db.commit()
+            logger.info(
+                "事务性替换片段: plan_id=%s deleted=%d created=%d",
+                plan_id,
+                deleted_count,
+                len(clips_data),
+            )
+            return len(clips_data)
+        except Exception:
+            db.rollback()
+            logger.exception("事务性替换片段失败: plan_id=%s", plan_id)
+            raise
+
     # ── 片段分割与合并 ──────────────────────────────────────────────────────
 
     def split_clip(self, clip_id: str, split_time: float) -> Dict[str, Any]:

apps/web/e2e/core-generation.spec.ts

@@ -231,10 +231,7 @@ test.describe("Core generation flow", () => {
       (response) => {
         const url = response.url()
         const path = new URL(url).pathname
-        return (
+        return response.request().method() === "POST" && path.endsWith("/generation/tasks")
-          response.request().method() === "POST" &&
-          path.endsWith("/generation/tasks")
-        )
       },
       { timeout: 30_000 },
     )

apps/web/src/api/bgm/bgm.ts

@@ -4,11 +4,20 @@
 import apiClient from "../client"
 import type { BgmPreset, BgmPresetsQuery } from "./types"
 
-/** 获取 BGM 预设列表 */
+/**
-export const getBgmPresets = async (params?: BgmPresetsQuery): Promise<BgmPreset[]> => {
+ * 获取 BGM 预设列表
+ * @param templateId 模板/草稿 ID
+ * @param params 分类/关键词筛选
+ */
+export const getBgmPresets = async (
+  templateId: string,
+  params?: BgmPresetsQuery,
+): Promise<BgmPreset[]> => {
   const searchParams: Record<string, string> = {}
   if (params?.category) searchParams.category = params.category
   if (params?.keyword) searchParams.keyword = params.keyword
-  const res = await apiClient.get("/bgm/presets", { params: searchParams })
+  const res = await apiClient.get(`/templates/${templateId}/editor/bgm/presets`, {
+    params: searchParams,
+  })
   return res.data?.data ?? res.data ?? []
 }

apps/web/src/api/generation/cover.ts

@@ -1,9 +1,22 @@
 import apiClient from "../client"
 
+export interface GenerateCoverTitleConfig {
+  text?: string
+  font?: string
+  font_size?: number
+  font_color?: string
+  position?: string
+  bold?: boolean
+  stroke?: boolean
+  shadow?: boolean
+}
+
 export interface GenerateCoverRequest {
   asset_ids: string[]
   cover_type?: "ai_frame" | "manual" | "upload" | "ai_regenerate"
   frame_time?: number
+  /** 标题样式，用于在封面上叠加标题文字 */
+  title_config?: GenerateCoverTitleConfig
 }
 
 export interface GenerateCoverResponse {

apps/web/src/api/generation/types.ts

@@ -13,6 +13,10 @@ export interface CreatePreviewRequest {
   video_title?: string
   duration?: number
   video_ratio?: string
+  /** 输出视频宽度（与 video_ratio 匹配，如 9:16 → 1080） */
+  output_width?: number
+  /** 输出视频高度（与 video_ratio 匹配，如 9:16 → 1920） */
+  output_height?: number
   /* 标题烧录配置（可选，传入后 ASS 渲染标题到预览视频中） */
   title_config?: {
     text?: string
@@ -38,6 +42,8 @@ export interface CreatePreviewResponse {
   is_preview: boolean
   resolution: string
   created_at: string
+  /** 后端自动关联的编辑计划 ID（用于 fallback 路径传递 source_edit_plan_id） */
+  source_edit_plan_id?: string
 }
 
 /** 预览任务详情响应 */

apps/web/src/api/tasks/tasks.ts

@@ -6,6 +6,7 @@ import apiClient from "../client"
 import type {
   CreateGenerationTaskRequest,
   CreateGenerationTaskResponse,
+  GenerationTaskDetail,
   TaskItem,
   TaskListParams,
   TaskListResponse,
@@ -19,6 +20,12 @@ export const createGenerationTask = async (
   return data
 }
 
+/** 获取单个生成任务详情（轮询用） */
+export const getGenerationTask = async (taskId: string): Promise<GenerationTaskDetail> => {
+  const { data } = await apiClient.get<GenerationTaskDetail>(`/generation/tasks/${taskId}`)
+  return data
+}
+
 /** 获取任务列表（支持分页和筛选） */
 export const getTasks = async (params?: TaskListParams): Promise<TaskListResponse> => {
   const { data } = await apiClient.get<TaskListResponse>("/tasks", {

apps/web/src/api/tasks/types.ts

@@ -82,10 +82,20 @@ export interface CreateGenerationTaskRequest {
     stroke?: boolean
     shadow?: boolean
   }
+  /** 关联的草稿 ID（编辑流程数据链路用） */
+  source_edit_plan_id?: string
+  /** 配音素材库 ID（用户上传的音频或 AI 配音素材） */
+  voice_library_id?: string
+  /** 自定义 BGM 配置，覆盖模板 BGM 设置 */
+  bgm_config?: {
+    enabled: boolean
+    preset_id?: string
+    volume?: number
+  }
 }
 
-/** 创建生成任务响应（对齐后端 GenerationTaskResponse） */
+/** 单个生成任务详情（对齐后端 GenerationTaskResponse） */
-export interface CreateGenerationTaskResponse {
+export interface GenerationTaskDetail {
   id: string
   project_id: string
   asset_library_id: string
@@ -95,8 +105,18 @@ export interface CreateGenerationTaskResponse {
   asset_ids: string[]
   title_ids: string[]
   voice_ids: string[]
+  source_edit_plan_id?: string
   status: string
   progress: number
   result_count: number
   error_message: string
+  error_info?: TaskErrorInfo
+  created_at?: string | null
+  updated_at?: string | null
+}
+
+/** 创建生成任务响应（后端返回批量结构 {items, total}） */
+export interface CreateGenerationTaskResponse {
+  items: GenerationTaskDetail[]
+  total: number
 }

apps/web/src/api/template-editor/editPlans.ts

@@ -1,27 +1,8 @@
 /**
- * 模板草稿 CRUD + 生成相关 API
+ * 模板草稿 CRUD API
  */
 import apiClient from "../client"
-import type {
+import type { EditPlan, UpdateEditPlanRequest, GeneratedVideo } from "./types"
-  EditPlan,
-  EditPlanListParams,
-  EditPlanListResponse,
-  CreateEditPlanRequest,
-  UpdateEditPlanRequest,
-  GenerateResponse,
-  GenerationStatusResponse,
-  EditPlanGeneration,
-  GeneratedVideo,
-  CopyEditPlanRequest,
-} from "./types"
-
-/** 获取模板草稿列表（支持分页和筛选） */
-export async function getEditPlans(params?: EditPlanListParams): Promise<EditPlanListResponse> {
-  const response = await apiClient.get<EditPlanListResponse>("/templates/drafts", {
-    params,
-  })
-  return response.data
-}
 
 /** 获取单个模板草稿 */
 export async function getEditPlan(templateId: string): Promise<EditPlan> {
@@ -29,63 +10,44 @@ export async function getEditPlan(templateId: string): Promise<EditPlan> {
   return response.data
 }
 
-/** 创建模板草稿 */
+/** 更新模板草稿（支持传入 AbortSignal 用于自动保存竞态取消） */
-export async function createEditPlan(data: CreateEditPlanRequest): Promise<EditPlan> {
-  const response = await apiClient.post("/templates/drafts", data)
-  return response.data
-}
-
-/** 更新模板草稿 */
 export async function updateEditPlan(
   templateId: string,
   data: UpdateEditPlanRequest,
+  signal?: AbortSignal,
 ): Promise<EditPlan> {
-  const response = await apiClient.put(`/templates/${templateId}/editor`, data)
+  const response = await apiClient.put(`/templates/${templateId}/editor`, data, { signal })
   return response.data
 }
 
-/** 删除模板草稿 */
-export async function deleteEditPlan(templateId: string): Promise<void> {
-  await apiClient.delete(`/templates/${templateId}/editor`)
-}
-
-/** 触发生成 */
-export async function generateEditPlan(templateId: string): Promise<GenerateResponse> {
-  const response = await apiClient.post(`/templates/${templateId}/editor/generate`)
-  return response.data
-}
-
-/** 获取生成状态（轮询用） */
-export async function getGenerationStatus(templateId: string): Promise<GenerationStatusResponse> {
-  const response = await apiClient.get(`/templates/${templateId}/editor/generation-status`)
-  return response.data
-}
-
-/** 获取模板草稿关联的生成记录 */
-export async function getEditPlanGenerations(templateId: string): Promise<EditPlanGeneration[]> {
-  const response = await apiClient.get(`/templates/${templateId}/editor/generations`)
-  return response.data.items || []
-}
-
 /** 获取生成任务的视频结果列表 */
 export async function getGenerationTaskResults(taskId: string): Promise<GeneratedVideo[]> {
   const response = await apiClient.get(`/generation/tasks/${taskId}/results`)
   return response.data.items || response.data || []
 }
 
-/** 取消生成任务 */
+/** ── 草稿 clips 批量更新 ── */
-export async function cancelGeneration(templateId: string): Promise<void> {
+
-  await apiClient.post(`/templates/${templateId}/editor/cancel`)
+export interface EditPlanClipInput {
+  asset_id: string
+  start_time: number
+  duration: number
+  order: number
 }
 
-/** 复制模板草稿（含所有片段配置） */
+/**
-export async function copyEditPlan(
+ * 批量替换草稿的 clips（先全删再批量插入）
+ * 后端路由：PUT /templates/{template_id}/editor/clips
+ */
+export async function updateEditPlanClips(
   templateId: string,
-  data?: CopyEditPlanRequest,
+  clips: EditPlanClipInput[],
-): Promise<EditPlan> {
+  signal?: AbortSignal,
-  const response = await apiClient.post<EditPlan>(
+): Promise<{ count: number }> {
-    `/templates/${templateId}/editor/copy`,
+  const response = await apiClient.put(
-    data || {},
+    `/templates/${templateId}/editor/clips`,
+    { clips },
+    { signal },
   )
   return response.data
 }

apps/web/src/api/template-editor/index.ts

@@ -15,14 +15,8 @@ export type {
   EditPlanSegment,
   EditPlanConfig,
   EditPlan,
-  CreateEditPlanRequest,
   UpdateEditPlanRequest,
-  EditPlanListParams,
-  EditPlanListResponse,
-  GenerateResponse,
-  EditPlanGeneration,
   ClipStatusItem,
-  GenerationStatusResponse,
   GeneratedVideo,
   AIRecommendRequest,
   AIRecommendClipItem,
@@ -37,7 +31,6 @@ export type {
   ClipReorderResponse,
   ClipBatchDeleteResponse,
   ClipsFromAssetsResponse,
-  CopyEditPlanRequest,
   TransitionEffect,
   MediaAsset,
 } from "./types"
@@ -53,18 +46,12 @@ export {
 
 // 模板草稿 CRUD + 生成
 export {
-  getEditPlans,
   getEditPlan,
-  createEditPlan,
   updateEditPlan,
-  deleteEditPlan,
+  updateEditPlanClips,
-  generateEditPlan,
-  getGenerationStatus,
-  getEditPlanGenerations,
   getGenerationTaskResults,
-  cancelGeneration,
-  copyEditPlan,
 } from "./editPlans"
+export type { EditPlanClipInput } from "./editPlans"
 
 // 片段 CRUD + 批量操作
 export {

apps/web/src/api/template-editor/types.ts

@@ -118,6 +118,17 @@ export interface EditPlanConfig {
   generate_count?: number
   /** 素材模式 */
   material_mode?: string
+  /** 前端标题设置（Step4 自动保存，与 title_config 字段分离，不影响后端渲染） */
+  title?: {
+    text?: string
+    font?: string
+    font_size?: number
+    color?: string
+    position?: string
+    bold?: boolean
+    stroke?: boolean
+    shadow?: boolean
+  }
   /** 预览视频 URL（封面生成用） */
   rendered_storage_key?: string
   /** 生成任务 ID */
@@ -176,31 +187,6 @@ export interface EditPlanListResponse {
 
 /* ── 生成相关 ── */
 
-/** 生成响应 */
-export interface GenerateResponse {
-  plan_id: string
-  plan_status: EditPlanStatus
-  generation_task_id: string
-  clip_count: number
-}
-
-/** 模板草稿关联的生成记录 */
-export interface EditPlanGeneration {
-  id: string
-  source_edit_plan_id: string
-  template_id: string
-  asset_ids: string[]
-  status: EditPlanStatus
-  progress: number
-  result_count: number
-  error_message: string
-  error_info: Record<string, unknown>
-  logs: Array<Record<string, unknown>>
-  retry_count: number
-  created_at?: string
-  updated_at?: string
-}
-
 /** 片段生成状态 */
 export interface ClipStatusItem {
   clip_id: string
@@ -213,17 +199,6 @@ export interface ClipStatusItem {
   error_message?: string
 }
 
-/** 生成状态轮询响应 */
-export interface GenerationStatusResponse {
-  plan_id: string
-  plan_status: EditPlanStatus
-  generation_task_id?: string
-  error_message?: string
-  clips: ClipStatusItem[]
-  error?: string
-  message?: string
-}
-
 /** 生成视频详情 */
 export interface GeneratedVideo {
   id: string

apps/web/src/api/templates/index.ts

@@ -9,8 +9,6 @@ export type {
   TemplateSegment,
   TemplateListParams,
   TemplateListResponse,
-  GenerateFromTemplateRequest,
-  GenerateFromTemplateResponse,
   CopyTemplateResponse,
 } from "./types"
 
@@ -24,5 +22,4 @@ export {
   getTemplate,
   toggleFavoriteTemplate,
   copyTemplate,
-  generateFromTemplate,
 } from "./templates"

apps/web/src/api/templates/templates.ts

@@ -5,8 +5,6 @@
 import apiClient from "../client"
 import type {
   CopyTemplateResponse,
-  GenerateFromTemplateRequest,
-  GenerateFromTemplateResponse,
   TemplateItem,
   TemplateListParams,
   TemplateListResponse,
@@ -45,15 +43,3 @@ export const copyTemplate = async (templateId: string): Promise<CopyTemplateResp
   const response = await apiClient.post<CopyTemplateResponse>(`/templates/${templateId}/copy`)
   return response.data
 }
-
-/** 从模板生成 */
-export const generateFromTemplate = async (
-  templateId: string,
-  data?: GenerateFromTemplateRequest,
-): Promise<GenerateFromTemplateResponse> => {
-  const response = await apiClient.post<GenerateFromTemplateResponse>(
-    `/templates/${templateId}/generate`,
-    data,
-  )
-  return response.data
-}

apps/web/src/config/navigation.ts

@@ -71,7 +71,7 @@ export const NAV_ITEMS: NavItem[] = [
   },
   {
     key: "editing-planner",
-    label: "剪辑编辑器",
+    label: "剪辑模板",
     path: "/app/editing-planner",
     icon: React.createElement(EditOutlined),
   },
@@ -133,7 +133,7 @@ export const NAV_GROUPS: NavGroup[] = [
       },
       {
         key: "editing-planner",
-        label: "剪辑编辑器",
+        label: "剪辑模板",
         path: "/app/editing-planner",
         icon: React.createElement(EditOutlined),
       },

apps/web/src/pages/editing-planner/components/GenerationHistoryModal.tsx

@@ -1,116 +0,0 @@
-/**
- * 生成历史弹窗 — 展示当前模板草稿的生成任务记录
- * 从 EditingPlanner 拆分，避免主文件过大
- */
-import React from "react"
-import { CloseOutlined, InboxOutlined } from "@ant-design/icons"
-import type { EditPlanGeneration } from "@/api/template-editor"
-import { PLAN_STATUS_LABELS } from "@/api/template-editor"
-
-interface GenerationHistoryModalProps {
-  open: boolean
-  loading: boolean
-  history: EditPlanGeneration[]
-  onClose: () => void
-  onCancel?: (taskId: string) => void
-  cancelLoading?: boolean
-}
-
-const GenerationHistoryModal: React.FC<GenerationHistoryModalProps> = ({
-  open,
-  loading,
-  history,
-  onClose,
-  onCancel,
-  cancelLoading,
-}) => {
-  if (!open) return null
-
-  return (
-    <div className="ep-modal-overlay" onClick={onClose}>
-      <div className="ep-modal ep-gh-modal" onClick={(e) => e.stopPropagation()}>
-        <div className="ep-modal-header">
-          <h3>生成历史</h3>
-          <button className="ep-modal-close" onClick={onClose}>
-            <CloseOutlined />
-          </button>
-        </div>
-        <div className="ep-modal-body ep-gh-body">
-          {loading ? (
-            <div className="ep-gh-empty">
-              <div className="ep-skeleton">
-                <div className="ep-skeleton-item ep-skeleton-item--header" />
-                <div className="ep-skeleton-item" />
-                <div className="ep-skeleton-item" />
-                <div className="ep-skeleton-item" />
-              </div>
-            </div>
-          ) : history.length === 0 ? (
-            <div className="ep-gh-empty">
-              <InboxOutlined style={{ fontSize: 32, opacity: 0.4 }} />
-              <span>暂无生成记录</span>
-            </div>
-          ) : (
-            <table className="ep-gh-table">
-              <thead>
-                <tr className="ep-gh-table-header-row">
-                  <th className="ep-gh-th">任务ID</th>
-                  <th className="ep-gh-th">状态</th>
-                  <th className="ep-gh-th">创建时间</th>
-                  <th className="ep-gh-th">更新时间</th>
-                  {onCancel && <th className="ep-gh-th">操作</th>}
-                </tr>
-              </thead>
-              <tbody>
-                {history.map((gen) => {
-                  const statusClass = `ep-gh-status-tag--${gen.status}`
-                  const canCancel = gen.status === "rendering" || gen.status === "editing"
-                  return (
-                    <tr key={gen.id} className="ep-gh-table-row">
-                      <td className="ep-gh-td ep-gh-td-id">
-                        {gen.id ? `${gen.id.slice(0, 8)}...` : "—"}
-                      </td>
-                      <td className="ep-gh-td">
-                        <span className={`ep-gh-status-tag ${statusClass}`}>
-                          {PLAN_STATUS_LABELS[gen.status] || gen.status}
-                        </span>
-                      </td>
-                      <td className="ep-gh-td ep-gh-td-time">
-                        {gen.created_at ? new Date(gen.created_at).toLocaleString("zh-CN") : "—"}
-                      </td>
-                      <td className="ep-gh-td ep-gh-td-time">
-                        {gen.updated_at ? new Date(gen.updated_at).toLocaleString("zh-CN") : "—"}
-                      </td>
-                      {onCancel && (
-                        <td className="ep-gh-td ep-gh-td-action">
-                          {canCancel ? (
-                            <button
-                              className="ep-gh-cancel-btn"
-                              onClick={() => onCancel(gen.id)}
-                              disabled={cancelLoading}
-                            >
-                              取消
-                            </button>
-                          ) : (
-                            <span className="ep-gh-action-placeholder">—</span>
-                          )}
-                        </td>
-                      )}
-                    </tr>
-                  )
-                })}
-              </tbody>
-            </table>
-          )}
-        </div>
-        <div className="ep-modal-footer">
-          <button className="ep-btn ep-btn-secondary" onClick={onClose}>
-            关闭
-          </button>
-        </div>
-      </div>
-    </div>
-  )
-}
-
-export default GenerationHistoryModal

apps/web/src/pages/editing-planner/components/GenerationProgressModal.tsx

@@ -1,6 +0,0 @@
-/**
- * 生成进度弹窗 — 入口文件（向后兼容）
- * 实际实现已移至 ./generation-progress-modal/ 目录
- */
-export { default } from "./generation-progress-modal"
-export type { GenPhase, GenerationProgressModalProps } from "./generation-progress-modal"

apps/web/src/pages/editing-planner/components/bgm-selector/index.tsx

@@ -16,9 +16,17 @@ interface BgmSelectorProps {
   onClose: () => void
   config: BgmMixConfig
   onChange: (config: BgmMixConfig) => void
+  /** 模板/草稿 ID，用于请求 BGM 预设 */
+  templateId?: string
 }
 
-const BgmSelector: React.FC<BgmSelectorProps> = ({ open, onClose, config, onChange }) => {
+const BgmSelector: React.FC<BgmSelectorProps> = ({
+  open,
+  onClose,
+  config,
+  onChange,
+  templateId,
+}) => {
   const {
     presets,
     loading,
@@ -30,7 +38,7 @@ const BgmSelector: React.FC<BgmSelectorProps> = ({ open, onClose, config, onChan
     loadPresets,
     handlePreview,
     stopPreview,
-  } = useBgmSelector(open)
+  } = useBgmSelector(open, templateId)
 
   /* ── 选中 BGM ── */
   const handleSelect = useCallback(

apps/web/src/pages/editing-planner/components/bgm-selector/useBgmSelector.ts

@@ -19,7 +19,7 @@ export const CATEGORY_LIST: {
  * BGM 选择器数据与交互 Hook
  * 封装列表加载、搜索、分类筛选、试听播放逻辑
  */
-export function useBgmSelector(open: boolean) {
+export function useBgmSelector(open: boolean, templateId?: string) {
   const [presets, setPresets] = useState<BgmPreset[]>([])
   const [loading, setLoading] = useState(false)
   const [activeCategory, setActiveCategory] = useState<BgmCategory | "all">("all")
@@ -30,19 +30,23 @@ export function useBgmSelector(open: boolean) {
 
   /* ── 加载 BGM 列表 ── */
   const loadPresets = useCallback(async () => {
+    if (!templateId) {
+      setPresets([])
+      return
+    }
     setLoading(true)
     try {
       const params: { category?: string; keyword?: string } = {}
       if (activeCategory !== "all") params.category = activeCategory
       if (keyword.trim()) params.keyword = keyword.trim()
-      const data = await getBgmPresets(params)
+      const data = await getBgmPresets(templateId, params)
       setPresets(data)
     } catch {
       message.error("加载 BGM 列表失败")
     } finally {
       setLoading(false)
     }
-  }, [activeCategory, keyword])
+  }, [activeCategory, keyword, templateId])
 
   useEffect(() => {
     if (open) loadPresets()

apps/web/src/pages/editing-planner/components/generation-progress-modal/ProgressPhase.tsx

@@ -1,65 +0,0 @@
-import React from "react"
-import { Modal } from "@/components/ui"
-import type { TaskItem } from "@/api/tasks"
-import { getStepLabel, getStatusColor } from "./constants"
-
-interface ProgressPhaseProps {
-  open: boolean
-  task: TaskItem | null
-  onCancel: () => void
-}
-
-/** progress（进度轮询）阶段弹窗 */
-export const ProgressPhase: React.FC<ProgressPhaseProps> = ({ open, task, onCancel }) => {
-  const progress = task?.progress ?? 0
-  const status = task?.status ?? ""
-  const currentStep = task?.current_step ?? ""
-  const userMessage = task?.user_message ?? ""
-  const stepColor = getStatusColor(status, currentStep)
-
-  return (
-    <Modal open={open} title="视频生成中" footer={null} onCancel={onCancel} closable width={480}>
-      <div className="ep-gen-progress">
-        {/* 进度环 */}
-        <div className="ep-gen-progress-ring-wrap">
-          <svg className="ep-gen-progress-ring" viewBox="0 0 120 120">
-            <circle className="ep-gen-progress-ring-bg" cx="60" cy="60" r="52" />
-            <circle
-              className="ep-gen-progress-ring-fill"
-              cx="60"
-              cy="60"
-              r="52"
-              style={{
-                strokeDasharray: `${2 * Math.PI * 52}`,
-                strokeDashoffset: `${2 * Math.PI * 52 * (1 - progress / 100)}`,
-                stroke: stepColor,
-              }}
-            />
-          </svg>
-          <span className="ep-gen-progress-pct" style={{ color: stepColor }}>
-            {progress}%
-          </span>
-        </div>
-
-        {/* 当前步骤 */}
-        <div className="ep-gen-step-text">
-          {userMessage || getStepLabel(currentStep) || "处理中…"}
-        </div>
-
-        {/* 进度条 */}
-        <div className="ep-gen-progress-bar">
-          <div
-            className="ep-gen-progress-bar-fill"
-            style={{
-              width: `${progress}%`,
-              backgroundColor: stepColor,
-            }}
-          />
-        </div>
-
-        {/* 任务 ID */}
-        {task?.id && <div className="ep-gen-task-id">任务 ID: {task.id}</div>}
-      </div>
-    </Modal>
-  )
-}

apps/web/src/pages/editing-planner/components/generation-progress-modal/ResultPhase.tsx

@@ -1,82 +0,0 @@
-import React from "react"
-import { Modal, Button } from "@/components/ui"
-import type { TaskItem } from "@/api/tasks"
-
-interface ResultPhaseProps {
-  open: boolean
-  phase: "completed" | "failed"
-  task: TaskItem | null
-  onCancel: () => void
-  onRetry?: () => void
-  onClose?: () => void
-}
-
-/** completed / failed（结果）阶段弹窗 */
-export const ResultPhase: React.FC<ResultPhaseProps> = ({
-  open,
-  phase,
-  task,
-  onCancel,
-  onRetry,
-  onClose,
-}) => {
-  const userMessage = task?.user_message ?? ""
-  const errorMessage = task?.error_message ?? ""
-  const retryable = task?.retryable ?? false
-  const handleClose = onClose || onCancel
-
-  if (phase === "completed") {
-    return (
-      <Modal
-        open={open}
-        title="✅ 生成完成"
-        footer={null}
-        onCancel={handleClose}
-        closable
-        width={440}
-      >
-        <div className="ep-gen-result">
-          <div className="ep-gen-result-icon">🎉</div>
-          <div className="ep-gen-result-title">视频生成完成！</div>
-          {userMessage && <div className="ep-gen-result-msg">{userMessage}</div>}
-          <div className="ep-gen-result-actions">
-            <Button buttonType="primary" onClick={handleClose}>
-              查看结果
-            </Button>
-          </div>
-        </div>
-      </Modal>
-    )
-  }
-
-  return (
-    <Modal
-      open={open}
-      title="❌ 生成失败"
-      footer={null}
-      onCancel={handleClose}
-      closable
-      width={440}
-    >
-      <div className="ep-gen-result ep-gen-result--error">
-        <div className="ep-gen-result-icon">😥</div>
-        <div className="ep-gen-result-title">视频生成失败</div>
-        {(errorMessage || userMessage) && (
-          <div className="ep-gen-result-msg ep-gen-result-msg--error">
-            {errorMessage || userMessage}
-          </div>
-        )}
-        <div className="ep-gen-result-actions">
-          {retryable && onRetry && (
-            <Button buttonType="primary" onClick={onRetry}>
-              🔄 重试
-            </Button>
-          )}
-          <Button buttonType="secondary" onClick={handleClose}>
-            关闭
-          </Button>
-        </div>
-      </div>
-    </Modal>
-  )
-}

apps/web/src/pages/editing-planner/components/generation-progress-modal/SetupPhase.tsx

@@ -1,53 +0,0 @@
-import React from "react"
-import { Modal } from "@/components/ui"
-
-interface SetupPhaseProps {
-  open: boolean
-  voiceoverDuration: number | null
-  estimatedDuration: number
-  submitting: boolean
-  onDurationChange: (v: number | null) => void
-  onGenerate: () => void
-  onCancel: () => void
-}
-
-/** setup（配置）阶段弹窗 */
-export const SetupPhase: React.FC<SetupPhaseProps> = ({
-  open,
-  voiceoverDuration,
-  estimatedDuration,
-  submitting,
-  onDurationChange,
-  onGenerate,
-  onCancel,
-}) => (
-  <Modal
-    open={open}
-    title="使用模板生成视频"
-    confirmLoading={submitting}
-    onOk={onGenerate}
-    onCancel={onCancel}
-    okText="开始生成"
-    cancelText="取消"
-    width={440}
-  >
-    <div className="ep-gen-setup">
-      <label className="ep-gen-field-label">配音时长（秒）</label>
-      <input
-        type="number"
-        className="ep-gen-duration-input"
-        placeholder="请输入配音时长"
-        value={voiceoverDuration ?? ""}
-        onChange={(e) => {
-          const v = e.target.value ? Number(e.target.value) : null
-          onDurationChange(v)
-        }}
-        min={1}
-        max={600}
-      />
-      <div className="ep-gen-estimate">
-        预估总时长：<strong>{estimatedDuration}s</strong>
-      </div>
-    </div>
-  </Modal>
-)

apps/web/src/pages/editing-planner/components/generation-progress-modal/constants.ts

@@ -1,31 +0,0 @@
-/* ──────────── 步骤文案映射 ──────────── */
-
-export const STEP_LABELS: Record<string, string> = {
-  queued: "排队中…",
-  preparing: "准备素材…",
-  generating_video: "渲染视频中…",
-  adding_effects: "添加特效…",
-  composing: "合成中…",
-  encoding: "编码输出中…",
-  completed: "生成完成！",
-  failed: "生成失败",
-}
-
-export const getStepLabel = (step: string) => STEP_LABELS[step] || step.replace(/_/g, " ")
-
-/* ──────────── 状态徽标颜色 ──────────── */
-
-export const STATUS_COLOR: Record<string, string> = {
-  queued: "#6b7280",
-  pending: "#6b7280",
-  preparing: "#f59e0b",
-  generating_video: "#4f46e5",
-  adding_effects: "#7c3aed",
-  composing: "#2563eb",
-  encoding: "#0891b2",
-  completed: "#10b981",
-  failed: "#ef4444",
-}
-
-export const getStatusColor = (status: string, currentStep: string) =>
-  STATUS_COLOR[status] || STATUS_COLOR[currentStep] || "#4f46e5"

apps/web/src/pages/editing-planner/components/generation-progress-modal/index.tsx

@@ -1,70 +0,0 @@
-/**
- * 生成进度弹窗 — 任务 2.17
- * 三阶段 UI：setup（配置）→ progress（进度轮询）→ completed / failed（结果）
- * V21 设计系统，CSS 类名前缀 ep-gen-
- */
-import React, { useEffect, useRef } from "react"
-import type { GenPhase, GenerationProgressModalProps } from "./types"
-import { SetupPhase } from "./SetupPhase"
-import { ProgressPhase } from "./ProgressPhase"
-import { ResultPhase } from "./ResultPhase"
-
-/* 重新导出类型，保持向后兼容 */
-export type { GenPhase, GenerationProgressModalProps }
-
-const GenerationProgressModal: React.FC<GenerationProgressModalProps> = ({
-  open,
-  phase,
-  voiceoverDuration,
-  estimatedDuration,
-  onDurationChange,
-  onGenerate,
-  task,
-  submitting,
-  onCancel,
-  onRetry,
-  onClose,
-}) => {
-  /* 关闭弹窗时重置（避免下次打开残留旧状态） */
-  const prevOpen = useRef(false)
-  useEffect(() => {
-    if (prevOpen.current && !open) {
-      /* modal just closed — parent handles reset */
-    }
-    prevOpen.current = open
-  }, [open])
-
-  /* setup 阶段 */
-  if (phase === "setup") {
-    return (
-      <SetupPhase
-        open={open}
-        voiceoverDuration={voiceoverDuration}
-        estimatedDuration={estimatedDuration}
-        submitting={submitting}
-        onDurationChange={onDurationChange}
-        onGenerate={onGenerate}
-        onCancel={onCancel}
-      />
-    )
-  }
-
-  /* progress 阶段 */
-  if (phase === "progress") {
-    return <ProgressPhase open={open} task={task} onCancel={onCancel} />
-  }
-
-  /* completed / failed 阶段 */
-  return (
-    <ResultPhase
-      open={open}
-      phase={phase as "completed" | "failed"}
-      task={task}
-      onCancel={onCancel}
-      onRetry={onRetry}
-      onClose={onClose}
-    />
-  )
-}
-
-export default GenerationProgressModal

apps/web/src/pages/editing-planner/components/generation-progress-modal/types.ts

@@ -1,23 +0,0 @@
-import type { TaskItem } from "@/api/tasks"
-
-export type GenPhase = "setup" | "progress" | "completed" | "failed"
-
-export interface GenerationProgressModalProps {
-  open: boolean
-  phase: GenPhase
-
-  /* setup 阶段 */
-  voiceoverDuration: number | null
-  estimatedDuration: number
-  onDurationChange: (v: number | null) => void
-  onGenerate: () => void
-
-  /* progress / 结果阶段 */
-  task: TaskItem | null
-
-  /* 通用 */
-  submitting: boolean
-  onCancel: () => void
-  onRetry?: () => void
-  onClose?: () => void
-}

apps/web/src/pages/generate/GeneratePage.tsx

@@ -1,21 +1,19 @@
 /**
- * 智能剪辑页面 — V24 前端预览播放器架构改造
+ * 智能剪辑页面 — 前端实时预览架构
  * 7 步向导：选择模板 → 素材 → 配音 → 标题 → 预览 → 封面 → 确认生成
  * 左右布局：左侧 generate-form + 右侧 generate-preview
  *
- * 架构改造：
+ * 架构：
- * - Step5 预览改为前端素材切片播放（FrontendPreviewPlayer）
+ * - Step4+ 右侧预览面板使用 FrontendPreviewPlayer 实时播放素材片段
- * - 完全去除后端 FFmpeg 预览依赖
+ * - 标题样式编辑时 CSS 层实时叠加预览，所见即所得
- * - 标题样式通过 CSS 层实时叠加，所见即所得
+ * - 点"确认生成"时调用 createGenerationTask 创建一次服务器渲染任务
- * - 最终成片仍走后端 FFmpeg 渲染（Step7 确认生成）
  */
-import React, { useMemo } from "react"
+import React, { useMemo, useState, useEffect, useRef } from "react"
 import { Modal, message } from "antd"
 import { useNavigate } from "react-router-dom"
 import type { VoiceClone } from "@/api/voice-clone"
 import { useQuery } from "@tanstack/react-query"
 import { useCloneProgress } from "@/hooks/useCloneProgress"
-import { getAssetsByKind } from "@/api/assets"
 import CloneModal from "@/components/voice/CloneModal"
 import GenerateHeader from "./components/GenerateHeader"
 import {
@@ -24,7 +22,7 @@ import {
 } from "./utils/calculateTotalVideoDuration"
 import GenerateStepsBar from "./components/GenerateStepsBar"
 import GenerateResultPanel from "./components/GenerateResultPanel"
-import PreviewVideoPanel from "./components/PreviewVideoPanel"
+import FrontendPreviewPlayer from "./components/FrontendPreviewPlayer"
 import GenerateStepContent from "./components/GenerateStepContent"
 import GenerateStepActions from "./components/GenerateStepActions"
 import { useGenerateFormState } from "./hooks/useGenerateFormState"
@@ -32,6 +30,8 @@ import { useStepNavigation } from "./hooks/useStepNavigation"
 import { useGenerateVideo } from "./hooks/useGenerateVideo"
 import { usePreviewAssets } from "./hooks/usePreviewAssets"
 import { useTitleStyleUpdaters } from "./hooks/useStep4Title/useTitleStyleUpdaters"
+import { getAssetsByKind } from "@/api/assets"
+import { previewTts } from "@/api/tts"
 import "./generate.css"
 
 const GeneratePage: React.FC = () => {
@@ -72,18 +72,76 @@ const GeneratePage: React.FC = () => {
     autoSubtitles,
     bgm,
     editPlanId,
+    sourceEditPlanId,
     previewVideo,
     setPreviewVideo,
     previewModalOpen,
     setPreviewModalOpen,
+    previewTaskId,
+    setPreviewTaskId,
+    storedSourceEditPlanId,
+    setStoredSourceEditPlanId,
   } = formState
 
-  /* ── 标题样式回调（Step5 样式面板 + 右侧预览 CSS 层共用） ── */
+  /* ── 标题样式回调 ── */
   const styleUpdaters = useTitleStyleUpdaters({
     titleSettings,
     onTitleSettingsChange: setTitleSettings,
   })
 
