fix(viral-video): P1 VLM模型ID/僵尸任务心跳/文案兜底/P2 ratio映射/OSS一致性

P1-1: VLM lite/pro模型ID修正（250915→250315/250328），根因是旧ID不存在导致lite必然超时降级pro
- packages/config/base.py: doubao_vision_model/pro/lite 改为火山方舟官方正确ID
- packages/shared/ai_client.py docstring同步更新
- apps/worker/worker_app/tasks/viral_video.py 硬编码字符串同步
- .env.example 同步新ID

P1-2: worker心跳+僵尸任务超时回收
- packages/domain/viral_video.py: 新增heartbeat_at字段+touch_heartbeat()方法
- packages/adapters/sqlalchemy_impl/models.py: ViralVideoJobModel加heartbeat_at列(index=True)
- packages/adapters/sqlalchemy_impl/viral_video_repository.py: to_entity/save/update映射heartbeat_at
- alembic/versions/092_viral_video_heartbeat.py: 幂等迁移，加列+index+给已有running任务初始化
- apps/worker/worker_app/tasks/viral_video.py:
  - 新增_start_heartbeat_thread后台线程，每25s独立session更新heartbeat_at
  - 新增_recover_stale_jobs(): running>10min且心跳>2min未更新→自动标记failed
  - pipeline/analyze/generate_copy/render四个celery任务接入心跳启停+启动时回收僵尸
- apps/api/app/api/routes/viral_video.py: retry接口放宽，允许对超时僵尸任务重试

P1-3: 文案生成质量与兜底修复
- 兜底脚本'很近'→'最近'（之前commit已改）
- _step_script_generation 三级重试: fast(0.8/2500tok)→fast(0.6/3200tok)→pro(0.7/3500tok)
- 新增fallback判定：口播<20字/含兜底特征串/镜头数<1才视为降级，避免正常短脚本误判
- prompt关键要求新增'输出前自检：口播禁止错别字和语病'
- 关键路径打info日志（模型/label/口播长度/镜头数/是否兜底），便于后续排查

P2-1: Seedance图生视频ratio不生效导致9:16出1:1
- 根因: 旧逻辑Bug #2110在image_url存在时不传ratio，模型默认adaptive→首帧方图商品图输出1:1
- 官方文档确认图生视频支持ratio参数，模型会自动居中裁剪首帧
- packages/shared/ai_client.py+ai_service.py: 删除image_url判空，始终传ratio
- 同步更新docstring注释

P2-2: OSS成片eventual consistency导致completed后NoSuchKey
- apps/worker/worker_app/tasks/viral_video.py: 新增_wait_oss_ready(url,timeout=10s)
- mark_completed前循环HEAD公网URL，等200+content-length>0或10s超时

测试: viral-video相关97个单测全部通过，仅更新test_passes_reference_params_to_client以反映新ratio透传行为

.env.example

@@ -217,8 +217,8 @@ DOUBAO_BASE_URL=https://ark.cn-beijing.volces.com/api/v3
 DOUBAO_TIMEOUT=30
 DOUBAO_MAX_RETRIES=2
 # 视觉模型：pro 精度高，lite 速度快（viral-video 商品识别默认用 lite 提速）
-DOUBAO_VISION_MODEL=doubao-1-5-vision-pro-250915
-DOUBAO_VISION_LITE_MODEL=doubao-1-5-vision-lite-250915
+DOUBAO_VISION_MODEL=doubao-1-5-vision-pro-250328
+DOUBAO_VISION_LITE_MODEL=doubao-1-5-vision-lite-250315
 DOUBAO_VISION_USE_LITE=true
 
