feat(phase2): 模板编辑器子路由迁移第二批（AI/字幕/调整/封面/批量/分割合并）

- 新增22个端点：AI推荐、封面生成、字幕CRUD(5)、片段调整(5)、封面管理(4)、片段批量(3)、片段详情、分割、合并
- 全部复用 EditPlanService，零业务逻辑复制
- 模板编辑器总端点达到45个

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

@@ -26,11 +26,39 @@ import logging
 from typing import Any, List, Optional
 
 from app.api.routes.edit_plans import (
+    AIRecommendRequest,
+    AIRecommendResponse,
     BGMConfigUpdateRequest,
     ClipStatusItem,
     EditPlanGenerateResponse,
     EditPlanGenerationsResponse,
     EditPlanGenerationStatusResponse,
+    GenerateCoverRequest,
+    GenerateCoverResponse,
+)
+from app.api.routes.edit_plans_adjustments import (
+    BatchSpeedRequest,
+    BatchSpeedResponse,
+    ClipAdjustmentsRequest,
+    ClipAdjustResponse,
+    SpeedAdjustRequest,
+    TrimAdjustRequest,
+    VolumeAdjustRequest,
+)
+from app.api.routes.edit_plans_clips_batch import (
+    ClipBatchDeleteRequest,
+    ClipBatchDeleteResponse,
+    ClipReorderRequest,
+    ClipReorderResponse,
+    ClipsFromAssetsRequest,
+    ClipsFromAssetsResponse,
+)
+from app.api.routes.edit_plans_cover import (
+    CoverConfigResponse,
+    CoverExtractRequest,
+    CoverGenerateResponse,
+    CoverSmartRequest,
+    CoverUpdateRequest,
 )
 from app.api.routes.edit_plans_export import (
     ExportConfigResponse,
@@ -400,6 +428,119 @@ def delete_draft_clip(
     return None
 
 
+@router.get("/clips/{clip_id}", response_model=EditorClipResponse)
+def get_draft_clip_detail(
+    template_id: str,
+    clip_id: str,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+):
+    """获取草稿中的片段详情"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if clip is None:
+        raise HTTPException(status_code=404, detail="片段不存在")
+    if clip.plan_id != plan_id:
+        raise HTTPException(status_code=404, detail="片段不存在")
+    return EditorClipResponse(
+        id=clip.id,
+        plan_id=clip.plan_id,
+        clip_type=clip.clip_type.value if hasattr(clip.clip_type, "value") else str(clip.clip_type),
+        order=clip.order,
+        duration=clip.duration,
+        text_content=clip.text_content or "",
+        transition_effect=(
+            clip.transition_effect.value if hasattr(clip.transition_effect, "value") else str(clip.transition_effect)
+        ),
+        playback_speed=clip.playback_speed or 1.0,
+        config=clip.config or {},
+    )
+
+
+# ── 片段分割与合并 ──────────────────────────────────────────────────────────
+
+
+class SplitClipRequest(BaseModel):
+    """分割片段请求体"""
+
+    split_time: float = Field(..., gt=0, description="分割点（秒，相对于片段起始）")
+
+
+class MergeClipsRequest(BaseModel):
+    """合并片段请求体"""
+
+    clip_ids: list[str] = Field(..., min_length=2, description="要合并的片段 ID 列表")
+
+
+@router.post("/clips/{clip_id}/split", response_model=dict[str, Any], status_code=status.HTTP_200_OK)
+def split_draft_clip(
+    template_id: str,
+    clip_id: str,
+    body: SplitClipRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+):
+    """将一个片段从指定时间点分割为两个片段"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if clip is None or clip.plan_id != plan_id:
+        raise HTTPException(status_code=404, detail="片段不存在")
+    try:
+        result = plan_svc.split_clip(clip_id, body.split_time)
+    except ValueError as exc:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc
+    left = result["left_clip"]
+    right = result["right_clip"]
+    return {
+        "left_clip": {
+            "id": left.id,
+            "plan_id": left.plan_id,
+            "clip_type": left.clip_type,
+            "order": left.order,
+            "duration": left.duration,
+            "start_time": left.start_time,
+        },
+        "right_clip": {
+            "id": right.id,
+            "plan_id": right.plan_id,
+            "clip_type": right.clip_type,
+            "order": right.order,
+            "duration": right.duration,
+            "start_time": right.start_time,
+        },
+    }
+
+
+@router.post("/clips/merge", response_model=dict[str, Any], status_code=status.HTTP_200_OK)
+def merge_draft_clips(
+    template_id: str,
+    body: MergeClipsRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+):