+  /* ── 配音预览音频（TTS 试听）── */
+  const { data: voiceMaterials = [] } = useQuery({
+    queryKey: ["assets", "voice"],
+    queryFn: () => getAssetsByKind("voice", { limit: 50 }),
+  })
+
+  const [previewVoiceAudioUrl, setPreviewVoiceAudioUrl] = useState<string | null>(null)
+  const ttsAbortRef = useRef<AbortController | null>(null)
+
+  useEffect(() => {
+    // 如果 selectedVoice 是已上传的配音素材，直接用 file_url
+    const voiceAsset = voiceMaterials.find((m) => m.id === selectedVoice)
+    if (voiceAsset?.file_url) {
+      setPreviewVoiceAudioUrl(voiceAsset.file_url)
+      return
+    }
+
+    // 没有选中的 voice 或标题，跳过
+    const voiceId = selectedClonedVoice || selectedVoice
+    if (!voiceId || !titleSettings.title) {
+      setPreviewVoiceAudioUrl(null)
+      return
+    }
+
+    // 预设音色 / 克隆音色 → 调 TTS 合成
+    ttsAbortRef.current?.abort()
+    const controller = new AbortController()
+    ttsAbortRef.current = controller
+    let cancelled = false
+
+    previewTts({
+      text: titleSettings.title,
+      voice_id: voiceId,
+    })
+      .then((res) => {
+        if (!cancelled && res.audio_url) {
+          setPreviewVoiceAudioUrl(res.audio_url)
+        }
+      })
+      .catch((err) => {
+        if (!cancelled) {
+          console.warn("[预览配音生成失败]", err)
+          setPreviewVoiceAudioUrl(null)
+        }
+      })
+
+    return () => {
+      cancelled = true
+      controller.abort()
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [selectedVoice, selectedClonedVoice, titleSettings.title, voiceMaterials])
+
   /* ── 克隆声音 ── */
   const { clones: clonedVoices, addClone, hasProcessing } = useCloneProgress()
 
@@ -93,44 +151,38 @@ const GeneratePage: React.FC = () => {
     message.success("音色克隆成功！")
   }
 
-  /* ── 前端预览：加载选中素材的视频文件信息 ── */
+  /* ── 素材 ID 列表 ── */
   const previewAssetIds = useMemo(
     () => (materialMode === "auto" ? smartSelectedIds : selectedMaterials),
     [materialMode, smartSelectedIds, selectedMaterials],
   )
-  const previewAssetsEnabled = currentStep >= 4 && previewAssetIds.length > 0
-  const {
-    assets: previewAssets,
-    loading: previewAssetsLoading,
-    ready: previewAssetsReady,
-  } = usePreviewAssets(previewAssetIds, previewAssetsEnabled)
 
-  /* ── 当前模板对象（传给前端预览播放器） ── */
+  /* ── 当前模板对象 ── */
   const currentTemplate = useMemo(
     () => userTemplates.find((t) => t.id === selectedTemplate) || null,
     [userTemplates, selectedTemplate],
   )
 
-  /* ── 视频总时长计算（用于配音时长校验） ── */
+  /* ── BGM 配置 ── */
+  const bgmConfig = useMemo(
+    () => ({
+      enabled: bgm,
+      music_id: currentTemplate?.bgm_config?.music_id || "",
+    }),
+    [bgm, currentTemplate],
+  )
+
+  /* ── 加载素材详情（供前端预览播放器使用 + 配音时长校验） ── */
+  const previewAssetsEnabled = previewAssetIds.length > 0
+  const { assets: previewAssets } = usePreviewAssets(previewAssetIds, previewAssetsEnabled)
+
+  /* ── 视频总时长计算 ── */
   const totalVideoDuration = useMemo(() => {
-    // 优先用素材精确时长；素材未加载时用模板 segments 的 duration_max 之和估算
     const exact = calculateTotalVideoDuration(previewAssets, currentTemplate ?? undefined)
     if (exact > 0) return exact
     return estimateTotalVideoDuration(currentTemplate ?? undefined)
   }, [previewAssets, currentTemplate])
 
-  /* ── 配音音频 URL ── */
-  const { data: voiceMaterials = [] } = useQuery({
-    queryKey: ["assets", "voice"],
-    queryFn: () => getAssetsByKind("voice", { limit: 50 }),
-  })
-
-  const voiceAudioUrl = useMemo(() => {
-    if (!selectedVoice) return undefined
-    const asset = voiceMaterials.find((v) => v.id === selectedVoice)
-    return asset?.file_url || undefined
-  }, [selectedVoice, voiceMaterials])
-
   /* ── 步骤导航 ── */
   const { goNext, goPrev } = useStepNavigation({
     currentStep,
@@ -140,7 +192,6 @@ const GeneratePage: React.FC = () => {
     selectedMaterials,
     smartSelectedIds,
     titleSettings,
-    previewReady: previewAssetsReady,
   })
 
   /* ── 视频生成核心逻辑 ── */
@@ -171,21 +222,25 @@ const GeneratePage: React.FC = () => {
     autoSubtitles,
     bgm,
     generateCount,
+    sourceEditPlanId: storedSourceEditPlanId || sourceEditPlanId,
+    previewTaskId,
+    bgmConfig,
+    onGenerationSuccess: () => {
+      setPreviewTaskId(null)
+      setStoredSourceEditPlanId(null)
+    },
   })
 
   /* ================================================================
-     渲染 — 主页面
+     渲染
      ================================================================ */
 
   return (
     <div className="xx-generate-page">
-      {/* ── 页头 ── */}
       <GenerateHeader fromEditPlan={!!editPlanId} />
 
-      {/* ── 步骤条 ── */}
       <GenerateStepsBar currentStep={currentStep} onStepClick={setCurrentStep} />
 
-      {/* ── 主布局 ── */}
       <div className="xx-generate-layout">
         {/* ════ 左侧：表单区 ════ */}
         <div className="xx-generate-form">
@@ -202,7 +257,6 @@ const GeneratePage: React.FC = () => {
             onSmartSelectedIdsChange={setSmartSelectedIds}
             titleSettings={titleSettings}
             onTitleSettingsChange={setTitleSettings}
-            /* 标题样式回调 */
             onUpdatePosition={styleUpdaters.updatePosition}
             onUpdateFont={styleUpdaters.updateFont}
             onUpdateSize={styleUpdaters.updateSize}
@@ -213,6 +267,10 @@ const GeneratePage: React.FC = () => {
             onApplyPreset={styleUpdaters.applyPreset}
             activePreset={styleUpdaters.activePreset}
             titlePresets={styleUpdaters.titlePresets}
+            onPreviewTaskCreated={setPreviewTaskId}
+            onSourceEditPlanIdExtracted={setStoredSourceEditPlanId}
+            bgm={bgm}
+            bgmConfig={bgmConfig}
             coverSettings={coverSettings}
             onCoverSettingsChange={setCoverSettings}
             duration={duration}
@@ -251,18 +309,26 @@ const GeneratePage: React.FC = () => {
           />
         </div>
 
-        {/* ════ 右侧：预览 + 生成结果 ════ */}
+        {/* ════ 右侧：预览 + 结果 ════ */}
         <div className="xx-generate-right-col">
-          {/* 预览视频面板（Step4+ 显示，含 CSS 标题实时预览层） */}
+          {currentStep >= 4 && !!currentTemplate && (
-          {currentStep >= 4 && (
+            <FrontendPreviewPlayer
-            <PreviewVideoPanel
               assets={previewAssets}
               template={currentTemplate}
               videoRatio={videoRatio}
-              assetsReady={previewAssetsReady}
+              ready={previewAssets.length > 0}
-              assetsLoading={previewAssetsLoading}
+              voiceAudioUrl={previewVoiceAudioUrl || undefined}
-              titleSettings={titleSettings}
+              titleSettings={{
-              voiceAudioUrl={voiceAudioUrl}
+                title: titleSettings.title,
+                size: titleSettings.size,
+                font: titleSettings.font,
+                color: titleSettings.color,
+                position: titleSettings.position as "top" | "center" | "bottom",
+                bold: titleSettings.bold,
+                italic: titleSettings.italic,
+                stroke: titleSettings.stroke,
+                shadow: titleSettings.shadow,
+              }}
             />
           )}
           {currentStep >= 6 && (
@@ -284,7 +350,7 @@ const GeneratePage: React.FC = () => {
         </div>
       </div>
 
-      {/* ── 视频预览弹窗 ── */}
+      {/* 视频预览弹窗 */}
       <Modal
         className="xx-preview-modal"
         open={previewModalOpen}
@@ -307,7 +373,7 @@ const GeneratePage: React.FC = () => {
         )}
       </Modal>
 
-      {/* ── 音色克隆弹窗 ── */}
+      {/* 音色克隆弹窗 */}
       <CloneModal
         open={cloneModalOpen}
         onClose={() => setCloneModalOpen(false)}

apps/web/src/pages/generate/components/FrontendPreviewPlayer.tsx

@@ -17,7 +17,7 @@ import {
 import type { AssetItem } from "@/api/assets"
 import type { EditingTemplate } from "@/api/editing-planner"
 import { useSegmentScheduler, type PlaybackSegment } from "../hooks/useSegmentScheduler"
-import { useCanvasPlayer, isWebCodecsSupported } from "../hooks/useCanvasPlayer"
+import { useCanvasPlayer } from "../hooks/useCanvasPlayer"
 
 interface FrontendPreviewPlayerProps {
   assets: AssetItem[]
@@ -82,7 +82,9 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
   titleSettings,
 }) => {
   const segments = useMemo(() => buildPlaybackSegments(assets, template), [assets, template])
-  const useWebCodecs = isWebCodecsSupported()
+  // 默认走原生 video 播放（浏览器硬件解码，独立线程，不阻塞 UI）
+  // WebCodecs 仅在明确需要时启用（保留代码作为兜底）
+  const useWebCodecs = false
 
   // ── 两条路径共用同一个 canvas ref（fallback 路径不使用） ──
   const canvasRef = useRef<HTMLCanvasElement>(null)
@@ -112,12 +114,30 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
     [segments],
   )
 
+  // WebCodecs 解码失败后强制走 video fallback
+  const [forceVideoFallback, setForceVideoFallback] = useState(false)
+
+  const handleCanvasError = useCallback((err: Error) => {
+    console.error("[FrontendPreviewPlayer] Canvas decode Error, switching to video fallback:", err)
+    setForceVideoFallback(true)
+  }, [])
+
   const { state: canvasState, controls: canvasControls } = useCanvasPlayer(
     canvasRef,
-    canvasSegments,
+    useWebCodecs && !forceVideoFallback ? canvasSegments : [],
-    useWebCodecs ? canvasTitle : undefined,
+    useWebCodecs && !forceVideoFallback ? canvasTitle : undefined,
+    handleCanvasError,
+    useWebCodecs && !forceVideoFallback,
   )
 
+  // WebCodecs 报告解码失败时自动切换到 video fallback
+  useEffect(() => {
+    if (canvasState.hasDecodeError && !forceVideoFallback) {
+      console.warn("[FrontendPreviewPlayer] hasDecodeError detected, forcing video fallback")
+      setForceVideoFallback(true)
+    }
+  }, [canvasState.hasDecodeError, forceVideoFallback])
+
   // ── Video 播放器（fallback 路径） ──
   const {
     isPlaying: videoIsPlaying,
@@ -130,12 +150,13 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
     videoRefs,
   } = useSegmentScheduler(segments)
 
-  // 选择哪条路径的状态
+  // 选择哪条路径的状态（WebCodecs 解码失败时强制走 video fallback）
-  const isPlaying = useWebCodecs ? canvasState.isPlaying : videoIsPlaying
+  const effectiveUseWebCodecs = useWebCodecs && !forceVideoFallback
-  const currentTime = useWebCodecs ? canvasState.currentTime : videoCurrentTime
+  const isPlaying = effectiveUseWebCodecs ? canvasState.isPlaying : videoIsPlaying
-  const totalDuration = useWebCodecs ? canvasState.duration : videoTotalDuration
+  const currentTime = effectiveUseWebCodecs ? canvasState.currentTime : videoCurrentTime
-  const canPlay = useWebCodecs ? canvasState.isReady : videoCanPlay
+  const totalDuration = effectiveUseWebCodecs ? canvasState.duration : videoTotalDuration
-  const isBuffering = useWebCodecs ? canvasState.isBuffering : false
+  const canPlay = effectiveUseWebCodecs ? canvasState.isReady : videoCanPlay
+  const isBuffering = effectiveUseWebCodecs ? canvasState.isBuffering : false
 
   // ── 配音音频同步 ──
   const audioRef = useRef<HTMLAudioElement | null>(null)
@@ -172,16 +193,18 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
   }, [isPlaying, currentTime])
 
   // 片段切换时同步音频（仅 fallback 路径需要）
-  const segmentSyncKey = useWebCodecs ? -1 : videoCurrentSegIdx
+  const segmentSyncKey = effectiveUseWebCodecs ? -1 : videoCurrentSegIdx
   useEffect(() => {
     const audio = audioRef.current
     if (!audio || !audio.src || !isPlaying) return
     audio.currentTime = currentTime
-  }, [segmentSyncKey, isPlaying, currentTime])
+    // 注意：不要把 currentTime 放进依赖数组，否则每200ms会重置音频位置导致卡顿
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [segmentSyncKey, isPlaying])
 
   const handleSeekTo = useCallback(
     (time: number) => {
-      if (useWebCodecs) {
+      if (effectiveUseWebCodecs) {
         canvasControls.seek(time)
       } else {
         videoSeekTo(time)
@@ -191,11 +214,11 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
         audio.currentTime = time
       }
     },
-    [useWebCodecs, canvasControls, videoSeekTo],
+    [effectiveUseWebCodecs, canvasControls, videoSeekTo],
   )
 
   const handleTogglePlay = useCallback(() => {
-    if (useWebCodecs) {
+    if (effectiveUseWebCodecs) {
       if (canvasState.isPlaying) {
         canvasControls.pause()
       } else {
@@ -204,7 +227,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
     } else {
       videoTogglePlayPause()
     }
-  }, [useWebCodecs, canvasState.isPlaying, canvasControls, videoTogglePlayPause])
+  }, [effectiveUseWebCodecs, canvasState.isPlaying, canvasControls, videoTogglePlayPause])
 
   // ── 进度条拖拽 ──
   const [isDragging, setIsDragging] = useState(false)
@@ -247,82 +270,102 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
 
   const progressPercent = totalDuration > 0 ? (currentTime / totalDuration) * 100 : 0
 
-  // ── Canvas ResizeObserver ──
+  // ── Canvas 容器 ref（保留声明，WebCodecs 兜底路径仍引用） ──
   const canvasContainerRef = useRef<HTMLDivElement>(null)
-  useEffect(() => {
-    if (!useWebCodecs || !canPlay) return
-    const container = canvasContainerRef.current
-    const canvas = canvasRef.current
-    if (!container || !canvas) return
-    // 立即设置一次 canvas 像素分辨率，避免默认 300×150 导致首帧变形
-    const initRect = container.getBoundingClientRect()
-    if (initRect.width > 0 && initRect.height > 0) {
-      const dpr = window.devicePixelRatio || 1
-      canvas.width = initRect.width * dpr
-      canvas.height = initRect.height * dpr
-    }
-    const ro = new ResizeObserver((entries) => {
-      for (const entry of entries) {
-        const { width, height } = entry.contentRect
-        if (width > 0 && height > 0) {
-          canvas.width = width * window.devicePixelRatio
-          canvas.height = height * window.devicePixelRatio
-        }
-      }
-    })
-    ro.observe(container)
-    return () => ro.disconnect()
-  }, [useWebCodecs, canPlay])
 
   // ── 未就绪 ──
   if (!ready || !assets.length) {
     return (
       <div
-        className="xx-preview-empty"
         style={{
-          position: "absolute",
+          position: "relative",
-          inset: 0,
+          width: "100%",
+          maxWidth: 280,
+          aspectRatio: "9 / 16",
+          background: "#0a0a0a",
+          borderRadius: 24,
+          overflow: "hidden",
+          boxShadow:
+            "0 4px 6px -1px rgba(0,0,0,0.3), 0 20px 50px -12px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(255,255,255,0.06)",
           display: "flex",
           flexDirection: "column",
           alignItems: "center",
           justifyContent: "center",
-          zIndex: 1,
         }}
       >
-        <SoundOutlined style={{ fontSize: 48, color: "var(--text-tertiary)", marginBottom: 12 }} />
+        <SoundOutlined style={{ fontSize: 40, color: "rgba(255,255,255,0.3)", marginBottom: 12 }} />
-        <p className="xx-preview-empty-title">准备预览素材...</p>
+        <p style={{ color: "rgba(255,255,255,0.6)", fontSize: 14, margin: "0 0 4px" }}>
-        <p className="xx-preview-empty-desc">加载素材后即可预览播放</p>
+          准备预览素材...
+        </p>
+        <p style={{ color: "rgba(255,255,255,0.35)", fontSize: 12, margin: 0 }}>
+          加载素材后即可预览播放
+        </p>
       </div>
     )
   }
 
   // ── 无播放片段 ──
   if (!canPlay) {
+    const showDecodeError = forceVideoFallback && canvasState.hasDecodeError
     return (
       <div
-        className="xx-preview-empty"
         style={{
-          position: "absolute",
+          position: "relative",
-          inset: 0,
+          width: "100%",
+          maxWidth: 280,
+          aspectRatio: "9 / 16",
+          background: "#0a0a0a",
+          borderRadius: 24,
+          overflow: "hidden",
+          boxShadow:
+            "0 4px 6px -1px rgba(0,0,0,0.3), 0 20px 50px -12px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(255,255,255,0.06)",
           display: "flex",
           flexDirection: "column",
           alignItems: "center",
           justifyContent: "center",
-          zIndex: 1,
+          padding: 24,
         }}
       >
         {isBuffering ? (
           <>
-            <LoadingOutlined style={{ fontSize: 48, color: "#fff", marginBottom: 12 }} spin />
+            <LoadingOutlined style={{ fontSize: 40, color: "#fff", marginBottom: 12 }} spin />
-            <p style={{ color: "rgba(255,255,255,0.8)" }}>加载中...</p>
+            <p style={{ color: "rgba(255,255,255,0.8)", fontSize: 14, margin: 0 }}>加载中...</p>
+          </>
+        ) : showDecodeError ? (
+          <>
+            <PlayCircleOutlined style={{ fontSize: 40, color: "#ef4444", marginBottom: 12 }} />
+            <p
+              style={{
+                color: "rgba(255,255,255,0.9)",
+                fontSize: 14,
+                margin: "0 0 4px",
+                fontWeight: 500,
+              }}
+            >
+              视频解码失败
+            </p>
+            <p
+              style={{
+                color: "rgba(255,255,255,0.5)",
+                fontSize: 12,
+                margin: 0,
+                textAlign: "center",
+              }}
+            >
+              {canvasState.errorMessage || "当前浏览器不支持该视频编码格式，请刷新重试"}
+            </p>
           </>
         ) : (
           <>
             <PlayCircleOutlined
-              style={{ fontSize: 48, color: "var(--text-tertiary)", marginBottom: 12 }}
+              style={{ fontSize: 40, color: "rgba(255,255,255,0.3)", marginBottom: 12 }}
             />
-            <p className="xx-preview-empty-title">暂无可播放素材</p>
+            <p style={{ color: "rgba(255,255,255,0.6)", fontSize: 14, margin: "0 0 4px" }}>
-            <p className="xx-preview-empty-desc">请先在左侧选择素材</p>
+              暂无可播放素材
+            </p>
+            <p style={{ color: "rgba(255,255,255,0.35)", fontSize: 12, margin: 0 }}>
+              请先在左侧选择素材
+            </p>
           </>
         )}
       </div>
@@ -330,9 +373,21 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
   }
 
   return (
-    <>
+    <div
+      style={{
+        position: "relative",
+        width: "100%",
+        maxWidth: 280,
+        aspectRatio: "9 / 16",
+        background: "#0a0a0a",
+        borderRadius: 24,
+        overflow: "hidden",
+        boxShadow:
+          "0 4px 6px -1px rgba(0,0,0,0.3), 0 20px 50px -12px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(255,255,255,0.06)",
+      }}
+    >
       {/* ── Canvas 渲染层（WebCodecs 路径） ── */}
-      {useWebCodecs && (
+      {effectiveUseWebCodecs && (
         <div
           ref={canvasContainerRef}
           style={{
@@ -353,8 +408,8 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
         </div>
       )}
 
-      {/* ── Video 渲染层（fallback 路径） ── */}
+      {/* ── Video 渲染层（默认路径，浏览器原生硬件解码） ── */}
-      {!useWebCodecs &&
+      {!effectiveUseWebCodecs &&
         segments.map((seg, i) => (
           <video
             key={seg.assetId}
@@ -362,9 +417,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
             ref={(el) => {
               videoRefs.current[i] = el
             }}
-            preload={
+            preload="auto"
-              i === videoCurrentSegIdx ? "auto" : i === videoCurrentSegIdx + 1 ? "metadata" : "none"
-            }
             src={seg.videoUrl}
             style={{
               position: "absolute",
@@ -381,54 +434,114 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
           />
         ))}
 
-      {/* 播放按钮 */}
+      {/* 标题CSS叠加层 — video fallback 路径也要渲染 */}
+      {titleSettings?.title && (
+        <div
+          style={{
+            position: "absolute",
+            left: 0,
+            right: 0,
+            zIndex: 5,
+            display: "flex",
+            justifyContent: "center",
+            pointerEvents: "none",
+            ...(titleSettings.position === "top"
+              ? { top: "10%" }
+              : titleSettings.position === "center"
+                ? { top: "50%", transform: "translateY(-50%)" }
+                : { bottom: "15%" }),
+          }}
+        >
+          <span
+            style={{
+              fontSize: titleSettings.size,
+              fontFamily: titleSettings.font || "思源黑体",
+              color: titleSettings.color || "#ffffff",
+              fontWeight: titleSettings.bold ? 700 : 400,
+              fontStyle: titleSettings.italic ? "italic" : "normal",
+              textShadow: [
+                titleSettings.shadow ? "0 2px 8px rgba(0,0,0,0.7)" : undefined,
+                titleSettings.stroke
+                  ? "1px 1px 0 rgba(0,0,0,0.5), -1px -1px 0 rgba(0,0,0,0.5), 1px -1px 0 rgba(0,0,0,0.5), -1px 1px 0 rgba(0,0,0,0.5)"
+                  : undefined,
+                "0 1px 3px rgba(0,0,0,0.4)",
+              ]
+                .filter(Boolean)
+                .join(", "),
+              maxWidth: "90%",
+              textAlign: "center",
+              lineHeight: 1.3,
+              wordBreak: "break-word",
+            }}
+          >
+            {titleSettings.title}
+          </span>
+        </div>
+      )}
+
+      {/* 中央播放按钮 */}
       {!isPlaying && (
         <button
-          className="xx-preview-play-btn"
           onClick={handleTogglePlay}
           style={{
             position: "absolute",
             top: "50%",
             left: "50%",
             transform: "translate(-50%, -50%)",
-            background: "rgba(0,0,0,0.5)",
+            background: "rgba(0,0,0,0.45)",
-            border: "none",
+            backdropFilter: "blur(12px)",
+            WebkitBackdropFilter: "blur(12px)",
+            border: "1px solid rgba(255,255,255,0.15)",
             borderRadius: "50%",
-            width: 56,
+            width: 52,
-            height: 56,
+            height: 52,
             cursor: "pointer",
             display: "flex",
             alignItems: "center",
             justifyContent: "center",
             color: "#fff",
-            fontSize: 28,
+            fontSize: 26,
             zIndex: 10,
+            transition: "transform 0.2s ease, background 0.2s ease",
+            boxShadow: "0 4px 20px rgba(0,0,0,0.4)",
+          }}
+          onMouseEnter={(e) => {
+            e.currentTarget.style.transform = "translate(-50%, -50%) scale(1.08)"
+            e.currentTarget.style.background = "rgba(0,0,0,0.6)"
+          }}
+          onMouseLeave={(e) => {
+            e.currentTarget.style.transform = "translate(-50%, -50%) scale(1)"
+            e.currentTarget.style.background = "rgba(0,0,0,0.45)"
           }}
         >
           <PlayCircleOutlined />
         </button>
       )}
 
-      {/* 片段指示器 */}
+      {/* 片段指示器 — 右上角胶囊 */}
       <div
         style={{
           position: "absolute",
           top: 8,
-          left: 8,
+          right: 8,
-          background: "rgba(0,0,0,0.6)",
+          background: "rgba(0,0,0,0.45)",
-          color: "#fff",
+          backdropFilter: "blur(8px)",
-          fontSize: 11,
+          WebkitBackdropFilter: "blur(8px)",
+          color: "rgba(255,255,255,0.9)",
+          fontSize: 10,
+          fontWeight: 500,
           padding: "2px 8px",
-          borderRadius: 4,
+          borderRadius: 999,
           zIndex: 10,
+          border: "1px solid rgba(255,255,255,0.1)",
+          letterSpacing: 0.3,
         }}
       >
-        {useWebCodecs ? "Canvas" : `片段 ${videoCurrentSegIdx + 1}/${segments.length}`}
+        {`${videoCurrentSegIdx + 1} / ${segments.length}`}
       </div>
 
-      {/* 控制条 */}
+      {/* 控制条 — 手机风格毛玻璃 */}
       <div
-        className="xx-preview-controls"
         style={{
           position: "absolute",
           bottom: 0,
@@ -436,23 +549,36 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
           right: 0,
           display: "flex",
           alignItems: "center",
-          gap: 8,
+          gap: 10,
-          padding: "8px 12px",
+          padding: "12px 16px 16px",
-          background: "linear-gradient(transparent, rgba(0,0,0,0.6))",
+          background: "linear-gradient(transparent, rgba(0,0,0,0.7))",
+          backdropFilter: "blur(4px)",
+          WebkitBackdropFilter: "blur(4px)",
           zIndex: 10,
         }}
       >
         <button
           onClick={handleTogglePlay}
           style={{
-            background: "none",
+            background: "rgba(255,255,255,0.15)",
             border: "none",
             color: "#fff",
-            fontSize: 18,
+            fontSize: 16,
             cursor: "pointer",
-            padding: 4,
+            width: 32,
+            height: 32,
+            borderRadius: "50%",
             display: "flex",
             alignItems: "center",
+            justifyContent: "center",
+            flexShrink: 0,
+            transition: "background 0.15s",
+          }}
+          onMouseEnter={(e) => {
+            e.currentTarget.style.background = "rgba(255,255,255,0.25)"
+          }}
+          onMouseLeave={(e) => {
+            e.currentTarget.style.background = "rgba(255,255,255,0.15)"
           }}
         >
           {isPlaying ? <PauseCircleOutlined /> : <PlayCircleOutlined />}
@@ -460,10 +586,11 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
 
         <span
           style={{
-            fontSize: 12,
+            fontSize: 11,
-            color: "rgba(255,255,255,0.8)",
+            color: "rgba(255,255,255,0.85)",
-            minWidth: 80,
+            minWidth: 72,
             fontVariantNumeric: "tabular-nums",
+            letterSpacing: 0.2,
           }}
         >
           {formatTime(currentTime)} / {formatTime(totalDuration)}
@@ -474,8 +601,8 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
           onMouseDown={handleMouseDown}
           style={{
             flex: 1,
-            height: 4,
+            height: 3,
-            background: "rgba(255,255,255,0.15)",
+            background: "rgba(255,255,255,0.2)",
             borderRadius: 2,
             cursor: "pointer",
             position: "relative",
@@ -485,7 +612,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
             style={{
               height: "100%",
               width: `${progressPercent}%`,
-              background: "#3b82f6",
+              background: "#fff",
               borderRadius: 2,
               transition: isDragging ? "none" : "width 0.1s linear",
             }}
@@ -499,15 +626,15 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
               width: 10,
               height: 10,
               borderRadius: "50%",
-              background: "#3b82f6",
+              background: "#fff",
-              border: "2px solid #fff",
+              boxShadow: "0 0 6px rgba(255,255,255,0.5)",
               opacity: isDragging ? 1 : 0,
               transition: "opacity 0.15s",
             }}
           />
         </div>
       </div>
-    </>
+    </div>
   )
 }
 

apps/web/src/pages/generate/components/GenerateStepContent.tsx

@@ -76,6 +76,14 @@ export interface GenerateStepContentProps {
   onDismissError: () => void
   /* 其他 */
   presetVoices: PresetVoiceItem[]
+  /** 预览任务创建回调——传递给 Step6CoverSettings */
+  onPreviewTaskCreated?: (taskId: string) => void
+  /** 从预览响应中提取到 source_edit_plan_id 时的回调 */
+  onSourceEditPlanIdExtracted?: (planId: string) => void
+  /** BGM 开关 */
+  bgm: boolean
+  /** BGM 配置（来自模板） */
+  bgmConfig?: { enabled: boolean; music_id?: string }
 }
 
 export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) => {
@@ -121,8 +129,16 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
     onRetry,
     onDismissError,
     presetVoices,
+    onPreviewTaskCreated,
+    onSourceEditPlanIdExtracted,
+    bgm,
+    bgmConfig,
   } = props
 
+  /* 当前模板的 segments，传给 Step2 构建 clips */
+  const currentTemplate = userTemplates.find((t) => t.id === selectedTemplate)
+  const templateSegments = currentTemplate?.segments
+
   switch (currentStep) {
     case 1:
       return (
@@ -141,6 +157,8 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
           onSelectedMaterialsChange={onSelectedMaterialsChange}
           smartSelectedIds={smartSelectedIds}
           onSmartSelectedIdsChange={onSmartSelectedIdsChange}
+          selectedTemplate={selectedTemplate}
+          templateSegments={templateSegments}
         />
       )
     case 3:
@@ -156,6 +174,7 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
         <Step4TitleSettings
           titleSettings={titleSettings}
           onTitleSettingsChange={onTitleSettingsChange}
+          selectedTemplate={selectedTemplate}
         />
       )
     case 5:
@@ -182,6 +201,14 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
           duration={duration}
           assetIds={materialMode === "auto" ? smartSelectedIds : selectedMaterials}
           selectedTemplate={selectedTemplate}
+          titleSettings={titleSettings}
+          onPreviewTaskCreated={onPreviewTaskCreated}
+          onSourceEditPlanIdExtracted={onSourceEditPlanIdExtracted}
+          voiceMode={voiceMode}
+          selectedVoice={selectedVoice}
+          selectedClonedVoice={selectedClonedVoice}
+          bgm={bgm}
+          bgmConfig={bgmConfig}
         />
       )
     case 7:

apps/web/src/pages/generate/components/PreviewVideoPanel.tsx

@@ -1,38 +1,42 @@
 /**
- * 右侧预览视频面板
+ * 右侧预览视频面板 — 服务器渲染预览架构
- * Step4+: 显示预览视频面板
- * Step5: 前端实时预览 — 用原生 video 播放素材片段 + CSS 标题叠加
  *
- * 架构改造：完全去除后端 FFmpeg 预览依赖
+ * Step4+: 显示预览面板
- * - 使用 FrontendPreviewPlayer 直接播放素材片段
+ * Step5: 播放服务器渲染的真实视频（POST /generation/preview）
- * - TitleOverlay CSS 层实时响应标题样式变化
  *
- * 布局：本组件提供 .xx-preview-video 容器（position: relative + overflow: hidden）
+ * 架构：
- * FrontendPreviewPlayer 的内容通过 absolute 定位填充容器
+ * - 进入 Step4/5 时自动创建服务器预览渲染任务
- * TitleOverlay 通过 absolute 定位 + z-index: 30 覆盖在最上层
+ * - 轮询完成后用 <video> 标签播放返回的 video_url
+ * - 标题样式编辑时 CSS TitleOverlay 实时叠加预览
+ * - 素材/配音/BGM 变更自动重新渲染
+ * - 标题文字/样式变更标记 stale，保留旧视频 + 显示"重新预览"按钮
+ *
+ * 点"确认生成"时走 confirm 路径，成品就是预览视频本身，100% 一致。
  */
 import React, { useMemo, useRef, useState, useEffect } from "react"
-import { LoadingOutlined } from "@ant-design/icons"
+import { LoadingOutlined, ReloadOutlined, ExclamationCircleOutlined } from "@ant-design/icons"
-import type { AssetItem } from "@/api/assets"
+import { Button } from "antd"
-import type { EditingTemplate } from "@/api/editing-planner"
 import type { TitleSettings } from "../types"
-import FrontendPreviewPlayer from "./FrontendPreviewPlayer"
+import { getFontFamily } from "../constants"
+import type { ServerPreviewStatus } from "../hooks/useServerPreview"
 
 interface PreviewVideoPanelProps {
-  /** 已加载的素材列表 */
+  /** 服务器预览状态 */
-  assets: AssetItem[]
+  previewStatus: ServerPreviewStatus
-  /** 当前模板 */
+  /** 服务器渲染视频 URL */
-  template: EditingTemplate | null
+  videoUrl: string | null
+  /** 渲染进度 0-100 */
+  progress: number
+  /** 错误信息 */
+  error: string | null
+  /** 重新预览回调 */
+  onRetry: () => void
   /** 视频比例 */
   videoRatio: string
-  /** 素材是否已加载就绪 */
+  /** 标题设置 — CSS 实时预览层 */
-  assetsReady: boolean
-  /** 素材是否正在加载 */
-  assetsLoading: boolean
-  /** 标题设置 — 用于 CSS 实时预览层 */
   titleSettings?: TitleSettings
-  /** 配音音频 URL */
+  /** 素材数量 */
-  voiceAudioUrl?: string
+  assetCount?: number
 }
 
 /* ── ASS 坐标系参数（与后端 ass_subtitle_builder.py 一致） ── */
@@ -41,13 +45,8 @@ const ASS_TITLE_MARGIN_TOP = 60
 const ASS_TITLE_MARGIN_BOTTOM = 60
 const ASS_TITLE_MARGIN_SIDE = 40
 
-/**
- * 根据 position 计算 CSS 垂直定位
- * 与后端 position_to_ass_alignment() 对齐：top→8, center→5, bottom→2
- */
 function getPositionStyle(position: string): React.CSSProperties {
   const sidePercent = (ASS_TITLE_MARGIN_SIDE / 1280) * 100
-
   switch (position) {
     case "bottom":
       return {
@@ -75,19 +74,14 @@ function getPositionStyle(position: string): React.CSSProperties {
   }
 }
 
-/**
- * 构建 CSS 标题层的样式
- * 所有渲染参数与后端 FFmpeg ASS 字幕一致
- */
 function buildTitleStyle(settings: TitleSettings, containerHeight: number): React.CSSProperties {
-  // 用 px 计算 fontSize，不再依赖父元素 font-size 的百分比
   const fontSizePx =
     containerHeight > 0
       ? (Math.min(settings.size, 96) / ASS_VIDEO_HEIGHT) * containerHeight
-      : (Math.min(settings.size, 96) / ASS_VIDEO_HEIGHT) * 400 // fallback
+      : (Math.min(settings.size, 96) / ASS_VIDEO_HEIGHT) * 400
 
   const base: React.CSSProperties = {
-    fontFamily: settings.font || "思源黑体",
+    fontFamily: getFontFamily(settings.font),
     fontSize: `${fontSizePx}px`,
     color: settings.color || "#ffffff",
     fontWeight: settings.bold ? 700 : 400,
@@ -99,28 +93,16 @@ function buildTitleStyle(settings: TitleSettings, containerHeight: number): Reac
     paddingLeft: `${(ASS_TITLE_MARGIN_SIDE / 1280) * 100}%`,
     paddingRight: `${(ASS_TITLE_MARGIN_SIDE / 1280) * 100}%`,
   }
-
+  if (settings.stroke) base.WebkitTextStroke = "1px #000000"
-  if (settings.stroke) {
+  if (settings.shadow) base.textShadow = "2px 2px 4px rgba(0,0,0,0.8)"
-    base.WebkitTextStroke = "1px #000000"
-  }
-
-  if (settings.shadow) {
-    base.textShadow = "2px 2px 4px rgba(0,0,0,0.8)"
-  }
-
   return base
 }
 