 # ==================== 积分/会员系统 (#1895) ====================

alembic/versions/092_viral_video_heartbeat.py

@@ -0,0 +1,42 @@
+"""viral_video_jobs 增加 heartbeat_at 列（worker 心跳，用于僵尸任务超时回收）
+
+Revision ID: 092_viral_video_heartbeat
+Revises: 091_viral_video_stage
+Create Date: 2026-10-02
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "092_viral_video_heartbeat"
+down_revision = "091_viral_video_stage"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    cols = {c["name"] for c in inspector.get_columns("viral_video_jobs")}
+    if "heartbeat_at" not in cols:
+        op.add_column("viral_video_jobs", sa.Column("heartbeat_at", sa.DateTime(), nullable=True))
+        op.execute(
+            "UPDATE viral_video_jobs SET heartbeat_at = updated_at "
+            "WHERE status = 'running' AND heartbeat_at IS NULL"
+        )
+        try:
+            op.create_index("ix_viral_video_jobs_heartbeat_at", "viral_video_jobs", ["heartbeat_at"])
+        except Exception:
+            pass
+
+
+def downgrade() -> None:
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    cols = {c["name"] for c in inspector.get_columns("viral_video_jobs")}
+    if "heartbeat_at" in cols:
+        try:
+            op.drop_index("ix_viral_video_jobs_heartbeat_at", table_name="viral_video_jobs")
+        except Exception:
+            pass
+        op.drop_column("viral_video_jobs", "heartbeat_at")

apps/api/app/api/routes/viral_video.py

@@ -400,28 +400,42 @@ def retry_viral_video_job(
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
     session: Session = Depends(get_db_session),
 ) -> ViralVideoJobResponse:
-    """重试失败的爆款视频任务。"""
+    """重试失败的爆款视频任务（也支持对僵尸/超时 running 任务强制重置后重试）。"""
+    from datetime import datetime, timedelta, timezone
+
     repo = _get_job_repo(session)
     job = repo.get(job_id)
     if job is None:
         raise HTTPException(status_code=404, detail="任务不存在")
     if job.user_id != authenticated_user.user.id:
         raise HTTPException(status_code=403, detail="无权操作此任务")
-    if job.status != ViralVideoStatus.FAILED:
-        raise HTTPException(status_code=409, detail="只有失败的任务可以重试")
+
+    # 判定是否为僵尸 running 任务：running 超过 10 分钟且心跳停止超过 2 分钟
+    now = datetime.now(timezone.utc)
+    is_stale_running = False
+    if job.status == ViralVideoStatus.RUNNING and job.started_at is not None:
+        hb = getattr(job, "heartbeat_at", None) or job.updated_at
+        if (now - job.started_at).total_seconds() > 10 * 60 and hb is not None and (now - hb).total_seconds() > 2 * 60:
+            is_stale_running = True
+
+    if job.status != ViralVideoStatus.FAILED and not is_stale_running:
+        raise HTTPException(status_code=409, detail="只有失败或超时的任务可以重试")
 
     # 重置状态
     job.retry_count += 1
     job.status = ViralVideoStatus.PENDING
-    job.error_msg = ""
+    job.error_msg = "" if not is_stale_running else "任务执行超时，已重置重试"
     job.started_at = None
     job.completed_at = None
+    job.current_stage = ""
+    job.phase_message = ""
+    job.heartbeat_at = None
     repo.update(job)
 
     # 重新入队
     try:
         celery_app.send_task("worker.run_viral_video_pipeline", args=[job.id])
-        logger.info("[爆款视频] 重试入队: job_id=%s retry_count=%d", job.id, job.retry_count)
+        logger.info("[爆款视频] 重试入队: job_id=%s retry_count=%d stale=%s", job.id, job.retry_count, is_stale_running)
     except Exception as e:
         logger.error("[爆款视频] 重试入队失败: %s", e, exc_info=True)
         job.mark_failed(f"重试入队失败: {e}")

apps/worker/worker_app/tasks/viral_video.py

@@ -25,6 +25,8 @@ import os
 import tempfile
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from pathlib import Path
+import threading
+import time
 
 from celery import Task, shared_task
 from celery.exceptions import Retry
@@ -106,6 +108,95 @@ def _set_stage(job, repo, session, stage: str, message: str, persist: bool = Tru
             logger.warning("[爆款视频] 阶段持久化失败 stage=%s err=%s", stage, e)
 
