feat(tasks): 运营端任务详情/竞标/报名端点 + 园区发布任务端点

- 运营端 /admin/tasks/{id} 详情、/{id}/bids、/{id}/claims、/{id}/bids/{bid_id}/win 开标定标(余标置lost+进 in_progress)
- 园区端 POST /park/api/park/tasks 发布任务(publisher_role=park/park_id=本园/发布即上架/默认公有)

app/api/routers/rbac_operator.py

@@ -75,6 +75,59 @@ async def operator_escrow_release(
     return released
 
 
+@router.get("/tasks/{task_id}", summary="任务详情")
+async def get_task_detail(
+    task_id: str,
+    db: Database = Depends(get_db),
+    _u: dict = Depends(require_roles("operator")),
+):
+    task = await db.tasks.get(task_id)
+    if task is None:
+        raise HTTPException(status_code=404, detail="任务不存在")
+    return task
+
+
+@router.get("/tasks/{task_id}/bids", summary="任务竞标（报名/投标情况）")
+async def get_task_bids(
+    task_id: str,
+    db: Database = Depends(get_db),
+    _u: dict = Depends(require_roles("operator")),
+):
+    return {"items": await db.bids.list_for_task(task_id)}
+
+
+@router.get("/tasks/{task_id}/claims", summary="任务报名/接单情况（抢单/指派/推荐）")
+async def get_task_claims(
+    task_id: str,
+    db: Database = Depends(get_db),
+    _u: dict = Depends(require_roles("operator")),
+):
+    return {"items": await db.task_claims.list_by_task(task_id)}
+
+
+@router.post("/tasks/{task_id}/bids/{bid_id}/win", summary="开标/定标（选定中标 OPC）")
+async def operator_win_bid(
+    task_id: str,
+    bid_id: str,
+    request: Request,
+    db: Database = Depends(get_db),
+    _u: dict = Depends(require_roles("operator")),
+):
+    from ...services.task_service import TaskService
+
+    bid = await db.bids.set_status(bid_id, "win")
+    if bid is None:
+        raise HTTPException(status_code=404, detail="竞标不存在")
+    # 其余标置为 lost
+    for b in await db.bids.list_for_task(task_id):
+        if b["id"] != bid_id and b.get("status") == "submitted":
+            await db.bids.set_status(b["id"], "lost")
+    await db.tasks.set_status(task_id, "in_progress")
+    await write_audit(db, action="bid.win", resource="bid", resource_id=bid_id,
+                      detail=f"task={task_id} winner={bid.get('opc_name')}", user=_u, request=request)
+    return bid
+
+
 @router.get("/tasks", summary="任务列表")
 async def list_tasks(
     status: str | None = None,