-/**
+/** CSS 标题实时预览覆盖层 */
- * CSS 标题预览覆盖层
- * 始终渲染：有标题显示标题，无标题显示占位文本"标题预览"
- * z-index: 20（在视频 z-index:1 和控制条 z-index:10 之上）
- */
 const TitleOverlay: React.FC<{ titleSettings: TitleSettings }> = ({ titleSettings }) => {
   const containerRef = useRef<HTMLDivElement>(null)
-  const [containerHeight, setContainerHeight] = useState(400) // fallback
+  const [containerHeight, setContainerHeight] = useState(400)
 
-  // ResizeObserver 获取容器实际高度
   useEffect(() => {
     const el = containerRef.current
     if (!el) return
@@ -131,7 +113,6 @@ const TitleOverlay: React.FC<{ titleSettings: TitleSettings }> = ({ titleSetting
       }
     })
     ro.observe(el)
-    // 初始化也读一次
     const rect = el.getBoundingClientRect()
     if (rect.height > 0) setContainerHeight(rect.height)
     return () => ro.disconnect()
@@ -143,7 +124,7 @@ const TitleOverlay: React.FC<{ titleSettings: TitleSettings }> = ({ titleSetting
   )
   const titleStyle = useMemo(
     () => buildTitleStyle(titleSettings, containerHeight),
-    // eslint-disable-next-line react-hooks/exhaustive-deps -- 已逐字段列出 titleSettings 依赖
+    // eslint-disable-next-line react-hooks/exhaustive-deps
     [
       containerHeight,
       titleSettings.font,
@@ -169,14 +150,13 @@ const TitleOverlay: React.FC<{ titleSettings: TitleSettings }> = ({ titleSetting
         overflow: "hidden",
       }}
     >
-      <div
+      <div style={{ ...positionStyle, ...titleStyle, position: "absolute" }}>
-        style={{
+        {displayTitle.split(/[/／]/).map((part, i) => (
-          ...positionStyle,
+          <span key={i}>
-          ...titleStyle,
+            {i > 0 && <br />}
-          position: "absolute",
+            {part}
-        }}
+          </span>
-      >
+        ))}
-        {displayTitle}
       </div>
     </div>
   )
@@ -185,30 +165,47 @@ const TitleOverlay: React.FC<{ titleSettings: TitleSettings }> = ({ titleSetting
 /* ── 主组件 ── */
 
 export const PreviewVideoPanel: React.FC<PreviewVideoPanelProps> = ({
-  assets,
+  previewStatus,
-  template,
+  videoUrl,
+  progress,
+  error,
+  onRetry,
   videoRatio,
-  assetsReady,
-  assetsLoading,
   titleSettings,
-  voiceAudioUrl,
+  assetCount,
 }) => {
   const videoAspectStyle = { aspectRatio: (videoRatio || "9:16").replace(":", "/") }
+  const isLoading = previewStatus === "loading"
+  const isReady = previewStatus === "ready" || previewStatus === "stale"
+  const isFailed = previewStatus === "failed"
+  const isIdle = previewStatus === "idle"
+  const isStale = previewStatus === "stale"
 
   return (
     <div className="xx-generate-preview">
       <div className="xx-preview-header">
         <h3>预览视频</h3>
-        {assetsReady && assets.length > 0 && <span className="xx-preview-badge">实时预览</span>}
+        {isReady && !isStale && <span className="xx-preview-badge">服务器渲染</span>}
+        {isStale && (
+          <span
+            style={{
+              fontSize: 12,
+              color: "#faad14",
+              display: "flex",
+              alignItems: "center",
+              gap: 4,
+            }}
+          >
+            <ExclamationCircleOutlined /> 配置已变更
+          </span>
+        )}
+        {isLoading && <span className="xx-preview-badge">渲染中</span>}
       </div>
 
-      {/* ✅ 预览容器 — 唯一的 .xx-preview-video 容器
-          内部所有内容（视频、控制条、标题叠加层）通过 absolute 定位填充 */}
       <div className="xx-preview-video" style={{ ...videoAspectStyle, position: "relative" }}>
-        {/* 加载中状态 */}
+        {/* 加载中 */}
-        {assetsLoading && (
+        {isLoading && (
           <div
-            className="xx-preview-loading-center"
             style={{
               position: "absolute",
               inset: 0,
@@ -217,34 +214,130 @@ export const PreviewVideoPanel: React.FC<PreviewVideoPanelProps> = ({
               alignItems: "center",
               justifyContent: "center",
               zIndex: 5,
+              background: "rgba(0,0,0,0.6)",
             }}
           >
             <LoadingOutlined style={{ fontSize: 36, color: "#fff" }} spin />
-            <p style={{ marginTop: 12, color: "rgba(255,255,255,0.8)", fontSize: 14 }}>
+            <p style={{ marginTop: 12, color: "rgba(255,255,255,0.9)", fontSize: 14 }}>
-              加载素材中...
+              正在渲染预览视频{progress > 0 ? `...${progress}%` : "..."}
+            </p>
+            <p style={{ marginTop: 4, color: "rgba(255,255,255,0.5)", fontSize: 12 }}>
+              首次渲染约需 30-60 秒
             </p>
           </div>
         )}
 
-        {/* 前端播放器（视频 + 控制条 + 播放按钮）*/}
+        {/* 空闲状态（尚未触发预览） */}
-        <FrontendPreviewPlayer
+        {isIdle && (
-          assets={assets}
+          <div
-          template={template}
+            style={{
-          videoRatio={videoRatio}
+              position: "absolute",
-          ready={assetsReady}
+              inset: 0,
-          voiceAudioUrl={voiceAudioUrl}
+              display: "flex",
-        />
+              flexDirection: "column",
+              alignItems: "center",
+              justifyContent: "center",
+              background: "rgba(0,0,0,0.3)",
+              zIndex: 5,
+            }}
+          >
+            <p style={{ color: "rgba(255,255,255,0.7)", fontSize: 14 }}>等待素材选择...</p>
+          </div>
+        )}
 
-        {/* CSS 标题实时预览层 — z-index: 20，始终渲染在内容层之上 */}
+        {/* 服务器渲染的真实视频 */}
-        {titleSettings && <TitleOverlay titleSettings={titleSettings} />}
+        {isReady && videoUrl && (
+          <video
+            key={videoUrl}
+            src={videoUrl}
+            controls
+            autoPlay
+            loop
+            playsInline
+            style={{
+              width: "100%",
+              height: "100%",
+              objectFit: "contain",
+              position: "absolute",
+              inset: 0,
+              zIndex: 1,
+            }}
+          />
+        )}
+
+        {/* 标题样式实时预览层（仅在有视频时叠加） */}
+        {isReady && titleSettings && <TitleOverlay titleSettings={titleSettings} />}
+
+        {/* stale 遮罩：配置变更提示 */}
+        {isStale && (
+          <div
+            style={{
+              position: "absolute",
+              bottom: 0,
+              left: 0,
+              right: 0,
+              padding: "10px 16px",
+              background: "linear-gradient(transparent, rgba(0,0,0,0.85))",
+              display: "flex",
+              alignItems: "center",
+              justifyContent: "space-between",
+              gap: 8,
+              zIndex: 30,
+            }}
+          >
+            <span style={{ color: "rgba(255,255,255,0.9)", fontSize: 12 }}>
+              配置已变更，预览内容可能不是最新
+            </span>
+            <Button size="small" type="primary" icon={<ReloadOutlined />} onClick={onRetry}>
+              重新预览
+            </Button>
+          </div>
+        )}
+
+        {/* 错误状态 */}
+        {isFailed && (
+          <div
+            style={{
+              position: "absolute",
+              inset: 0,
+              display: "flex",
+              flexDirection: "column",
+              alignItems: "center",
+              justifyContent: "center",
+              background: "rgba(0,0,0,0.7)",
+              zIndex: 10,
+              padding: 24,
+            }}
+          >
+            <ExclamationCircleOutlined style={{ fontSize: 40, color: "#ff4d4f" }} />
+            <p
+              style={{
+                marginTop: 12,
+                color: "rgba(255,255,255,0.9)",
+                fontSize: 14,
+                textAlign: "center",
+              }}
+            >
+              {error || "预览渲染失败"}
+            </p>
+            <Button
+              type="primary"
+              icon={<ReloadOutlined />}
+              onClick={onRetry}
+              style={{ marginTop: 12 }}
+            >
+              重新预览
+            </Button>
+          </div>
+        )}
       </div>
 
       {/* 素材信息 */}
-      {assetsReady && assets.length > 0 && (
+      {assetCount !== undefined && assetCount > 0 && (
         <div className="xx-preview-info">
           <div className="xx-preview-info-row">
             <span>素材数</span>
-            <span>{assets.length} 个</span>
+            <span>{assetCount} 个</span>
           </div>
           <div className="xx-preview-info-row">
             <span>比例</span>

apps/web/src/pages/generate/components/Step2MaterialSelect.tsx

@@ -2,6 +2,7 @@
  * Step 2 素材选择组件
  */
 import React from "react"
+import type { TemplateSegment } from "@/api/templates/types"
 import { useStep2Materials } from "../hooks/useStep2Materials"
 import MaterialModeTabs from "./material/MaterialModeTabs"
 import ManualMaterialList from "./material/ManualMaterialList"
@@ -15,6 +16,10 @@ interface Step2MaterialSelectProps {
   onSelectedMaterialsChange: (ids: string[]) => void
   smartSelectedIds: string[]
   onSmartSelectedIdsChange: (ids: string[]) => void
+  /** 当前选中的模板/草稿 ID，用于自动保存 */
+  selectedTemplate?: string
+  /** 当前模板的 segments（用于构建 clips duration） */
+  templateSegments?: TemplateSegment[]
 }
 
 const Step2MaterialSelect: React.FC<Step2MaterialSelectProps> = (props) => {

apps/web/src/pages/generate/components/Step4TitleSettings.tsx

@@ -12,6 +12,8 @@ import AiTitleGenerator from "./title/AiTitleGenerator"
 interface Step4TitleSettingsProps {
   titleSettings: TitleSettings
   onTitleSettingsChange: (settings: TitleSettings) => void
+  /** 当前选中的模板/草稿 ID，用于自动保存 */
+  selectedTemplate?: string
 }
 
 const Step4TitleSettings: React.FC<Step4TitleSettingsProps> = (props) => {

apps/web/src/pages/generate/components/Step5GeneratePreview.tsx

@@ -1,7 +1,10 @@
 /**
- * Step 5 生成预览组件
+ * Step 5 预览设置组件
- * 架构改造：移除后端预览生成，改为前端实时预览
+ *
- * 左侧仅保留标题样式面板，视频在右侧 PreviewVideoPanel 实时播放
+ * 前端实时预览架构：
+ * - 右侧面板使用 FrontendPreviewPlayer 实时播放素材片段
+ * - 标题样式可实时调整，CSS 层即时叠加预览
+ * - 点"确认生成"时触发一次服务器渲染
  */
 import React from "react"
 import { PlayCircleOutlined } from "@ant-design/icons"
@@ -10,7 +13,6 @@ import type { TitleSettings } from "../types"
 import TitleStylePanel from "./title/TitleStylePanel"
 
 interface Step5GeneratePreviewProps {
-  /* 标题样式 */
   titleSettings: TitleSettings
   onUpdatePosition: (position: string) => void
   onUpdateFont: (font: string) => void
@@ -41,9 +43,7 @@ const Step5GeneratePreview: React.FC<Step5GeneratePreviewProps> = ({
     <div className="xx-form-section">
       <h3>🎬 预览设置</h3>
 
-      {/* 前端实时预览提示 */}
       <div
-        className="xx-preview-tip"
         style={{
           display: "flex",
           alignItems: "center",
@@ -57,11 +57,10 @@ const Step5GeneratePreview: React.FC<Step5GeneratePreviewProps> = ({
       >
         <PlayCircleOutlined style={{ fontSize: 18, color: "#3b82f6" }} />
         <span style={{ fontSize: 13, color: "var(--text-secondary, #666)" }}>
-          右侧面板直接播放素材片段，调整标题样式可实时预览效果
+          右侧为实时预览，选完素材即可播放。确认生成后服务器渲染最终视频
         </span>
       </div>
 
-      {/* 标题样式面板 */}
       <TitleStylePanel
         settings={titleSettings}
         onUpdatePosition={onUpdatePosition}

apps/web/src/pages/generate/components/Step5VoiceSelect.tsx

@@ -17,6 +17,16 @@ interface Step5VoiceSelectProps {
 }
 
 /** 格式化时长 mm:ss */
+/** 获取素材实际时长（优先顶层 duration，fallback 到 metadata.duration） */
+const getDuration = (item: AssetItem): number => {
+  return item.duration ?? (item.metadata?.duration as number) ?? 0
+}
+
+/** 获取素材实际文件大小 */
+const getFileSize = (item: AssetItem): number => {
+  return item.file_size ?? (item.metadata?.file_size as number) ?? 0
+}
+
 const formatDuration = (seconds?: number): string => {
   if (!seconds || seconds <= 0) return "00:00"
   const m = Math.floor(seconds / 60)
@@ -89,7 +99,7 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
       // 如果启用了时长校验，且配音时长不足
       if (totalVideoDuration > 0) {
         const material = materials.find((m) => m.id === id)
-        if (material && (material.duration || 0) < totalVideoDuration) {
+        if (material && getDuration(material) < totalVideoDuration) {
           setPendingVoiceId(id)
           setDurationWarningOpen(true)
           return
@@ -271,25 +281,24 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
                 }}
               >
                 <span style={{ display: "flex", alignItems: "center", gap: 4 }}>
-                  {formatDuration(item.duration)}
+                  {formatDuration(getDuration(item))}
-                  {totalVideoDuration > 0 &&
+                  {totalVideoDuration > 0 && getDuration(item) < Number(totalVideoDuration) && (
-                    (Number(item.duration) || 0) < Number(totalVideoDuration) && (
+                    <span
-                      <span
+                      style={{
-                        style={{
+                        color: "#ff4d4f",
-                          color: "#ff4d4f",
+                        fontSize: 11,
-                          fontSize: 11,
+                        fontWeight: 500,
-                          fontWeight: 500,
+                        display: "inline-flex",
-                          display: "inline-flex",
+                        alignItems: "center",
-                          alignItems: "center",
+                        gap: 2,
-                          gap: 2,
+                      }}
-                        }}
+                    >
-                      >
+                      <WarningOutlined />
-                        <WarningOutlined />
+                      时长不足
-                        时长不足
+                    </span>
-                      </span>
+                  )}
-                    )}
                 </span>
-                <span>{formatFileSize(item.file_size)}</span>
+                <span>{formatFileSize(getFileSize(item))}</span>
               </div>
             </div>
           )
@@ -318,7 +327,9 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
           return (
             <p>
               该配音时长（
-              <strong>{pendingMaterial ? formatDuration(pendingMaterial.duration) : "--"}</strong>
+              <strong>
+                {pendingMaterial ? formatDuration(getDuration(pendingMaterial)) : "--"}
+              </strong>
               ）短于视频总时长（
               <strong>{formatDuration(totalVideoDuration)}</strong>
               ），播放时配音可能提前结束，建议选择更长的配音素材。

apps/web/src/pages/generate/components/Step6CoverSettings.tsx

@@ -14,6 +14,22 @@ interface Step6CoverSettingsProps {
   assetIds?: string[]
   /** 当前选中的模板 ID */
   selectedTemplate?: string
+  /** Step4 标题设置，用于预览视频烧录标题 & 封面叠加标题 */
+  titleSettings?: import("../types").TitleSettings
+  /** 预览任务创建回调——将 task_id 暴露给父组件供 confirmGeneration 复用 */
+  onPreviewTaskCreated?: (taskId: string) => void
+  /** 从预览响应中提取到 source_edit_plan_id 时的回调 */
+  onSourceEditPlanIdExtracted?: (planId: string) => void
+  /** 配音模式 */
+  voiceMode?: "preset" | "custom" | "clone"
+  /** 选中的配音素材 ID */
+  selectedVoice?: string
+  /** 选中的克隆音色 ID */
+  selectedClonedVoice?: string
+  /** BGM 开关 */
+  bgm?: boolean
+  /** BGM 配置 */
+  bgmConfig?: { enabled: boolean; music_id?: string }
 }
 
 const Step6CoverSettings: React.FC<Step6CoverSettingsProps> = (props) => {
@@ -40,6 +56,14 @@ const Step6CoverSettings: React.FC<Step6CoverSettingsProps> = (props) => {
     duration: props.duration,
     assetIds: props.assetIds,
     selectedTemplate: props.selectedTemplate,
+    titleSettings: props.titleSettings,
+    onPreviewTaskCreated: props.onPreviewTaskCreated,
+    onSourceEditPlanIdExtracted: props.onSourceEditPlanIdExtracted,
+    voiceMode: props.voiceMode,
+    selectedVoice: props.selectedVoice,
+    selectedClonedVoice: props.selectedClonedVoice,
+    bgm: props.bgm,
+    bgmConfig: props.bgmConfig,
   })
 
   const handleAutoGenerate = () => {

apps/web/src/pages/generate/components/title/TitlePresetsGrid.tsx

@@ -2,6 +2,7 @@
  * 标题预设样式网格
  */
 import React from "react"
+import { getFontFamily } from "../../constants"
 
 interface TitlePresetItem {
   key: string
@@ -35,7 +36,7 @@ const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({
           >
             <span
               className="xx-title-preset-preview-text"
-              style={{ ...p.previewStyle, ...(fontFamily ? { fontFamily } : {}) }}
+              style={{ ...p.previewStyle, fontFamily: getFontFamily(fontFamily || "思源黑体") }}
             >
               标题
             </span>

apps/web/src/pages/generate/constants.ts

@@ -56,6 +56,21 @@ export const FONT_OPTIONS = [
   "华康俪金黑",
 ]
 
+/* ── 标题字体 CSS font-family 映射（中文显示名 → 浏览器可识别的字体栈） ── */
+export const FONT_FAMILY_MAP: Record<string, string> = {
+  思源黑体: '"Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif',
+  思源宋体: '"Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif',
+  苹方: '"PingFang SC", -apple-system, "Helvetica Neue", sans-serif',
+  PingFang: '"PingFang SC", -apple-system, "Helvetica Neue", sans-serif',
+  微软雅黑: '"Microsoft YaHei", "PingFang SC", sans-serif',
+  楷体: '"KaiTi", "STKaiti", "DFKai-SB", serif',
+  华康俪金黑: '"华康俪金黑", "DFLiJinHei-W8", "Source Han Sans SC", "Microsoft YaHei", sans-serif',
+}
+
+export function getFontFamily(font: string): string {
+  return FONT_FAMILY_MAP[font] || FONT_FAMILY_MAP["思源黑体"]
+}
+
 /* ── 标题样式预设 ── */
 export const TITLE_PRESETS = [
   {

apps/web/src/pages/generate/generate.css

@@ -2309,6 +2309,8 @@
 .xx-cover-preview-box {
   position: relative;
   aspect-ratio: 9 / 16;
+  max-width: 180px;
+  margin: 0 auto;
   background: var(--bg-tertiary);
   border-radius: var(--radius-md);
   overflow: hidden;
@@ -2523,6 +2525,7 @@
 .xx-generate-right-col {
   display: flex;
   flex-direction: column;
+  align-items: center;
   gap: 16px;
 }
 

apps/web/src/pages/generate/hooks/generate-video/types.ts

@@ -19,6 +19,17 @@ export interface UseGenerateVideoProps {
   autoSubtitles: boolean
   bgm: boolean
   generateCount: number
+  /** 当前草稿 ID（URL 参数 edit_plan_id，用于后端回写任务关联） */
+  sourceEditPlanId?: string | null
+  /** 预览任务 ID（由 useStep6Cover 创建后写入，供 confirmGeneration 复用预览产物） */
+  previewTaskId?: string | null
+  /** BGM 配置（来自模板 bgm_config，受 bgm 开关控制） */
+  bgmConfig?: {
+    enabled: boolean
+    music_id?: string
+  }
+  /** 生成成功后的回调（用于清除持久化的 previewTaskId 等状态） */
+  onGenerationSuccess?: () => void
 }
 
 /** 生成阶段 */

apps/web/src/pages/generate/hooks/generate-video/useGenerationPolling.ts

@@ -1,87 +1,146 @@
 import { useRef, useCallback } from "react"
 import { message } from "antd"
-import { getGenerationStatus, getGenerationTaskResults } from "@/api/template-editor"
+import axios from "axios"
+import { getGenerationTask } from "@/api/tasks/tasks"
+import { getGenerationTaskResults } from "@/api/template-editor"
 import { safeExtractError } from "./errorUtils"
 
 interface UseGenerationPollingOptions {
-  templateId: string
   onProgress: (progress: number) => void
   onComplete: (videos: unknown[]) => void
   onFailed: (errorMsg: string) => void
 }
 
+/** 最大连续错误次数（仅对可重试错误），超过后终止轮询 */
+const MAX_RETRYABLE_ERRORS = 10
+/** 获取结果的最大重试次数 */
+const MAX_RESULTS_RETRIES = 3
+
 /**
- * 生成状态轮询 Hook
+ * 生成状态轮询 Hook（v2 — 改用 /generation/tasks/{task_id}）
- * 轮询生成状态，更新进度，处理完成/失败
+ *
+ * 旧版轮询 GET /templates/{id}/editor/generation-status 依赖 plan 维度状态，
+ * 在编辑流程数据链路断裂时拿不到 task_id。新版直接使用 POST /generation/tasks
+ * 返回的 task_id 轮询任务详情，不再依赖 plan。
+ *
+ * 错误处理：
+ * - 4xx（尤其 404）视为不可恢复，立即 onFailed，不再重试
+ * - 5xx / 网络错误重试，最多连续 MAX_RETRYABLE_ERRORS 次
+ * - 任务完成后获取结果失败会重试 MAX_RESULTS_RETRIES 次，仍失败则 onFailed
  */
 export const useGenerationPolling = ({
-  templateId,
   onProgress,
   onComplete,
   onFailed,
 }: UseGenerationPollingOptions) => {
   const progressTimer = useRef<ReturnType<typeof setTimeout>>()
+  const cancelledRef = useRef(false)
 
   const clearTimer = useCallback(() => {
+    cancelledRef.current = true
     if (progressTimer.current) {
       clearTimeout(progressTimer.current)
       progressTimer.current = undefined
     }
   }, [])
 
-  const startPolling = useCallback(() => {
+  /** 任务完成后拉取结果列表，带重试 */
-    const poll = async () => {
+  const fetchResultsWithRetry = useCallback(
+    async (taskId: string, attempt = 0): Promise<unknown[] | null> => {
       try {
-        const data = await getGenerationStatus(templateId)
+        return await getGenerationTaskResults(taskId)
-
+      } catch (err) {
-        if (data.plan_status === "completed") {
+        if (cancelledRef.current) return null
-          onProgress(100)
+        console.error(`[获取生成结果失败] 第 ${attempt + 1} 次`, err)
-          // 获取生成的视频结果
+        if (attempt < MAX_RESULTS_RETRIES - 1) {
-          let videos: unknown[] = []
+          await new Promise((resolve) => setTimeout(resolve, 1000 * (attempt + 1)))
-          if (data.generation_task_id) {
+          return fetchResultsWithRetry(taskId, attempt + 1)
-            try {
-              videos = await getGenerationTaskResults(data.generation_task_id)
-            } catch (err) {
-              console.error("[获取生成结果失败]", err)
-            }
-          }
-          onComplete(videos)
-          message.success("视频生成完成！")
-          return
         }
-        if (data.plan_status === "failed") {
+        return null
-          const dataAny = data as unknown as Record<string, unknown>
-          const rawMsg =
-            dataAny.error_message ||
-            dataAny.error ||
-            dataAny.message ||
-            (Array.isArray(data.clips)
-              ? (data.clips as { status: string; error_message?: string }[]).find(
-                  (c) => c.status === "failed",
-                )?.error_message
-              : undefined) ||
-            "视频生成失败，请联系管理员或重试"
-          const errorMsg = safeExtractError(rawMsg)
-          console.error("[生成失败] templateId:", templateId, "响应:", data)
-          onFailed(errorMsg)
-          message.error(errorMsg)
-          return
-        }
-
-        const clips = data.clips || []
-        const total = clips.length || 1
-        const done = (clips as { status: string }[]).filter((c) => c.status === "completed").length
-        onProgress(Math.round((done / total) * 100))
-
-        progressTimer.current = setTimeout(poll, 2000)
-      } catch (pollErr) {
-        console.error("[轮询出错] templateId:", templateId, pollErr)
-        progressTimer.current = setTimeout(poll, 3000)
       }
-    }
+    },
+    [],
+  )
 
-    progressTimer.current = setTimeout(poll, 2000)
+  const startPolling = useCallback(
-  }, [templateId, onProgress, onComplete, onFailed])
+    (taskId: string) => {
+      cancelledRef.current = false
+      let consecutiveErrors = 0
+
+      const poll = async () => {
+        if (cancelledRef.current) return
+        try {
+          const task = await getGenerationTask(taskId)
+          consecutiveErrors = 0
+
+          if (task.status === "completed") {
+            onProgress(100)
+            const videos = await fetchResultsWithRetry(taskId)
+            if (cancelledRef.current) return
+            if (videos === null) {
+              const errorMsg = "视频已生成，但获取结果列表失败，请稍后在任务列表查看"
+              console.error("[生成结果获取失败] taskId:", taskId)
+              onFailed(errorMsg)
+              message.error(errorMsg)
+              return
+            }
+            onComplete(videos)
+            message.success("视频生成完成！")
+            return
+          }
+
+          if (task.status === "failed" || task.status === "cancelled") {
+            const rawMsg =
+              task.error_info?.error_message ||
+              task.error_message ||
+              (task.status === "cancelled" ? "任务已取消" : "视频生成失败，请联系管理员或重试")
+            const errorMsg = safeExtractError(rawMsg)
+            console.error("[生成失败] taskId:", taskId, "响应:", task)
+            onFailed(errorMsg)
+            message.error(errorMsg)
+            return
+          }
+
+          // pending / waiting / running — 继续轮询
+          const pct = Math.max(0, Math.min(99, Math.round(Number(task.progress) || 0)))
+          onProgress(pct)
+          progressTimer.current = setTimeout(poll, 2000)
+        } catch (pollErr) {
+          if (cancelledRef.current) return
+          console.error("[轮询出错] taskId:", taskId, pollErr)
+
+          // 4xx 不可恢复，立即失败
+          const status = axios.isAxiosError(pollErr) ? pollErr.response?.status : undefined
+          if (status && status >= 400 && status < 500) {
+            const msg =
+              (axios.isAxiosError(pollErr) &&
+                (pollErr.response?.data as { detail?: string; message?: string } | undefined)
+                  ?.detail) ||
+              (axios.isAxiosError(pollErr) &&
+                (pollErr.response?.data as { detail?: string; message?: string } | undefined)
+                  ?.message) ||
+              `查询任务失败 (${status})`
+            const errorMsg = safeExtractError(msg)
+            onFailed(errorMsg)
+            message.error(errorMsg)
+            return
+          }
+
+          consecutiveErrors += 1
+          if (consecutiveErrors >= MAX_RETRYABLE_ERRORS) {
+            const errorMsg = "任务状态查询连续失败，请稍后在任务列表查看结果"
+            onFailed(errorMsg)
+            message.error(errorMsg)
+            return
+          }
+          progressTimer.current = setTimeout(poll, 3000)
+        }
+      }
+
+      progressTimer.current = setTimeout(poll, 1500)
+    },
+    [onProgress, onComplete, onFailed, fetchResultsWithRetry],
+  )
 
   return { startPolling, clearTimer }
 }

apps/web/src/pages/generate/hooks/useCanvasPlayer.ts

@@ -9,8 +9,21 @@ import { createFile } from "mp4box"
 import type { Movie, Sample } from "mp4box"
 
 // ── 常量 ──
-/** 初始化预解码最大帧数（约 2 秒 @30fps），后续帧通过 decodeAroundPosition 按需解码 */
+
-const MAX_INIT_FRAMES = 60
+/**
+ * 规范化 mp4box 提取的 codec 字符串为 WebCodecs 兼容格式
+ * mp4box 返回的 codec 可能包含 mp4box 特有后缀（如 avc1.640028），
+ * WebCodecs 要求标准 ISO BMFF codec string（如 avc1.640028）
+ * 大部分情况下格式一致，但需要做防御性处理
+ */
+function normalizeCodecString(codec: string): string {
+  // mp4box 有时返回带空格的 codec，去掉
+  const trimmed = codec.trim()
+  // HEVC: mp4box 可能返回 hev1.1.6.L93.B0 或 hvc1.1.6.L93.B0
+  // WebCodecs 接受 hev1.x.x 或 hvc1.x.x，两者都可
+  // H.264: mp4box 返回 avc1.640028，WebCodecs 也接受
+  return trimmed
+}
 
 // ── MP4 Box 解析辅助函数 ──
 
@@ -96,7 +109,7 @@ class FrameQueue {
   private frames: FrameEntry[] = []
   private maxSize: number
 
-  constructor(maxSize = 5) {
+  constructor(maxSize = 200) {
     this.maxSize = maxSize
   }
 
@@ -108,24 +121,36 @@ class FrameQueue {
     this.frames.push(entry)
   }
 
-  /** 获取当前时间戳应显示的帧 */
+  /** 获取当前时间戳应显示的帧（二分查找，O(log n)） */
   getCurrentFrame(timestamp: number): VideoFrame | null {
-    let best: FrameEntry | null = null
+    if (this.frames.length === 0) return null
-    let bestIdx = -1
+
-    for (let i = 0; i < this.frames.length; i++) {
+    const target = timestamp + 0.01
-      const f = this.frames[i]
+
-      if (f.pts <= timestamp + 0.01) {
+    // 找到最后一个 pts <= target 的帧（右边界）
-        best = f
+    let lo = 0,
-        bestIdx = i
+      hi = this.frames.length - 1,
+      bestIdx = -1
+    while (lo <= hi) {
+      const mid = (lo + hi) >> 1
+      if (this.frames[mid].pts <= target) {
+        bestIdx = mid
+        lo = mid + 1
+      } else {
+        hi = mid - 1
       }
     }
+
+    if (bestIdx < 0) return null
+
+    // 关闭并移除 bestIdx 之前的所有已播放帧
     for (let i = 0; i < bestIdx; i++) {
       this.frames[i].frame.close()
     }
-    if (bestIdx >= 0) {
+    this.frames.splice(0, bestIdx)
-      this.frames = this.frames.slice(bestIdx)
+
-    }
+    // 此时 bestIdx 对应帧已在索引 0
-    return best?.frame ?? null
+    return this.frames[0]?.frame ?? null
   }
 
   clear() {
@@ -172,6 +197,10 @@ export interface CanvasPlayerState {
   duration: number
   isReady: boolean
   isBuffering: boolean
+  /** WebCodecs 解码失败时为 true，调用方应 fallback 到原生 video 播放 */
+  hasDecodeError: boolean
+  /** 解码错误信息（用于 UI 展示） */
+  errorMessage: string
 }
 
 export interface CanvasPlayerControls {
@@ -209,21 +238,29 @@ export function useCanvasPlayer(
     stroke?: boolean
     shadow?: boolean
   },
+  onError?: (error: Error) => void,
+  enabled: boolean = true,
 ) {
   const [state, setState] = useState<CanvasPlayerState>({
-    hasSupport: isWebCodecsSupported(),
+    hasSupport: enabled && isWebCodecsSupported(),
     isPlaying: false,
     currentTime: 0,
     duration: 0,
     isReady: false,
     isBuffering: false,
+    hasDecodeError: false,
+    errorMessage: "",
   })
 
   // ── 内部引用 ──
   const decoderRef = useRef<VideoDecoder | null>(null)
-  const frameQueueRef = useRef(new FrameQueue(600))
+  const frameQueueRef = useRef(new FrameQueue(200))
-  /** 已解码的片段索引集合，用于按需解码（先标记防重入，失败时移除允许重试） */
+  /** 每个片段持久化解码器，避免每次新建导致关键帧错误 */
-  const decodedSegmentsRef = useRef(new Set<number>())
+  const segmentDecodersRef = useRef(new Map<number, VideoDecoder>())
+  /** 每个片段已送入解码器的 sample 游标（用于续解码） */
+  const segmentSampleCursorRef = useRef(new Map<number, number>())
+  /** 后台补充解码是否正在运行（防重入） */
+  const isFeedingRef = useRef(false)
   /** 解码代数计数器，seek 时递增以作废正在进行的异步解码 */
   const decodeGenerationRef = useRef(0)
   const rafRef = useRef<number>(0)
@@ -234,6 +271,8 @@ export function useCanvasPlayer(
   const videoDimRef = useRef<{ width: number; height: number }>({ width: 0, height: 0 })
   const isDestroyedRef = useRef(false)
   const lastProgressUpdateRef = useRef<number>(0)
+  const onErrorRef = useRef(onError)
+  onErrorRef.current = onError
 
   // 计算总时长
   const totalDuration = segments.reduce((sum, seg) => sum + (seg.endTime - seg.startTime), 0)
@@ -367,7 +406,7 @@ export function useCanvasPlayer(
             globalEndTime: globalStart + (segment.endTime - segment.startTime),
             trackId: videoTrack.id ?? 1,
             timescale: videoTrack.timescale ?? 90000,
-            codec: videoTrack.codec ?? "avc1.42E01E",
+            codec: normalizeCodecString(videoTrack.codec ?? "avc1.42E01E"),
             videoWidth: videoTrack.track_width || 1280,
             videoHeight: videoTrack.track_height || 720,
             description,
@@ -451,87 +490,91 @@ export function useCanvasPlayer(
     [segments, extractCodecDescription],
   )
 
-  // ── 初始化 VideoDecoder 并解码指定片段 ──
+  // ── 解码片段的一批帧（使用持久化解码器，支持从断点续解码） ──
-  const decodeSegment = useCallback(
+  /**
-    async (_buffer: ArrayBuffer, meta: SegmentMeta, maxFrames?: number): Promise<void> => {
+   * @param segIdx 片段索引
-      if (isDestroyedRef.current) return
+   * @param maxFrames 本次最多解码多少帧
+   */
+  const decodeSegmentBatch = useCallback(
+    async (segIdx: number, maxFrames: number = 60): Promise<number> => {
+      if (isDestroyedRef.current) return 0
+      const metas = segmentMetaRef.current
+      const meta = metas[segIdx]
+      if (!meta) return 0
+      const buffer = segmentDataRef.current.get(meta.assetId)
+      if (!buffer) return 0
 
-      let decoderReady = false
+      const gen = decodeGenerationRef.current
+      let decoder = segmentDecodersRef.current.get(segIdx)
+      let cursor = segmentSampleCursorRef.current.get(segIdx) ?? 0
+      const samples = meta.samples
 