 
+# ── worker 心跳（僵尸任务检测） ─────────────────────────────────────────
+
+# 心跳间隔（秒）；超过此时间未更新 heartbeat_at 视为 worker 异常
+_HEARTBEAT_INTERVAL_SEC = 25
+# 任务整体超时：running 超过此时长且心跳停止，则判定为僵尸并回收
+_STALE_RUNNING_TIMEOUT_SEC = 10 * 60  # 10 分钟
+# 心跳过期窗口：heartbeat_at 距 now 超过此时长视为失效
+_HEARTBEAT_EXPIRE_SEC = 2 * 60  # 2 分钟
+
+
+def _heartbeat_once(job_id: str) -> None:
+    """在独立 session 中更新一次 heartbeat_at（不捕获主流程事务状态）。"""
+    ssn = None
+    try:
+        from datetime import datetime, timezone
+        ssn = SessionLocal()
+        model = ssn.execute(
+            __import__("sqlalchemy").text(
+                "UPDATE viral_video_jobs SET heartbeat_at = :now, updated_at = :now "
+                "WHERE id = :jid AND status = 'running'"
+            ),
+            {"now": datetime.now(timezone.utc), "jid": job_id},
+        )
+        ssn.commit()
+    except Exception as e:
+        logger.warning("[爆款视频] 心跳更新失败 job=%s err=%s", job_id, e)
+    finally:
+        if ssn is not None:
+            try:
+                ssn.close()
+            except Exception:
+                pass
+
+
+def _start_heartbeat_thread(job_id: str) -> tuple[threading.Event, threading.Thread]:
+    """启动后台心跳线程，每 _HEARTBEAT_INTERVAL_SEC 秒更新一次 heartbeat_at。
+    返回 (stop_event, thread)；任务结束时调用 stop_event.set() 停止心跳。
+    """
+    stop = threading.Event()
+
+    def _loop():
+        # 立即打一次心跳
+        _heartbeat_once(job_id)
+        while not stop.wait(_HEARTBEAT_INTERVAL_SEC):
+            _heartbeat_once(job_id)
+
+    t = threading.Thread(target=_loop, name=f"vv-heartbeat-{job_id[:8]}", daemon=True)
+    t.start()
+    return stop, t
+
+
+def _recover_stale_jobs() -> int:
+    """启动/定时扫描：把僵尸任务（running 超时且心跳停止）标记为 failed。
+    返回本次回收的任务数。可由 celery beat 周期性调用，也可在任务启动前顺带扫一次。
+    """
+    from datetime import datetime, timedelta, timezone
+
+    ssn = None
+    try:
+        ssn = SessionLocal()
+        now = datetime.now(timezone.utc)
+        # 判定条件：status=running 且 (started_at 距今 > 10min) 且 (heartbeat_at < now-2min 或 heartbeat_at IS NULL 且 updated_at < now-2min)
+        cutoff_beat = now - timedelta(seconds=_HEARTBEAT_EXPIRE_SEC)
+        cutoff_start = now - timedelta(seconds=_STALE_RUNNING_TIMEOUT_SEC)
+        sql = __import__("sqlalchemy").text(
+            "UPDATE viral_video_jobs "
+            "SET status='failed', error_msg='任务执行超时，请重试', updated_at=:now "
+            "WHERE status='running' "
+            "  AND started_at IS NOT NULL AND started_at < :cutoff_start "
+            "  AND (heartbeat_at IS NULL OR heartbeat_at < :cutoff_beat) "
+            "  AND (heartbeat_at IS NOT NULL OR updated_at < :cutoff_beat)"
+        )
+        result = ssn.execute(sql, {"now": now, "cutoff_start": cutoff_start, "cutoff_beat": cutoff_beat})
+        ssn.commit()
+        cnt = result.rowcount or 0
+        if cnt > 0:
+            logger.warning("[爆款视频] 回收 %d 个僵尸 running 任务", cnt)
+        return cnt
+    except Exception as e:
+        logger.warning("[爆款视频] 僵尸任务扫描失败: %s", e)
+        return 0
+    finally:
+        if ssn is not None:
+            try:
+                ssn.close()
+            except Exception:
+                pass
+
+
 # ── 默认结构 ─────────────────────────────────────────────────────────────
 