+    """将多个连续的同类型片段合并为一个片段"""
+    _, plan_svc = services
+    for cid in body.clip_ids:
+        clip = plan_svc.get_clip(cid)
+        if clip is None or clip.plan_id != plan_id:
+            raise HTTPException(status_code=404, detail=f"片段不存在: {cid}")
+    try:
+        merged = plan_svc.merge_clips(body.clip_ids)
+    except ValueError as exc:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc
+    return {
+        "id": merged.id,
+        "plan_id": merged.plan_id,
+        "clip_type": merged.clip_type,
+        "order": merged.order,
+        "duration": merged.duration,
+        "text_content": merged.text_content,
+    }
+
+
 # ── BGM 模块 ────────────────────────────────────────────────────────────────────
 
 
@@ -1186,3 +1327,679 @@ def update_editor_export(
         format=current_export.get("format", "mp4"),
         preset_id=current_export.get("preset_id", ""),
     )
+
+
+# ── AI 推荐 & 封面生成 ────────────────────────────────────────────────────────
+
+
+@router.post("/ai-recommend", response_model=AIRecommendResponse)
+def editor_ai_recommend(
+    template_id: str,
+    body: AIRecommendRequest,
+    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),
+) -> AIRecommendResponse:
+    """AI 推荐片段方案"""
+    _, plan_svc = services
+    plan = plan_svc.get_plan_or_raise(plan_id)
+
+    plan_status = plan.status.value if hasattr(plan.status, "value") else plan.status
+    if plan_status not in ("draft", "editing"):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="当前草稿状态不支持AI推荐，请先编辑后再试",
+        )
+
+    from apps.worker.worker_app.tasks.ai_tasks import run_ai_recommend
+
+    result = run_ai_recommend(
+        plan_id=plan_id,
+        template_id=plan.template_id,
+        asset_ids=body.asset_ids,
+        editing_mode=body.editing_mode,
+        target_duration=body.target_duration,
+    )
+
+    try:
+        plan_svc.delete_all_clips(plan_id)
+
+        for clip_data in result["clips"]:
+            plan_svc.create_clip(
+                plan_id=plan_id,
+                clip_type=clip_data["clip_type"],
+                order=clip_data["order"],
+                text_content=clip_data.get("text_content", ""),
+                duration=clip_data["duration"],
+                transition_effect=clip_data.get("transition_effect", "cut"),
+                asset_id=clip_data.get("asset_id", ""),
+                start_time=clip_data.get("start_time", 0.0),
+                config=clip_data.get("config", {}),
+            )
+
+        normalized_config = normalize_plan_config(result.get("config", {}))
+        plan_svc.update_plan(
+            plan_id,
+            config=normalized_config,
+            total_duration=result["total_duration"],
+        )
+    except Exception as _e:
+        logger.exception("模板编辑器AI推荐写入失败: template_id=%s plan_id=%s", template_id, plan_id)
+        try:
+            db.rollback()
+        except Exception:
+            pass
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail="AI推荐结果保存失败，请稍后重试",
+        ) from _e
+
+    logger.info(
+        "模板编辑器AI推荐: template_id=%s plan_id=%s clips=%d duration=%.1f by user=%s",
+        template_id,
+        plan_id,
+        len(result["clips"]),
+        result["total_duration"],
+        current_user.user_id,
+    )
+
+    return AIRecommendResponse(
+        plan_id=plan_id,
+        clips=[
+            {
+                "clip_type": c["clip_type"],
+                "order": c["order"],
+                "text_content": c.get("text_content", ""),
+                "duration": c["duration"],
+                "transition_effect": c.get("transition_effect", "cut"),
+                "asset_id": c.get("asset_id", ""),
+                "start_time": c.get("start_time", 0.0),
+                "config": c.get("config", {}),
+            }
+            for c in result["clips"]
+        ],
+        config=normalized_config,
+        total_duration=result["total_duration"],
+        confidence=result["confidence"],
+    )
+
+
+@router.post("/generate-cover", response_model=GenerateCoverResponse)
+def editor_generate_cover(
+    template_id: str,