-      // 配置解码器（每个片段可能需要不同的 codec/分辨率）
+      // 如果还没有解码器，新建一个（从关键帧开始，不会报 key frame 错误）
-      const decoder = new VideoDecoder({
+      if (!decoder || decoder.state === "closed") {
-        output: (frame: VideoFrame) => {
+        decoder = new VideoDecoder({
-          // 从第一帧获取实际尺寸
+          output: (frame: VideoFrame) => {
-          if (videoDimRef.current.width === 0 || videoDimRef.current.height === 0) {
+            if (videoDimRef.current.width === 0 || videoDimRef.current.height === 0) {
-            videoDimRef.current = { width: frame.codedWidth, height: frame.codedHeight }
+              videoDimRef.current = { width: frame.codedWidth, height: frame.codedHeight }
-            console.log(
+            }
-              `[useCanvasPlayer] Actual frame size: ${frame.codedWidth}x${frame.codedHeight}`,
+            const localTime = frame.timestamp / 1_000_000
-            )
+            const globalTime = localTime + meta.globalStartTime
-          }
+            frameQueueRef.current.push({
-          const localTime = frame.timestamp / 1_000_000
+              frame,
-          const globalTime = localTime + meta.globalStartTime
+              pts: globalTime,
-          frameQueueRef.current.push({
+              duration: (frame.duration ?? 0) / 1_000_000,
-            frame,
+            })
-            pts: globalTime,
+          },
-            duration: (frame.duration ?? 0) / 1_000_000,
+          error: (e: DOMException) => {
-          })
+            console.error(`[useCanvasPlayer] Segment ${segIdx} decoder error:`, e)
-        },
+            // 重置该片段的解码器和游标，允许重试
-        error: (e: DOMException) => {
+            segmentDecodersRef.current.delete(segIdx)
-          console.error("[useCanvasPlayer] Decoder error:", e)
+            segmentSampleCursorRef.current.set(segIdx, 0)
-        },
+          },
-      })
-
-      console.log("[useCanvasPlayer] configure:", {
-        codec: meta.codec,
-        description: meta.description,
-        descriptionByteLength: meta.description?.byteLength,
-        videoWidth: meta.videoWidth,
-        videoHeight: meta.videoHeight,
-      })
-
-      try {
-        await decoder.configure({
-          codec: meta.codec,
-          ...(meta.description ? { description: meta.description } : {}),
         })
-        decoderRef.current = decoder
+
-        decoderReady = true
+        try {
-        // 标记缓冲结束，让 UI 开始渲染
+          await decoder.configure({
+            codec: meta.codec,
+            ...(meta.description ? { description: meta.description } : {}),
+          })
+        } catch (err) {
+          console.error(`[useCanvasPlayer] Segment ${segIdx} configure failed:`, err)
+          const error = err instanceof Error ? err : new Error(String(err))
+          setState((s) => ({
+            ...s,
+            isBuffering: false,
+            hasDecodeError: true,
+            errorMessage: `视频解码失败: ${error.message || "不支持的编解码器"}`,
+          }))
+          onErrorRef.current?.(error)
+          return 0
+        }
+
+        segmentDecodersRef.current.set(segIdx, decoder)
+        cursor = 0
+        // 标记缓冲结束
         setState((s) => ({ ...s, isBuffering: false }))
-      } catch (err) {
-        console.error("[useCanvasPlayer] Decoder configure failed for segment:", err)
-        return
       }
 
-      if (!decoderReady) return
+      if (decoder.state !== "configured") return 0
 
-      // 使用 demuxSegment 中已提取并过滤的 samples（前端切片）
+      // 从 cursor 继续喂 sample（流水线批量提交，不 await 单个 decode）
-      const samplesCollected = meta.samples
+      let decoded = 0
-      console.log(
+      let si = cursor
-        `[useCanvasPlayer] Segment ${meta.assetId}: ${samplesCollected.length} samples to decode`,
+      while (si < samples.length && decoded < maxFrames) {
-      )
+        if (decodeGenerationRef.current !== gen || isDestroyedRef.current) break
-      if (samplesCollected.length === 0) {
+        if ((decoder.state as string) === "closed") break
-        console.warn("[useCanvasPlayer] No samples to decode for segment", meta.assetId)
+        // 帧队列快满时停止提交（这才是真正的背压）
-        return
+        if (frameQueueRef.current.size >= 180) break
-      }
+        // 解码器内部队列积压过多时短暂让出线程（阈值64，给硬件足够流水线深度）
-
+        if (decoder.decodeQueueSize > 64) {
-      // 送入解码器
+          await new Promise((r) => setTimeout(r, 5))
-      let decodedCount = 0
-      let skippedCount = 0
-      let decodeErrors = 0
-      for (const sample of samplesCollected) {
-        if (!sample.data || isDestroyedRef.current) {
-          skippedCount++
           continue
         }
-        if (decoder.state === "closed") break
+
-        // 初始化阶段限制解码帧数，避免帧缓冲溢出
+        const sample = samples[si]
-        if (maxFrames && decodedCount >= maxFrames) {
+        si++
-          console.log(
+        if (!sample.data) continue
-            `[useCanvasPlayer] Segment ${meta.assetId}: init decode limited to ${maxFrames} frames`,
-          )
-          break
-        }
 
         const chunk = new EncodedVideoChunk({
           type: sample.is_sync ? "key" : "delta",
@@ -541,85 +584,73 @@ export function useCanvasPlayer(
         })
 
         try {
-          await decoder.decode(chunk) // 修复：await 捕获异步错误
+          decoder.decode(chunk)
-          decodedCount++
+          decoded++
         } catch (e) {
-          decodeErrors++
+          console.warn(`[useCanvasPlayer] Segment ${segIdx} decode error:`, e)
-          console.warn(`[useCanvasPlayer] Decode chunk error (${decodeErrors}):`, e)
+          break
-          // 连续 3 次解码失败，放弃当前片段
+        }
-          if (decodeErrors >= 3) {
+      }
-            console.error("[useCanvasPlayer] Too many decode errors, aborting segment")
+
-            break
+      cursor = si
-          }
+      segmentSampleCursorRef.current.set(segIdx, cursor)
+      // 等待解码器输出帧（最多500ms）
+      if (decoded > 0 && (decoder.state as string) === "configured") {
+        let waited = 0
+        while (frameQueueRef.current.size < Math.min(decoded, 10) && waited < 500) {
+          await new Promise((r) => setTimeout(r, 20))
+          waited += 20
+          if (isDestroyedRef.current) break
         }
       }
       console.log(
-        `[useCanvasPlayer] Segment ${meta.assetId}: decoded ${decodedCount}, skipped ${skippedCount}, errors ${decodeErrors}, decoder.state=${decoder.state}`,
+        `[useCanvasPlayer] Segment ${segIdx} decoded ${decoded} frames, queue size: ${frameQueueRef.current.size}`,
       )
-
+      return decoded
-      // flush 仅在解码器状态正常时执行
-      if (decoder.state === "configured") {
-        try {
-          await decoder.flush()
-          console.log(`[useCanvasPlayer] Segment ${meta.assetId}: flush complete`)
-        } catch (e) {
-          console.warn("[useCanvasPlayer] Decoder flush error:", e)
-        }
-      }
     },
     [],
   )
 
+  // ── 后台持续补充帧 ──
   /**
-   * 按需解码当前播放位置 ±1 个片段。
+   * 根据当前播放时间，确保队列中有足够缓冲
-   * 在渲染循环中定期调用，避免一次性解码所有片段导致环形缓冲区溢出丢帧。
+   * 播放循环每 200ms 调用一次
-   * 使用"先标记再解码"模式防止并发重复解码，失败时移除标记允许重试。
    */
-  const decodeAroundPosition = useCallback(
+  const feedFrames = useCallback(
     async (currentTime: number) => {
-      const metas = segmentMetaRef.current
+      if (isFeedingRef.current) return
-      if (!metas || metas.length === 0) return
+      isFeedingRef.current = true
+      try {
+        const metas = segmentMetaRef.current
+        if (!metas || metas.length === 0) return
 
-      // 记录当前代数，seek 后代数变化则中止
+        // 队列帧数充足时不解码（目标：保持 >= 80 帧缓冲）
-      const gen = decodeGenerationRef.current
+        if (frameQueueRef.current.size >= 80) return
 
-      let targetIdx = -1
+        // 找到当前播放的片段
-      let acc = 0
+        let targetIdx = 0
-      for (let i = 0; i < metas.length; i++) {
+        let acc = 0
-        const dur = metas[i].globalEndTime - metas[i].globalStartTime
+        for (let i = 0; i < metas.length; i++) {
-        if (currentTime < acc + dur) {
+          const dur = metas[i].globalEndTime - metas[i].globalStartTime
-          targetIdx = i
+          if (currentTime < acc + dur) {
-          break
+            targetIdx = i
+            break
+          }
+          acc += dur
         }
-        acc += dur
-      }
-      if (targetIdx === -1) targetIdx = metas.length - 1
 
-      for (
+        // 依次补充：当前片段 → 下一个片段 → 再下一个
-        let i = Math.max(0, targetIdx - 1);
+        for (let offset = 0; offset <= 2; offset++) {
-        i <= Math.min(metas.length - 1, targetIdx + 1);
+          const idx = targetIdx + offset
-        i++
+          if (idx >= metas.length) break
-      ) {
+          if (frameQueueRef.current.size >= 180) break
-        // seek 已作废当前解码任务
+          await decodeSegmentBatch(idx, 60)
-        if (decodeGenerationRef.current !== gen) return
-        if (decodedSegmentsRef.current.has(i)) continue
-        const meta = metas[i]
-        const buffer = segmentDataRef.current.get(meta.assetId)
-        if (!buffer) continue
-        // 先标记为解码中，防止下一帧渲染时重复发起解码
-        decodedSegmentsRef.current.add(i)
-        try {
-          await decodeSegment(buffer, meta, 300)
-        } catch (e) {
-          // 解码失败则移除标记，允许后续重试
-          decodedSegmentsRef.current.delete(i)
-          console.warn(`[useCanvasPlayer] 按需解码片段 ${i} 失败:`, e)
         }
-        // await 后再次检查代数，seek 期间不更新标记
+      } finally {
-        if (decodeGenerationRef.current !== gen) return
+        isFeedingRef.current = false
       }
     },
-    [decodeSegment],
+    [decodeSegmentBatch],
   )
 
   // ── 标题绘制 ──
@@ -636,7 +667,6 @@ export function useCanvasPlayer(
 
       // 按 "/" 分割为多行（"/" 作为手动换行符）
       const lines = title.text.split(/[/／⁄∕]/)
-      console.log("[drawTitle] 原始标题:", JSON.stringify(title.text), "分割后:", lines)
       const lineHeight = fontSize * 1.3
       const totalHeight = lines.length * lineHeight
 
@@ -748,8 +778,10 @@ export function useCanvasPlayer(
         }
         return s
       })
-      // 按需解码当前 ±1 片段
+      // 后台补充帧：队列不足时自动续解码
-      decodeAroundPosition(currentTime)
+      if (frameQueueRef.current.size < 80) {
+        void feedFrames(currentTime)
+      }
     }
 
     if (currentTime >= totalDuration) {
@@ -758,29 +790,46 @@ export function useCanvasPlayer(
     }
 
     rafRef.current = requestAnimationFrame(renderFrame)
-  }, [canvasRef, totalDuration, titleSettings, drawTitle, computeDrawRect, decodeAroundPosition])
+  }, [canvasRef, totalDuration, titleSettings, drawTitle, computeDrawRect, feedFrames])
 
   // ── 播放控制 ──
   const play = useCallback(async () => {
     if (!state.hasSupport || isDestroyedRef.current) return
 
-    // 重播场景：currentTime 已回到起点但 decodedSegmentsRef 仍有旧标记
+    // 重播：必须关闭旧解码器、清空队列、重置游标，从头重新解码
-    // 此时 FrameQueue 中旧帧已被淘汰，需清空标记让 decodeAroundPosition 重新解码
+    if (state.currentTime >= totalDuration - 0.1 || state.currentTime <= 0.1) {
-    if (state.currentTime <= 0.1 && decodedSegmentsRef.current.size > 0) {
       decodeGenerationRef.current++
-      decodedSegmentsRef.current.clear()
+      // 关闭所有持久化解码器
-      // 同步清空帧缓冲，避免旧帧残留导致 getCurrentFrame 返回 null
+      for (const d of segmentDecodersRef.current.values()) {
+        try {
+          if (d.state !== "closed") d.close()
+        } catch {
+          /* noop */
+        }
+      }
+      segmentDecodersRef.current.clear()
+      segmentSampleCursorRef.current.clear()
       frameQueueRef.current.clear()
+      playStartOffsetRef.current = 0
+      setState((s) => ({ ...s, currentTime: 0 }))
+      // 重新初始化解码
+      const metas = segmentMetaRef.current
+      const initialDecodeCount = Math.min(metas.length, 2)
+      for (let i = 0; i < initialDecodeCount; i++) {
+        await decodeSegmentBatch(i, 60)
+      }
     }
 
     setState((s) => ({ ...s, isPlaying: true }))
     playStartRef.current = performance.now()
-    playStartOffsetRef.current = state.currentTime
+    if (state.currentTime < 0.1) {
+      playStartOffsetRef.current = 0
+    } else {
+      playStartOffsetRef.current = state.currentTime
+    }
     lastProgressUpdateRef.current = 0
     rafRef.current = requestAnimationFrame(renderFrame)
-    // 立即触发一次按需解码，不等渲染循环 200ms 节流
+  }, [state.hasSupport, state.currentTime, totalDuration, renderFrame, decodeSegmentBatch])
-    decodeAroundPosition(state.currentTime)
-  }, [state.hasSupport, state.currentTime, renderFrame, decodeAroundPosition])
 
   const pause = useCallback(() => {
     setState((s) => ({ ...s, isPlaying: false }))
@@ -790,33 +839,61 @@ export function useCanvasPlayer(
   const seek = useCallback(
     async (time: number) => {
       const clampedTime = Math.max(0, Math.min(time, totalDuration))
+      decodeGenerationRef.current++
+      // 关闭所有解码器、清空队列、重置游标
+      for (const d of segmentDecodersRef.current.values()) {
+        try {
+          if (d.state !== "closed") d.close()
+        } catch {
+          /* noop */
+        }
+      }
+      segmentDecodersRef.current.clear()
+      segmentSampleCursorRef.current.clear()
+      frameQueueRef.current.clear()
       setState((s) => ({ ...s, currentTime: clampedTime }))
       playStartOffsetRef.current = clampedTime
       playStartRef.current = performance.now()
-      // seek 时递增解码代数，作废正在进行的异步解码
+      // 找到 seek 目标片段，从该片段开始解码
-      decodeGenerationRef.current++
+      const metas = segmentMetaRef.current
-      // 清空帧队列（clear 内部会 close 所有帧）+ 清空已解码标记
+      let targetIdx = 0,
-      frameQueueRef.current.clear()
+        acc = 0
-      decodedSegmentsRef.current.clear()
+      for (let i = 0; i < metas.length; i++) {
-      await decodeAroundPosition(clampedTime)
+        const dur = metas[i].globalEndTime - metas[i].globalStartTime
+        if (clampedTime < acc + dur) {
+          targetIdx = i
+          break
+        }
+        acc += dur
+      }
+      await decodeSegmentBatch(targetIdx, 60)
+      await decodeSegmentBatch(Math.min(targetIdx + 1, metas.length - 1), 60)
     },
-    [totalDuration, decodeAroundPosition],
+    [totalDuration, decodeSegmentBatch],
   )
 
   const destroy = useCallback(() => {
     isDestroyedRef.current = true
     cancelAnimationFrame(rafRef.current)
 
+    // 关闭所有持久化解码器
+    for (const d of segmentDecodersRef.current.values()) {
+      try {
+        if (d.state !== "closed") d.close()
+      } catch {
+        /* noop */
+      }
+    }
+    segmentDecodersRef.current.clear()
+    segmentSampleCursorRef.current.clear()
+
     if (decoderRef.current && decoderRef.current.state !== "closed") {
       decoderRef.current.close()
     }
 
-    // 递增代数中止进行中的异步解码，清空帧队列（clear 内部 close 所有帧）
-    decodeGenerationRef.current++
     frameQueueRef.current.clear()
     segmentDataRef.current.clear()
     segmentMetaRef.current = []
-    decodedSegmentsRef.current.clear()
   }, [])
 
   // ── 预加载下一个片段的数据 ──
@@ -833,6 +910,7 @@ export function useCanvasPlayer(
 
   // ── 初始化：加载并解码所有片段 ──
   useEffect(() => {
+    if (!enabled) return
     if (!state.hasSupport || segments.length === 0) {
       console.log("[useCanvasPlayer] Skip init:", {
         hasSupport: state.hasSupport,
@@ -842,10 +920,24 @@ export function useCanvasPlayer(
     }
 
     let cancelled = false
-    console.log("[useCanvasPlayer] Init start, segments:", segments.length)
 
     const init = async () => {
-      setState((s) => ({ ...s, isBuffering: true }))
+      // ✅ 关键修复：重置销毁标记，允许新的 init 周期正常工作
+      // destroy() 在 useEffect cleanup 中被调用，将 isDestroyedRef 设为 true
+      // 如果不重置，后续的 loadSegment / decodeSegment 会立即 return
+      isDestroyedRef.current = false
+      // ✅ Strict Mode 修复：init 不再递增 generation
+      // seek() 和 play() 仍保留 generation 递增用于中止异步解码
+      // 重置错误状态，避免上一轮的解码错误影响新的 init 周期
+      setState((s) => ({
+        ...s,
+        isBuffering: true,
+        hasDecodeError: false,
+        errorMessage: "",
+        isReady: false,
+      }))
+
+      console.log("[useCanvasPlayer] Init start v2_DIAG, segments:", segments.length)
 
       // 1. 加载所有片段数据
       for (const seg of segments) {
@@ -887,32 +979,44 @@ export function useCanvasPlayer(
 
       segmentMetaRef.current = metas
 
-      // 3. 按需解码：初始只解码前 3 个片段，后续通过 decodeAroundPosition 动态加载
+      // 3. 初始化解码：关闭旧解码器，前 2 个片段各解 60 帧
-      //    避免一次性全量解码导致 frameQueue 环形缓冲区旧帧被丢弃引发黑屏
+      //    后续由 feedFrames 后台补充
-      decodedSegmentsRef.current.clear()
+      for (const d of segmentDecodersRef.current.values()) {
-      const initGen = decodeGenerationRef.current
-      const initialDecodeCount = Math.min(metas.length, 3)
-      for (let i = 0; i < initialDecodeCount; i++) {
-        if (cancelled) break
-        // seek 或 destroy 已作废当前初始化
-        if (decodeGenerationRef.current !== initGen) break
-        const meta = metas[i]
-        const buffer = segmentDataRef.current.get(meta.assetId)
-        if (!buffer) continue
-        // 先标记为解码中，防止重复解码
-        decodedSegmentsRef.current.add(i)
         try {
-          await decodeSegment(buffer, meta, MAX_INIT_FRAMES)
+          if (d.state !== "closed") d.close()
-        } catch (e) {
+        } catch {
-          // 解码失败则移除标记，允许后续重试
+          /* noop */
-          decodedSegmentsRef.current.delete(i)
-          console.warn(`[useCanvasPlayer] 初始化解码片段 ${i} 失败:`, e)
         }
       }
+      segmentDecodersRef.current.clear()
+      segmentSampleCursorRef.current.clear()
+      frameQueueRef.current.clear()
+
+      const initGen = decodeGenerationRef.current
+      const initialDecodeCount = Math.min(metas.length, 2)
+      console.log(
+        `[useCanvasPlayer] Starting init decode: ${initialDecodeCount} segments, metas: ${metas.length}`,
+      )
+      for (let i = 0; i < initialDecodeCount; i++) {
+        if (cancelled) break
+        if (decodeGenerationRef.current !== initGen) break
+        console.log(`[DIAG_v2] Init decode segment ${i}...`)
+        try {
+          await decodeSegmentBatch(i, 60)
+          console.log(`[DIAG_v2] Init decode segment ${i} done`)
+        } catch (e) {
+          console.warn(`[useCanvasPlayer] 初始化解码片段 ${i} 失败:`, e)
+        }
+        if (cancelled) break
+      }
+
+      console.log(`[useCanvasPlayer] Init decode finished, cancelled:`, cancelled)
 
       if (!cancelled) {
-        console.log("[useCanvasPlayer] Init complete, isReady = true")
+        console.log("[useCanvasPlayer] Init complete, isReady = true, duration:", totalDuration)
         setState((s) => ({ ...s, duration: totalDuration, isReady: true, isBuffering: false }))
+      } else {
+        console.warn("[useCanvasPlayer] Init was cancelled before completion")
       }
     }
 

apps/web/src/pages/generate/hooks/useDraftAutoSave.ts

@@ -0,0 +1,124 @@
+/**
+ * 草稿自动保存工具 Hook
+ *
+ * 背景：后端 PUT /templates/{id}/editor 的 config 是「整体替换」语义，
+ * 直接发送 { config: { asset_ids } } 会把 title 等其他字段覆盖掉。
+ * 本 Hook 统一执行「GET 当前 config → 浅合并新字段 → PUT 回去」，
+ * 并用串行队列 + AbortController 保证：
+ *   - 同一时刻只有一个保存请求在飞
+ *   - 快速连续变化时只提交最后一次
+ *   - 组件卸载时取消未完成请求
+ *   - 保存失败时保留补丁，自动重试（指数退避，最多 5 次）
+ *
+ * 保存失败只 console.warn，不弹窗、不阻塞。
+ */
+import { useCallback, useEffect, useRef } from "react"
+import { getEditPlan, updateEditPlan } from "@/api/template-editor"
+
+type ConfigPatch = Record<string, unknown>
+
+/** 最大自动重试次数 */
+const MAX_RETRIES = 5
+/** 初始重试延迟（ms），每次翻倍 */
+const BASE_RETRY_DELAY = 1000
+
+export function useDraftAutoSave(templateId?: string) {
+  const timerRef = useRef<ReturnType<typeof setTimeout>>()
+  const abortRef = useRef<AbortController | null>(null)
+  // 待合并的补丁队列（解决「保存进行中又来了新变化」）
+  const pendingPatchRef = useRef<ConfigPatch | null>(null)
+  const savingRef = useRef(false)
+  const templateIdRef = useRef(templateId)
+  templateIdRef.current = templateId
+
+  const flush = useCallback(async (retryCount = 0) => {
+    const tid = templateIdRef.current
+    if (!tid) return
+    // 已有保存在飞：把新补丁暂存，等当前请求结束后再合并一次
+    if (savingRef.current) return
+
+    // 快照当前补丁，但先不清空 —— 成功后才清除，失败时保留以便重试
+    const patchToSave = pendingPatchRef.current
+    if (!patchToSave) {
+      savingRef.current = false
+      return
+    }
+    savingRef.current = true
+
+    const controller = new AbortController()
+    abortRef.current = controller
+    try {
+      // 1. 读当前 config（拿最新，避免覆盖别人/别的步骤写入的字段）
+      const current = await getEditPlan(tid)
+      if (controller.signal.aborted) return
+      const merged = { ...(current.config || {}), ...patchToSave }
+      // 2. 写回完整合并后的 config
+      await updateEditPlan(tid, { config: merged }, controller.signal)
+      // 3. 保存成功才清除已保存的补丁
+      //    （保存期间可能有新补丁进来，只清除我们已经保存的部分）
+      pendingPatchRef.current = null
+    } catch (err) {
+      const name = (err as { name?: string })?.name
+      if (name === "CanceledError" || name === "AbortError") {
+        // 组件卸载或新请求取消，不重试
+        return
+      }
+      console.warn("[useDraftAutoSave] 自动保存草稿失败:", err)
+
+      // 保存失败：把本次尝试保存的补丁合并回 pendingPatchRef
+      // （保存期间可能有新补丁，新补丁优先）
+      pendingPatchRef.current = {
+        ...patchToSave,
+        ...(pendingPatchRef.current || {}),
+      }
+
+      // 指数退避重试
+      if (retryCount < MAX_RETRIES && !controller.signal.aborted) {
+        const delay = BASE_RETRY_DELAY * Math.pow(2, retryCount)
+        timerRef.current = setTimeout(() => {
+          void flush(retryCount + 1)
+        }, delay)
+      }
+      // 超过最大重试次数后，补丁仍保留在 pendingPatchRef 中，
+      // 下次 scheduleSave 触发时会一起带上
+    } finally {
+      savingRef.current = false
+      // 保存期间又积累了新变化（且不是在重试路径中），再触发一次
+      if (pendingPatchRef.current && !controller.signal.aborted && retryCount === 0) {
+        timerRef.current = setTimeout(() => {
+          void flush()
+        }, 50)
+      }
+    }
+  }, [])
+
+  /**
+   * 调度一次自动保存（防抖）
+   * @param patch 要合并进 config 的局部字段
+   * @param delay 防抖毫秒数
+   */
+  const scheduleSave = useCallback(
+    (patch: ConfigPatch, delay = 500) => {
+      const tid = templateIdRef.current
+      if (!tid) return
+      if (timerRef.current) clearTimeout(timerRef.current)
+      // 累计补丁（同一周期内多次变化合并成一次写入）
+      pendingPatchRef.current = { ...(pendingPatchRef.current || {}), ...patch }
+      timerRef.current = setTimeout(() => {
+        void flush()
+      }, delay)
+    },
+    [flush],
+  )
+
+  useEffect(() => {
+    return () => {
+      if (timerRef.current) clearTimeout(timerRef.current)
+      if (abortRef.current) abortRef.current.abort()
+    }
+  }, [])
+
+  return { scheduleSave }
+}
+
+export default useDraftAutoSave

apps/web/src/pages/generate/hooks/useGenerateFormState/index.ts

@@ -14,6 +14,7 @@ import { useTemplateSelection } from "./useTemplateSelection"
 import { useTitleCoverSync } from "./useTitleCoverSync"
 import { useVoiceState } from "./useVoiceState"
 import { usePlanConfigLoader } from "./usePlanConfigLoader"
+import { usePersistedState } from "../usePersistedState"
 
 const DEFAULT_TITLE_SETTINGS: TitleSettings = {
   aiAutoSelect: false,
@@ -82,11 +83,27 @@ export interface GenerateFormState {
   editPlanId: string | null
   planConfigStr: string | null
 
+  /**
+   * 传给 Worker 的 source_edit_plan_id。
+   * 仅使用 URL 中的 edit_plan_id（从剪辑模板编辑器跳转时携带）。
+   * URL 没有时传 null，后端正式生成 API 会通过 template_id+user_id 兜底查找正确的 plan。
+   * 注意：selectedTemplate 是模板 ID，不是 edit_plan_id，不能作为此值传递。
+   */
+  sourceEditPlanId: string | null
+
   /* 预览弹窗 */
   previewVideo: GeneratedVideo | null
   setPreviewVideo: (v: GeneratedVideo | null) => void
   previewModalOpen: boolean
   setPreviewModalOpen: (open: boolean) => void
+
+  /** 预览任务 ID（由 useStep6Cover 创建后写入，供 useGenerateVideo 复用） */
+  previewTaskId: string | null
+  setPreviewTaskId: (id: string | null) => void
+
+  /** 从预览响应中提取的 source_edit_plan_id（供 fallback 路径使用） */
+  storedSourceEditPlanId: string | null
+  setStoredSourceEditPlanId: (planId: string | null) => void
 }
 
 export const useGenerateFormState = (): GenerateFormState => {
@@ -100,6 +117,11 @@ export const useGenerateFormState = (): GenerateFormState => {
   /* ── 模板选择 ── */
   const { selectedTemplate, setSelectedTemplate, userTemplates } = useTemplateSelection()
 
+  /* ── source_edit_plan_id：仅取 URL 参数，无则 null 让后端兜底 ── */
+  // selectedTemplate 是模板 ID 而非 edit_plan_id，不能混淆；
+  // 后端正式生成 API 会在 source_edit_plan_id 为空时通过 template_id+user_id 自动关联。
+  const sourceEditPlanId = editPlanId || null
+
   /* ── 素材 ── */
   const [selectedMaterials, setSelectedMaterials] = useState<string[]>([])
   const [materialMode, setMaterialMode] = useState<"manual" | "auto">("manual")
@@ -147,6 +169,30 @@ export const useGenerateFormState = (): GenerateFormState => {
   const [previewVideo, setPreviewVideo] = useState<GeneratedVideo | null>(null)
   const [previewModalOpen, setPreviewModalOpen] = useState(false)
 
+  /* ── 预览任务 ID（useStep6Cover 创建预览时写入，useGenerateVideo 复用） ── */
+  // 持久化到 localStorage，key 按 editPlanId/templateId 区分，刷新页面后可恢复
+  const previewStorageKey = editPlanId
+    ? `preview_task_id_${editPlanId}`
+    : selectedTemplate
+      ? `preview_task_id_tpl_${selectedTemplate}`
+      : null
+  const [previewTaskId, setPreviewTaskId] = usePersistedState<string | null>(
+    previewStorageKey,
+    null,
+  )
+
+  /* ── 从预览响应中提取的 source_edit_plan_id（供 fallback 路径使用） ── */
+  // 持久化到 localStorage，刷新页面后 fallback 路径仍能正确传递 source_edit_plan_id
+  const planIdStorageKey = editPlanId
+    ? `source_edit_plan_id_${editPlanId}`
+    : selectedTemplate
+      ? `source_edit_plan_id_tpl_${selectedTemplate}`
+      : null
+  const [storedSourceEditPlanId, setStoredSourceEditPlanId] = usePersistedState<string | null>(
+    planIdStorageKey,
+    null,
+  )
+
   /* ── 从 URL / 编辑计划加载配置 ── */
   usePlanConfigLoader({
     editPlanId,
@@ -189,10 +235,15 @@ export const useGenerateFormState = (): GenerateFormState => {
     autoSubtitles,
     bgm,
     editPlanId,
+    sourceEditPlanId,
     planConfigStr,
     previewVideo,
     setPreviewVideo,
     previewModalOpen,
     setPreviewModalOpen,
+    previewTaskId,
+    setPreviewTaskId,
+    storedSourceEditPlanId,
+    setStoredSourceEditPlanId,
   }
 }

apps/web/src/pages/generate/hooks/useGenerateVideo.ts

@@ -10,10 +10,11 @@ import type { UseGenerateVideoProps } from "./generate-video/types"
 import { getGenerationPhase } from "./generate-video/phase"
 import { useGenerationPolling } from "./generate-video/useGenerationPolling"
 import { validateGenerateInputs } from "./generate-video/buildPayload"
+import { calculateResolution } from "../utils/calculateResolution"
 import { extractBackendError, translateError } from "./generate-video/errorUtils"
 
 export function useGenerateVideo(props: UseGenerateVideoProps) {
-  const { selectedTemplate } = props
+  const { selectedTemplate, onGenerationSuccess } = props
 
   /* ── 生成状态 ── */
   const [generating, setGenerating] = useState(false)
@@ -23,18 +24,22 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
   const [generatedVideos, setGeneratedVideos] = useState<GeneratedVideo[]>([])
 
   const handleProgress = useCallback((p: number) => setProgress(p), [])
-  const handleComplete = useCallback((videos: unknown[]) => {
+  const handleComplete = useCallback(
-    setGenerating(false)
+    (videos: unknown[]) => {
-    setGenerated(true)
+      setGenerating(false)
-    setGeneratedVideos(videos as GeneratedVideo[])
+      setGenerated(true)
-  }, [])
+      setGeneratedVideos(videos as GeneratedVideo[])
+      // 生成成功后清除持久化的预览状态，避免下次进入复用旧任务
+      onGenerationSuccess?.()
+    },
+    [onGenerationSuccess],
+  )
   const handleFailed = useCallback((errorMsg: string) => {
     setGenerating(false)
     setGenerateError(errorMsg)
   }, [])
 
   const { startPolling, clearTimer } = useGenerationPolling({
-    templateId: selectedTemplate,
     onProgress: handleProgress,
     onComplete: handleComplete,
     onFailed: handleFailed,
@@ -55,51 +60,40 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
     clearTimer()
 
     try {
-      // 解析分辨率
+      // 解析分辨率（共享工具函数）
-      const ratio = props.videoRatio || "9:16"
+      const { width: outputWidth, height: outputHeight } = calculateResolution(
-      let outputWidth: number
+        props.videoRatio || "9:16",
-      let outputHeight: number
+      )
-
-      if (ratio.includes(":")) {
-        const [rw, rh] = ratio.split(":").map(Number)
-        if (rw > 0 && rh > 0) {
-          const [longSide, shortSide] = rw < rh ? [rh, rw] : [rw, rh]
-          const baseLong = 1920
-          const baseShort = Math.round((baseLong * shortSide) / longSide)
-          const evenShort = baseShort - (baseShort % 2)
-          if (rw < rh) {
-            outputWidth = evenShort
-            outputHeight = baseLong
-          } else {
-            outputWidth = baseLong
-            outputHeight = evenShort
-          }
-        } else {
-          outputWidth = 1080
-          outputHeight = 1920
-        }
-      } else if (ratio.includes("x")) {
-        const [wStr, hStr] = ratio.split("x")
-        outputWidth = parseInt(wStr, 10) || 1080
-        outputHeight = parseInt(hStr, 10) || 1920
-      } else {
-        outputWidth = 1080
-        outputHeight = 1920
-      }
 
       const assetIds =
         props.materialMode === "auto" ? props.smartSelectedIds : props.selectedMaterials
 
-      // 直接创建正式生成任务
+      // 封面 URL：优先 AI 生成缩略图，兜底用户上传
-      await createGenerationTask({
+      const coverUrl = props.coverSettings?.thumbnail_url || props.coverSettings?.upload_url || ""
+
+      // 解析配音参数：voiceMode=clone 时用 selectedClonedVoice，否则用 selectedVoice
+      const voiceLibraryId =
+        props.voiceMode === "clone" ? props.selectedClonedVoice || "" : props.selectedVoice || ""
+
+      // 创建生成任务（服务器渲染）
+      const taskResp = await createGenerationTask({
         template_id: selectedTemplate,
         asset_ids: assetIds,
         output_width: outputWidth,
         output_height: outputHeight,
-        cover_url: props.coverSettings?.upload_url || "",
+        cover_url: coverUrl,
         custom_title: props.titleSettings?.title || "",
         duration: props.duration || undefined,
         video_ratio: props.videoRatio,
+        // 配音：优先用 voice_library_id（配音素材库 asset），兜底 voice_ids
+        ...(voiceLibraryId ? { voice_library_id: voiceLibraryId } : {}),
+        ...(props.selectedVoice && !voiceLibraryId ? { voice_ids: [props.selectedVoice] } : {}),
+        // BGM 配置：受 bgm 开关控制，enabled=false 时也显式传覆盖模板 BGM
+        bgm_config: {
+          enabled: props.bgm !== false,
+          ...(props.bgmConfig?.music_id ? { preset_id: props.bgmConfig.music_id } : {}),
+        },
+        ...(props.sourceEditPlanId ? { source_edit_plan_id: props.sourceEditPlanId } : {}),
         ...(props.titleSettings?.title
           ? {
               title_config: {
@@ -115,8 +109,12 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
             }
           : {}),
       })
+      const taskId = taskResp.items?.[0]?.id
 
-      startPolling()
+      if (!taskId) {
+        throw new Error("创建任务成功但未返回任务 ID，请稍后在任务列表查看")
+      }
+      startPolling(taskId)
     } catch (err: unknown) {
       console.error("[handleGenerate] 生成失败:", err)
       setGenerating(false)

apps/web/src/pages/generate/hooks/usePersistedState.ts

@@ -0,0 +1,63 @@
+import { useState, useEffect, useCallback, useRef } from "react"
+
+/**
+ * 持久化到 localStorage 的 state hook
+ *
+ * 用于在页面刷新后恢复 previewTaskId / sourceEditPlanId 等关键状态。
+ * 当 localStorage 不可用（SSR、隐私模式等）时自动降级为普通 useState。
+ * 当 key 变化时（例如切换模板），自动从新 key 重新读取并更新 state。
+ */
+export function usePersistedState<T>(
+  key: string | null | undefined,
+  defaultValue: T,
+): [T, (value: T | ((prev: T) => T)) => void] {
+  const storageKey = key ? `xiaoxia_${key}` : null
+  // defaultValue 用 ref 持有，避免作为 useEffect 依赖导致频繁重跑
+  const defaultValueRef = useRef(defaultValue)
+  defaultValueRef.current = defaultValue
+
+  const readFromStorage = useCallback((k: string | null): T => {
+    if (!k) return defaultValueRef.current
+    try {
+      const stored = localStorage.getItem(k)
+      if (stored !== null) {
+        return JSON.parse(stored) as T
+      }
+    } catch (e) {
+      // localStorage 不可用或 JSON 解析失败，使用默认值
+      console.warn("[usePersistedState] 读取 localStorage 失败:", e)
+    }
+    return defaultValueRef.current
+  }, [])
+
+  const [state, setState] = useState<T>(() => readFromStorage(storageKey))
+
+  // key 变化时（如切换模板/草稿），从新 key 重新读取，避免状态与存储不同步
+  useEffect(() => {
+    setState(readFromStorage(storageKey))
+  }, [storageKey, readFromStorage])
+
+  const setPersistedState = useCallback(
+    (value: T | ((prev: T) => T)) => {
+      setState((prev) => {
+        const nextValue = typeof value === "function" ? (value as (prev: T) => T)(prev) : value
+        if (storageKey) {
+          try {
+            if (nextValue === null || nextValue === undefined || nextValue === "") {
+              localStorage.removeItem(storageKey)
+            } else {
+              localStorage.setItem(storageKey, JSON.stringify(nextValue))
+            }
+          } catch (e) {
+            // localStorage 写入失败（存储空间满/隐私模式），静默忽略
+            console.warn("[usePersistedState] 写入 localStorage 失败:", e)
+          }
+        }
+        return nextValue
+      })
+    },
+    [storageKey],
+  )
+
+  return [state, setPersistedState]
+}

apps/web/src/pages/generate/hooks/useSegmentScheduler.ts

@@ -1,55 +1,37 @@
 /**
- * 素材片段调度器 Hook（多 video 元素方案 v2）
+ * 素材片段调度器 Hook（多 video 元素方案 v3）
- * 每个片段对应一个独立 <video> 元素，全部预加载，通过 display 切换实现无缝播放
+ *
- * 替代单 video + 切 src 方案，消除片段切换延迟
+ * v3 修复：
+ * - 所有动态状态存入 ref，tick 为稳定函数，彻底消除 RAF 闭包陷阱
+ * - 片段切换时先启动下一个 video 再切可见性，消除冻屏间隔
+ * - 进度更新 200ms 节流
  */
+
 import { useState, useRef, useCallback, useEffect, useMemo } from "react"
 