 _DEFAULT_HARD_CONSTRAINTS = [
@@ -329,8 +420,8 @@ def _step_image_analysis(job: ViralVideoJob) -> dict:
             pro_model = None  # 已经是 pro，不再降级
             vision_timeout = 60
     except Exception:
-        vision_model = "doubao-1-5-vision-lite-250915"
-        pro_model = "doubao-1-5-vision-pro-250915"
+        vision_model = "doubao-1-5-vision-lite-250315"
+        pro_model = "doubao-1-5-vision-pro-250328"
         vision_timeout = 25
 
     results: list[dict] = [None] * len(job.images)  # type: ignore
@@ -537,7 +628,8 @@ _SCRIPT_GENERATION_PROMPT = """你是资深短视频导演，为 Seedance 2.5（
 6. hard_constraints/negative_prompts 保留默认项可追加，不要删减。
 7. voiceover_script 为纯口播文本（无标记/括号/前缀），{duration}秒约{approx_chars}字。
 8. 严格按上方「爆款结构」的节奏/段落顺序编排（钩子/痛点/反转/案例/行动号召与结构对齐）。
-"""
+9. 输出前自检：口播对白禁止错别字和语病（特别注意"很/最"等常见误用），同音字错误一律修正。
+10. 必须使用产品信息中真实的品牌、品名和外观特征，不要编造与产品无关的内容。"""
 
 
 def _build_products_summary(image_analysis: dict) -> str:
@@ -814,13 +906,48 @@ def _step_script_generation(job: ViralVideoJob, intent: dict, image_analysis: di
 
     _s = get_shared_settings()
     _fast = _s.doubao_fast_model
+    _pro = getattr(_s, "doubao_model", None) or _fast
+
+    def _try_gen(model: str, temp: float, max_tok: int, label: str):
+        logger.info("[爆款视频] 编导脚本生成 model=%s label=%s", model, label)
+        r = call_llm(prompt, temperature=temp, max_tokens=max_tok, model=model)
+        if r is None:
+            logger.warning("[爆款视频] 编导脚本返回None label=%s", label)
+            return None
+        parsed = _safe_json_loads(r)
+        normalized = _validate_and_normalize_script(parsed, job)
+        voiceover = (normalized or {}).get("voiceover_script") or ""
+        voiceover_len = len(voiceover)
+        shots_cnt = len((normalized or {}).get("shots") or [])
+        # 判定是否"退化到兜底质量"：口播过短（<20字）或镜头数<1；正常的短口播（如15s视频~40字）不视为兜底
+        fallback_marker = "我最近在用的好物" in voiceover  # _fallback_script 的特征串
+        is_fallback = fallback_marker or shots_cnt < 1 or voiceover_len < 20
+        logger.info(
+            "[爆款视频] 编导脚本结果 label=%s voiceover_len=%d shots=%d fallback=%s raw_type=%s",
+            label, voiceover_len, shots_cnt, is_fallback, type(r).__name__,
+        )
+        if is_fallback:
+            return None  # 触发重试
+        return normalized
+
     try:
-        # 编导脚本是结构化 JSON 输出，用快模型提速（temperature 稍高保证创意）
-        result = call_llm(prompt, temperature=0.8, max_tokens=2500, model=_fast)
-        parsed = _safe_json_loads(result)
-        return _validate_and_normalize_script(parsed, job)
+        # 第一次：快模型
+        normalized = _try_gen(_fast, 0.8, 2500, "fast-first")
+        if normalized is not None:
+            return normalized
+        # 第二次：快模型降温度+加大 max_tokens
+        normalized = _try_gen(_fast, 0.6, 3200, "fast-retry")
+        if normalized is not None:
+            return normalized
+        # 第三次：用主力模型兜底
+        if _pro and _pro != _fast:
+            normalized = _try_gen(_pro, 0.7, 3500, "pro-fallback")
+            if normalized is not None:
+                return normalized
+        logger.warning("[爆款视频] 编导脚本三次都未生成合格结果，使用兜底脚本")
+        return _fallback_script(job)
     except Exception as e:
-        logger.warning("[爆款视频] 编导脚本生成失败: %s，使用兜底脚本", e, exc_info=True)
+        logger.warning("[爆款视频] 编导脚本生成异常: %s，使用兜底脚本", e, exc_info=True)
         return _fallback_script(job)
 
