控制台改为选项卡，并支持封禁节点与下发计算任务。

Co-authored-by: Cursor <cursoragent@cursor.com>

app/services/tasks.py

@@ -18,7 +18,7 @@ from urllib.error import URLError
 from urllib.request import Request, urlopen
 
 from sqlalchemy import select
-from sqlalchemy.orm import Session
+from sqlalchemy.orm import Session, selectinload
 
 from app.clock import utcnow
 from app.config import settings
@@ -28,13 +28,105 @@ from app.services.common import get_node_by_sn
 
 logger = logging.getLogger(__name__)
 
+ADMIN_TASK_TYPES = {
+    "alpha_mining": "量化因子挖掘",
+    "llm_inference": "大模型推理",
+    "lora_training": "QLoRA 微调",
+    "stress_test": "简易压测",
+}
+_BUSY = (TaskStatus.PENDING, TaskStatus.PROCESSING)
+
+
+def create_admin_tasks(
+    session: Session,
+    task_type: str,
+    payload: dict | None,
+    target_node_sn: str | None = None,
+    now: datetime | None = None,
+) -> list[ComputeTask]:
+    """向指定节点或当前全部在线节点各放一条任务。payload 里补上一次性 nonce。"""
+    if task_type not in ADMIN_TASK_TYPES:
+        raise AppError("不支持的任务类型", 400)
+    moment = now or utcnow()
+    body = dict(payload or {})
+    if len(json.dumps(body, ensure_ascii=False)) > 8000:
+        raise AppError("任务参数过长", 400)
+    targets = _dispatch_targets(session, target_node_sn, moment)
+    deadline = moment + timedelta(minutes=settings.task_deadline_minutes)
+    tasks: list[ComputeTask] = []
+    for node in targets:
+        task_payload = dict(body)
+        task_payload["nonce"] = secrets.token_hex(16)
+        task = ComputeTask(
+            id=str(uuid.uuid4()),
+            node_id=node.id,
+            task_type=task_type,
+            payload=task_payload,
+            status=TaskStatus.PENDING,
+            push_status=PushStatus.QUEUED,
+            dispatched_at=moment,
+            deadline_at=deadline,
+        )
+        session.add(task)
+        tasks.append(task)
+    session.flush()
+    for node, task in zip(targets, tasks):
+        _push_task(node, task)
+    session.flush()
+    return tasks
+
+
+def list_admin_tasks(session: Session) -> list[ComputeTask]:
+    return list(
+        session.scalars(
+            select(ComputeTask)
+            .options(selectinload(ComputeTask.node))
+            .order_by(ComputeTask.dispatched_at.desc(), ComputeTask.id.desc())
+        ).all()
+    )
+
+
+def result_preview(result: dict | None) -> str:
+    if not result:
+        return ""
+    for key in ("formula", "alpha", "output", "summary"):
+        value = result.get(key)
+        if isinstance(value, str) and value.strip():
+            return value.strip()[:120]
+    for key in ("patch_bytes", "patch_size", "adapter_bytes"):
+        if result.get(key) is not None:
+            return f"补丁 {result[key]}"
+    text = json.dumps(result, ensure_ascii=False)
+    return text if len(text) <= 120 else text[:117] + "..."
+
+
+def _dispatch_targets(session: Session, target_node_sn: str | None, moment: datetime) -> list[ComputeNode]:
+    sn = (target_node_sn or "").strip()
+    if sn:
+        node = get_node_by_sn(session, sn)
+        if node.is_banned:
+            raise AppError("节点已封禁，不能下发任务", 409)
+        if node.license_expires_at <= moment:
+            raise AppError("节点授权已到期，不能下发任务", 409)
+        return [node]
+    nodes = session.scalars(
+        select(ComputeNode).where(
+            ComputeNode.status == NodeStatus.ONLINE,
+            ComputeNode.license_expires_at > moment,
+            ComputeNode.is_banned.is_(False),
+        )
+    ).all()
+    if not nodes:
+        raise AppError("当前没有可下发的在线节点", 409)
+    return list(nodes)
+
 
 def dispatch_random_tasks(session: Session, now: datetime | None = None) -> list[ComputeTask]:
     """向当前在线、授权仍有效、且没有未完成任务的节点随机下发一轮任务。"""
     moment = now or utcnow()
     expire_overdue_tasks(session, moment)
     pending_node_ids = set(
-        session.scalars(select(ComputeTask.node_id).where(ComputeTask.status == TaskStatus.PENDING)).all()
+        session.scalars(select(ComputeTask.node_id).where(ComputeTask.status.in_(_BUSY))).all()
     )
     candidates = [
         node
@@ -90,6 +182,7 @@ def list_pending_tasks(session: Session, sn: str, now: datetime | None = None) -
         if task.deadline_at < moment:
             task.status = TaskStatus.EXPIRED
             continue
+        task.status = TaskStatus.PROCESSING
         visible.append(task)
     session.flush()
     return visible
@@ -102,6 +195,7 @@ def report_task(
     success: bool,
     nonce: str,
     now: datetime | None = None,
+    result: dict | None = None,
 ) -> ComputeTask:
     """校验任务归属、时限和 nonce。只有校验通过且 success 为真才记为有效响应。"""
     moment = now or utcnow()
@@ -111,7 +205,7 @@ def report_task(
         raise AppError("任务不存在", 404)
     if task.node_id != node.id:
         raise AppError("任务不属于该节点", 403)
-    if task.status != TaskStatus.PENDING:
+    if task.status not in _BUSY:
         raise AppError("任务已结束，不能重复回传", 409)
     if task.deadline_at < moment:
         task.status = TaskStatus.EXPIRED
@@ -124,6 +218,7 @@ def report_task(
 
     task.responded_at = moment
     task.success = success
+    task.result = result or None
     task.status = TaskStatus.COMPLETED if success else TaskStatus.FAILED
     session.flush()
     return task
@@ -133,7 +228,7 @@ def expire_overdue_tasks(session: Session, now: datetime | None = None) -> int:
     moment = now or utcnow()
     tasks = session.scalars(
         select(ComputeTask).where(
-            ComputeTask.status == TaskStatus.PENDING,
+            ComputeTask.status.in_(_BUSY),
             ComputeTask.deadline_at < moment,
         )
     ).all()