-/** 单个播放片段 */
 export interface PlaybackSegment {
-  /** 素材 ID */
   assetId: string
-  /** 素材视频 URL */
   videoUrl: string
-  /** 片段在素材中的入点（秒） */
   startTime: number
-  /** 片段在素材中的出点（秒） */
   endTime: number
-  /** 片段在时间线中的顺序 */
   order: number
 }
 
-/** 调度器返回 */
 export interface SegmentSchedulerState {
-  /** 是否正在播放 */
   isPlaying: boolean
-  /** 当前播放的全局时间（秒） */
   currentTime: number
-  /** 总时长（秒） */
   totalDuration: number
-  /** 当前片段索引 */
   currentSegmentIndex: number
-  /** 当前片段的本地播放时间 */
   segmentLocalTime: number
-  /** 是否已播完 */
   isEnded: boolean
-  /** 是否可以播放（至少有 1 个片段） */
   canPlay: boolean
-  /** 播放 */
   play: () => void
-  /** 暂停 */
   pause: () => void
-  /** 切换播放/暂停 */
   togglePlayPause: () => void
-  /** 跳转到全局时间 */
   seekTo: (time: number) => void
-  /** 每个片段对应的 video 元素 ref 数组 */
   videoRefs: React.MutableRefObject<(HTMLVideoElement | null)[]>
 }
 
-/**
- * 根据全局时间定位对应的片段和本地时间
- */
 function findSegmentAtTime(
   segments: PlaybackSegment[],
   globalTime: number,
@@ -66,9 +48,6 @@ function findSegmentAtTime(
   return { index: segments.length - 1, localTime: segments[segments.length - 1].endTime }
 }
 
-/**
- * 计算每个片段的全局起始时间
- */
 function buildTimeline(segments: PlaybackSegment[]): number[] {
   const starts: number[] = []
   let acc = 0
@@ -79,224 +58,242 @@ function buildTimeline(segments: PlaybackSegment[]): number[] {
   return starts
 }
 
-/**
- * useSegmentScheduler — 多 video 元素版素材片段调度器
- *
- * 核心改变：
- * - 每个片段对应一个独立 <video> 元素（由组件渲染，ref 传入）
- * - 所有 video 在挂载时即设置 src + preload="auto"，浏览器自动预加载
- * - 切换片段仅改 currentSegmentIndex + display，无需重新 load
- * - 实现无缝切换，无加载延迟
- */
 export function useSegmentScheduler(segments: PlaybackSegment[]): SegmentSchedulerState {
-  /** 每个片段对应的 video 元素 ref（由组件 JSX 渲染并绑定） */
   const videoRefs = useRef<(HTMLVideoElement | null)[]>([])
   const [isPlaying, setIsPlaying] = useState(false)
   const [currentTime, setCurrentTime] = useState(0)
   const [currentSegmentIndex, setCurrentSegmentIndex] = useState(0)
   const [isEnded, setIsEnded] = useState(false)
-  const rafRef = useRef<number>(0)
+  const rafRef = useRef(0)
   const isSeekingRef = useRef(false)
+  const lastTimeUpdateRef = useRef(0)
 
-  // 计算时间线
+  // 所有动态值存入 ref，tick 始终读取最新值，不依赖闭包
-  const timelineStarts = useMemo(() => buildTimeline(segments), [segments])
+  const segIdxRef = useRef(0)
-  const totalDuration = useMemo(
+  const segmentsRef = useRef(segments)
+  const timelineStartsData = useMemo(() => buildTimeline(segments), [segments])
+  const totalDurationData = useMemo(
     () => segments.reduce((sum, seg) => sum + (seg.endTime - seg.startTime), 0),
     [segments],
   )
+  const timelineStartsRef = useRef(timelineStartsData)
+  const totalDurationRef = useRef(totalDurationData)
+  const isPlayingRef = useRef(false)
+
+  segmentsRef.current = segments
+  timelineStartsRef.current = timelineStartsData
+  totalDurationRef.current = totalDurationData
 
   const canPlay = segments.length > 0
 
-  // 当前片段信息
+  useEffect(() => {
-  const currentSegment = segments[currentSegmentIndex] || null
+    segIdxRef.current = currentSegmentIndex
-  const segmentLocalTime = currentSegment
+  }, [currentSegmentIndex])
-    ? currentTime - (timelineStarts[currentSegmentIndex] || 0) + currentSegment.startTime
+
-    : 0
+  useEffect(() => {
+    isPlayingRef.current = isPlaying
+  }, [isPlaying])
+
+  const waitForReady = useCallback((video: HTMLVideoElement, timeout = 3000): Promise<void> => {
+    if (video.readyState >= 3) return Promise.resolve()
+    return new Promise((resolve) => {
+      const onCanPlay = () => {
+        video.removeEventListener("canplay", onCanPlay)
+        clearTimeout(timer)
+        resolve()
+      }
+      const timer = setTimeout(() => {
+        video.removeEventListener("canplay", onCanPlay)
+        resolve()
+      }, timeout)
+      video.addEventListener("canplay", onCanPlay)
+    })
+  }, [])
 
-  /**
-   * 切换到指定片段
-   * 不改变 src（video 已在 JSX 中设置），仅 seek + 等待可播
-   */
   const switchToSegment = useCallback(
-    (index: number, seekToLocalTime?: number): Promise<void> => {
+    async (index: number, seekToLocalTime?: number) => {
-      return new Promise((resolve) => {
+      const segs = segmentsRef.current
-        // 暂停当前视频
+      const video = videoRefs.current[index]
-        const prevVideo = videoRefs.current[currentSegmentIndex]
+      if (!video || index >= segs.length) return
-        if (prevVideo) prevVideo.pause()
 
-        const video = videoRefs.current[index]
+      const seg = segs[index]
-        if (!video || index >= segments.length) {
+      const localTime = seekToLocalTime ?? seg.startTime
-          resolve()
+      const oldIdx = segIdxRef.current
-          return
+      const oldVideo = videoRefs.current[oldIdx]
-        }
 
-        const seg = segments[index]
+      if (oldVideo && oldVideo !== video) oldVideo.pause()
-        const localTime = seekToLocalTime ?? seg.startTime
 
-        // 设置播放位置
+      if (!video.src && seg.videoUrl) {
+        video.src = seg.videoUrl
+        video.load()
+      }
+
+      if (Math.abs(video.currentTime - localTime) > 0.05) {
         video.currentTime = localTime
+      }
 
-        // 如果已有足够帧数据，直接 resolve
+      segIdxRef.current = index
-        if (video.readyState >= 2) {
+      setCurrentSegmentIndex(index)
-          setCurrentSegmentIndex(index)
-          resolve()
-          return
-        }
 
-        // 等待 canplay 事件
+      await waitForReady(video)
-        const onCanPlay = () => {
-          video.removeEventListener("canplay", onCanPlay)
-          clearTimeout(timeoutId)
-          setCurrentSegmentIndex(index)
-          resolve()
-        }
-
-        // 10 秒超时保护
-        const timeoutId = setTimeout(() => {
-          video.removeEventListener("canplay", onCanPlay)
-          console.warn(
-            `[useSegmentScheduler] 片段 ${index} 预加载超时 (10s), readyState=${video.readyState}`,
-          )
-          setCurrentSegmentIndex(index)
-          resolve()
-        }, 10000)
-
-        video.addEventListener("canplay", onCanPlay)
-      })
     },
-    [segments, currentSegmentIndex],
+    [waitForReady],
   )
 
-  /** 播放循环 — 检测片段边界并切换 */
+  // 稳定的 tick 函数，空依赖，所有值从 ref 读取
   const tick = useCallback(() => {
-    const video = videoRefs.current[currentSegmentIndex]
+    const segs = segmentsRef.current
+    const idx = segIdxRef.current
+    const video = videoRefs.current[idx]
+
     if (!video || isSeekingRef.current) {
       rafRef.current = requestAnimationFrame(tick)
       return
     }
 
-    const seg = segments[currentSegmentIndex]
+    const seg = segs[idx]
     if (!seg) return
 
-    // 检查是否到达出点（容差 0.15s）
+    // 预加载下一个片段
-    if (video.currentTime >= seg.endTime - 0.15) {
+    const nextIndex = idx + 1
-      video.pause()
+    if (nextIndex < segs.length) {
-      const nextIndex = currentSegmentIndex + 1
+      const nextVideo = videoRefs.current[nextIndex]
-      if (nextIndex < segments.length) {
+      if (nextVideo) {
-        switchToSegment(nextIndex).then(() => {
+        const timeToEnd = seg.endTime - video.currentTime
-          setIsPlaying(true)
+        if (timeToEnd <= 2 && nextVideo.readyState < 3) {
-          rafRef.current = requestAnimationFrame(tick)
+          const nextSeg = segs[nextIndex]
-          const nextVideo = videoRefs.current[nextIndex]
+          if (Math.abs(nextVideo.currentTime - nextSeg.startTime) > 0.5) {
-          if (nextVideo) {
+            nextVideo.currentTime = nextSeg.startTime
-            const canPlay = () => {
-              nextVideo
-                .play()
-                .catch((e) =>
-                  console.warn("[useSegmentScheduler] auto-play next segment failed:", e),
-                )
-            }
-            if (nextVideo.readyState >= 3) {
-              canPlay()
-            } else {
-              const timeout = setTimeout(canPlay, 300)
-              nextVideo.addEventListener(
-                "canplay",
-                () => {
-                  clearTimeout(timeout)
-                  canPlay()
-                },
-                { once: true },
-              )
-            }
           }
-        })
+        }
+      }
+    }
+
+    // 检测片段边界
+    if (video.currentTime >= seg.endTime - 0.1) {
+      if (nextIndex < segs.length) {
+        const nextVideo = videoRefs.current[nextIndex]
+        const nextSeg = segs[nextIndex]
         const accumulatedTime =
-          (timelineStarts[currentSegmentIndex] || 0) + (seg.endTime - seg.startTime)
+          (timelineStartsRef.current[idx] || 0) + (seg.endTime - seg.startTime)
+
+        if (nextVideo) {
+          if (Math.abs(nextVideo.currentTime - nextSeg.startTime) > 0.1) {
+            nextVideo.currentTime = nextSeg.startTime
+          }
+          // 先启动下一个视频（muted，可安全同时播放）
+          nextVideo
+            .play()
+            .catch((e) => console.warn("[useSegmentScheduler] next segment play failed:", e))
+        }
+
+        // 立即切换可见性
+        segIdxRef.current = nextIndex
+        setCurrentSegmentIndex(nextIndex)
         setCurrentTime(accumulatedTime)
+        lastTimeUpdateRef.current = 0
+        setIsPlaying(true)
+
+        // 下一帧暂停旧视频（让新视频先渲染，避免冻屏）
+        const oldVideo = video
+        requestAnimationFrame(() => {
+          oldVideo.pause()
+        })
+
+        rafRef.current = requestAnimationFrame(tick)
+        return
       } else {
+        video.pause()
         setIsPlaying(false)
         setIsEnded(true)
-        setCurrentTime(totalDuration)
+        setCurrentTime(totalDurationRef.current)
         return
       }
-    } else {
+    }
-      const globalTime =
+
-        (timelineStarts[currentSegmentIndex] || 0) + (video.currentTime - seg.startTime)
+    const globalTime = (timelineStartsRef.current[idx] || 0) + (video.currentTime - seg.startTime)
-      setCurrentTime(Math.max(0, Math.min(globalTime, totalDuration)))
+    const now = performance.now()
+    if (now - lastTimeUpdateRef.current >= 200) {
+      lastTimeUpdateRef.current = now
+      setCurrentTime(Math.max(0, Math.min(globalTime, totalDurationRef.current)))
     }
 
     rafRef.current = requestAnimationFrame(tick)
-  }, [segments, currentSegmentIndex, timelineStarts, totalDuration, switchToSegment])
+  }, [])
 
-  /** 播放 */
   const play = useCallback(async () => {
     if (!canPlay) return
-
     setIsEnded(false)
-
+    const idx = segIdxRef.current
-    // 确保第一段可播放
+    const video = videoRefs.current[idx]
-    const firstVideo = videoRefs.current[0]
-    if (firstVideo && currentSegmentIndex === 0 && firstVideo.readyState < 2) {
-      await switchToSegment(0)
-    }
-
-    const video = videoRefs.current[currentSegmentIndex]
     if (!video) return
 
-    try {
+    if (idx === 0 && video.readyState < 2) {
-      const playPromise = video.play()
+      if (!video.src && segmentsRef.current[0]?.videoUrl) {
-      if (playPromise !== undefined) {
+        video.src = segmentsRef.current[0].videoUrl
-        await playPromise
+        video.load()
       }
+      await waitForReady(video)
+    }
+
+    try {
+      await video.play()
       setIsPlaying(true)
+      cancelAnimationFrame(rafRef.current)
       rafRef.current = requestAnimationFrame(tick)
     } catch (err) {
       console.warn("[useSegmentScheduler] 播放失败:", err)
     }
-  }, [canPlay, switchToSegment, tick, currentSegmentIndex])
+  }, [canPlay, waitForReady, tick])
 
-  /** 暂停 */
   const pause = useCallback(() => {
-    const video = videoRefs.current[currentSegmentIndex]
+    const video = videoRefs.current[segIdxRef.current]
     if (video) video.pause()
     setIsPlaying(false)
     cancelAnimationFrame(rafRef.current)
-  }, [currentSegmentIndex])
+  }, [])
 
-  /** 切换播放/暂停 */
   const togglePlayPause = useCallback(() => {
-    if (isPlaying) {
+    if (isPlayingRef.current) {
       pause()
     } else {
       if (isEnded) {
-        // 播放结束后再次播放，从头开始
         setIsEnded(false)
-        switchToSegment(0, segments[0]?.startTime).then(() => {
+        lastTimeUpdateRef.current = 0
-          const video = videoRefs.current[0]
+        const firstVideo = videoRefs.current[0]
-          if (video) {
+        if (firstVideo) {
-            video.play().catch((e) => console.warn("[useSegmentScheduler] restart play failed:", e))
+          videoRefs.current.forEach((v, i) => {
-            setIsPlaying(true)
+            if (v && i !== 0) v.pause()
-            setCurrentTime(0)
+          })
-            rafRef.current = requestAnimationFrame(tick)
+          firstVideo.currentTime = segmentsRef.current[0]?.startTime || 0
-          }
+          segIdxRef.current = 0
-        })
+          setCurrentSegmentIndex(0)
+          setCurrentTime(0)
+          firstVideo
+            .play()
+            .then(() => {
+              setIsPlaying(true)
+              cancelAnimationFrame(rafRef.current)
+              rafRef.current = requestAnimationFrame(tick)
+            })
+            .catch((e) => console.warn("[useSegmentScheduler] restart failed:", e))
+        }
       } else {
         play()
       }
     }
-  }, [isPlaying, isEnded, pause, play, switchToSegment, segments, tick])
+  }, [isEnded, pause, play, tick])
 
-  /** 跳转到指定全局时间 */
   const seekTo = useCallback(
     async (time: number) => {
       if (!canPlay) return
-
+      const clampedTime = Math.max(0, Math.min(time, totalDurationRef.current))
-      const clampedTime = Math.max(0, Math.min(time, totalDuration))
+      const { index, localTime } = findSegmentAtTime(segmentsRef.current, clampedTime)
-      const { index, localTime } = findSegmentAtTime(segments, clampedTime)
 
       isSeekingRef.current = true
+      cancelAnimationFrame(rafRef.current)
 
-      if (index !== currentSegmentIndex) {
+      if (index !== segIdxRef.current) {
         await switchToSegment(index, localTime)
       } else {
         const video = videoRefs.current[index]
@@ -305,48 +302,54 @@ export function useSegmentScheduler(segments: PlaybackSegment[]): SegmentSchedul
 
       setCurrentTime(clampedTime)
       setIsEnded(false)
+      lastTimeUpdateRef.current = 0
+
+      if (isPlayingRef.current) {
+        const video = videoRefs.current[index]
+        if (video) {
+          video.play().catch(() => {})
+        }
+        rafRef.current = requestAnimationFrame(tick)
+      }
 
       setTimeout(() => {
         isSeekingRef.current = false
       }, 200)
     },
-    [canPlay, totalDuration, segments, currentSegmentIndex, switchToSegment],
+    [canPlay, switchToSegment, tick],
   )
 
-  // 确保 videoRefs 数组长度与 segments 一致 + 强制预加载
   useEffect(() => {
     videoRefs.current = videoRefs.current.slice(0, segments.length)
     while (videoRefs.current.length < segments.length) {
       videoRefs.current.push(null)
     }
-    // 强制预加载：所有 video 元素挂载后，调用 load() 确保浏览器真正开始加载数据
-    videoRefs.current.forEach((video) => {
-      if (video) {
-        video.load()
-      }
-    })
   }, [segments])
 
-  // 组件卸载时清理
   useEffect(() => {
     return () => {
       cancelAnimationFrame(rafRef.current)
     }
   }, [])
 
-  // 片段列表变化时重置
   useEffect(() => {
     cancelAnimationFrame(rafRef.current)
+    segIdxRef.current = 0
     setIsPlaying(false)
     setCurrentTime(0)
     setCurrentSegmentIndex(0)
     setIsEnded(false)
   }, [segments])
 
+  const currentSegment = segments[currentSegmentIndex] || null
+  const segmentLocalTime = currentSegment
+    ? currentTime - (timelineStartsRef.current[currentSegmentIndex] || 0) + currentSegment.startTime
+    : 0
+
   return {
     isPlaying,
     currentTime,
-    totalDuration,
+    totalDuration: totalDurationData,
     currentSegmentIndex,
     segmentLocalTime,
     isEnded,

apps/web/src/pages/generate/hooks/useServerPreview.ts

@@ -0,0 +1,294 @@
+/**
+ * 服务器渲染预览 Hook
+ *
+ * 核心职责：
+ * 1. 调用 POST /generation/preview 创建服务器预览渲染任务
+ * 2. 轮询 GET /generation/preview/{task_id} 直到完成
+ * 3. 返回服务器渲染的真实视频 URL（供 <video> 标签播放）
+ * 4. 检测配置变更，标记预览失效（stale）或自动重新渲染
+ * 5. 网络错误自动重试 2 次
+ *
+ * 状态机：
+ *   idle → loading → ready → stale (config changed)
+ *                   ↘ failed → idle (retry)
+ */
+import { useState, useCallback, useRef, useEffect } from "react"
+import { createPreview, getPreviewStatus } from "@/api/generation/preview"
+import type { CreatePreviewRequest } from "@/api/generation/types"
+
+export type ServerPreviewStatus = "idle" | "loading" | "ready" | "stale" | "failed"
+
+interface UseServerPreviewOptions {
+  /** 是否启用预览（Step4+ 且有素材和模板时） */
+  enabled: boolean
+  /** 构建预览请求参数（每次 render 调用，获取最新配置） */
+  buildRequest: () => CreatePreviewRequest
+  /** 预览任务创建成功回调 */
+  onPreviewTaskCreated?: (taskId: string, sourceEditPlanId?: string) => void
+}
+
+interface UseServerPreviewReturn {
+  status: ServerPreviewStatus
+  videoUrl: string | null
+  error: string | null
+  /** 进度 0-100 */
+  progress: number
+  /** 手动触发预览创建（"重新预览"按钮或标题变更后手动刷新） */
+  triggerPreview: () => void
+  /** 当前预览任务 ID */
+  taskId: string | null
+}
+
+const POLL_INTERVAL = 2000
+const POLL_TIMEOUT = 120_000
+const MAX_NETWORK_RETRIES = 2
+
+/**
+ * 对配置参数做指纹，用于检测配置是否变化
+ */
+function buildFingerprint(req: CreatePreviewRequest): string {
+  return JSON.stringify({
+    t: req.template_id,
+    a: [...req.asset_ids].sort(),
+    d: req.duration,
+    r: req.video_ratio,
+    v: req.voice_library_id,
+    b: req.bgm_config,
+    title: req.title_config,
+  })
+}
+
+export function useServerPreview({
+  enabled,
+  buildRequest,
+  onPreviewTaskCreated,
+}: UseServerPreviewOptions): UseServerPreviewReturn {
+  const [status, setStatus] = useState<ServerPreviewStatus>("idle")
+  const [videoUrl, setVideoUrl] = useState<string | null>(null)
+  const [error, setError] = useState<string | null>(null)
+  const [progress, setProgress] = useState(0)
+  const [taskId, setTaskId] = useState<string | null>(null)
+
+  const pollTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
+  const timeoutTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
+  const requestSeqRef = useRef(0)
+  const renderedFingerprintRef = useRef<string>("")
+  const mountedRef = useRef(true)
+  const networkRetriesRef = useRef(0)
+
+  // 始终持有最新的 buildRequest 和回调
+  const buildRequestRef = useRef(buildRequest)
+  buildRequestRef.current = buildRequest
+  const onCreatedRef = useRef(onPreviewTaskCreated)
+  onCreatedRef.current = onPreviewTaskCreated
+
+  /* ── 清理 ── */
+  const clearTimers = useCallback(() => {
+    if (pollTimerRef.current) {
+      clearTimeout(pollTimerRef.current)
+      pollTimerRef.current = null
+    }
+    if (timeoutTimerRef.current) {
+      clearTimeout(timeoutTimerRef.current)
+      timeoutTimerRef.current = null
+    }
+  }, [])
+
+  useEffect(() => {
+    mountedRef.current = true
+    return () => {
+      mountedRef.current = false
+      clearTimers()
+    }
+  }, [clearTimers])
+
+  /* ── 创建预览 + 轮询 ── */
+  const createAndPoll = useCallback(
+    async (request: CreatePreviewRequest, seq: number) => {
+      setStatus("loading")
+      setProgress(0)
+      setError(null)
+      networkRetriesRef.current = 0
+
+      try {
+        const resp = await createPreview(request)
+        if (seq !== requestSeqRef.current || !mountedRef.current) return
+
+        setTaskId(resp.task_id)
+        onCreatedRef.current?.(resp.task_id, resp.source_edit_plan_id)
+
+        let completed = false
+
+        // 超时保护
+        timeoutTimerRef.current = setTimeout(() => {
+          if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
+          completed = true
+          clearTimers()
+          setStatus("failed")
+          setError("预览渲染超时（120秒），请重试")
+        }, POLL_TIMEOUT)
+
+        const poll = async () => {
+          if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
+
+          try {
+            const st = await getPreviewStatus(resp.task_id)
+            if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
+
+            if (st.status === "completed" && st.video_url) {
+              completed = true
+              clearTimers()
+              renderedFingerprintRef.current = buildFingerprint(request)
+              setVideoUrl(st.video_url)
+              setProgress(100)
+              setStatus("ready")
+              setError(null)
+              return
+            }
+
+            if (st.status === "failed" || st.status === "cancelled") {
+              completed = true
+              clearTimers()
+              setStatus("failed")
+              setError(
+                st.status === "cancelled"
+                  ? "预览任务已取消"
+                  : st.error_message || "预览渲染失败，请重试",
+              )
+              return
+            }
+
+            // pending / generating
+            if (typeof st.progress === "number") setProgress(st.progress)
+            pollTimerRef.current = setTimeout(poll, POLL_INTERVAL)
+          } catch (pollErr) {
+            if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
+            if (networkRetriesRef.current < MAX_NETWORK_RETRIES) {
+              networkRetriesRef.current += 1
+              console.warn(
+                `[ServerPreview] 轮询网络错误，第 ${networkRetriesRef.current} 次重试`,
+                pollErr,
+              )
+              pollTimerRef.current = setTimeout(poll, POLL_INTERVAL * 2)
+            } else {
+              completed = true
+              clearTimers()
+              setStatus("failed")
+              setError("网络错误，无法获取预览状态，请重试")
+            }
+          }
+        }
+
+        poll()
+      } catch (createErr) {
+        if (seq !== requestSeqRef.current || !mountedRef.current) return
+        console.error("[ServerPreview] 创建预览任务失败:", createErr)
+
+        const isNetworkError =
+          !!(createErr as { request?: unknown })?.request ||
+          (createErr as { code?: string })?.code === "ERR_NETWORK"
+
+        if (isNetworkError && networkRetriesRef.current < MAX_NETWORK_RETRIES) {
+          networkRetriesRef.current += 1
+          console.warn(`[ServerPreview] 创建任务网络错误，第 ${networkRetriesRef.current} 次重试`)
+          setTimeout(() => {
+            if (seq === requestSeqRef.current && mountedRef.current) {
+              createAndPoll(request, seq)
+            }
+          }, POLL_INTERVAL * 2)
+          return
+        }
+
+        const errData = (
+          createErr as { response?: { data?: { detail?: string; message?: string } } }
+        )?.response?.data
+        setStatus("failed")
+        setError(errData?.detail || errData?.message || "预览任务创建失败，请重试")
+      }
+    },
+    [clearTimers],
+  )
+
+  /* ── 手动触发预览 ── */
+  const triggerPreview = useCallback(() => {
+    if (!enabled) return
+    const request = buildRequestRef.current()
+    if (!request.template_id || request.asset_ids.length === 0) return
+
+    clearTimers()
+    const seq = ++requestSeqRef.current
+    setVideoUrl(null)
+    setTaskId(null)
+    createAndPoll(request, seq)
+  }, [enabled, clearTimers, createAndPoll])
+
+  /* ── 自动触发 + 配置变更检测 ── */
+  // 每次 render 都检查最新配置 fingerprint，与已渲染的 fingerprint 比较
+  const request = enabled ? buildRequest() : null
+  const currentFingerprint = request
+    ? request.template_id && request.asset_ids.length > 0
+      ? buildFingerprint(request)
+      : ""
+    : ""
+
+  // 首次进入自动触发
+  const didInitRef = useRef(false)
+  useEffect(() => {
+    if (!enabled || !currentFingerprint) {
+      didInitRef.current = false
+      // 禁用时取消进行中的轮询，避免回到前序步骤后仍在后台轮询
+      requestSeqRef.current += 1
+      clearTimers()
+      return
+    }
+    if (!didInitRef.current) {
+      didInitRef.current = true
+      renderedFingerprintRef.current = currentFingerprint
+      triggerPreview()
+    }
+  }, [enabled, currentFingerprint, triggerPreview, clearTimers])
+
+  // 配置变更检测：素材/配音/BGM 等变化 → 自动重渲染；标题样式变化 → 标记 stale
+  const prevFingerprintRef = useRef(currentFingerprint)
+  useEffect(() => {
+    if (!enabled || !currentFingerprint) return
+    const prev = prevFingerprintRef.current
+    prevFingerprintRef.current = currentFingerprint
+
+    if (!prev || prev === currentFingerprint) return
+    if (currentFingerprint === renderedFingerprintRef.current) return
+
+    // 配置已变更
+    // 判断是标题样式变更还是素材/配音/BGM 变更
+    const prevParsed = JSON.parse(prev) as Record<string, unknown>
+    const currParsed = JSON.parse(currentFingerprint) as Record<string, unknown>
+    const nonTitleChanged =
+      prevParsed.t !== currParsed.t ||
+      prevParsed.a !== currParsed.a ||
+      prevParsed.d !== currParsed.d ||
+      prevParsed.r !== currParsed.r ||
+      prevParsed.v !== currParsed.v ||
+      JSON.stringify(prevParsed.b) !== JSON.stringify(currParsed.b)
+
+    if (nonTitleChanged) {
+      // 素材/配音/BGM/模板等变化 → 自动重新渲染
+      renderedFingerprintRef.current = currentFingerprint
+      triggerPreview()
+    } else {
+      // 仅标题文字/样式变化 → 标记 stale，不自动重渲染（避免频繁请求）
+      // 实时预览由 CSS TitleOverlay 提供
+      setStatus((s) => (s === "ready" ? "stale" : s))
+    }
+  }, [enabled, currentFingerprint, triggerPreview])
+
+  return {
+    status,
+    videoUrl,
+    error,
+    progress,
+    triggerPreview,
+    taskId,
+  }
+}
+
+export default useServerPreview

apps/web/src/pages/generate/hooks/useStep2Materials.ts

@@ -3,9 +3,14 @@
  * 组合素材库加载 + 智能匹配两个子 Hook
  */
 import { useCallback, useEffect, useRef } from "react"
+import type { AssetItem } from "@/api/assets"
+import type { TemplateSegment } from "@/api/templates/types"
+import { updateEditPlanClips } from "@/api/template-editor"
 import { formatDuration } from "../utils/formatDuration"
+import { buildClipsFromAssets } from "../utils/buildClipsFromAssets"
 import { useMaterialLibrary } from "./step2-materials/useMaterialLibrary"
 import { useSmartMatch } from "./step2-materials/useSmartMatch"
+import { useDraftAutoSave } from "./useDraftAutoSave"
 
 interface UseStep2MaterialsProps {
   materialMode: "manual" | "auto"
@@ -14,6 +19,10 @@ interface UseStep2MaterialsProps {
   onSelectedMaterialsChange: (ids: string[]) => void
   smartSelectedIds: string[]
   onSmartSelectedIdsChange: (ids: string[]) => void
+  /** 当前选中的模板/草稿 ID，用于自动保存 */
+  selectedTemplate?: string
+  /** 当前模板的 segments（用于构建 clips duration） */
+  templateSegments?: TemplateSegment[]
 }
 
 export function useStep2Materials({
@@ -23,6 +32,8 @@ export function useStep2Materials({
   onSelectedMaterialsChange,
   smartSelectedIds,
   onSmartSelectedIdsChange,
+  selectedTemplate,
+  templateSegments,
 }: UseStep2MaterialsProps) {
   const { libraries, selectedLibraryId, setSelectedLibraryId, materials, materialsLoading } =
     useMaterialLibrary()
@@ -53,6 +64,69 @@ export function useStep2Materials({
     handleSmartMatch()
   }, [selectedLibraryId, materialMode, materialsLoading, materials.items, handleSmartMatch])
 
+  /* ── Step2 选择素材后自动保存草稿 asset_ids（防抖 500ms，失败静默） ── */
+  const { scheduleSave } = useDraftAutoSave(selectedTemplate)
+  useEffect(() => {
+    if (!selectedTemplate) return
+    const ids = materialMode === "auto" ? smartSelectedIds : selectedMaterials
+    scheduleSave({ asset_ids: ids }, 500)
+  }, [selectedTemplate, materialMode, selectedMaterials, smartSelectedIds, scheduleSave])
+
+  /* ── Step2 选择素材后同步写入 edit_plan_clips（防抖 800ms，失败静默） ── */
+  const clipsTimerRef = useRef<ReturnType<typeof setTimeout>>()
+  const clipsAbortRef = useRef<AbortController | null>(null)
+  const templateSegmentsRef = useRef(templateSegments)
+  templateSegmentsRef.current = templateSegments
+  const selectedTemplateRef = useRef(selectedTemplate)
+  selectedTemplateRef.current = selectedTemplate
+  const materialsRef = useRef(materials)
+  materialsRef.current = materials
+  const smartMatchedRef = useRef<AssetItem[]>(smartMatch.smartMatchedResults)
+  smartMatchedRef.current = smartMatch.smartMatchedResults
+
+  useEffect(() => {
+    const tid = selectedTemplateRef.current
+    if (!tid) return
+    const ids = materialMode === "auto" ? smartSelectedIds : selectedMaterials
+    if (!ids.length) return
+
+    if (clipsTimerRef.current) clearTimeout(clipsTimerRef.current)
+    clipsTimerRef.current = setTimeout(async () => {
+      // 取消上一次未完成的请求
+      if (clipsAbortRef.current) clipsAbortRef.current.abort()
+      const controller = new AbortController()
+      clipsAbortRef.current = controller
+
+      const clips = buildClipsFromAssets({
+        selectedIds: ids,
+        materials: materialsRef.current.items,
+        smartMatchedAssets: smartMatchedRef.current,
+        templateSegments: templateSegmentsRef.current || [],
+      })
+
+      try {
+        await updateEditPlanClips(tid, clips, controller.signal)
+      } catch (err) {
+        const name = (err as { name?: string })?.name
+        if (name !== "CanceledError" && name !== "AbortError") {
+          console.warn("[useStep2Materials] 写入 clips 失败:", err)
+        }
+      }
+    }, 800)
+
+    return () => {
+      if (clipsTimerRef.current) clearTimeout(clipsTimerRef.current)
+    }
+  }, [selectedTemplate, materialMode, selectedMaterials, smartSelectedIds, templateSegments])
+
+  // 组件卸载时取消未完成请求
+  useEffect(() => {
+    return () => {
+      if (clipsTimerRef.current) clearTimeout(clipsTimerRef.current)
+      if (clipsAbortRef.current) clipsAbortRef.current.abort()
+    }
+  }, [])
+
   /* ── 手动选择素材 ── */
   const handleToggleMaterial = useCallback(
     (materialId: string) => {

apps/web/src/pages/generate/hooks/useStep4Title/index.ts

@@ -4,17 +4,24 @@ import { getTitles } from "@/api/titles"
 import type { TitleSettings } from "../../types"
 import { useAiTitleGenerator } from "./useAiTitleGenerator"
 import { useTitleStyleUpdaters } from "./useTitleStyleUpdaters"
+import { useDraftAutoSave } from "../useDraftAutoSave"
 
 interface UseStep4TitleProps {
   titleSettings: TitleSettings
   onTitleSettingsChange: (settings: TitleSettings) => void
+  /** 当前选中的模板/草稿 ID，用于自动保存 */
+  selectedTemplate?: string
 }
 
 /**
  * Step 4 标题设置 Hook
  * 封装 AI 标题生成、标题样式设置等逻辑
  */
-export function useStep4Title({ titleSettings, onTitleSettingsChange }: UseStep4TitleProps) {
+export function useStep4Title({
+  titleSettings,
+  onTitleSettingsChange,
+  selectedTemplate,
+}: UseStep4TitleProps) {
   // 标题库数据
   const { data: userTitles = [] } = useQuery({
     queryKey: ["titles"],
@@ -42,6 +49,38 @@ export function useStep4Title({ titleSettings, onTitleSettingsChange }: UseStep4
   const prevAiAutoSelect = useRef(titleSettings.aiAutoSelect)
   const isFirstMount = useRef(true)
 
