feat(api): 核心端点 — 接收/驳回/转交/打印/上传/用户/物料/记录CRUD

新增端点:
- POST /tasks/{id}/receive — 确认接收 (PENDING→WIP)
- POST /tasks/{id}/reject  — 品质驳回 + 自动返工
- POST /tasks/{id}/transfer — 完工裂变转交 (多路分支+入库)
- PATCH /tasks/{id}/records — 追加图文记录
- PATCH /products/scan/{sn}/status — 宏观状态定调
- POST /upload/ + GET /upload/files/{name} — 文件上传
- GET /users/ — MOM用户列表
- GET /materials/groups + /materials/items — BOM物料手风琴
- POST /print/preview + /execute — 标签预览/打印
- PUT/DELETE /records/{id} — 记录编辑/删除
- GET /tasks/ 新增 assignee_id 过滤

backend/app/api/v1/endpoints/records.py

@@ -0,0 +1,48 @@
+"""任务记录 CRUD — 编辑 / 删除"""
+import json
+import uuid
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.database import get_db
+from app.models.task import TaskRecord
+from app.schemas.task import TaskRecordCreate, TaskRecordResponse
+
+router = APIRouter(prefix="/records", tags=["任务记录"])
+
+
+async def _get_record_or_404(db: AsyncSession, record_id: int) -> TaskRecord:
+    result = await db.execute(select(TaskRecord).where(TaskRecord.id == record_id))
+    record = result.scalar_one_or_none()
+    if not record:
+        raise HTTPException(status_code=404, detail=f"记录不存在: {record_id}")
+    return record
+
+
+@router.put("/{record_id}", response_model=TaskRecordResponse)
+async def update_record(
+    record_id: int,
+    data: TaskRecordCreate,
+    db: AsyncSession = Depends(get_db),
+):
+    """更新任务记录（备注+图片）"""
+    record = await _get_record_or_404(db, record_id)
+    record.remark = data.remark or None
+    record.images = json.dumps(data.images) if data.images else None
+    await db.commit()
+    await db.refresh(record)
+    # 手动反序列化 images
+    return TaskRecordResponse.model_validate(record)
+
+
+@router.delete("/{record_id}")
+async def delete_record(
+    record_id: int,
+    db: AsyncSession = Depends(get_db),
+):
+    """删除任务记录"""
+    record = await _get_record_or_404(db, record_id)
+    await db.delete(record)
+    await db.commit()
+    return {"message": "记录已删除"}