上线版: 产品表单统一+form嵌套修复+用户管理+部署+三套叙事

- 产品编辑入口统一走 ProductFormFull(卖点/风格/人群/品牌词全字段);
  修复开任务页 <form> 套 <form> 致"编辑产品"报错、改不了、跳回首个产品
- dashboard 入口卡片对齐实际路由: 系统管理(/config) 与 工作配置(/settings) 分开;
  settings ?tab=products 直达改用挂载后读 URL, 消除 hydration mismatch
- 新增用户管理(users API/admin service/改密页) + alembic 022/023/024
- 上线部署: Dockerfile / docker-compose.prod+https / nginx https / .env.example
- A8 三套正交叙事(痛点/场景/成分背书) + beige 调色去AI化 + 飞轮 text_import 高权重信号

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/api/v1/tasks.py

@@ -13,7 +13,11 @@ from sqlalchemy.orm import Session
 
 from app.core.database import get_db
 from app.core.response import ok, paginate, raise_not_found
-from app.middleware.workspace_guard import CurrentUser, require_write_permission
+from app.middleware.workspace_guard import (
+    CurrentUser,
+    require_admin,
+    require_write_permission,
+)
 from app.models.task import GenerationTask, ImageCandidate, TextCandidate
 
 logger = logging.getLogger(__name__)
@@ -227,3 +231,42 @@ def get_task(
         "text_candidates": [_fmt_text(tc) for tc in texts],
         "image_candidates": [_fmt_image(ic) for ic in images],
     })
+
+
+@router.delete("/{task_id}")
+def delete_task(
+    task_id: int,
+    current_user: Annotated[CurrentUser, Depends(require_admin)] = None,
+    db: Session = Depends(get_db),
+):
+    """删除整个图文任务（仅管理员，倩倩姐2026-06-26拍板）。
+    智能删：有成品(delivery_packages)→转归档保留(status=archived，不进看板)；
+    无成品(残次/废稿)→物理删（先清 ai_call_logs/preference_events 外键，候选 CASCADE）。
+    """
+    from datetime import datetime
+
+    from app.models.flywheel import AiCallLog, PreferenceEvent
+    from app.models.task import DeliveryPackage
+    from app.constants.enums import TaskStatus
+
+    task = db.query(GenerationTask).filter(GenerationTask.id == task_id).first()
+    task = _check_task_ownership(task, current_user.workspace_id)
+
+    has_package = (
+        db.query(DeliveryPackage.id)
+        .filter(DeliveryPackage.task_id == task_id)
+        .first()
+        is not None
+    )
+    if has_package:
+        task.status = TaskStatus.ARCHIVED.value
+        task.archived_at = datetime.utcnow()
+        db.commit()
+        return ok({"task_id": task_id, "action": "archived"})
+
+    # 物理删：先清无 CASCADE 的外键引用（候选表 CASCADE 自动删）
+    db.query(AiCallLog).filter(AiCallLog.task_id == task_id).delete(synchronize_session=False)
+    db.query(PreferenceEvent).filter(PreferenceEvent.task_id == task_id).delete(synchronize_session=False)
+    db.delete(task)
+    db.commit()
+    return ok({"task_id": task_id, "action": "deleted"})