 
@@ -1029,6 +1156,26 @@ def _step_upload(job: ViralVideoJob, video_path: str) -> str:
     return video_url
 
 
+def _wait_oss_ready(url: str, timeout_sec: int = 10) -> bool:
+    """轮询 OSS 公网 URL，直到 HEAD 返回 200 或超时。
+    用于缓解 OSS 上传后 1-5s 公网 eventual consistency 导致的 NoSuchKey。
+    """
+    import httpx
+    deadline = time.monotonic() + timeout_sec
+    last_status = 0
+    while time.monotonic() < deadline:
+        try:
+            r = httpx.head(url, follow_redirects=True, timeout=3.0)
+            last_status = r.status_code
+            if r.status_code == 200 and int(r.headers.get("content-length", "0") or 0) > 0:
+                return True
+        except Exception as e:
+            logger.debug("[爆款视频] OSS head 轮询失败: %s", e)
+        time.sleep(1.0)
+    logger.warning("[爆款视频] OSS 成片在 %ds 内未就绪 last_status=%s url=%s", timeout_sec, last_status, url[:120])
+    return False
+
+
 # ── 主编排器 ────────────────────────────────────────────────────────────
 
 
@@ -1037,11 +1184,15 @@ def run_viral_video_pipeline(self: Task, job_id: str) -> dict:
     """旧一键流水线（保留兼容）：图片分析→风格分析→意图解析→WAIT_USER_CONFIRM。"""
     session = None
     try:
+        _recover_stale_jobs()  # 顺带回收僵尸任务
+        _hb_stop = None
         session, repo, job = _get_repo_and_job(job_id)
         if job is None:
             return {"ok": False, "error": "job not found"}
 
         job.mark_running()
+        _save_job(repo, job, session)
+        _hb_stop, _hb_thread = _start_heartbeat_thread(job_id)
         _set_stage(job, repo, session, ViralVideoStage.IMAGE_ANALYSIS, "正在分析商品特征...")
 
         image_analysis = _step_image_analysis(job)
@@ -1088,6 +1239,8 @@ def run_viral_video_pipeline(self: Task, job_id: str) -> dict:
         _mark_failed_and_notify(job_id, session, None, None, str(e), "")
         return {"ok": False, "job_id": job_id, "error": str(e)}
     finally:
+        if _hb_stop is not None:
+            _hb_stop.set()
         if session:
             session.close()
 
@@ -1170,11 +1323,15 @@ def run_viral_video_analyze(self: Task, job_id: str) -> dict:
     """v1.5+ 阶段1：图片 VLM 分析 + 可选视频风格分析。"""
     session = None
     try:
+        _recover_stale_jobs()  # 顺带回收僵尸任务
+        _hb_stop = None
         session, repo, job = _get_repo_and_job(job_id)
         if job is None:
             return {"ok": False, "error": "job not found"}
 
         job.mark_running()
+        _save_job(repo, job, session)
+        _hb_stop, _hb_thread = _start_heartbeat_thread(job_id)
         _set_stage(job, repo, session, ViralVideoStage.IMAGE_ANALYSIS, "正在分析商品特征...")
 
         image_analysis = _step_image_analysis(job)
@@ -1217,6 +1374,8 @@ def run_viral_video_analyze(self: Task, job_id: str) -> dict:
         _mark_failed_and_notify(job_id, session, None, None, str(e), ViralVideoStage.IMAGE_ANALYSIS)
         return {"ok": False, "job_id": job_id, "error": str(e)}
     finally:
+        if _hb_stop is not None:
+            _hb_stop.set()
         if session:
             session.close()
 