+    body: GenerateCoverRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    current_user: AuthenticatedUser = Depends(get_current_user),
+) -> GenerateCoverResponse:
+    """AI 生成封面"""
+    _, plan_svc = services
+    plan = plan_svc.get_plan_or_raise(plan_id)
+
+    from apps.worker.worker_app.tasks.ai_tasks import run_generate_cover
+
+    cover_data = run_generate_cover(
+        plan_id=plan_id,
+        asset_ids=body.asset_ids,
+        cover_type=body.cover_type,
+        frame_time=body.frame_time,
+    )
+
+    current_config = dict(plan.config) if plan.config else {}
+    current_config["cover"] = cover_data
+    normalized = normalize_plan_config(current_config)
+    plan_svc.update_plan_config(plan_id, {"cover": normalized["cover"]})
+
+    logger.info(
+        "模板编辑器封面生成: template_id=%s plan_id=%s type=%s by user=%s",
+        template_id,
+        plan_id,
+        body.cover_type,
+        current_user.user_id,
+    )
+
+    return GenerateCoverResponse(plan_id=plan_id, cover=cover_data)
+
+
+# ── 字幕模块 ────────────────────────────────────────────────────────────────
+
+
+@router.get("/clips/{clip_id}/subtitles", response_model=list[dict[str, Any]])
+def get_editor_clip_subtitles(
+    template_id: str,
+    clip_id: str,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> list[dict[str, Any]]:
+    """获取片段的字幕列表"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+    config = clip.config or {}
+    subtitles = config.get("subtitles", [])
+    if not isinstance(subtitles, list):
+        subtitles = []
+    return subtitles
+
+
+@router.post("/clips/{clip_id}/subtitles", response_model=dict[str, Any])
+def create_editor_clip_subtitle(
+    template_id: str,
+    clip_id: str,
+    body: dict[str, Any],
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> dict[str, Any]:
+    """新增片段字幕"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    config = dict(clip.config) if clip.config else {}
+    subtitles = config.get("subtitles", [])
+    if not isinstance(subtitles, list):
+        subtitles = []
+
+    new_id = f"sub_{len(subtitles) + 1}"
+    new_subtitle = {
+        "id": body.get("id", new_id),
+        "start_time": body.get("start_time", 0.0),
+        "end_time": body.get("end_time", 0.0),
+        "text": body.get("text", ""),
+        "style": body.get("style", {}),
+    }
+    subtitles.append(new_subtitle)
+    config["subtitles"] = subtitles
+
+    plan_svc.update_clip(clip_id, config=config)
+    return new_subtitle
+
+
+@router.put("/clips/{clip_id}/subtitles/{subtitle_id}", response_model=dict[str, Any])
+def update_editor_clip_subtitle(
+    template_id: str,
+    clip_id: str,
+    subtitle_id: str,
+    body: dict[str, Any],
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> dict[str, Any]:
+    """更新片段字幕"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    config = dict(clip.config) if clip.config else {}
+    subtitles = config.get("subtitles", [])
+    if not isinstance(subtitles, list):
+        subtitles = []
+
+    found = False
+    for i, sub in enumerate(subtitles):
+        if sub.get("id") == subtitle_id:
+            subtitles[i].update(body)
+            found = True
+            break
+
+    if not found:
+        raise HTTPException(status_code=404, detail="字幕不存在")
+
+    config["subtitles"] = subtitles
+    plan_svc.update_clip(clip_id, config=config)
+    return subtitles[i]
+
+
+@router.delete("/clips/{clip_id}/subtitles/{subtitle_id}", status_code=status.HTTP_204_NO_CONTENT)
+def delete_editor_clip_subtitle(
+    template_id: str,
+    clip_id: str,
+    subtitle_id: str,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+):
+    """删除片段字幕"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    config = dict(clip.config) if clip.config else {}
+    subtitles = config.get("subtitles", [])
+    if not isinstance(subtitles, list):
+        subtitles = []
+
+    new_subtitles = [s for s in subtitles if s.get("id") != subtitle_id]
+    if len(new_subtitles) == len(subtitles):
+        raise HTTPException(status_code=404, detail="字幕不存在")
+
+    config["subtitles"] = new_subtitles
