更新 GitHub Actions 工作流，统一使用 ubuntu-24.04 作为运行环境；新增发布 WebUI 产物的工作流

src/webui/webui_server.py

@@ -1,23 +1,44 @@
 """独立的 WebUI 服务器 - 运行在 0.0.0.0:8001"""
 
-import asyncio
 from uvicorn import Config, Server as UvicornServer
+
+import asyncio
+
 from src.common.logger import get_logger
+from src.config.config import config_manager
 from src.webui.app import create_app, show_access_token
 
 logger = get_logger("webui_server")
 
 
+class _ASGIProxy:
+    def __init__(self, app):
+        self._app = app
+
+    def set_app(self, app) -> None:
+        self._app = app
+
+    async def __call__(self, scope, receive, send):
+        await self._app(scope, receive, send)
+
+
 class WebUIServer:
     """独立的 WebUI 服务器"""
 
     def __init__(self, host: str = "0.0.0.0", port: int = 8001):
         self.host = host
         self.port = port
-        self.app = create_app(host=host, port=port, enable_static=True)
+        self._app = create_app(host=host, port=port, enable_static=True)
+        self.app = _ASGIProxy(self._app)
         self._server = None
 
         show_access_token()
+        config_manager.register_reload_callback(self.reload_app)
+
+    async def reload_app(self) -> None:
+        self._app = create_app(host=self.host, port=self.port, enable_static=True)
+        self.app.set_app(self._app)
+        logger.info("WebUI 应用已热重载")
 
     async def start(self):
         """启动服务器"""
@@ -71,6 +92,8 @@ class WebUIServer:
         except Exception as e:
             logger.error(f"❌ WebUI 服务器运行错误: {e}", exc_info=True)
             raise
+        finally:
+            config_manager.unregister_reload_callback(self.reload_app)
 
     def _check_port_available(self) -> bool:
         """检查端口是否可用（支持 IPv4 和 IPv6）"""