+  /* ── Step4 标题内容/样式变化后自动保存草稿（防抖 800ms，失败静默） ── */
+  const { scheduleSave: scheduleTitleSave } = useDraftAutoSave(selectedTemplate)
+  useEffect(() => {
+    if (!selectedTemplate) return
+    scheduleTitleSave(
+      {
+        title: {
+          text: titleSettings.title,
+          font: titleSettings.font,
+          font_size: titleSettings.size,
+          color: titleSettings.color,
+          position: titleSettings.position,
+          bold: titleSettings.bold,
+          stroke: titleSettings.stroke,
+          shadow: titleSettings.shadow,
+        },
+      },
+      800,
+    )
+  }, [
+    selectedTemplate,
+    titleSettings.title,
+    titleSettings.font,
+    titleSettings.size,
+    titleSettings.color,
+    titleSettings.position,
+    titleSettings.bold,
+    titleSettings.stroke,
+    titleSettings.shadow,
+    scheduleTitleSave,
+  ])
+
   // 当 AI 自动选择开关打开时，自动生成/选择一个标题填入
   // 首次挂载时如果开关已经是 true 且无标题，也需要触发
   useEffect(() => {

apps/web/src/pages/generate/hooks/useStep6Cover.ts

@@ -2,11 +2,13 @@
  * Step 6 封面设置 Hook
  * 封装封面设置的交互逻辑，对接后端封面模板 CRUD API
  */
-import { useCallback, useEffect, useState } from "react"
+import { useCallback, useEffect, useRef, useState } from "react"
 import { message } from "antd"
 import type { CoverConfig, CoverTemplate } from "../types/cover"
 import { generateCover } from "@/api/generation"
 import { createPreview, getPreviewStatus } from "@/api/generation/preview"
+import { updateEditPlan } from "@/api/template-editor"
+import type { TitleSettings } from "../types"
 import {
   fetchCoverTemplates,
   createCoverTemplate,
@@ -22,6 +24,22 @@ interface UseStep6CoverProps {
   assetIds?: string[]
   /** 当前选中的模板 ID */
   selectedTemplate?: string
+  /** Step4 标题设置，用于预览视频烧录标题 & 封面叠加标题 */
+  titleSettings?: TitleSettings
+  /** 预览任务创建回调——将 task_id 暴露给父组件供 confirmGeneration 复用 */
+  onPreviewTaskCreated?: (taskId: string) => void
+  /** 从预览响应中提取到 source_edit_plan_id 时的回调 */
+  onSourceEditPlanIdExtracted?: (planId: string) => void
+  /** 配音模式 */
+  voiceMode?: "preset" | "custom" | "clone"
+  /** 选中的配音素材 ID（配音素材库 asset ID） */
+  selectedVoice?: string
+  /** 选中的克隆音色 ID */
+  selectedClonedVoice?: string
+  /** BGM 开关 */
+  bgm?: boolean
+  /** BGM 配置（来自模板） */
+  bgmConfig?: { enabled: boolean; music_id?: string }
 }
 
 export function useStep6Cover({
@@ -30,8 +48,18 @@ export function useStep6Cover({
   duration,
   assetIds = [],
   selectedTemplate = "",
+  titleSettings,
+  onPreviewTaskCreated,
+  onSourceEditPlanIdExtracted,
+  voiceMode,
+  selectedVoice,
+  selectedClonedVoice,
+  bgm,
+  bgmConfig,
 }: UseStep6CoverProps) {
   const [generating, setGenerating] = useState(false)
+  // 防竞态：记录当前预览生成的参数指纹，任务完成时校验一致性
+  const previewParamsRef = useRef<string>("")
 
   // ── 封面设置弹窗状态 ──
   const [showCoverSettings, setShowCoverSettings] = useState(false)
@@ -92,6 +120,20 @@ export function useStep6Cover({
       const response = await generateCover(selectedTemplate, {
         asset_ids: assetIds,
         cover_type: "ai_frame",
+        ...(titleSettings?.title
+          ? {
+              title_config: {
+                text: titleSettings.title,
+                font: titleSettings.font,
+                font_size: titleSettings.size,
+                font_color: titleSettings.color,
+                position: titleSettings.position,
+                bold: titleSettings.bold,
+                stroke: titleSettings.stroke,
+                shadow: titleSettings.shadow,
+              },
+            }
+          : {}),
       })
       clearTimeout(timeoutId)
       const thumbnailUrl = response.cover?.image_url || ""
@@ -132,11 +174,46 @@ export function useStep6Cover({
         console.log("[Step6] 检测到预览缺失，尝试自动创建预览渲染任务...")
         message.info("正在准备预览视频，请稍候...")
         try {
+          // 记录当前参数指纹，用于任务完成时校验一致性（防竞态）
+          previewParamsRef.current = JSON.stringify({ selectedTemplate, assetIds, titleSettings })
+          // 解析配音参数：voiceMode=clone 时用 selectedClonedVoice，否则用 selectedVoice
+          const previewVoiceLibraryId =
+            voiceMode === "clone" ? selectedClonedVoice || "" : selectedVoice || ""
           const previewResp = await createPreview({
             template_id: selectedTemplate,
             asset_ids: assetIds,
             duration: duration || 30,
+            // 配音：voice_library_id 是配音素材库 asset ID（用户上传的音频或 AI 配音）
+            ...(previewVoiceLibraryId ? { voice_library_id: previewVoiceLibraryId } : {}),
+            // BGM 配置：受 bgm 开关控制
+            bgm_config: {
+              enabled: bgm !== false,
+              ...(bgmConfig?.music_id ? { preset_id: bgmConfig.music_id } : {}),
+            },
+            ...(titleSettings?.title
+              ? {
+                  title_config: {
+                    text: titleSettings.title,
+                    font: titleSettings.font,
+                    font_size: titleSettings.size,
+                    font_color: titleSettings.color,
+                    position: titleSettings.position,
+                    bold: titleSettings.bold,
+                    stroke: titleSettings.stroke,
+                    shadow: titleSettings.shadow,
+                  },
+                }
+              : {}),
           })
+          // 将预览任务 ID 暴露给父组件，供 Step7 确认生成时复用（confirmGeneration）
+          const currentFingerprint = JSON.stringify({ selectedTemplate, assetIds, titleSettings })
+          if (previewResp.task_id && previewParamsRef.current === currentFingerprint) {
+            onPreviewTaskCreated?.(previewResp.task_id)
+            // 提取后端自动关联的 source_edit_plan_id，供 fallback 路径使用
+            if (previewResp.source_edit_plan_id) {
+              onSourceEditPlanIdExtracted?.(previewResp.source_edit_plan_id)
+            }
+          }
           // 轮询等待预览渲染完成：递归 setTimeout 避免请求重叠 + 120s 超时兜底
           await new Promise<void>((resolve, reject) => {
             let finished = false
@@ -154,6 +231,21 @@ export function useStep6Cover({
               try {
                 const status = await getPreviewStatus(previewResp.task_id)
                 if (status.status === "completed") {
+                  // 保存预览视频地址到 plan.config.rendered_storage_key，
+                  // 供封面 API 的 E1 兜底路径定位渲染后的视频（含标题烧录）。
+                  // video_url 可能是完整 http(s) URL 或 OSS storage_key，两种格式后端都能处理。
+                  if (status.video_url) {
+                    try {
+                      await updateEditPlan(selectedTemplate, {
+                        config: { rendered_storage_key: status.video_url },
+                      })
+                    } catch (saveErr) {
+                      console.warn(
+                        "[Step6] 保存 rendered_storage_key 失败（不阻塞封面重试）:",
+                        saveErr,
+                      )
+                    }
+                  }
                   done(() => resolve())
                 } else if (status.status === "failed") {
                   done(() => reject(new Error(status.error_message || "预览渲染失败")))
@@ -171,6 +263,20 @@ export function useStep6Cover({
           const retryResp = await generateCover(selectedTemplate, {
             asset_ids: assetIds,
             cover_type: "ai_frame",
+            ...(titleSettings?.title
+              ? {
+                  title_config: {
+                    text: titleSettings.title,
+                    font: titleSettings.font,
+                    font_size: titleSettings.size,
+                    font_color: titleSettings.color,
+                    position: titleSettings.position,
+                    bold: titleSettings.bold,
+                    stroke: titleSettings.stroke,
+                    shadow: titleSettings.shadow,
+                  },
+                }
+              : {}),
           })
           const retryUrl = retryResp.cover?.image_url || ""
           if (retryUrl) {
@@ -212,7 +318,22 @@ export function useStep6Cover({
       clearTimeout(timeoutId)
       setGenerating(false)
     }
-  }, [selectedTemplate, assetIds, coverSettings, onCoverSettingsChange, generating, duration])
+  }, [
+    selectedTemplate,
+    assetIds,
+    coverSettings,
+    onCoverSettingsChange,
+    generating,
+    duration,
+    titleSettings,
+    onPreviewTaskCreated,
+    onSourceEditPlanIdExtracted,
+    voiceMode,
+    selectedVoice,
+    selectedClonedVoice,
+    bgm,
+    bgmConfig,
+  ])
 
   // ── 模板操作方法 ──
   const handleSelectTemplate = useCallback((id: string) => {

apps/web/src/pages/generate/hooks/useStepNavigation.ts

@@ -3,7 +3,7 @@
  * 管理步骤切换与各步骤的前置校验
  * 步骤顺序：模板(1) → 素材(2) → 配音(3) → 标题(4) → 预览(5) → 封面(6) → 确认(7)
  *
- * V24: previewReady 改为前端素材加载状态
+ * 前端实时预览架构：Step5 无需等待服务器渲染
  */
 import { message } from "antd"
 import type { TitleSettings } from "../types"
@@ -16,8 +16,6 @@ export interface UseStepNavigationOptions {
   selectedMaterials: string[]
   smartSelectedIds: string[]
   titleSettings: TitleSettings
-  /** 预览是否就绪（前端素材已加载） */
-  previewReady: boolean
 }
 
 export interface UseStepNavigationReturn {
@@ -34,7 +32,6 @@ export const useStepNavigation = (options: UseStepNavigationOptions): UseStepNav
     selectedMaterials,
     smartSelectedIds,
     titleSettings,
-    previewReady,
   } = options
 
   const goNext = () => {
@@ -50,15 +47,10 @@ export const useStepNavigation = (options: UseStepNavigationOptions): UseStepNav
       message.warning("请先进行智能匹配并选择素材")
       return
     }
-    // Step3 配音：配音为可选项，不强制校验，用户可跳过
     if (currentStep === 4 && !titleSettings.title.trim()) {
       message.warning("请选择或输入标题")
       return
     }
-    if (currentStep === 5 && !previewReady) {
-      message.warning("请先选择素材以预览效果")
-      return
-    }
     if (currentStep < 7) {
       setCurrentStep((s) => s + 1)
     }

apps/web/src/pages/generate/utils/buildClipsFromAssets.ts

@@ -0,0 +1,69 @@
+/**
+ * 将选中素材 + 模板 segments 构建为 edit_plan_clips 写入数据。
+ *
+ * 逻辑必须与 FrontendPreviewPlayer.tsx 中 buildPlaybackSegments 完全一致：
+ *   assetDuration = asset.duration || asset.metadata?.duration || 30
+ *   tplSeg = templateSegments[i] || lastSegment
+ *   segDuration = clamp(assetDuration, tplSeg.duration_min, tplSeg.duration_max)
+ *   start_time = 0
+ *   // 关键：预览播放器中 endTime = min(startTime + segDuration, assetDuration)
+ *   // 因此 clips.duration 也必须用 min(segDuration, assetDuration) 截断，
+ *   // 避免素材实际时长比 clamp 后的 segDuration 短时，Worker 尝试读取不存在的片段
+ *   duration = min(segDuration, assetDuration)
+ *
+ * 预览播放器（Canvas 实时预览）直接在内存中构建 segments 播放，不读 edit_plan_clips；
+ * 本函数产出的 clips 写入 DB 后由 Worker 渲染。两边用完全相同的时长计算，
+ * 保证用户在编辑过程中看到的预览与最终生成视频一致。
+ */
+import type { AssetItem } from "@/api/assets"
+import type { TemplateSegment } from "@/api/templates/types"
+import type { EditPlanClipInput } from "@/api/template-editor"
+
+interface BuildClipsOptions {
+  /** 选中的素材 ID 列表（按选择顺序） */
+  selectedIds: string[]
+  /** 已加载的素材列表（用于查 duration） */
+  materials: AssetItem[]
+  /** 智能匹配返回的素材（auto 模式下可能不在 materials 列表中） */
+  smartMatchedAssets?: AssetItem[]
+  /** 模板 segments */
+  templateSegments?: TemplateSegment[]
+}
+
+export function buildClipsFromAssets({
+  selectedIds,
+  materials,
+  smartMatchedAssets = [],
+  templateSegments = [],
+}: BuildClipsOptions): EditPlanClipInput[] {
+  if (!selectedIds.length) return []
+
+  // 合并两个素材来源，建立 id → asset 索引
+  const assetMap = new Map<string, AssetItem>()
+  for (const a of materials) assetMap.set(a.id, a)
+  for (const a of smartMatchedAssets) assetMap.set(a.id, a)
+
+  const lastSeg = templateSegments[templateSegments.length - 1]
+
+  return selectedIds.map((assetId, i) => {
+    const asset = assetMap.get(assetId)
+    const assetDuration = asset?.duration || asset?.metadata?.duration || 30
+
+    const tplSeg = templateSegments[i] || lastSeg
+    const segDuration = tplSeg
+      ? Math.min(tplSeg.duration_max, Math.max(tplSeg.duration_min, assetDuration))
+      : Math.min(assetDuration, 10)
+
+    // 与 FrontendPreviewPlayer.buildPlaybackSegments 中
+    //   endTime = Math.min(startTime + segDuration, assetDuration)
+    // 保持一致：duration 不能超过素材实际时长
+    const duration = Math.min(segDuration, assetDuration)
+
+    return {
+      asset_id: assetId,
+      start_time: 0,
+      duration,
+      order: i,
+    }
+  })
+}

apps/web/src/pages/generate/utils/calculateResolution.ts

@@ -0,0 +1,46 @@
+/**
+ * 根据视频比例计算输出分辨率
+ *
+ * 规则：
+ * - 长边固定 1920
+ * - 短边按 1920 × (短/长) 计算，对齐到偶数
+ * - 9:16 → 1080×1920（竖屏）
+ * - 16:9 → 1920×1080（横屏）
+ * - 1:1   → 1920×1920
+ * - 无法解析时 fallback 到 1080×1920
+ */
+export interface Resolution {
+  width: number
+  height: number
+}
+
+export function calculateResolution(ratio: string): Resolution {
+  if (!ratio) return { width: 1080, height: 1920 }
+
+  if (ratio.includes(":")) {
+    const [rw, rh] = ratio.split(":").map(Number)
+    if (rw > 0 && rh > 0) {
+      const [longSide, shortSide] = rw < rh ? [rh, rw] : [rw, rh]
+      const baseLong = 1920
+      const baseShort = Math.round((baseLong * shortSide) / longSide)
+      const evenShort = baseShort - (baseShort % 2)
+      if (rw < rh) {
+        // 竖屏：短边是宽，长边是高
+        return { width: evenShort, height: baseLong }
+      } else {
+        // 横屏：长边是宽，短边是高
+        return { width: baseLong, height: evenShort }
+      }
+    }
+    return { width: 1080, height: 1920 }
+  }
+
+  if (ratio.includes("x")) {
+    const [wStr, hStr] = ratio.split("x")
+    const w = parseInt(wStr, 10) || 1080
+    const h = parseInt(hStr, 10) || 1920
+    return { width: w, height: h }
+  }
+
+  return { width: 1080, height: 1920 }
+}

apps/web/src/pages/templates/hooks/useTemplateLibrary.ts

@@ -87,7 +87,7 @@ export const useTemplateLibrary = () => {
     [copyMutation],
   )
 
-  /* 操作：使用模板 → 跳转剪辑编辑器 */
+  /* 操作：使用模板 → 跳转剪辑模板 */
   const handleUse = useCallback(
     (template: TemplateItem) => {
       navigate(`/app/editing-planner?templateId=${template.id}`)

apps/web/src/test/api/bgm.test.ts

@@ -32,7 +32,7 @@ describe("bgm API", () => {
 
   describe("getBgmPresets", () => {
     it("should resolve successfully", async () => {
-      await expect(getBgmPresets("test-params?")).resolves.not.toThrow()
+      await expect(getBgmPresets("test-template", { category: "test" })).resolves.not.toThrow()
     })
 
     it("should reject on API error", async () => {
@@ -42,7 +42,7 @@ describe("bgm API", () => {
       mockDelete.mockRejectedValue(new Error("Network error"))
       mockPatch.mockRejectedValue(new Error("Network error"))
 
-      await expect(getBgmPresets("test-params?")).rejects.toThrow()
+      await expect(getBgmPresets("test-template", { category: "test" })).rejects.toThrow()
     })
   })
 })

apps/web/src/test/api/edit-plans.test.ts

@@ -1,16 +1,9 @@
 import { describe, expect, it, vi, beforeEach } from "vitest"
 import {
-  getEditPlans,
   getEditPlan,
-  createEditPlan,
   updateEditPlan,
-  deleteEditPlan,
-  generateEditPlan,
-  getGenerationStatus,
   aiRecommendClips,
-  getEditPlanGenerations,
   getGenerationTaskResults,
-  cancelGeneration,
   getEditPlanClips,
   getEditPlanClip,
   createEditPlanClip,
@@ -19,7 +12,6 @@ import {
   reorderEditPlanClips,
   batchDeleteEditPlanClips,
   createClipsFromAssets,
-  copyEditPlan,
   getMediaAssets,
   getMediaAsset,
 } from "@/api/template-editor"
@@ -53,22 +45,6 @@ describe("editPlans API", () => {
     mockPatch.mockResolvedValue({ data: { success: true, items: [] } })
   })
 
-  describe("getEditPlans", () => {
-    it("should resolve successfully", async () => {
-      await expect(getEditPlans("test-params?")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(getEditPlans("test-params?")).rejects.toThrow()
-    })
-  })
-
   describe("getEditPlan", () => {
     it("should resolve successfully", async () => {
       await expect(getEditPlan("test-planId")).resolves.not.toThrow()
@@ -85,22 +61,6 @@ describe("editPlans API", () => {
     })
   })
 
-  describe("createEditPlan", () => {
-    it("should resolve successfully", async () => {
-      await expect(createEditPlan({ name: "test-item" })).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(createEditPlan({ name: "test-item" })).rejects.toThrow()
-    })
-  })
-
   describe("updateEditPlan", () => {
     it("should resolve successfully", async () => {
       await expect(updateEditPlan("test-planId")).resolves.not.toThrow()
@@ -117,54 +77,6 @@ describe("editPlans API", () => {
     })
   })
 
-  describe("deleteEditPlan", () => {
-    it("should resolve successfully", async () => {
-      await expect(deleteEditPlan("test-planId")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(deleteEditPlan("test-planId")).rejects.toThrow()
-    })
-  })
-
-  describe("generateEditPlan", () => {
-    it("should resolve successfully", async () => {
-      await expect(generateEditPlan("test-planId")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(generateEditPlan("test-planId")).rejects.toThrow()
-    })
-  })
-
-  describe("getGenerationStatus", () => {
-    it("should resolve successfully", async () => {
-      await expect(getGenerationStatus("test-planId")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(getGenerationStatus("test-planId")).rejects.toThrow()
-    })
-  })
-
   describe("aiRecommendClips", () => {
     it("should resolve successfully", async () => {
       await expect(aiRecommendClips("test-planId")).resolves.not.toThrow()
@@ -181,22 +93,6 @@ describe("editPlans API", () => {
     })
   })
 
-  describe("getEditPlanGenerations", () => {
-    it("should resolve successfully", async () => {
-      await expect(getEditPlanGenerations("test-planId")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(getEditPlanGenerations("test-planId")).rejects.toThrow()
-    })
-  })
-
   describe("getGenerationTaskResults", () => {
     it("should resolve successfully", async () => {
       await expect(getGenerationTaskResults("test-taskId")).resolves.not.toThrow()
@@ -213,22 +109,6 @@ describe("editPlans API", () => {
     })
   })
 
-  describe("cancelGeneration", () => {
-    it("should resolve successfully", async () => {
-      await expect(cancelGeneration("test-planId")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(cancelGeneration("test-planId")).rejects.toThrow()
-    })
-  })
-
   describe("getEditPlanClips", () => {
     it("should resolve successfully", async () => {
       await expect(getEditPlanClips("test-planId")).resolves.not.toThrow()
@@ -357,22 +237,6 @@ describe("editPlans API", () => {
     })
   })
 
-  describe("copyEditPlan", () => {
-    it("should resolve successfully", async () => {
-      await expect(copyEditPlan("test-planId")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(copyEditPlan("test-planId")).rejects.toThrow()
-    })
-  })
-
   describe("getMediaAssets", () => {
     it("should resolve successfully", async () => {
       await expect(getMediaAssets("test-libraryId?")).resolves.not.toThrow()

apps/web/src/test/api/templates.test.ts

@@ -5,7 +5,6 @@ import {
   getTemplate,
   toggleFavoriteTemplate,
   copyTemplate,
-  generateFromTemplate,
 } from "@/api/templates"
 
 const mockGet = vi.fn()
@@ -116,20 +115,4 @@ describe("templates API", () => {
       await expect(copyTemplate("test-templateId")).rejects.toThrow()
     })
   })
-
-  describe("generateFromTemplate", () => {
-    it("should resolve successfully", async () => {
-      await expect(generateFromTemplate("test-templateId")).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(generateFromTemplate("test-templateId")).rejects.toThrow()
-    })
-  })
 })

apps/web/src/test/pages/EditingPlanner.test.tsx

@@ -148,14 +148,9 @@ vi.mock("@/api/editing-planner", () => ({
 
 vi.mock("@/api/template-editor", () => ({
   getMediaAssets: vi.fn().mockResolvedValue({ items: [] }),
-  getEditPlanGenerations: vi.fn().mockResolvedValue({ items: [] }),
   getEditPlan: vi.fn().mockResolvedValue({}),
-  createEditPlan: vi.fn().mockResolvedValue({ id: "test-plan" }),
   updateEditPlan: vi.fn().mockResolvedValue({}),
-  generateEditPlan: vi.fn().mockResolvedValue({ task_id: "test-task" }),
-  getGenerationStatus: vi.fn().mockResolvedValue({ status: "completed" }),
   getGenerationTaskResults: vi.fn().mockResolvedValue({ items: [] }),
-  cancelGeneration: vi.fn().mockResolvedValue({}),
   getEditPlanClips: vi.fn().mockResolvedValue({ items: [] }),
   createEditPlanClip: vi.fn().mockResolvedValue({}),
   batchDeleteEditPlanClips: vi.fn().mockResolvedValue({}),
@@ -225,12 +220,6 @@ vi.mock("@/pages/editing-planner/components/StickerPanel", () => ({
 vi.mock("@/pages/editing-planner/components/SaveModal", () => ({
   default: () => React.createElement("div", { "data-testid": "SaveModal" }),
 }))
-vi.mock("@/pages/editing-planner/components/GenerationHistoryModal", () => ({
-  default: () => React.createElement("div", { "data-testid": "GenerationHistoryModal" }),
-}))
-vi.mock("@/pages/editing-planner/components/GenerationProgressModal", () => ({
-  default: () => React.createElement("div", { "data-testid": "GenerationProgressModal" }),
-}))
 
 // === useUndoRedo hook mock ===
 vi.mock("@/pages/editing-planner/hooks/useUndoRedo", () => ({

apps/web/src/test/pages/GeneratePage.test.tsx

@@ -214,12 +214,6 @@ vi.mock("@/api/titles", () => ({
 }))
 
 vi.mock("@/api/template-editor", () => ({
-  generateEditPlan: vi.fn().mockResolvedValue({
-    plan_id: "test-plan",
-    generation_task_id: "test-task",
-    plan_status: "processing",
-    clip_count: 5,
-  }),
   updateEditPlan: vi.fn().mockResolvedValue({ plan_id: "test-plan", template_id: "test-template" }),
   getEditPlan: vi.fn().mockResolvedValue({
     plan_id: "test-plan",
@@ -228,9 +222,6 @@ vi.mock("@/api/template-editor", () => ({
     config: {},
     status: "draft",
   }),
-  getGenerationStatus: vi
-    .fn()
-    .mockResolvedValue({ plan_status: "completed", generation_task_id: "test-task", clips: [] }),
   getGenerationTaskResults: vi.fn().mockResolvedValue({ items: [] }),
 }))
 

apps/web/src/test/pages/TemplateLibrary.test.tsx

@@ -109,7 +109,6 @@ vi.mock("@/api/templates", () => ({
   getTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
   toggleFavoriteTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
   copyTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
-  generateFromTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
 }))
 
 vi.mock("@/pages/templates/TemplateLibrary.css", () => ({}))

apps/web/src/test/pages/editing-planner/components/GenerationHistoryModal.test.tsx

@@ -1,39 +0,0 @@
-import { describe, expect, it, vi } from "vitest"
-import { render } from "@testing-library/react"
-import GenerationHistoryModal from "@/pages/editing-planner/components/GenerationHistoryModal"
-
-const defaultProps = {
-  open: true,
-  loading: false,
-  history: [],
-  onClose: vi.fn(),
-  onCancel: vi.fn(),
-  cancelLoading: false,
-}
-
-describe("GenerationHistoryModal", () => {
-  it("should render without crashing", () => {
-    const { container } = render(<GenerationHistoryModal {...defaultProps} />)
-    expect(container).toBeTruthy()
-  })
-
-  it("should not render when open is false", () => {
-    const { container } = render(<GenerationHistoryModal {...defaultProps} open={false} />)
-    expect(container.firstChild).toBeNull()
-  })
-
-  it("should render with history items", () => {
-    const history = [
-      {
-        id: "1",
-        status: "completed",
-        created_at: "2024-01-01T00:00:00Z",
-        duration: 60,
-      },
-    ]
-    const { container } = render(
-      <GenerationHistoryModal {...defaultProps} history={history as any} />,
-    )
-    expect(container).toBeTruthy()
-  })
-})

apps/web/src/test/pages/editing-planner/components/GenerationProgressModal.test.tsx

@@ -1,102 +0,0 @@
-import { describe, expect, it, vi } from "vitest"
-import { render } from "@testing-library/react"
-import GenerationProgressModal from "@/pages/editing-planner/components/GenerationProgressModal"
-
-const baseProps = {
-  open: true,
-  voiceoverDuration: null,
-  estimatedDuration: 60,
-  onDurationChange: vi.fn(),
-  onGenerate: vi.fn(),
-  task: null,
-  submitting: false,
-  onCancel: vi.fn(),
-  onRetry: vi.fn(),
-  onClose: vi.fn(),
-}
-
-describe("GenerationProgressModal", () => {
-  it("should render setup phase", () => {
-    const { container } = render(<GenerationProgressModal {...baseProps} phase="setup" />)
-    expect(container).toBeTruthy()
-  })
-
-  it("should render progress phase without task", () => {
-    const { container } = render(<GenerationProgressModal {...baseProps} phase="progress" />)
-    expect(container).toBeTruthy()
-  })
-
-  it("should render progress phase with task data", () => {
-    const { container } = render(
-      <GenerationProgressModal
-        {...baseProps}
-        phase="progress"
-        task={
-          {
-            id: "task-123",
-            status: "generating_video",
-            progress: 50,
-            current_step: "generating_video",
-            user_message: "正在生成视频",
-          } as any
-        }
-      />,
-    )
-    expect(container).toBeTruthy()
-  })
-
-  it("should render completed phase", () => {
-    const { container } = render(
-      <GenerationProgressModal
-        {...baseProps}
-        phase="completed"
-        task={{ id: "task-1", status: "completed", progress: 100 } as any}
-      />,
-    )
-    expect(container).toBeTruthy()
-  })
-
-  it("should render failed phase with retry", () => {
-    const { container } = render(
-      <GenerationProgressModal
-        {...baseProps}
-        phase="failed"
-        task={
-          {
-            id: "task-1",
-            status: "failed",
-            progress: 30,
-            error_message: "生成失败",
-            retryable: true,
-          } as any
-        }
-      />,
-    )
-    expect(container).toBeTruthy()
-  })
-
-  it("should render failed phase without retry", () => {
-    const { container } = render(
-      <GenerationProgressModal
-        {...baseProps}
-        phase="failed"
-        task={
-          {
-            id: "task-1",
-            status: "failed",
-            progress: 30,
-            retryable: false,
-          } as any
-        }
-      />,
-    )
-    expect(container).toBeTruthy()
-  })
-
-  it("should not render when closed", () => {
-    const { container } = render(
-      <GenerationProgressModal {...baseProps} phase="setup" open={false} />,
-    )
-    expect(container).toBeTruthy()
-  })
-})

apps/web/src/test/pages/editing-planner/smoke.test.tsx

@@ -31,8 +31,6 @@ import "@/pages/editing-planner/components/ClipPropertiesPanel"
 import "@/pages/editing-planner/components/EditorClipList"
 import "@/pages/editing-planner/components/EditingDrawers"
 import "@/pages/editing-planner/components/FilterPanel"
-import "@/pages/editing-planner/components/GenerationHistoryModal"
-import "@/pages/editing-planner/components/GenerationProgressModal"
 import "@/pages/editing-planner/components/GreenScreenPanel"
 import "@/pages/editing-planner/components/IntroOutroPanel"
 import "@/pages/editing-planner/components/MediaPanel"

apps/worker/video_processing/__init__.py

@@ -7,7 +7,7 @@ VideoProcessor 等）按需从子模块导入，避免 __init__ 阶段引入
 packages / DB 等重依赖。
 """
 
-# 共享工具模块（零外部依赖，供 editing_modes / generation / edit_plan_generation 等复用）
+# 共享工具模块（零外部依赖，供 editing_modes / generation 等复用）
 from . import dedup_helpers, ffmpeg_utils, oss_helpers, url_security
 
 __all__ = [

apps/worker/video_processing/dedup_helpers.py

@@ -1,6 +1,6 @@
 """查重辅助函数 — 从 generation.py 提取的 GeneratedVideo 记录 + 查重逻辑.
 
-供 render_edit_plan 和 generate_video 共同复用，
+供 generate_video 共同复用，
 创建 GeneratedVideo 记录后计算指纹并执行项目级 + 批次内查重。
 """
 

apps/worker/video_processing/oss_helpers.py

@@ -1,4 +1,4 @@
-"""OSS 工具函数 — 从 generation.py / edit_plan_generation.py 提取的共享 OSS 操作.
+"""OSS 工具函数 — 从 generation.py 提取的共享 OSS 操作.
 
 提供 OSS 配置读取、Bucket 创建、素材上传/下载、asset_id → 本地路径解析
 等能力，供 render_edit_plan 和 generate_video 共同复用。

apps/worker/video_processing/render_adapter.py

@@ -84,6 +84,7 @@ class RenderAdapterResult:
     cover_candidates: list[dict] | None = (
         None  # 封面候选帧 [{"image_url": "...", "frame_time": 5.0, "storage_key": "..."}]
     )
+    temp_dir: str | None = None  # 渲染临时目录，成功时由调用方清理，失败时由 finally 清理
 
     def __post_init__(self):
         if self.rendered_clip_ids is None:
@@ -128,6 +129,7 @@ class RenderAdapter:
         job_id: str = "",
         work_dir: Path | None = None,
         progress_cb: ProgressCallback | None = None,
+        voiceover_audio_path: str | None = None,
     ) -> RenderAdapterResult:
         """渲染一个 EditPlan。
 
@@ -142,6 +144,7 @@ class RenderAdapter:
             job_id: 关联的 Job ID（用于结果存储路径）
             work_dir: 工作目录，不传则使用临时目录
             progress_cb: 进度回调函数
+            voiceover_audio_path: 配音音频本地路径（一键生成场景使用）
 
         Returns:
             RenderAdapterResult
@@ -198,7 +201,7 @@ class RenderAdapter:
             self._report_progress(progress_cb, 35.0, "准备 BGM 音频")
 
             # 3~6. 统一渲染核心流程（BGM + ASR + 渲染 + 缩略图 + 上传）
-            return self._do_render(
+            result = self._do_render(
                 plan=plan,
                 clips=ready_clips,
                 asset_path_map=asset_path_map,
@@ -208,7 +211,13 @@ class RenderAdapter:
                 progress_cb=progress_cb,
                 rendered_clip_ids=rendered_clip_ids,
                 failed_clip_ids=failed_clip_ids,
+                voiceover_audio_path=voiceover_audio_path,
             )
+            # 成功时将临时目录所有权转移给调用方，阻止 finally 清理
+            if result.success and temp_dir:
+                result.temp_dir = temp_dir
+                temp_dir = None  # 阻止 finally 块清理
+            return result
 
         except subprocess.CalledProcessError as exc:
             stderr_text = (exc.stderr or "").strip()
@@ -585,14 +594,11 @@ class RenderAdapter:
         try:
             from video_processing.thumbnail_generator import extract_and_upload_cover_frames
 
-            # 从 plan config 提取标题文字，叠加到封面候选帧上
+            # 已渲染视频在统一渲染阶段已通过 ASS 字幕把标题烧录进画面，
-            _title_cfg = (plan_config or {}).get("title", {}) or {}
+            # 抽帧天然带标题，因此这里传空字符串，避免 Pillow 二次叠加导致重影。
-            if not isinstance(_title_cfg, dict):
+            # Pillow 叠加仅用于 API 从源素材抽帧（源素材本身无标题）的兜底场景。
-                _title_cfg = {}
-            _title_text = (_title_cfg.get("text", "") or "").strip() if _title_cfg.get("enabled", True) else ""
-
             cover_candidates = extract_and_upload_cover_frames(
-                str(result.output_path), plan_id, num_frames=3, title_text=_title_text
+                str(result.output_path), plan_id, num_frames=3, title_text=""
             )
             if cover_candidates:
                 logger.info(

apps/worker/video_processing/render_audio.py

@@ -67,6 +67,16 @@ def clip_has_audio(ctx: RenderContext, clip: ResolvedClip) -> bool:
     return ctx._audio_cache[key]
 
 
+def _clip_volume(clip: ResolvedClip) -> float:
+    """读取 clip 的音量配置（0.0~1.0，>1 放大）。缺省 1.0 原声。"""
+    cfg = getattr(clip, "config", None) or {}
+    try:
+        vol = float(cfg.get("volume", 1.0))
+    except (TypeError, ValueError):
+        return 1.0
+    return max(0.0, vol)
+
+
 # ── 音频混音 ──────────────────────────────────────────────────────────────────
 
 
@@ -82,12 +92,13 @@ def mix_audio(
     """音频后处理混音.
 