+    plan_svc.update_clip(clip_id, config=config)
+    return None
+
+
+@router.put("/clips/{clip_id}/subtitles", response_model=list[dict[str, Any]])
+def batch_update_editor_clip_subtitles(
+    template_id: str,
+    clip_id: str,
+    body: list[dict[str, Any]],
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> list[dict[str, Any]]:
+    """批量更新片段字幕（全量替换）"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    config = dict(clip.config) if clip.config else {}
+    config["subtitles"] = body
+    plan_svc.update_clip(clip_id, config=config)
+    return body
+
+
+# ── 片段调整模块 ──────────────────────────────────────────────────────────────
+
+
+def _get_clip_config(clip) -> dict:
+    config = getattr(clip, "config", {}) or {}
+    if not isinstance(config, dict):
+        config = {}
+    return config
+
+
+def _get_adjust_volume(clip) -> float:
+    config = _get_clip_config(clip)
+    return float(config.get("volume", 1.0))
+
+
+def _get_adjust_trim(clip) -> tuple[float, float]:
+    config = _get_clip_config(clip)
+    trim_start = float(config.get("trim_start", 0.0))
+    trim_end = float(config.get("trim_end", 0.0))
+    return trim_start, trim_end
+
+
+def _build_adjust_response(clip) -> ClipAdjustResponse:
+    trim_start, trim_end = _get_adjust_trim(clip)
+    return ClipAdjustResponse(
+        clip_id=clip.id,
+        speed=clip.playback_speed,
+        volume=_get_adjust_volume(clip),
+        trim_start=trim_start,
+        trim_end=trim_end,
+        duration=clip.duration,
+    )
+
+
+def _validate_trim(trim_start: float, trim_end: float, total_duration: float) -> None:
+    if trim_start + trim_end >= total_duration:
+        raise ValueError(f"裁剪总时长（{trim_start + trim_end:.2f}s）不能大于等于片段总时长（{total_duration:.2f}s）")
+
+
+@router.put("/clips/{clip_id}/speed", response_model=ClipAdjustResponse)
+def adjust_editor_clip_speed(
+    template_id: str,
+    clip_id: str,
+    body: SpeedAdjustRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> ClipAdjustResponse:
+    """调整片段播放速度"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    updated = plan_svc.update_clip(clip_id, playback_speed=body.speed)
+    return _build_adjust_response(updated)
+
+
+@router.put("/clips/{clip_id}/volume", response_model=ClipAdjustResponse)
+def adjust_editor_clip_volume(
+    template_id: str,
+    clip_id: str,
+    body: VolumeAdjustRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> ClipAdjustResponse:
+    """调整片段音量"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    config = dict(_get_clip_config(clip))
+    config["volume"] = body.volume
+    updated = plan_svc.update_clip(clip_id, config=config)
+    return _build_adjust_response(updated)
+
+
+@router.put("/clips/{clip_id}/trim", response_model=ClipAdjustResponse)
+def adjust_editor_clip_trim(
+    template_id: str,
+    clip_id: str,
+    body: TrimAdjustRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> ClipAdjustResponse:
+    """裁剪片段（trim in/out）"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    try:
+        _validate_trim(body.trim_start, body.trim_end, clip.duration)
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e)) from e
+
+    config = dict(_get_clip_config(clip))
+    config["trim_start"] = body.trim_start
+    config["trim_end"] = body.trim_end
+    updated = plan_svc.update_clip(clip_id, config=config)
+    return _build_adjust_response(updated)
+
+
+@router.put("/clips/{clip_id}/adjustments", response_model=ClipAdjustResponse)
+def adjust_editor_clip_all(
+    template_id: str,
+    clip_id: str,
+    body: ClipAdjustmentsRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> ClipAdjustResponse:
+    """统一调整片段的 speed / volume / trim"""
+    _, plan_svc = services
+    clip = plan_svc.get_clip(clip_id)
+    if not clip:
+        raise HTTPException(status_code=404, detail="片段不存在")
+
+    update_kwargs: dict[str, Any] = {}
+    config_updates: dict[str, Any] = {}
+
+    if body.speed is not None:
+        update_kwargs["playback_speed"] = body.speed
+    if body.volume is not None:
+        config_updates["volume"] = body.volume
