增加设备私有配置，每台设备可以配置不同的模型和提示词

增加后台管理功能，可以通过后台调整设备私有配置信息

manager/api/login.py

@@ -0,0 +1,49 @@
+import logging
+from aiohttp import web
+import datetime
+
+logger = logging.getLogger(__name__)
+
+class LoginHandler:
+    def __init__(self, config):
+        self.config = config
+
+    async def handle_login(self, request):
+        """处理登录请求"""
+        try:
+            data = await request.json()
+            username = data.get('username')
+            password = data.get('password')
+
+            if not username or not password:
+                logger.warning(f"Login attempt with empty credentials from {request.remote}")
+                return web.json_response({
+                    'success': False, 
+                    'message': '用户名和密码不能为空'
+                })
+
+            stored_user = self.config['get_user'](username)
+            if not stored_user or stored_user['password'] != self.config['hash_password'](password):
+                logger.warning(f"Failed login attempt for user {username} from {request.remote}")
+                return web.json_response({
+                    'success': False, 
+                    'message': '用户名或密码错误'
+                })
+
+            # 更新最后登录时间
+            self.config['update_user'](username, {
+                'last_login': datetime.datetime.now().isoformat()
+            })
+
+            logger.info(f"Successful login for user {username} from {request.remote}")
+            return web.json_response({
+                'success': True, 
+                'message': '登录成功'
+            })
+
+        except Exception as e:
+            logger.error(f"Login error: {str(e)}", exc_info=True)
+            return web.json_response({
+                'success': False, 
+                'message': '登录失败，请稍后重试'
+            })