fix: preserve live tasks during daemon recovery

apps/admin_console/server.py

@@ -24,6 +24,7 @@ import os
 from pathlib import Path
 import secrets
 import signal
+import socket
 import sys
 from types import FrameType
 
@@ -421,6 +422,14 @@ queue_goals = state.queue_goals
 class ArtemisUvicornServer(uvicorn.Server):
     """Notify application streams before Uvicorn waits for them to close."""
 
+    async def startup(self, sockets: list[socket.socket] | None = None) -> None:
+        # Reload workers start in a fresh interpreter; restore the actual bind
+        # address there before lifespan publishes runtime metadata.
+        state.host = self.config.host
+        state.port = self.config.port
+        app.state.uvicorn_server = self
+        await super().startup(sockets=sockets)
+
     @staticmethod
     def _task_is_active() -> bool:
         """Check task state without doing process I/O from a signal handler."""
@@ -470,31 +479,40 @@ class ArtemisUvicornServer(uvicorn.Server):
 
 def run_ui_server(host: str, port: int, reload: bool = False) -> None:
     """Run the UI server with bounded, signal-aware graceful shutdown."""
+    # Reserve a listening socket before publishing metadata or running lifespan.
+    # Uvicorn normally runs application startup *before* binding its port; a
+    # duplicate daemon would otherwise recover jobs owned by the real server.
+    family = socket.AF_INET6 if ":" in host else socket.AF_INET
+    try:
+        listener = socket.create_server((host, port), family=family)
+    except OSError as exc:
+        print(f"无法启动服务：{host}:{port} 端口不可用（{exc}）。现有服务和任务保持不变。")
+        raise SystemExit(1) from exc
+    listener.set_inheritable(True)
+    port = listener.getsockname()[1]
     state.host = host
     state.port = port
-    write_server_info(port=port, host=host, lifecycle_token=LIFECYCLE_TOKEN)
 
     try:
-        if reload:
-            uvicorn.run(
-                "apps.admin_console.server:app",
-                host=host,
-                port=port,
-                reload=True,
-                timeout_graceful_shutdown=5,
-            )
-            return
-
         config = uvicorn.Config(
-            app,
+            "apps.admin_console.server:app" if reload else app,
             host=host,
             port=port,
+            reload=reload,
             timeout_graceful_shutdown=5,
         )
+        if reload:
+            from uvicorn.supervisors import ChangeReload
+
+            server = ArtemisUvicornServer(config)
+            ChangeReload(config, target=server.run, sockets=[listener]).run()
+            return
+
         server = ArtemisUvicornServer(config)
         app.state.uvicorn_server = server
-        server.run()
+        server.run(sockets=[listener])
     finally:
+        listener.close()
         app.state.uvicorn_server = None
         clear_server_info(port=port, lifecycle_token=LIFECYCLE_TOKEN)