+    if body.trim_start is not None:
+        config_updates["trim_start"] = body.trim_start
+    if body.trim_end is not None:
+        config_updates["trim_end"] = body.trim_end
+
+    current_trim_start, current_trim_end = _get_adjust_trim(clip)
+    new_trim_start = body.trim_start if body.trim_start is not None else current_trim_start
+    new_trim_end = body.trim_end if body.trim_end is not None else current_trim_end
+
+    if body.trim_start is not None or body.trim_end is not None:
+        try:
+            _validate_trim(new_trim_start, new_trim_end, clip.duration)
+        except ValueError as e:
+            raise HTTPException(status_code=400, detail=str(e)) from e
+
+    if config_updates:
+        config = dict(_get_clip_config(clip))
+        config.update(config_updates)
+        update_kwargs["config"] = config
+
+    if not update_kwargs:
+        return _build_adjust_response(clip)
+
+    updated = plan_svc.update_clip(clip_id, **update_kwargs)
+    return _build_adjust_response(updated)
+
+
+@router.post("/clips/batch-speed", response_model=BatchSpeedResponse)
+def batch_adjust_editor_speed(
+    template_id: str,
+    body: BatchSpeedRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> BatchSpeedResponse:
+    """批量调整草稿内所有片段的播放速度"""
+    _, plan_svc = services
+    clips = plan_svc.list_clips(plan_id, limit=500, skip=0)
+    count = 0
+    for clip in clips:
+        plan_svc.update_clip(clip.id, playback_speed=body.speed)
+        count += 1
+
+    return BatchSpeedResponse(updated_count=count, plan_id=plan_id)
+
+
+# ── 封面管理模块 ──────────────────────────────────────────────────────────────
+
+
+@router.get("/cover", response_model=CoverConfigResponse)
+def get_editor_cover(
+    template_id: str,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> CoverConfigResponse:
+    """获取草稿封面配置"""
+    _, plan_svc = services
+    plan = plan_svc.get_plan_or_raise(plan_id)
+    config = plan.config or {}
+    cover_config = config.get("cover", {})
+
+    return CoverConfigResponse(
+        plan_id=plan.id,
+        cover_type=cover_config.get("cover_type", "auto"),
+        cover_image_url=cover_config.get("cover_image_url", ""),
+        clip_id=cover_config.get("clip_id", ""),
+        frame_time=cover_config.get("frame_time", 0.0),
+    )
+
+
+@router.put("/cover", response_model=CoverConfigResponse)
+def update_editor_cover(
+    template_id: str,
+    body: CoverUpdateRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> CoverConfigResponse:
+    """更新草稿封面配置"""
+    _, plan_svc = services
+    plan = plan_svc.get_plan_or_raise(plan_id)
+
+    config = dict(plan.config) if plan.config else {}
+    current_cover = dict(config.get("cover", {}))
+    update_data = body.model_dump(exclude_none=True)
+    current_cover.update(update_data)
+
+    config["cover"] = current_cover
+    normalized = normalize_plan_config(config)
+    plan_svc.update_plan_config(plan_id, {"cover": normalized["cover"]})
+
+    return CoverConfigResponse(
+        plan_id=plan.id,
+        cover_type=current_cover.get("cover_type", "auto"),
+        cover_image_url=current_cover.get("cover_image_url", ""),
+        clip_id=current_cover.get("clip_id", ""),
+        frame_time=current_cover.get("frame_time", 0.0),
+    )
+
+
+@router.post("/cover/extract", response_model=CoverGenerateResponse)
+def extract_editor_cover(
+    template_id: str,
+    body: CoverExtractRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    current_user: AuthenticatedUser = Depends(get_current_user),
+) -> CoverGenerateResponse:
+    """从指定片段抽帧生成封面"""
+    _, plan_svc = services
+    plan = plan_svc.get_plan_or_raise(plan_id)
+
+    clip = plan_svc.get_clip(body.clip_id)
+    if not clip or clip.plan_id != plan_id:
+        raise HTTPException(status_code=400, detail="片段不存在或不属于当前草稿")
+
+    cover_url = f"cover/extract/{plan_id}_{body.clip_id}_{body.frame_time}.jpg"
+
+    config = dict(plan.config) if plan.config else {}
+    cover_config = dict(config.get("cover", {}))
+    cover_config.update(
+        {
+            "cover_type": "extract",
+            "cover_image_url": cover_url,