@@ -1233,11 +1392,16 @@ def run_viral_video_generate_copy(self: Task, job_id: str) -> dict:
     """
     session = None
     try:
+        _recover_stale_jobs()  # 顺带回收僵尸任务
+        _hb_stop = None
         session, repo, job = _get_repo_and_job(job_id)
         if job is None:
             return {"ok": False, "error": "job not found"}
         if job.status != ViralVideoStatus.RUNNING:
             return {"ok": False, "error": f"unexpected status: {job.status}"}
+        job.touch_heartbeat()
+        _save_job(repo, job, session)
+        _hb_stop, _hb_thread = _start_heartbeat_thread(job_id)
 
         # 阶段：意图解析
         _set_stage(job, repo, session, ViralVideoStage.INTENT_PARSING, "正在解析文案意图...")
@@ -1306,6 +1470,8 @@ def run_viral_video_generate_copy(self: Task, job_id: str) -> dict:
         _mark_failed_and_notify(job_id, session, None, None, str(e), ViralVideoStage.SCRIPT_GENERATION)
         return {"ok": False, "job_id": job_id, "error": str(e)}
     finally:
+        if _hb_stop is not None:
+            _hb_stop.set()
         if session:
             session.close()
 
@@ -1402,6 +1568,11 @@ def _run_render_pipeline(job_id: str, session, repo, job) -> dict:
     _set_stage(job, repo, session, ViralVideoStage.UPLOADING, "正在上传视频...")
     video_url = _step_upload(job, video_path)
 
+    # P2-2 OSS 一致性：上传后循环 head 确认公网可访问（最多等 10s），
+    # 避免前端拿到 completed 立即下载时命中 NoSuchKey。
+    if video_url:
+        _wait_oss_ready(video_url, timeout_sec=10)
+
     job.credits_cost = CREDITS_VIRAL_VIDEO_COST
     job.mark_completed(video_url)
     job.current_stage = ViralVideoStage.UPLOADING
@@ -1425,11 +1596,16 @@ def run_viral_video_render(self: Task, job_id: str) -> dict:
     """v1.6 阶段3：TTS + 单次 Seedance 生成 + 上传。"""
     session = None
     try:
+        _recover_stale_jobs()  # 顺带回收僵尸任务
+        _hb_stop = None
         session, repo, job = _get_repo_and_job(job_id)
         if job is None:
             return {"ok": False, "error": "job not found"}
         if job.status != ViralVideoStatus.RUNNING:
             return {"ok": False, "error": f"unexpected status: {job.status}"}
+        job.touch_heartbeat()
+        _save_job(repo, job, session)
+        _hb_stop, _hb_thread = _start_heartbeat_thread(job_id)
         return _run_render_pipeline(job_id, session, repo, job)
     except Retry:
         raise
@@ -1438,5 +1614,7 @@ def run_viral_video_render(self: Task, job_id: str) -> dict:
         _mark_failed_and_notify(job_id, session, None, None, str(e), ViralVideoStage.RENDERING)
         return {"ok": False, "job_id": job_id, "error": str(e)}
     finally:
+        if _hb_stop is not None:
+            _hb_stop.set()
         if session:
             session.close()

packages/adapters/sqlalchemy_impl/models.py

@@ -952,6 +952,7 @@ class ViralVideoJobModel(Base):
     status = Column(String(30), nullable=False, default="pending", index=True)
     current_stage = Column(String(200), nullable=False, default="")  # 细粒度阶段 snake_case
     phase_message = Column(String(500), nullable=False, default="")  # 阶段中文提示文案
+    heartbeat_at = Column(DateTime, nullable=True, index=True)  # worker 心跳，用于僵尸任务超时回收
     intent_result = Column(JSON, nullable=True)
     image_analysis = Column(JSON, nullable=True)
     storyboard = Column(JSON, nullable=True)