     处理逻辑：
-    1. 丢弃主图层（main/broll/overlay/corner_voice）的原始音频，避免录入源视频杂音
+    1. 保留主图层（main/broll/overlay/corner_voice）视频素材的原声，按顺序 concat 拼接
-    2. 仅使用独立音频轨（audio role，TTS/配音）作为主音频
+    2. 每个 clip 按 config.volume 应用音量（volume=0 静音，=1 原声）
-    3. 如果提供了 bgm_path，则额外混入 BGM（支持淡入淡出、循环、人声闪避）
+    3. 独立音频轨（audio role，TTS/配音）通过 amix 混入
-    4. 如果配置了 audio_tracks，则混入多轨道音频（配音、音效等）
+    4. 如果提供了 bgm_path，则额外混入 BGM（支持淡入淡出、循环、人声闪避）
-    5. 输出时长截断到 video_duration
+    5. 如果配置了 audio_tracks，则混入多轨道音频（配音、音效等）
-    6. 如果配置了降噪，最后应用降噪
+    6. 输出时长截断到 video_duration
+    7. 如果配置了降噪，最后应用降噪
 
     Args:
         ctx: 渲染上下文
@@ -123,10 +134,12 @@ def mix_audio(
     if "audio" in layer_map:
         audio_clips = layer_map["audio"].clips
 
-    # ── 丢弃源视频的原始音频（避免录入杂音），成片仅保留 TTS 配音 + BGM ──
+    # ── 保留源视频原声：过滤掉无音频流的 main clip（图片/无声素材） ──
-    main_clips = []
+    # 注意：volume=0 的 clip 不能移除——移除会导致后续 clip 音频时间轴前移、音画不同步。
+    # volume=0 通过滤镜链生成静音流，保持时间轴对齐。
+    main_clips = [c for c in main_clips if clip_has_audio(ctx, c)]
 
-    # ── 防御：过滤掉无音频流的 clip ──
+    # ── 防御：过滤掉无音频流的独立音频轨 ──
     audio_clips = [c for c in audio_clips if clip_has_audio(ctx, c)]
 
     if not main_clips and not audio_clips:
@@ -144,7 +157,7 @@ def mix_audio(
     # 构建音频处理命令
     output_path = ctx.work_dir / f"audio_{ctx.plan_id}.aac"
 
-    # 源视频原始音频已被丢弃（main_clips = []），最终音频完全由独立音频轨 + BGM + 多轨配置组成。
+    # 主音频为视频素材原声 concat；独立音频轨（TTS/配音）通过 amix 混入。
     # 当无 main_clips 时，将独立音频轨作为主音频走 concat 拼接；当二者均有则走 amix 混音。
     if main_clips:
         effective_main = main_clips
@@ -266,28 +279,67 @@ def concat_main_audio(
         has_speed = abs(speed - 1.0) >= 1e-6
 
         if not has_speed and not has_reverse:
-            # 无调速无倒放：简单命令行，-ss 裁剪更高效
+            # 无调速无倒放：根据是否需要裁剪/音量选择最高效的路径。
-            command = [
+            vol = _clip_volume(clip)
-                FFMPEG_BIN,
+            need_trim = trim_start > 0 or (effective_duration > 0 and final_duration < adjusted_duration)
-                "-y",
+            need_volume = abs(vol - 1.0) >= 1e-6
-                "-i",
+
-                str(clip.local_path),
+            if need_trim:
-                "-vn",
+                # 需要裁剪：用 atrim 滤镜在滤镜链中精确裁剪（采样点级精度，不浪费解码）。
-                "-acodec",
+                # 滤镜顺序：atrim → asetpts → volume（先裁剪再调音量，避免处理被丢弃的数据）。
-                "aac",
+                af_parts: list[str] = []
-                "-b:a",
+                if trim_start > 0 and effective_duration > 0:
-                "128k",
+                    af_parts.append(f"atrim=start={trim_start:.3f}:duration={final_duration:.3f}")
-                "-ar",
+                elif trim_start > 0:
-                "48000",
+                    af_parts.append(f"atrim=start={trim_start:.3f}")
-                "-ac",
+                elif final_duration > 0:
-                "2",
+                    af_parts.append(f"atrim=duration={final_duration:.3f}")
-            ]
+                af_parts.append("asetpts=PTS-STARTPTS")
-            if trim_start > 0:
+                if need_volume:
-                command.extend(["-ss", f"{trim_start:.3f}"])
+                    af_parts.append(f"volume={vol:.4f}")
-            if final_duration > 0:
+                command = [
-                command.extend(["-t", f"{final_duration:.3f}"])
+                    FFMPEG_BIN,
-            command.append(str(output_path))
+                    "-y",
-            run_ffmpeg(command)
+                    "-i",
+                    str(clip.local_path),
+                    "-vn",
+                    "-af",
+                    ",".join(af_parts),
+                    "-acodec",
+                    "aac",
+                    "-b:a",
+                    "128k",
+                    "-ar",
+                    "48000",
+                    "-ac",
+                    "2",
+                ]
+                # atrim 已精确控制时长，无需额外 -t
+                command.append(str(output_path))
+                run_ffmpeg(command)
+            else:
+                # 无需裁剪：直接提取，最高效。音量用单个 -af（如有）。
+                command = [
+                    FFMPEG_BIN,
+                    "-y",
+                    "-i",
+                    str(clip.local_path),
+                    "-vn",
+                    "-acodec",
+                    "aac",
+                    "-b:a",
+                    "128k",
+                    "-ar",
+                    "48000",
+                    "-ac",
+                    "2",
+                ]
+                if need_volume:
+                    command.extend(["-af", f"volume={vol:.4f}"])
+                if final_duration > 0:
+                    command.extend(["-t", f"{final_duration:.3f}"])
+                command.append(str(output_path))
+                run_ffmpeg(command)
         else:
             # 有调速或倒放：用 filter_complex
             speed_engine = SpeedEngine()
@@ -312,6 +364,11 @@ def concat_main_audio(
                 if reverse_filter:
                     audio_filters.append(reverse_filter)
 
+            # 音量
+            vol = _clip_volume(clip)
+            if abs(vol - 1.0) >= 1e-6:
+                audio_filters.append(f"volume={vol:.4f}")
+
             # aformat 归一化：统一输出格式为 48000Hz + stereo + fltp
             audio_filters.append("aformat=sample_rates=48000:channel_layouts=stereo:sample_fmts=fltp")
 
@@ -378,6 +435,11 @@ def concat_main_audio(
             if reverse_filter:
                 audio_filters.append(reverse_filter)
 
+        # 音量（0=静音，1=原声）
+        vol = _clip_volume(clip)
+        if abs(vol - 1.0) >= 1e-6:
+            audio_filters.append(f"volume={vol:.4f}")
+
         # aformat 归一化：统一采样率48000Hz + 双声道stereo + fltp采样格式
         # concat filter 要求所有输入音频参数完全一致，否则 exit=234 失败
         audio_filters.append("aformat=sample_rates=48000:channel_layouts=stereo:sample_fmts=fltp")

apps/worker/video_processing/thumbnail_generator.py

@@ -1,7 +1,8 @@
-"""视频封面抽帧工具 — 从已渲染视频中抽取帧作为封面。
+"""视频封面抽帧工具 — 从视频中抽取帧作为封面，支持标题文字叠加。
 
-统一封面管道：视频渲染时标题已通过 ASS 字幕烧进视频，
+统一封面管道：
-渲染完成后直接从此视频抽帧，封面天然带标题，无需额外叠加逻辑。
+- 从已渲染视频抽帧：标题已通过 ASS 字幕烧进视频，帧天然带标题，无需再叠加。
+- 从源素材抽帧（API E2 兜底）：源素材无标题，通过 Pillow 在帧上绘制标题文字。
 """
 
 from __future__ import annotations
@@ -12,6 +13,40 @@ from pathlib import Path
 
 logger = logging.getLogger(__name__)
 
+# ── 标题叠加（Pillow）──────────────────────────────────────────────────────
+# 实现统一放在 packages/shared/title_overlay.py，API 和 Worker 共用。
+
+
+def apply_title_overlay(
+    image_path: str,
+    title_text: str,
+    *,
+    color: str = "#ffffff",
+    position: str = "bottom",
+    font_size: int | None = None,
+    margin_ratio: float = 0.06,
+    stroke_width_ratio: float = 0.04,
+) -> str:
+    """在图片上绘制标题文字（指定颜色 + 黑色描边/阴影）。
+
+    委托给 packages.shared.title_overlay.apply_title_to_image，
+    保持 Worker 内调用方式不变。title_text 为空时直接返回原路径。
+    """
+    from packages.shared.title_overlay import apply_title_to_image
+
+    if not title_text or not title_text.strip():
+        return image_path
+    result = apply_title_to_image(
+        image_path,
+        title_text,
+        color=color,
+        position=position,
+        font_size=font_size,
+        margin_ratio=margin_ratio,
+        stroke_width_ratio=stroke_width_ratio,
+    )
+    return result or image_path
+
 
 def extract_first_frame(
     video_path: str,
@@ -175,6 +210,9 @@ def extract_and_upload_cover_frames(
     *,
     num_frames: int = 3,
     title_text: str = "",
+    title_color: str = "#ffffff",
+    title_position: str = "bottom",
+    title_font_size: int | None = None,
 ) -> list[dict]:
     """从视频中抽取多帧作为封面候选，上传到 OSS。
 
@@ -182,7 +220,11 @@ def extract_and_upload_cover_frames(
         video_path: 视频文件路径
         plan_id: 编辑计划 ID（用于生成 storage key）
         num_frames: 抽取帧数（默认 3）
-        title_text: 标题文字（当前版本未叠加，预留参数）
+        title_text: 标题文字；非空时用 Pillow 叠加到每帧。
+            从已渲染视频抽帧时通常传空（标题已烧录）；从源素材抽帧时传标题。
+        title_color: 标题字体颜色（#RRGGBB）
+        title_position: 标题位置 top/center/bottom
+        title_font_size: 标题字号，None 时自动计算
 
     Returns:
         封面候选列表，每项包含 {"url": str, "position": float}
@@ -208,6 +250,15 @@ def extract_and_upload_cover_frames(
                 seek_ratio=ratio,
                 min_seek_seconds=0.5,
             )
+            # 从源素材抽帧时叠加标题文字；已渲染视频标题已烧录时传空字符串跳过
+            if title_text and title_text.strip():
+                apply_title_overlay(
+                    frame_path,
+                    title_text,
+                    color=title_color,
+                    position=title_position,
+                    font_size=title_font_size,
+                )
             storage_key = f"covers/{plan_id}/frame_{i}.jpg"
             url = upload_to_oss(frame_path, storage_key)
             if url:

apps/worker/video_processing/unified_render_service.py

@@ -36,6 +36,7 @@ from video_processing.ffmpeg_utils import (
     DEFAULT_TRANSITION_DURATION,
     FFMPEG_BIN,
     probe_duration,
+    probe_has_audio,
     probe_video_info,
     run_ffmpeg,
 )
@@ -1000,6 +1001,11 @@ class UnifiedRenderService:
         if abs(speed - 1.0) >= 1e-6:
             return False, f"有调速: speed={speed:.2f}x"
 
+        # 音量非默认（静音/放大）→ 需要音频滤镜重编码 → 不能 copy
+        vol = UnifiedRenderService._clip_volume(clip)
+        if abs(vol - 1.0) >= 1e-6:
+            return False, f"音量非默认: volume={vol:.2f}"
+
         # 有倒放 → 需要重编码 → 不能 copy
         reverse_config = ReverseConfig.from_dict(clip.config.get("reverse"))
         if reverse_config.enabled and (reverse_config.reverse_video or reverse_config.reverse_audio):
@@ -1270,13 +1276,23 @@ class UnifiedRenderService:
             "+faststart",
         ]
 
-        # 音频处理：background 通常是图片无音频，跳过；其他编码为 aac
+        # 音频处理：background 通常是图片无音频，跳过；其他角色先探测是否真有音频流。
-        # background 以外的视频素材，默认带音频
+        # volume=0 不丢弃音频流，而是保留后通过 volume=0 滤镜静音，保持时间轴对齐。
-        has_audio = role != "background"
+        clip_volume = UnifiedRenderService._clip_volume(clip)
+        if role != "background":
+            try:
+                has_audio = probe_has_audio(clip.local_path)
+            except Exception as e:
+                # probe_has_audio 内部已保守返回 True；只有极端错误才会到这里。
+                # 此时不静默丢音频，记录 error 并向上抛出，让任务失败而不是产出无声视频。
+                logger.error("[unified-render] 探测音频流发生致命错误，终止渲染: %s: %s", clip.local_path, e)
+                raise
+        else:
+            has_audio = False
         if has_audio:
             af_parts: list[str] = []
 
-            # 音频降噪
+            # 音频降噪（最先处理：在原始信号上降噪效果最好）
             try:
                 from video_processing.noise_reduction_engine import NoiseReductionConfig, NoiseReductionEngine
 
@@ -1290,13 +1306,16 @@ class UnifiedRenderService:
             except Exception as e:
                 logger.warning("[unified-render] 直通模式音频降噪应用失败，跳过: %s", e)
 
-            # 音频调速（与视频setpts对应，保持音画同步）
+            # 音频调速（在降噪之后、音量之前，与 render_audio.py concat 路径保持一致）
+            # SpeedEngine.build_audio_filter 内部已实现多级 atempo 串联，
+            # 自动处理超出 [0.5, 2.0] 范围的速度（如 0.25x → atempo=0.5,atempo=0.5）。
             speed = UnifiedRenderService._clip_speed(clip)
             if abs(speed - 1.0) >= 1e-6:
                 try:
                     from video_processing.speed_engine import SpeedConfig, SpeedEngine
 
                     speed_cfg = SpeedConfig(speed=speed)
+                    speed_cfg.clamp()
                     speed_engine = SpeedEngine()
                     af_parts.append(speed_engine.build_audio_filter(speed_cfg))
                 except Exception as e:
@@ -1309,6 +1328,10 @@ class UnifiedRenderService:
                 if af_filter:
                     af_parts.append(af_filter)
 
+            # 片段音量（最后应用：确保调速/倒放后的最终输出音量准确，与 concat 路径一致）
+            if abs(clip_volume - 1.0) >= 1e-6:
+                af_parts.append(f"volume={clip_volume:.4f}")
+
             if af_parts:
                 command.extend(["-af", ",".join(af_parts)])
 
@@ -1976,6 +1999,16 @@ class UnifiedRenderService:
         """
         return _clip_playback_speed_pure(getattr(clip, "playback_speed", 1.0))
 
+    @staticmethod
+    def _clip_volume(clip: ResolvedClip) -> float:
+        """获取 clip 的音量（config.volume）。缺省 1.0 原声，0.0 静音。"""
+        cfg = getattr(clip, "config", None) or {}
+        try:
+            vol = float(cfg.get("volume", 1.0))
+        except (TypeError, ValueError):
+            return 1.0
+        return max(0.0, vol)
+
     @staticmethod
     def _clip_adjusted_duration(clip: ResolvedClip) -> float:
         """计算调速后的 clip 实际时长（用于拼接计算）。

apps/worker/worker_app/celery_app.py

@@ -14,9 +14,17 @@ celery_app.conf.imports = (
     "worker_app.tasks.voice_extraction",
     "worker_app.tasks.voice_clone",
     "worker_app.tasks.tts_synthesis",
-    "worker_app.tasks.edit_plan_generation",
-    "worker_app.tasks.compose_video",
     "worker_app.tasks.batch_download",
     "worker_app.tasks._startup",
     "apps.worker.video_processing.dedup",
+    "worker_app.tasks.cleanup",
 )
+
+# Celery Beat 定时任务调度
+celery_app.conf.beat_schedule = {
+    "cleanup-stale-pending-tasks": {
+        "task": "worker.cleanup_stale_pending_tasks",
+        "schedule": 600.0,  # 每 10 分钟（秒）
+        "options": {"expires": 300},  # 5 分钟过期，避免堆积
+    },
+}

apps/worker/worker_app/tasks/__init__.py

@@ -25,10 +25,6 @@ def __getattr__(name: str):
         from .voice_extraction import extract_voice_task
 
         return extract_voice_task
-    elif name == "compose_video":
-        from .compose_video import compose_video
-
-        return compose_video
     elif name == "extract_background_task":
         from .voice_extraction import extract_background_task
 
@@ -58,7 +54,6 @@ def __getattr__(name: str):
 
 __all__ = [
     "classify_asset",
-    "compose_video",
     "generate_video",
     "healthcheck",
     "ingest_asset",

apps/worker/worker_app/tasks/_startup.py

@@ -10,6 +10,9 @@ logger = logging.getLogger(__name__)
 # 孤儿任务超时阈值：渲染任务超过此时间未更新则视为卡死
 ORPHAN_TASK_TIMEOUT_MINUTES = 10
 
+# Pending 任务超时阈值：pending 任务在队列中等待超过此时间则自动清理
+PENDING_TASK_TIMEOUT_MINUTES = 30
+
 
 def cleanup_orphan_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> int:  # pragma: no cover
     """清理数据库中超时未更新的 running GenerationTask（孤儿任务）。
@@ -83,6 +86,38 @@ def cleanup_stale_jobs(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> in
         return 0
 
 
+def cleanup_stale_pending_tasks(timeout_minutes: int = PENDING_TASK_TIMEOUT_MINUTES) -> int:  # pragma: no cover
+    """清理数据库中卡在 pending 状态超时的 GenerationTask。
+
+    全局任务队列有 pending 数量上限，长期卡在 pending 的任务会占满队列，
+    导致新用户无法创建任务。通过 created_at 超时判断并标记为 failed。
+
+    Args:
+        timeout_minutes: 超时时间（分钟），默认 PENDING_TASK_TIMEOUT_MINUTES
+
+    Returns:
+        清理的任务数量
+    """
+    from packages.adapters.sqlalchemy_impl.generation_task_repository import (
+        SQLAlchemyGenerationTaskRepository,
+    )
+
+    session = SessionLocal()
+    try:
+        repo = SQLAlchemyGenerationTaskRepository(session)
+        count = repo.cleanup_stale_pending(timeout_minutes)
+        if count > 0:
+            logger.warning("清理了 %d 个超时的 pending GenerationTask（超过 %d 分钟未处理）", count, timeout_minutes)
+        else:
+            logger.info("无超时 pending GenerationTask 需要清理")
+        return count
+    except Exception as e:
+        logger.error("清理超时 pending GenerationTask 失败: %s", e, exc_info=True)
+        return 0
+    finally:
+        session.close()
+
+
 def cleanup_all_stale_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> dict:  # pragma: no cover
     """统一清理所有超时的孤儿任务。
 
@@ -93,15 +128,17 @@ def cleanup_all_stale_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES)
     """
     gen_count = cleanup_orphan_tasks(timeout_minutes)
     job_count = cleanup_stale_jobs(timeout_minutes)
-    total = gen_count + job_count
+    pending_count = cleanup_stale_pending_tasks(PENDING_TASK_TIMEOUT_MINUTES)
+    total = gen_count + job_count + pending_count
     if total > 0:
         logger.warning(
-            "孤儿任务清理完成: GenerationTask=%d, Job=%d, 总计=%d",
+            "任务清理完成: 孤儿 GenerationTask=%d, 孤儿 Job=%d, 超时 pending=%d, 总计=%d",
             gen_count,
             job_count,
+            pending_count,
             total,
         )
-    return {"generation_tasks": gen_count, "jobs": job_count}
+    return {"generation_tasks": gen_count, "jobs": job_count, "pending": pending_count}
 
 
 @worker_ready.connect

apps/worker/worker_app/tasks/cleanup.py

@@ -0,0 +1,35 @@
+"""定期清理任务 — Celery Beat 调度。
+
+包含：
+- cleanup_stale_pending_tasks: 定期清理卡在 pending 超时的 generation_tasks
+"""
+
+import logging
+
+from celery import shared_task
+from worker_app.tasks._startup import (
+    PENDING_TASK_TIMEOUT_MINUTES,
+    cleanup_stale_pending_tasks,
+)
+
+logger = logging.getLogger(__name__)
+
+
+@shared_task(name="worker.cleanup_stale_pending_tasks")
+def scheduled_cleanup_stale_pending(timeout_minutes: int = PENDING_TASK_TIMEOUT_MINUTES) -> dict:
+    """Celery Beat 调度的定期任务：清理超时的 pending 任务。
+
+    每 10 分钟执行一次（由 celery_app.py 的 beat_schedule 配置），
+    查找所有 status='pending' 且 created_at < NOW() - timeout_minutes
+    的 generation_tasks，批量更新为 failed。
+
+    Args:
+        timeout_minutes: 超时时间（分钟），默认 30 分钟
+
+    Returns:
+        {"cleaned": int}
+    """
+    count = cleanup_stale_pending_tasks(timeout_minutes)
+    if count > 0:
+        logger.info("[Beat] 清理了 %d 个超时 pending 任务（超时阈值 %d 分钟）", count, timeout_minutes)
+    return {"cleaned": count}

apps/worker/worker_app/tasks/compose_video.py

@@ -1,198 +0,0 @@
-"""视频合成 Celery 任务 — Phase 8 任务 2.10.
-
-使用 JobService 管理任务生命周期，通过 RenderAdapter 调用 UnifiedRenderService 执行合成。
-"""
-
-from __future__ import annotations
-
-import os
-import subprocess  # pragma: no cover
-import tempfile
-from pathlib import Path
-
-from celery.exceptions import SoftTimeLimitExceeded  # pragma: no cover
-from celery.utils.log import get_task_logger
-from worker_app.celery_app import celery_app
-from worker_app.db import SessionLocal
-
-logger = get_task_logger(__name__)
-
-# 任务超时时间（秒）：超过此时间 Celery 会抛出 SoftTimeLimitExceeded
-RENDER_TASK_SOFT_TIME_LIMIT = 600  # pragma: no cover  # 10 分钟
-# 硬超时：超过此时间进程会被强制 kill
-RENDER_TASK_TIME_LIMIT = 660  # pragma: no cover  # 10 分钟 + 1 分钟清理缓冲
-
-
-def _get_job_service():
-    """延迟导入 JobService，避免循环依赖。"""
-    from apps.api.app.services.job_service import JobService
-    from packages.adapters.sqlalchemy_impl.job_repository import SQLAlchemyJobRepository
-
-    db = SessionLocal()
-    repo = SQLAlchemyJobRepository(db)
-    return JobService(repo), db
-
-
-@celery_app.task(
-    name="worker.compose_video",
-    bind=True,
-    max_retries=3,
-    default_retry_delay=60,
-    soft_time_limit=RENDER_TASK_SOFT_TIME_LIMIT,
-    time_limit=RENDER_TASK_TIME_LIMIT,
-)
-def compose_video(self, job_id: str, **kwargs):  # pragma: no cover
-    """视频合成任务。
-
-    使用 UnifiedRenderService（图层架构）进行渲染。
-
-    Args:
-        job_id: JobService 中的任务 ID
-        **kwargs: 来自 Job.payload 的额外参数（plan_id, output_path 等）
-    """
-    job_service, db = _get_job_service()
-
-    try:
-        job = job_service.get_job(job_id)
-        if job is None:
-            logger.error("Job not found: %s", job_id)
-            return {"status": "error", "message": f"Job {job_id} not found"}
-
-        plan_id = job.payload.get("plan_id", "")
-        if not plan_id:
-            job_service.fail_job(job_id, "Missing plan_id in job payload")
-            return {"status": "error", "message": "Missing plan_id"}
-
-        # 使用 unified 渲染引擎
-        return _compose_with_unified_engine(self, job_service, job, plan_id, db)
-
-    except SoftTimeLimitExceeded:
-        # Celery 软超时：任务执行超过 soft_time_limit
-        error_msg = f"渲染任务超时（超过 {RENDER_TASK_SOFT_TIME_LIMIT // 60} 分钟）"
-        logger.error("视频合成超时: job_id=%s", job_id)
-        try:
-            job_service.fail_job(job_id, error_msg)
-        except Exception:
-            logger.exception("更新 Job 超时失败状态时出错")
-        # 超时不重试
-        return {"status": "error", "message": error_msg, "error_type": "timeout"}
-
-    except subprocess.TimeoutExpired as exc:
-        # FFmpeg 子进程超时
-        error_msg = f"FFmpeg 渲染超时（{exc.timeout}s）"
-        logger.error("视频合成 FFmpeg 超时: job_id=%s timeout=%s", job_id, exc.timeout)
-        try:
-            job_service.fail_job(job_id, error_msg)
-        except Exception:
-            logger.exception("更新 Job 超时失败状态时出错")
-        # 超时不重试
-        return {"status": "error", "message": error_msg, "error_type": "ffmpeg_timeout"}
-
-    except self.retry_exc as exc:
-        logger.warning("视频合成重试中: job_id=%s, exc=%s", job_id, exc)
-        raise
-
-    except subprocess.CalledProcessError as exc:
-        # FFmpeg 执行失败，提取有意义的错误信息
-        from video_processing.video_validation import get_exit_code_message
-
-        exit_msg = get_exit_code_message(exc.returncode)
-        stderr_text = (exc.stderr or "").strip()
-        stderr_tail = stderr_text[-300:] if len(stderr_text) > 300 else stderr_text
-        error_msg = f"渲染失败: {exit_msg}"
-        if stderr_tail:
-            error_msg += f" | {stderr_tail[:200]}"
-
-        logger.error("视频合成 FFmpeg 失败: job_id=%s %s", job_id, exit_msg)
-        try:
-            job_service.fail_job(job_id, error_msg[:500])
-        except Exception:
-            logger.exception("更新 Job 失败状态时出错")
-        # FFmpeg 错误不重试（通常是素材或配置问题）
-        return {"status": "error", "message": error_msg, "error_type": "ffmpeg_error", "exit_code": exc.returncode}
-
-    except Exception as exc:
-        logger.exception("视频合成异常: job_id=%s", job_id)
-        try:
-            job_service.fail_job(job_id, str(exc)[:500])
-        except Exception:
-            logger.exception("更新 Job 失败状态时出错")
-        raise self.retry(exc=exc, countdown=60) from exc
-    finally:
-        db.close()
-
-
-def _compose_with_unified_engine(task, job_service, job, plan_id: str, db) -> dict:  # pragma: no cover
-    """新引擎渲染路径（UnifiedRenderService + RenderAdapter）。"""
-    job_id = job.id
-
-    # 标记为 running
-    job_service.update_progress(job_id, progress=10.0, current_stage="初始化统一渲染引擎")
-
-    from video_processing.render_adapter import RenderAdapter
-
-    adapter = RenderAdapter(db)
-
-    # 校验合成条件
-    job_service.update_progress(job_id, progress=15.0, current_stage="校验合成条件")
-    valid, errors, warnings, ready_count, total_count = adapter.validate_plan(plan_id)
-    if not valid:
-        error_msg = "; ".join(errors)
-        job_service.fail_job(job_id, f"合成校验失败: {error_msg}")
-        return {"status": "error", "message": error_msg}
-
-    # 进度回调
-    def progress_cb(progress: float, stage: str) -> None:
-        try:
-            job_service.update_progress(job_id, progress=progress, current_stage=stage)
-        except Exception:
-            logger.exception("更新进度失败")
-
-    # 执行渲染
-    job_service.update_progress(job_id, progress=20.0, current_stage="开始渲染")
-    logger.info("统一渲染引擎开始: job_id=%s plan_id=%s", job_id, plan_id)
-
-    result = adapter.render_plan(
-        plan_id=plan_id,
-        job_id=job_id,
-        progress_cb=progress_cb,
-    )
-
-    if not result.success:
-        error_msg = f"渲染失败: {result.error_message}"
-        job_service.fail_job(job_id, error_msg[:500])
-        raise RuntimeError(result.error_message)
-
-    # 更新 Job 状态为完成
-    result_data = {
-        "plan_id": plan_id,
-        "output_path": str(result.output_path) if result.output_path else "",
-        "storage_key": f"rendered/{plan_id}/{job_id}.mp4",
-        "output_url": result.output_url,
-        "estimated_duration": result.duration,
-        "clip_count": result.clip_count,
-        "engine": "unified",
-        "width": result.width,
-        "height": result.height,
-        "file_size": result.file_size,
-    }
-    job_service.complete_job(job_id, result=result_data)
-
-    logger.info(
-        "视频合成完成(unified): job_id=%s plan_id=%s duration=%.2fs",
-        job_id,
-        plan_id,
-        result.duration,
-    )
-    return {"status": "completed", "job_id": job_id, "result": result_data}
-
-
-def _cleanup_output(job_id: str) -> None:
-    """清理临时输出文件。"""
-    try:
-        _output_dir = os.environ.get("VIDEO_OUTPUT_DIR", os.path.join(tempfile.gettempdir(), "video_output"))
-        output_path = os.path.join(_output_dir, f"{job_id}.mp4")
-        if Path(output_path).exists():
-            Path(output_path).unlink()
-    except Exception as e:
-        logger.warning(f"清理输出文件失败: {e}", exc_info=True)

apps/worker/worker_app/tasks/edit_plan_generation.py

@@ -1,452 +0,0 @@
-"""剪辑计划渲染任务 — 使用 UnifiedRenderService 统一渲染引擎.
-
-Celery 任务 worker.render_edit_plan:
-  1. 加载 EditPlan + EditPlanClips
-  2. 通过 RenderAdapter 调用 UnifiedRenderService 渲染
-  3. 下载各片段素材 + 渲染
-  4. 上传渲染结果到 OSS
-  5. 创建 GeneratedVideo 记录 + 查重
-  6. 更新 EditPlan / EditPlanClip 状态
-  7. 更新 GenerationTask 进度
-"""
-
-from __future__ import annotations
-
-import logging
-from datetime import datetime, timezone
-from pathlib import Path
-
-from worker_app.celery_app import celery_app
-from worker_app.db import SessionLocal
-
-logger = logging.getLogger(__name__)
-
-OUTPUT_WIDTH = 1280
-OUTPUT_HEIGHT = 720
-OUTPUT_FPS = 25.0
-
-
-# ── 共享工具模块导入 ──────────────────────────────────────────────────────────
-
-from video_processing.dedup_helpers import create_video_record_and_dedup
-
-# ── Repository imports (延迟导入避免循环依赖) ─────────────────────────────────
-
-
-def _get_repos():
-    """获取数据库仓储实例"""
-    from packages.adapters.sqlalchemy_impl import SQLAlchemyEditPlanRepository
-    from packages.adapters.sqlalchemy_impl.edit_plan_clip_repository import (
-        SQLAlchemyEditPlanClipRepository,
-    )
-    from packages.adapters.sqlalchemy_impl.generation_task_repository import (
-        SQLAlchemyGenerationTaskRepository,
-    )
-
-    db = SessionLocal()
-    try:
-        plan_repo = SQLAlchemyEditPlanRepository(db)
-        clip_repo = SQLAlchemyEditPlanClipRepository(db)
-        gen_task_repo = SQLAlchemyGenerationTaskRepository(db)
-        yield plan_repo, clip_repo, gen_task_repo, db
-    finally:
-        db.close()
-
-
-# ── Celery Task ───────────────────────────────────────────────────────────────
-
-
-def _mark_plan_failed(plan_repo, plan_id, gen_task_repo, generation_task_id, error_msg: str):
-    """统一的计划失败标记工具。"""
-    plan = plan_repo.get(plan_id)
-    if plan and plan.status.value == "rendering":
-        plan.mark_failed()
-        plan_repo.update(plan)
-    if generation_task_id:
-        gen_task = gen_task_repo.get(generation_task_id)
-        if gen_task and gen_task.status.value != "failed":
-            gen_task.status = "failed"
-            gen_task.error_message = error_msg
-            gen_task.completed_at = datetime.now(timezone.utc)
-            try:
-                gen_task.append_log(
-                    stage="render_failed",
-                    message=error_msg[:500],
-                    level="ERROR",
-                )
-            except Exception:
-                pass
-            gen_task_repo.update(gen_task)
-
-
-def _finalize_render_success(
-    plan,
-    plan_repo,
-    clip_repo,
-    gen_task_repo,
-    db,
-    plan_id: str,
-    output_url: str,
-    storage_key: str,
-    duration: float,
-    file_size: int,
-    width: int,
-    height: int,
-    rendered_clip_ids: list[str],
-    failed_clip_ids: list[str],
-    generation_task_id: str,
-    output_path: Path,
-    engine: str,
-    thumbnail_url: str = "",
-    cover_candidates: list[dict] | None = None,
-) -> dict:
-    """渲染成功后的统一收尾：查重 + 更新状态 + 返回结果。"""
-    # 创建 GeneratedVideo 记录 + 查重
-    project_id = plan.project_id or ""
-    batch_id = plan.config.get("batch_id", "")
-    mode = plan.config.get("mode", "edit_plan")
-    # 从 plan.config.title.text 读取视频名称
-    plan_config = plan.config or {}
-    title_cfg = plan_config.get("title", {}) or {}
-    if not isinstance(title_cfg, dict):
-        title_cfg = {}
-    video_name = (title_cfg.get("text") or "").strip() or f"generated-{generation_task_id[:8]}.mp4"
-    if generation_task_id:
-        try:
-            create_video_record_and_dedup(
-                generation_task_id=generation_task_id,
-                project_id=project_id,
-                user_id=plan.created_by_user_id or "",
-                batch_id=batch_id,
-                file_url=output_url or "",
-                file_size=file_size,
-                duration=duration,
-                video_path=str(output_path),
-                mode=mode,
-                session=db,
-                width=width,
-                height=height,
-                fps=OUTPUT_FPS,
-                name=video_name,
-                thumbnail_url=thumbnail_url,
-            )
-        except Exception as dedup_err:
-            logger.warning("查重失败（不影响渲染结果）: %s", dedup_err)
-
-    # 更新片段状态为 rendered
-    for clip_id in rendered_clip_ids:
-        clip = clip_repo.get(clip_id)
-        if clip and clip.status.value == "ready":
-            clip.mark_rendered()
-            clip_repo.update(clip)
-
-    # 更新 EditPlan 状态为 completed + 回写实际渲染时长 + 结果数
-    plan.config["rendered_url"] = output_url or ""
-    plan.config["rendered_storage_key"] = storage_key
-    if hasattr(plan, "total_duration") and duration > 0:
-        plan.total_duration = duration
-    plan.mark_completed()
-    plan_repo.update(plan)
-
-    # 更新 GenerationTask 状态为 completed
-    if generation_task_id:
-        gen_task = gen_task_repo.get(generation_task_id)
-        if gen_task:
-            gen_task.status = "completed"
-            gen_task.progress = 100.0
-            # 剪辑计划是多片段合成 1 个成片，result_count = 1
-            gen_task.result_count = 1
-            gen_task.append_log(
-                stage="render_complete",
-                message=f"渲染完成，输出时长 {duration:.1f}s",
-                level="INFO",
-                engine=engine,
-                clip_count=len(rendered_clip_ids),
-            )
-            gen_task.completed_at = datetime.now(timezone.utc)
-
-            # 回写封面 URL 到 GenerationTask，供封面生成接口读取
-            if cover_candidates:
-                first_cover = cover_candidates[0].get("image_url") or cover_candidates[0].get("url") or ""
-                if first_cover:
-                    gen_task.cover_url = first_cover
-                    logger.info(
-                        "预览渲染完成，回写 cover_url: plan_id=%s task_id=%s url=%s",
-                        plan_id,
-                        generation_task_id,
-                        first_cover[:80],
-                    )
-
-            gen_task_repo.update(gen_task)
-
-    logger.info(
-        "剪辑计划渲染完成: plan_id=%s engine=%s rendered=%d failed=%d duration=%.1fs",
-        plan_id,
-        engine,
-        len(rendered_clip_ids),
-        len(failed_clip_ids),
-        duration,
-    )
-
-    return {
-        "status": "completed",
-        "plan_id": plan_id,
-        "rendered_count": len(rendered_clip_ids),
-        "failed_count": len(failed_clip_ids),
-        "output_url": output_url,
-        "duration": duration,
-    }
-
-
-def _render_with_unified(
-    plan,
-    clips,
-    plan_id: str,
-    generation_task_id: str,
-    plan_repo,
-    clip_repo,
-    gen_task_repo,
-    db,
-) -> dict:
-    """统一渲染引擎路径（通过 RenderAdapter 调用 UnifiedRenderService）。
-
-    RenderAdapter 内部处理：素材下载、BGM 准备、ASR 自动字幕、渲染执行、OSS 上传。
-    本函数只负责：业务状态更新、查重、收尾。
-    """
-    from video_processing.render_adapter import RenderAdapter
-
-    adapter = RenderAdapter(db)
-
-    # 进度回调：更新 GenerationTask 进度
-    def _progress_cb(progress: float, stage: str):
-        if not generation_task_id:
-            return
-        try:
-            gen_task = gen_task_repo.get(generation_task_id)
-            if gen_task:
-                # 映射到 30%~90% 区间（素材下载前已到 30%）
-                mapped_progress = 30.0 + progress * 0.6
-                gen_task.progress = min(mapped_progress, 95.0)
-                gen_task.append_log(
-                    stage="render_progress",
-                    message=stage,
-                    level="INFO",
-                    progress=mapped_progress,
-                )
-                gen_task_repo.update(gen_task)
-        except Exception:
-            pass
-
-    try:
-        result = adapter.render_plan(
-            plan_id=plan_id,
-            job_id=generation_task_id or plan_id,
-            progress_cb=_progress_cb,
-        )
-    except Exception as render_err:
-        logger.error("渲染失败(unified): %s — %s", plan_id, render_err)
-        _mark_plan_failed(plan_repo, plan_id, gen_task_repo, generation_task_id, f"渲染失败: {render_err}")
-        return {"status": "error", "message": f"渲染失败: {render_err}"}
-
-    if not result.success:
-        full_error = result.error_message or "渲染失败"
-        if result.error_detail:
-            full_error = f"{full_error}\n--- stderr ---\n{result.error_detail}"
-        logger.error("渲染失败(unified): %s — %s", plan_id, result.error_message)
-        _mark_plan_failed(plan_repo, plan_id, gen_task_repo, generation_task_id, full_error)
-        return {"status": "error", "message": result.error_message or "渲染失败"}
-
-    output_path = result.output_path or Path("")
-    output_url = result.output_url or ""
-    thumbnail_url = result.thumbnail_url or ""
-    # adapter 上传到 rendered/{plan_id}/{job_id}.mp4，从 URL 提取实际 key
-    # 不能用 output.mp4 硬编码，否则 cover 等下游通过 key 构造的 URL 指向不存在的文件
-    if output_url:
-        from packages.shared.storage import get_shared_storage_service
-
-        storage_key = get_shared_storage_service().normalize_storage_key(output_url)
-    else:
-        storage_key = f"rendered/{plan_id}/{generation_task_id or plan_id}.mp4"
-
-    # 用 adapter 返回的 clip 明细（以 adapter 的结果为准）
-    rendered_clip_ids = result.rendered_clip_ids or []
-    failed_clip_ids = result.failed_clip_ids or []
-
-    # 将封面候选帧写入 plan.config（供封面 API 直接使用，跳过 MediaKit 抽帧）
-    if result.cover_candidates:
-        plan_config = plan.config or {}
-        plan_config["cover_candidates"] = result.cover_candidates
-        plan.config = plan_config
-        logger.info(
-            "封面候选帧已写入 plan.config: plan_id=%s count=%d",
-            plan_id,
-            len(result.cover_candidates),
-        )
-
-    return _finalize_render_success(
-        plan=plan,
-        plan_repo=plan_repo,
-        clip_repo=clip_repo,
-        gen_task_repo=gen_task_repo,
-        db=db,
-        plan_id=plan_id,
-        output_url=output_url or "",
-        storage_key=storage_key,
-        duration=result.duration,
-        file_size=result.file_size,
-        width=result.width,
-        height=result.height,
-        rendered_clip_ids=rendered_clip_ids,
-        failed_clip_ids=failed_clip_ids,
-        generation_task_id=generation_task_id,
-        output_path=output_path,
-        engine="unified",
-        thumbnail_url=thumbnail_url,
-        cover_candidates=result.cover_candidates,
-    )
-
-
-@celery_app.task(
-    name="worker.render_edit_plan",
-    bind=True,
-    max_retries=2,
-    soft_time_limit=600,  # 10 分钟软超时
-    time_limit=660,  # 11 分钟硬超时
-)
-def render_edit_plan(self, plan_id: str) -> dict:  # pragma: no cover
-    """渲染剪辑计划
-
-    流程：
-    1. 加载 EditPlan + EditPlanClips
-    2. 通过 RenderAdapter 调用 UnifiedRenderService 渲染
-    3. 下载素材 + 渲染
-    4. 上传渲染结果到 OSS
-    5. 创建 GeneratedVideo 记录 + 查重
-    6. 更新 EditPlan → completed, EditPlanClips → rendered
-    7. 更新 GenerationTask 进度
-    """
-    logger.info("开始渲染剪辑计划: plan_id=%s", plan_id)
-
-    generation_task_id = ""
-
-    for repos in _get_repos():
-        plan_repo, clip_repo, gen_task_repo, db = repos
-
-        try:
-            # 1. 加载 EditPlan
-            plan = plan_repo.get(plan_id)
-            if plan is None:
-                logger.error("剪辑计划不存在: %s", plan_id)
-                return {"status": "error", "message": f"计划不存在: {plan_id}"}
-
-            # 获取 generation_task_id（提前读取，确保 except 块可用）
-            generation_task_id = plan.config.get("generation_task_id", "")
-
-            # 2. 准备渲染（使用 unified 渲染引擎）
-
-            # 3. 加载片段列表（按 order 排序）
-            clips = clip_repo.list_by_plan(plan_id, skip=0, limit=10000)
-            if not clips:
-                logger.warning("剪辑计划没有片段: %s", plan_id)
-                plan.mark_failed()
-                plan_repo.update(plan)
-                return {"status": "error", "message": "没有可渲染的片段"}
-
-            # 更新 GenerationTask 状态为 running
-            if generation_task_id:
-                gen_task = gen_task_repo.get(generation_task_id)
-                if gen_task:
-                    gen_task.status = "running"
-                    gen_task.started_at = datetime.now(timezone.utc)
-                    gen_task.append_log(
-                        stage="render_start",
-                        message=f"开始渲染，片段数 {len(clips)}",
-                        level="INFO",
-                        engine="unified",
-                        clip_count=len(clips),
-                    )
-                    gen_task_repo.update(gen_task)
-
-            # 3. 渲染前取消检查
-            if generation_task_id:
-                current_task = gen_task_repo.get(generation_task_id)
-                if current_task:
-                    task_status = (
-                        current_task.status.value if hasattr(current_task.status, "value") else str(current_task.status)
-                    )
-                    if task_status == "cancelled":
-                        logger.info("任务已被取消，中止渲染: plan_id=%s task_id=%s", plan_id, generation_task_id)
-
-                        if plan.status.value == "rendering":
-                            try:
-                                plan.resume_editing()
-                                plan_repo.update(plan)
-                            except ValueError:
-                                pass
-                        return {"status": "cancelled", "plan_id": plan_id, "message": "任务已取消"}
-
-            # 4. 渲染（unified 引擎：RenderAdapter 统一处理下载 + BGM + ASR + 渲染 + 上传）
-            result = _render_with_unified(
-                plan=plan,
-                clips=clips,
-                plan_id=plan_id,
-                generation_task_id=generation_task_id,
-                plan_repo=plan_repo,
-                clip_repo=clip_repo,
-                gen_task_repo=gen_task_repo,
-                db=db,
-            )
-
-            result["engine"] = "unified"
-            return result
-
-        except Exception as exc:
-            # 超时异常不重试，直接标记失败
-            from celery.exceptions import SoftTimeLimitExceeded
-
-            is_timeout = isinstance(exc, SoftTimeLimitExceeded)
-            if is_timeout:
-                logger.error("渲染剪辑计划超时: plan_id=%s", plan_id)
-            else:
-                logger.exception("渲染剪辑计划异常: %s", plan_id)
-
-            # 尝试标记计划和 GenerationTask 为失败
-            error_msg = "渲染任务超时（超过10分钟）" if is_timeout else f"渲染异常: {type(exc).__name__}: {exc}"
-            try:
-                plan = plan_repo.get(plan_id)
-                if plan and plan.status.value == "rendering":
-                    plan.mark_failed()
-                    plan_repo.update(plan)
-            except Exception as e:
-                logger.warning("标记计划失败时异常: plan_id=%s error=%s", plan_id, e, exc_info=True)
-            # 更新 GenerationTask 状态为 failed，前端轮询能看到失败状态
-            try:
-                if generation_task_id:
-                    gen_task = gen_task_repo.get(generation_task_id)
-                    if gen_task and gen_task.status.value != "failed":
-                        gen_task.status = "failed"
-                        gen_task.error_message = error_msg
-                        gen_task.completed_at = datetime.now(timezone.utc)
-                        try:
-                            log_stage = "render_timeout" if is_timeout else "render_failed"
-                            gen_task.append_log(
-                                stage=log_stage,
-                                message=error_msg[:500],
-                                level="ERROR",
-                                exception_type=type(exc).__name__,
-                            )
-                        except Exception:
-                            pass
-                        gen_task_repo.update(gen_task)
-                        logger.info(
-                            "GenerationTask 已标记为 failed: task_id=%s plan_id=%s",
-                            generation_task_id,
-                            plan_id,
-                        )
-            except Exception as e:
-                logger.warning(
-                    "更新 GenerationTask 失败状态时异常: task_id=%s error=%s", generation_task_id, e, exc_info=True
-                )
-            raise self.retry(exc=exc, countdown=60) from exc
-
-    return {"status": "error", "message": "数据库连接失败"}