+            "clip_id": body.clip_id,
+            "frame_time": body.frame_time,
+        }
+    )
+    config["cover"] = cover_config
+    normalized = normalize_plan_config(config)
+    plan_svc.update_plan_config(plan_id, {"cover": normalized["cover"]})
+
+    logger.info(
+        "模板编辑器封面抽帧: template_id=%s plan_id=%s clip_id=%s by user=%s",
+        template_id,
+        plan_id,
+        body.clip_id,
+        current_user.user_id,
+    )
+
+    return CoverGenerateResponse(
+        plan_id=plan_id,
+        cover_url=cover_url,
+        cover_type="extract",
+    )
+
+
+@router.post("/cover/smart", response_model=CoverGenerateResponse)
+def smart_editor_cover(
+    template_id: str,
+    body: CoverSmartRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    current_user: AuthenticatedUser = Depends(get_current_user),
+) -> CoverGenerateResponse:
+    """智能选帧生成封面"""
+    _, plan_svc = services
+    plan = plan_svc.get_plan_or_raise(plan_id)
+
+    cover_url = f"cover/smart/{plan_id}_smart.jpg"
+
+    config = dict(plan.config) if plan.config else {}
+    cover_config = dict(config.get("cover", {}))
+    cover_config.update(
+        {
+            "cover_type": "smart",
+            "cover_image_url": cover_url,
+            "strategy": body.strategy,
+        }
+    )
+    config["cover"] = cover_config
+    normalized = normalize_plan_config(config)
+    plan_svc.update_plan_config(plan_id, {"cover": normalized["cover"]})
+
+    logger.info(
+        "模板编辑器智能封面: template_id=%s plan_id=%s strategy=%s by user=%s",
+        template_id,
+        plan_id,
+        body.strategy,
+        current_user.user_id,
+    )
+
+    return CoverGenerateResponse(
+        plan_id=plan_id,
+        cover_url=cover_url,
+        cover_type="smart",
+    )
+
+
+# ── 片段批量操作模块 ────────────────────────────────────────────────────────
+
+
+@router.post("/clips/reorder", response_model=ClipReorderResponse)
+def reorder_editor_clips(
+    template_id: str,
+    body: ClipReorderRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> ClipReorderResponse:
+    """批量重排片段顺序"""
+    _, plan_svc = services
+    count = 0
+    for item in body.items:
+        try:
+            plan_svc.update_clip(item.clip_id, order=item.order)
+            count += 1
+        except ValueError:
+            pass
+
+    return ClipReorderResponse(updated_count=count, plan_id=plan_id)
+
+
+@router.post("/clips/batch-delete", response_model=ClipBatchDeleteResponse)
+def batch_delete_editor_clips(
+    template_id: str,
+    body: ClipBatchDeleteRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    _: AuthenticatedUser = Depends(get_current_user),
+) -> ClipBatchDeleteResponse:
+    """批量删除片段"""
+    _, plan_svc = services
+    deleted = 0
+    for clip_id in body.clip_ids:
+        if plan_svc.delete_clip(clip_id):
+            deleted += 1
+
+    return ClipBatchDeleteResponse(deleted_count=deleted, plan_id=plan_id)
+
+
+@router.post("/clips/from-assets", response_model=ClipsFromAssetsResponse)
+def create_clips_from_assets_editor(
+    template_id: str,
+    body: ClipsFromAssetsRequest,
+    plan_id: str = Depends(get_draft_plan_id),
+    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
+    current_user: AuthenticatedUser = Depends(get_current_user),
+) -> ClipsFromAssetsResponse:
+    """从素材批量创建片段"""
+    _, plan_svc = services
+    clips = []
+    for i, asset_id in enumerate(body.asset_ids):
+        try:
+            clip = plan_svc.create_clip(
+                plan_id,
+                clip_type="main",
+                order=body.start_order + i if hasattr(body, "start_order") else i,
+                duration=5.0,
+                asset_id=asset_id,
+            )
+            clips.append(clip)
+        except ValueError:
+            pass
+
+    logger.info(
+        "模板编辑器从素材创建片段: template_id=%s plan_id=%s count=%d by user=%s",
+        template_id,
+        plan_id,
+        len(clips),
+        current_user.user_id,
+    )
+
+    return ClipsFromAssetsResponse(
+        created_count=len(clips),
+        plan_id=plan_id,
+        clip_ids=[c.id for c in clips],
+    )