packages/adapters/sqlalchemy_impl/viral_video_repository.py

@@ -39,6 +39,7 @@ def _to_domain(model: ViralVideoJobModel) -> ViralVideoJob:
         status=ViralVideoStatus(model.status) if model.status else ViralVideoStatus.PENDING,
         current_stage=getattr(model, "current_stage", "") or "",
         phase_message=getattr(model, "phase_message", "") or "",
+        heartbeat_at=getattr(model, "heartbeat_at", None),
         intent_result=dict(model.intent_result) if model.intent_result else None,
         image_analysis=dict(model.image_analysis) if getattr(model, "image_analysis", None) else None,
         storyboard=list(model.storyboard) if getattr(model, "storyboard", None) else None,
@@ -87,6 +88,7 @@ class SQLAlchemyViralVideoJobRepository:
             status=job.status,
             current_stage=job.current_stage or "",
             phase_message=job.phase_message or "",
+            heartbeat_at=job.heartbeat_at,
             intent_result=job.intent_result,
             image_analysis=job.image_analysis,
             storyboard=job.storyboard,
@@ -112,6 +114,7 @@ class SQLAlchemyViralVideoJobRepository:
         model.status = job.status
         model.current_stage = job.current_stage or ""
         model.phase_message = job.phase_message or ""
+        model.heartbeat_at = job.heartbeat_at
         model.intent_result = job.intent_result
         model.image_analysis = job.image_analysis
         model.storyboard = job.storyboard

packages/config/base.py

@@ -95,8 +95,8 @@ class SharedSettings(BaseSettings):
     doubao_base_url: str = "https://ark.cn-beijing.volces.com/api/v3"
     doubao_timeout: int = 30
     doubao_max_retries: int = 2
-    doubao_vision_model: str = "doubao-1-5-vision-pro-250915"  # 高精度视觉（备用）
-    doubao_vision_lite_model: str = "doubao-1-5-vision-lite-250915"  # 快速视觉（商品识别默认，速度优先）
+    doubao_vision_model: str = "doubao-1-5-vision-pro-250328"  # 高精度视觉（备用）
+    doubao_vision_lite_model: str = "doubao-1-5-vision-lite-250315"  # 快速视觉（商品识别默认，速度优先）
     doubao_vision_use_lite: bool = True  # viral-video 图片分析默认用 lite 提速
     doubao_embedding_model: str = "doubao-embedding-large-text-240915"
     doubao_video_model: str = "doubao-seedance-2-5-260628"

packages/domain/viral_video.py

@@ -119,6 +119,7 @@ class ViralVideoJob:
     status: ViralVideoStatus = ViralVideoStatus.PENDING
     current_stage: str = ""  # 细粒度阶段（ViralVideoStage.value，snake_case）
     phase_message: str = ""  # 阶段中文提示文案，前端轮询直接展示
+    heartbeat_at: datetime | None = None  # worker 心跳时间，用于超时僵尸任务检测
     result_video_url: str = ""
     credits_cost: int = 0
     error_msg: str = ""
@@ -140,9 +141,19 @@ class ViralVideoJob:
         ):
             raise ValueError(f"Cannot transition from {self.status} to running")
         self.status = ViralVideoStatus.RUNNING
+        now = datetime.now(timezone.utc)
         if self.started_at is None:
-            self.started_at = datetime.now(timezone.utc)
-        self.updated_at = datetime.now(timezone.utc)
+            self.started_at = now
+        self.heartbeat_at = now
+        self.updated_at = now
+
+    def touch_heartbeat(self) -> None:
+        """更新心跳时间（worker 在长任务中周期性调用，用于超时检测）。"""
+        now = datetime.now(timezone.utc)
+        if self.started_at is None:
+            self.started_at = now
+        self.heartbeat_at = now
+        self.updated_at = now
 
     def mark_image_analyzed(self) -> None:
         if self.status not in (ViralVideoStatus.PENDING, ViralVideoStatus.RUNNING):

packages/shared/ai_client.py

@@ -162,7 +162,7 @@ class DoubaoClient:
         """调用豆包视觉理解 API（OpenAI 兼容多模态格式）.
 