infra/docker/api-base.Dockerfile

@@ -17,6 +17,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libpq-dev \
     libpq5 \
     ffmpeg \
+    fonts-noto-cjk \
+    fontconfig \
     && rm -rf /var/lib/apt/lists/*
 
 # 创建虚拟环境

infra/docker/entrypoint-worker.sh

@@ -6,8 +6,13 @@ set -e
 
 CONCURRENCY="${WORKER_CONCURRENCY:-2}"
 
+# ⚠️ 部署约束：此 Worker 必须且只能运行单实例（replicas=1）
+# -B 标志嵌入 celery beat，beat 负责定期触发 pending 超时清理等定时任务
+# 多实例部署会导致每个 Worker 独立运行 Beat，造成定时任务重复执行
+# 若需横向扩展 Worker，必须将 Beat 拆分为独立服务（celery beat -A worker_app.celery_app）
 exec celery \
   -A worker_app.celery_app \
   worker \
   --loglevel=info \
+  "-B" \
   "--concurrency=${CONCURRENCY}"

packages/adapters/sqlalchemy_impl/generation_task_repository.py

@@ -41,7 +41,7 @@ def _to_domain(model: GenerationTaskModel) -> GenerationTask:
         output_width=getattr(model, "output_width", 1280) or 1280,
         output_height=getattr(model, "output_height", 720) or 720,
         cover_url=getattr(model, "cover_url", "") or "",
-        custom_title=getattr(model, "custom_title", "") or "",
+        title_config=dict(getattr(model, "title_config", {}) or {}),
         logs=model.logs or "[]",
         created_at=model.created_at,
         updated_at=model.updated_at,
@@ -85,7 +85,7 @@ class SQLAlchemyGenerationTaskRepository:
             output_width=task.output_width,
             output_height=task.output_height,
             cover_url=task.cover_url or "",
-            custom_title=task.custom_title or "",
+            title_config=dict(task.title_config) if task.title_config else {},
             logs=task.logs,
             created_at=task.created_at,
             updated_at=task.updated_at,
@@ -272,7 +272,7 @@ class SQLAlchemyGenerationTaskRepository:
         model.output_width = task.output_width
         model.output_height = task.output_height
         model.cover_url = task.cover_url or ""
-        model.custom_title = task.custom_title or ""
+        model.title_config = dict(task.title_config) if task.title_config else {}
         model.logs = task.logs
         self.session.commit()
         return task
@@ -310,3 +310,42 @@ class SQLAlchemyGenerationTaskRepository:
             model.completed_at = datetime.now(timezone.utc)
         self.session.commit()
         return len(models)
+
+    def cleanup_stale_pending(self, timeout_minutes: int = 30) -> int:
+        """清理超时的 pending 任务（未被 Worker 拉取的任务）。
+
+        全局任务队列有 pending 数量上限，长期卡在 pending 的任务会占满队列，
+        导致新用户无法创建任务。将超时的 pending 任务标记为 failed。
+
+        Args:
+            timeout_minutes: 超时时间（分钟），默认 30 分钟
+
+        Returns:
+            清理的任务数量
+        """
+        from datetime import timedelta
+
+        cutoff = datetime.now(timezone.utc) - timedelta(minutes=timeout_minutes)
+        error_info = {
+            "error_type": "PendingTimeout",
+            "message": f"任务在 pending 状态停留超过 {timeout_minutes} 分钟，自动清理",
+            "failed_at": datetime.now(timezone.utc).isoformat(),
+        }
+        count = (
+            self.session.query(GenerationTaskModel)
+            .filter(
+                GenerationTaskModel.status == GenerationTaskStatus.PENDING.value,
+                GenerationTaskModel.created_at < cutoff,
+            )
+            .update(
+                {
+                    GenerationTaskModel.status: GenerationTaskStatus.FAILED.value,
+                    GenerationTaskModel.error_message: "pending timeout: auto cleanup",
+                    GenerationTaskModel.error_info: error_info,
+                    GenerationTaskModel.completed_at: datetime.now(timezone.utc),
+                },
+                synchronize_session=False,
+            )
+        )
+        self.session.commit()
+        return count

packages/adapters/sqlalchemy_impl/models.py

@@ -298,6 +298,7 @@ class GenerationTaskModel(Base):
     output_height = Column(Integer, nullable=False, default=720)
     cover_url = Column(String(1000), nullable=False, default="")
     custom_title = Column(String(500), nullable=False, default="")
+    title_config = Column(JSON, nullable=False, default=dict)
     bgm_config = Column(JSON, nullable=False, default=dict)
     extra_meta = Column("metadata", JSON, nullable=False, default=dict)
     logs = Column(Text, nullable=False, default="[]", server_default="[]")

packages/application/generation_tasks.py

@@ -31,7 +31,6 @@ class CreateGenerationTaskCommand:
     output_width: int = 1280
     output_height: int = 720
     cover_url: str = ""
-    custom_title: str = ""
     title_config: dict = field(default_factory=dict)
 
 
@@ -68,7 +67,7 @@ class CreateGenerationTaskUseCase:
             output_width=command.output_width,
             output_height=command.output_height,
             cover_url=command.cover_url,
-            custom_title=command.custom_title,
+            title_config=command.title_config,
         )
         return self.generation_task_repository.create(task)
 

packages/domain/generation_task.py

@@ -120,7 +120,7 @@ class GenerationTask:
     output_width: int = 1280
     output_height: int = 720
     cover_url: str = ""
-    custom_title: str = ""
+    title_config: dict = field(default_factory=dict)
     extra_meta: dict = field(default_factory=dict)
     logs: str = "[]"
     created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
@@ -152,7 +152,7 @@ class GenerationTask:
         output_width: int = 1280,
         output_height: int = 720,
         cover_url: str = "",
-        custom_title: str = "",
+        title_config: dict | None = None,
         extra_meta: dict | None = None,
     ) -> "GenerationTask":
         if not project_id.strip() and not template_id.strip():
@@ -183,7 +183,7 @@ class GenerationTask:
             output_width=output_width,
             output_height=output_height,
             cover_url=cover_url,
-            custom_title=custom_title,
+            title_config=dict(title_config) if title_config else {},
             extra_meta=dict(extra_meta) if extra_meta else {},
         )
 
@@ -303,10 +303,10 @@ class GenerationTask:
         self,
         *,
         cover_url: str = "",
-        custom_title: str = "",
         extra_meta: dict | None = None,
         output_width: int = 0,
         output_height: int = 0,
+        title_config: dict | None = None,
     ) -> None:
         """将预览任务确认为正式产出。
 
@@ -316,12 +316,12 @@ class GenerationTask:
         self.is_preview = False
         if cover_url:
             self.cover_url = cover_url
-        if custom_title:
-            self.custom_title = custom_title
         if output_width > 0:
             self.output_width = output_width
         if output_height > 0:
             self.output_height = output_height
+        if title_config:
+            self.title_config = dict(title_config)
         if extra_meta:
             self.extra_meta.update(extra_meta)
         self.updated_at = datetime.now(timezone.utc)

packages/shared/mediakit_client.py

@@ -364,7 +364,7 @@ class MediaKitClient:
                 data = response.json()
 
                 status = data.get("status")
-                if status == "success":
+                if status in ("completed", "success"):
                     result = data.get("result", {})
                     snapshots = result.get("snapshots", [])
                     logger.info(

packages/shared/title_overlay.py

@@ -0,0 +1,171 @@
+"""封面标题文字叠加（Pillow）— API / Worker 共用。
+
+在封面帧上绘制白色标题文字 + 黑色描边/阴影，支持 CJK 字体和自动换行。
+从已渲染视频抽帧时通常不需要调用（标题已烧录）；
+从源素材抽帧（API E2 兜底）时调用，保证封面带标题。
+"""
+
+from __future__ import annotations
+
+import logging
+from pathlib import Path
+from typing import Optional
+
+logger = logging.getLogger(__name__)
+
+# 按优先级查找 CJK 字体（Debian/Ubuntu fonts-noto-cjk 安装路径）
+_FONT_CANDIDATES = (
+    "/usr/share/fonts/opentype/noto/NotoSansCJK-Bold.ttc",
+    "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
+    "/usr/share/fonts/truetype/noto/NotoSansCJK-Bold.ttc",
+    "/usr/share/fonts/truetype/noto/NotoSansCJK-Regular.ttc",
+    "/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc",
+)
+
+
+def find_title_font(size: int):
+    """查找可用的 CJK 字体并返回 PIL ImageFont，找不到返回 None。"""
+    try:
+        from PIL import ImageFont
+    except ImportError:
+        return None
+
+    for fp in _FONT_CANDIDATES:
+        if Path(fp).exists():
+            try:
+                return ImageFont.truetype(fp, size=size)
+            except Exception:
+                continue
+    logger.warning("未找到 CJK 字体，标题叠加将使用 PIL 默认字体（中文可能显示为方块）")
+    return ImageFont.load_default()
+
+
+def _parse_hex_color(color: str, fallback=(255, 255, 255)) -> tuple[int, int, int]:
+    "将 #RRGGBB / #RGB 解析为 RGB 元组，失败返回 fallback。"
+    if not color or not isinstance(color, str):
+        return fallback
+    c = color.strip().lstrip("#")
+    try:
+        if len(c) == 6:
+            return (int(c[0:2], 16), int(c[2:4], 16), int(c[4:6], 16))
+        if len(c) == 3:
+            return (int(c[0] * 2, 16), int(c[1] * 2, 16), int(c[2] * 2, 16))
+    except (ValueError, IndexError):
+        pass
+    return fallback
+
+
+def wrap_title_text(text: str, font, max_width: int) -> list[str]:
+    """按像素宽度对中英文混合文本自动换行，支持显式 \\n。"""
+    lines: list[str] = []
+    current = ""
+    for ch in text:
+        if ch == "\n":
+            if current:
+                lines.append(current)
+            current = ""
+            continue
+        trial = current + ch
+        try:
+            bbox = font.getbbox(trial)
+            width = bbox[2] - bbox[0]
+        except Exception:
+            width = len(trial) * (font.size // 2)
+        if width <= max_width:
+            current = trial
+        else:
+            if current:
+                lines.append(current)
+            current = ch
+    if current:
+        lines.append(current)
+    return lines
+
+
+def apply_title_to_image(
+    image_path: str,
+    title_text: str,
+    *,
+    color: str = "#ffffff",
+    position: str = "bottom",
+    font_size: Optional[int] = None,
+    margin_ratio: float = 0.06,
+    stroke_width_ratio: float = 0.04,
+) -> Optional[str]:
+    """在图片上绘制标题文字并覆盖保存。
+
+    Args:
+        image_path: 图片路径（处理结果覆盖写回）
+        title_text: 标题文字；为空直接返回 None 表示跳过
+        color: 字体颜色（#RRGGBB），默认白色
+        position: top / center / bottom
+        font_size: 字号，None 时按图片宽度自动计算
+        margin_ratio: 边缘留白占短边比例
+        stroke_width_ratio: 描边宽度占字号比例
+
+    Returns:
+        成功返回 image_path；标题为空或 PIL 不可用返回 None。
+    """
+    if not title_text or not title_text.strip():
+        return None
+
+    try:
+        from PIL import Image, ImageDraw
+    except ImportError:
+        logger.warning("Pillow 未安装，跳过标题叠加: image=%s", image_path)
+        return None
+
+    img = Image.open(image_path).convert("RGB")
+    draw = ImageDraw.Draw(img)
+    img_w, img_h = img.size
+
+    if font_size is None:
+        font_size = max(28, min(72, img_w // 16))
+
+    font = find_title_font(font_size)
+    if font is None:
+        return None
+
+    text_rgb = _parse_hex_color(color)
+    stroke_width = max(2, int(font_size * stroke_width_ratio))
+    margin = int(min(img_w, img_h) * margin_ratio)
+    max_text_width = img_w - 2 * margin
+
+    lines = wrap_title_text(title_text.strip(), font, max_text_width)
+    if not lines:
+        return None
+
+    line_heights = []
+    for ln in lines:
+        bbox = font.getbbox(ln)
+        line_heights.append(bbox[3] - bbox[1])
+    line_height = max(line_heights) if line_heights else font_size
+    line_gap = int(line_height * 0.3)
+    total_height = len(lines) * line_height + (len(lines) - 1) * line_gap
+
+    if position == "top":
+        y_start = margin
+    elif position == "center":
+        y_start = (img_h - total_height) // 2
+    else:
+        y_start = img_h - total_height - margin
+
+    for i, ln in enumerate(lines):
+        bbox = font.getbbox(ln)
+        line_w = bbox[2] - bbox[0]
+        x = (img_w - line_w) // 2
+        y = y_start + i * (line_height + line_gap)
+        # 阴影
+        draw.text((x + 2, y + 2), ln, font=font, fill=(0, 0, 0))
+        # 文字（颜色由 color 参数控制）+ 黑色描边
+        draw.text(
+            (x, y),
+            ln,
+            font=font,
+            fill=text_rgb,
+            stroke_width=stroke_width,
+            stroke_fill=(0, 0, 0),
+        )
+
+    img.save(image_path, "JPEG", quality=92)
+    return image_path

requirements-base.txt

@@ -29,3 +29,4 @@ httpx==0.27.2
 
 # Prometheus monitoring
 prometheus-client==0.21.1
+Pillow==10.4.0

tests/integration/test_four_mode_rendering.py

@@ -1,234 +0,0 @@
-"""剪辑模式渲染集成测试.
-
-验证剪辑模式（ONE_TAKE / VOICE_OVER）通过
-_build_plan_and_clips_from_task + UnifiedRenderService 的完整渲染流程。
-注：PIP / VOICE_PIP 已下线，统一映射为 ONE_TAKE。
-
-需要 ffmpeg 可用；CI 无 ffmpeg 时自动跳过。
-"""
-
-from __future__ import annotations
-
-import shutil
-import subprocess
-import tempfile
-from pathlib import Path
-
-import pytest
-from video_processing.unified_render_service import (
-    RenderResult,
-    UnifiedRenderService,
-    _resolve_layer_role,
-)
-from worker_app.tasks.generation import _build_plan_and_clips_from_task
-
-pytestmark = pytest.mark.skipif(
-    not shutil.which("ffmpeg"),
-    reason="ffmpeg not available",
-)
-
-
-# ── 辅助函数 ──────────────────────────────────────────────────────────────────
-
-
-def _generate_test_video(path: Path, duration: float = 3.0, color: str = "red") -> None:
-    """生成一个纯色测试视频。"""
-    cmd = [
-        "ffmpeg",
-        "-y",
-        "-f",
-        "lavfi",
-        "-i",
-        f"color=c={color}:s=640x360:d={duration}:r=25",
-        "-c:v",
-        "libx264",
-        "-pix_fmt",
-        "yuv420p",
-        "-movflags",
-        "+faststart",
-        str(path),
-    ]
-    subprocess.run(cmd, check=True, capture_output=True, timeout=30)
-
-
-def _render_with_mode(
-    mode: str,
-    num_clips: int = 3,
-    duration: float = 2.0,
-) -> tuple[RenderResult, Path]:
-    """用指定模式生成测试视频并渲染，返回 (result, work_dir)。
-
-    调用方负责清理 work_dir。
-    """
-    work_dir = Path(tempfile.mkdtemp(prefix="test_4mode_"))
-
-    # 生成测试视频素材
-    colors = ["red", "green", "blue", "yellow", "purple"]
-    downloaded_paths: list[Path] = []
-    for i in range(num_clips):
-        p = work_dir / f"test_{i:03d}.mp4"
-        _generate_test_video(p, duration=duration, color=colors[i % len(colors)])
-        downloaded_paths.append(p)
-
-    # 构建虚拟 plan + clips
-    task_id = f"test_task_{mode}"
-    plan, clips, asset_path_map = _build_plan_and_clips_from_task(
-        task_id=task_id,
-        downloaded_paths=downloaded_paths,
-        mode=mode,
-    )
-
-    # 渲染
-    service = UnifiedRenderService(
-        plan=plan,
-        clips=clips,
-        asset_path_map=asset_path_map,
-        work_dir=work_dir,
-        output_width=640,
-        output_height=360,
-        output_fps=25,
-    )
-    result = service.render()
-    return result, work_dir
-
-
-# ── 测试 _build_plan_and_clips_from_task ──────────────────────────────────────
-
-
-class TestBuildPlanAndClips:
-    """测试 4 种模式的虚拟 plan 构建。"""
-
-    def _make_paths(self, n: int) -> list[Path]:
-        return [Path(f"/tmp/test_{i}.mp4") for i in range(n)]
-
-    def test_one_take_mode(self):
-        paths = self._make_paths(3)
-        plan, clips, asset_map = _build_plan_and_clips_from_task("t1", paths, "one_take")
-
-        assert plan.id == "t1"
-        assert len(clips) == 3
-        assert all(c.clip_type == "main" for c in clips)
-        assert len(asset_map) == 3
-
-    def test_pip_mode_maps_to_one_take(self):
-        """PIP 已下线，映射为 one_take → 全部 main clips。"""
-        paths = self._make_paths(3)
-        plan, clips, asset_map = _build_plan_and_clips_from_task("t2", paths, "pip")
-
-        assert len(clips) == 3
-        assert all(c.clip_type == "main" for c in clips)
-
-    def test_voice_over_mode(self):
-        paths = self._make_paths(3)
-        plan, clips, asset_map = _build_plan_and_clips_from_task("t3", paths, "voice_over")
-
-        assert len(clips) == 3
-        assert all(c.clip_type == "main" for c in clips)
-        assert all(c.config.get("role") == "b_roll" for c in clips)
-
-    def test_voice_pip_mode_maps_to_one_take(self):
-        """VOICE_PIP 已下线，映射为 one_take → 全部 main clips。"""
-        paths = self._make_paths(4)
-        plan, clips, asset_map = _build_plan_and_clips_from_task("t4", paths, "voice_pip")
-
-        assert len(clips) == 4
-        assert all(c.clip_type == "main" for c in clips)
-
-    def test_unknown_mode_defaults_to_one_take(self):
-        paths = self._make_paths(2)
-        plan, clips, asset_map = _build_plan_and_clips_from_task("t5", paths, "unknown_mode")
-
-        assert len(clips) == 2
-        assert all(c.clip_type == "main" for c in clips)
-
-    def test_asset_path_map_keys_match_clip_asset_ids(self):
-        paths = self._make_paths(3)
-        _, clips, asset_map = _build_plan_and_clips_from_task("t6", paths, "one_take")
-
-        clip_asset_ids = {c.asset_id for c in clips}
-        map_keys = set(asset_map.keys())
-        assert clip_asset_ids == map_keys
-
-
-# ── 测试图层分组（4 模式） ────────────────────────────────────────────────────
-
-
-class TestFourModeLayerGrouping:
-    """验证 4 种模式的 clip_type 分布经 _resolve_layer_role 后产生正确的图层。"""
-
-    def test_one_take_layers(self):
-        """ONE_TAKE: 3 main → 1 main layer。"""
-        paths = [Path(f"/tmp/ot_{i}.mp4") for i in range(3)]
-        _, clips, _ = _build_plan_and_clips_from_task("ot", paths, "one_take")
-
-        roles = {_resolve_layer_role(c.clip_type, c.config) for c in clips}
-        assert roles == {"main"}
-
-    def test_pip_layers_now_one_take(self):
-        """PIP 已下线 → one_take: 3 main → 1 main layer。"""
-        paths = [Path(f"/tmp/pip_{i}.mp4") for i in range(3)]
-        _, clips, _ = _build_plan_and_clips_from_task("pip", paths, "pip")
-
-        roles = {_resolve_layer_role(c.clip_type, c.config) for c in clips}
-        assert roles == {"main"}
-
-    def test_voice_over_layers(self):
-        """VOICE_OVER: 3 main(b_roll) → broll。"""
-        paths = [Path(f"/tmp/vo_{i}.mp4") for i in range(3)]
-        _, clips, _ = _build_plan_and_clips_from_task("vo", paths, "voice_over")
-
-        roles = {_resolve_layer_role(c.clip_type, c.config) for c in clips}
-        assert roles == {"broll"}
-
-    def test_voice_pip_layers_now_one_take(self):
-        """VOICE_PIP 已下线 → one_take: 4 main → main layer。"""
-        paths = [Path(f"/tmp/vpip_{i}.mp4") for i in range(4)]
-        _, clips, _ = _build_plan_and_clips_from_task("vpip", paths, "voice_pip")
-
-        roles = {_resolve_layer_role(c.clip_type, c.config) for c in clips}
-        assert roles == {"main"}
-
-
-# ── 端到端渲染测试（需要 ffmpeg） ─────────────────────────────────────────────
-
-
-class TestEndToEndRendering:
-    """4 种模式的完整渲染测试，验证输出文件存在且时长合理。"""
-
-    def test_one_take_render(self):
-        result, work_dir = _render_with_mode("one_take", num_clips=2, duration=2.0)
-        try:
-            assert result.output_path.exists()
-            assert result.file_size > 0
-            assert result.duration > 0
-            assert result.width == 640
-            assert result.height == 360
-        finally:
-            shutil.rmtree(work_dir, ignore_errors=True)
-
-    def test_pip_render(self):
-        result, work_dir = _render_with_mode("pip", num_clips=2, duration=2.0)
-        try:
-            assert result.output_path.exists()
-            assert result.file_size > 0
-            assert result.duration > 0
-        finally:
-            shutil.rmtree(work_dir, ignore_errors=True)
-
-    def test_voice_over_render(self):
-        result, work_dir = _render_with_mode("voice_over", num_clips=2, duration=2.0)
-        try:
-            assert result.output_path.exists()
-            assert result.file_size > 0
-            assert result.duration > 0
-        finally:
-            shutil.rmtree(work_dir, ignore_errors=True)
-
-    def test_voice_pip_render(self):
-        result, work_dir = _render_with_mode("voice_pip", num_clips=3, duration=2.0)
-        try:
-            assert result.output_path.exists()
-            assert result.file_size > 0
-            assert result.duration > 0
-        finally:
-            shutil.rmtree(work_dir, ignore_errors=True)

tests/integration/test_full_pipeline.py

@@ -1,189 +0,0 @@
-"""全链路集成测试.
-
-验证 PlanGeneratorService → UnifiedRenderService → 查重 的端到端流程。
-"""
-
-from __future__ import annotations
-
-import shutil
-import subprocess
-import tempfile
-from pathlib import Path
-
-import pytest
-from video_processing.unified_render_service import (
-    UnifiedRenderService,
-)
-from worker_app.tasks.generation import _build_plan_and_clips_from_task
-
-pytestmark = pytest.mark.skipif(
-    not shutil.which("ffmpeg"),
-    reason="ffmpeg not available",
-)
-
-
-def _generate_test_video(path: Path, duration: float = 3.0) -> None:
-    """生成一个测试视频。"""
-    cmd = [
-        "ffmpeg",
-        "-y",
-        "-f",
-        "lavfi",
-        "-i",
-        f"color=c=blue:s=640x360:d={duration}:r=25",
-        "-c:v",
-        "libx264",
-        "-pix_fmt",
-        "yuv420p",
-        str(path),
-    ]
-    subprocess.run(cmd, check=True, capture_output=True, timeout=30)
-
-
-def _generate_test_audio(path: Path, duration: float = 5.0) -> None:
-    """生成一个测试音频文件。"""
-    cmd = [
-        "ffmpeg",
-        "-y",
-        "-f",
-        "lavfi",
-        "-i",
-        f"sine=frequency=440:duration={duration}",
-        "-c:a",
-        "aac",
-        "-b:a",
-        "128k",
-        str(path),
-    ]
-    subprocess.run(cmd, check=True, capture_output=True, timeout=30)
-
-
-class TestFullPipeline:
-    """验证从虚拟 plan 构建到渲染输出的完整流程。"""
-
-    def test_one_take_pipeline(self):
-        """ONE_TAKE 模式完整流程。"""
-        with tempfile.TemporaryDirectory() as tmpdir:
-            work_dir = Path(tmpdir)
-
-            # 生成测试素材
-            paths = []
-            for i in range(3):
-                p = work_dir / f"clip_{i}.mp4"
-                _generate_test_video(p, duration=2.0)
-                paths.append(p)
-
-            # 构建虚拟 plan
-            plan, clips, asset_map = _build_plan_and_clips_from_task("pipeline_test", paths, "one_take")
-
-            # 渲染
-            service = UnifiedRenderService(
-                plan=plan,
-                clips=clips,
-                asset_path_map=asset_map,
-                work_dir=work_dir,
-                output_width=640,
-                output_height=360,
-            )
-            result = service.render()
-
-            assert result.output_path.exists()
-            assert result.duration > 0
-            assert result.file_size > 0
-            assert result.width == 640
-            assert result.height == 360
-
-    def test_pipeline_with_audio_mux(self):
-        """渲染 + 混音后处理。"""
-        with tempfile.TemporaryDirectory() as tmpdir:
-            work_dir = Path(tmpdir)
-
-            # 生成测试素材
-            video_path = work_dir / "clip_0.mp4"
-            _generate_test_video(video_path, duration=3.0)
-
-            # 构建虚拟 plan
-            plan, clips, asset_map = _build_plan_and_clips_from_task("audio_test", [video_path], "one_take")
-
-            # 渲染
-            service = UnifiedRenderService(
-                plan=plan,
-                clips=clips,
-                asset_path_map=asset_map,
-                work_dir=work_dir,
-                output_width=640,
-                output_height=360,
-            )
-            render_result = service.render()
-
-            # 混音 - 直接用 ffmpeg（_mux_audio_track 已被清理）
-            audio_path = work_dir / "voice.aac"
-            _generate_test_audio(audio_path, duration=5.0)
-
-            final_path = work_dir / "final.mp4"
-            mux_cmd = [
-                "ffmpeg",
-                "-y",
-                "-i",
-                str(render_result.output_path),
-                "-i",
-                str(audio_path),
-                "-c:v",
-                "copy",
-                "-c:a",
-                "aac",
-                "-shortest",
-                str(final_path),
-            ]
-            subprocess.run(mux_cmd, check=True, capture_output=True, timeout=30)
-
-            assert final_path.exists()
-            assert final_path.stat().st_size > 0
-
-    def test_single_clip_pipeline(self):
-        """单 clip 渲染（无转场）。"""
-        with tempfile.TemporaryDirectory() as tmpdir:
-            work_dir = Path(tmpdir)
-
-            video_path = work_dir / "single.mp4"
-            _generate_test_video(video_path, duration=5.0)
-
-            plan, clips, asset_map = _build_plan_and_clips_from_task("single_test", [video_path], "one_take")
-
-            service = UnifiedRenderService(
-                plan=plan,
-                clips=clips,
-                asset_path_map=asset_map,
-                work_dir=work_dir,
-                output_width=640,
-                output_height=360,
-            )
-            result = service.render()
-
-            assert result.output_path.exists()
-            assert result.duration > 0
-
-    def test_dedup_helper_integration(self):
-        """验证 dedup_helpers.create_video_record_and_dedup 的导入和签名。"""
-        # 只验证函数存在且签名正确（不实际调用，需要数据库）
-        import inspect
-
-        from video_processing.dedup_helpers import create_video_record_and_dedup
-
-        sig = inspect.signature(create_video_record_and_dedup)
-        params = set(sig.parameters.keys())
-        expected = {
-            "generation_task_id",
-            "project_id",
-            "batch_id",
-            "file_url",
-            "file_size",
-            "duration",
-            "video_path",
-            "mode",
-            "session",
-            "width",
-            "height",
-            "fps",
-        }
-        assert expected.issubset(params), f"Missing params: {expected - params}"

tests/unit/test_1280_preview_speedup.py

@@ -149,14 +149,6 @@ class TestWorkerGenerationNoPreviewOverride:
         assert 'resolution = "854x480"' not in source, "Should not override resolution to 480p in preview mode"
         assert 'bitrate = "1M"' not in source, "Should not override bitrate to 1M in preview mode"
 
-    def test_parallel_download_still_works(self):
-        """并行下载逻辑保留。"""
-        with open("apps/worker/worker_app/tasks/generation.py") as f:
-            source = f.read()
-
-        assert "ThreadPoolExecutor" in source, "Should use ThreadPoolExecutor for parallel downloads"
-        assert "as_completed" in source, "Should use as_completed for result collection"
-
 
 # ── 5. generation_preview.py 不再有 PREVIEW_RESOLUTION ──