         将 images 附加到最后一条 user message 的 content 中，
-        使用 vision_model（默认 doubao-1-5-vision-pro-250915）。
+        使用 vision_model（默认 doubao-1-5-vision-pro-250328）。
 
         Args:
             messages: 对话消息列表。最后一条 user message 会被注入图片内容。
@@ -268,9 +268,9 @@ class DoubaoClient:
 
         Args:
             prompt: 文本提示词（含完整编导脚本：总览+场景光线+逐镜头时间轴+硬约束+负面词）
-            image_url: 首帧参考图 URL（可选，提供则走图生视频首帧模式，ratio 跟随首帧）
+            image_url: 首帧参考图 URL（可选，提供则走图生视频首帧模式，ratio 仍按参数传，模型会自动居中裁剪到目标比例）
             duration: 视频时长 4~30 秒
-            ratio: 宽高比 16:9/9:16/1:1/4:3/3:4/21:9/adaptive；image_url 存在时自动忽略
+            ratio: 宽高比 16:9/9:16/1:1/4:3/3:4/21:9/adaptive；图生视频时模型会自动居中裁剪首帧到目标比例
             resolution: 480p/720p/1080p
             generate_audio: 是否让模型原生合成音效/BGM（v1.6 默认 True，配合 reference_audios 做口型驱动）
             watermark: 是否加水印
@@ -319,8 +319,9 @@ class DoubaoClient:
         # v1.6: 参考视频（风格参考）
         if reference_videos:
             create_payload["reference_videos"] = [{"url": u} for u in reference_videos[:5] if u and isinstance(u, str)]
-        # Bug #2110 / v1.6: ratio=None 时不传（首帧图生视频跟随原图比例）
-        if ratio and not image_url:
+        # 图生视频也必须传 ratio，否则模型默认 adaptive 可能输出 1:1（首帧方形商品图会导致 960x960）
+        # 官方文档：图生视频会自动居中裁剪首帧到目标比例，支持 16:9/9:16/1:1/4:3/3:4/21:9/adaptive
+        if ratio:
             create_payload["ratio"] = ratio
 
         headers = {

packages/shared/ai_service.py

@@ -625,13 +625,14 @@ def call_video_generation(
     - reference_audios 传 TTS 音频 URL 数组做口型驱动；
     - reference_images 传产品素材 URL 数组做视觉参考；
     - 单次最长 30 秒，不分段不拼接；
-    - image_url 存在时为「首帧图生视频」模式，自动不传 ratio（Bug #2110）。
+    - 图生视频（image_url 存在）也强制传 ratio，避免商品方图导致默认输出 1:1。
+      官方文档：图生视频时 ratio 由参数决定，模型会居中裁剪首帧到目标比例。
     """
     client = get_doubao_client()
     if not client.is_available:
         logger.warning("[ai_service] 豆包客户端未配置，跳过视频生成")
         return None
-    effective_ratio = None if image_url else ratio
+    effective_ratio = ratio or "9:16"
     try:
         kwargs: dict = dict(
             prompt=prompt,

tests/unit/test_viral_video_p0.py

@@ -253,8 +253,8 @@ class TestCallVideoGenerationV16:
             )
             assert result == str(out)
             kwargs = mock_client.video_generation.call_args.kwargs
-            # 首帧模式不传 ratio（Bug #2110）
-            assert "ratio" not in kwargs
+            # 图生视频也必须传 ratio（避免首帧方图导致默认输出 1:1）
+            assert kwargs.get("ratio") == "9:16", f"ratio 应透传，got {kwargs.get('ratio')!r}"
             assert kwargs["image_url"] == "https://img/x.jpg"
             assert kwargs["reference_audios"] == ["https://oss/tts.mp3"]
             assert kwargs["reference_images"] == ["https://img/r1.jpg"]