修改了登录功能，保证后台服务正常启动后，才能正常登录。

backend/app.py

@@ -242,81 +242,61 @@ def api_health_check():
 @app.route('/api/auth/login', methods=['POST'])
 def login():
     """用户登录"""
-    max_retries = 3
+    try:
-    retry_delay = 1  # 1秒延迟
+        data = flask_request.get_json()
+        username = data.get('username')
+        password = data.get('password')
+        if not username or not password:
+            return jsonify({
+                'success': False,
+                'message': '用户名或密码不能为空'
+            }), 400
 
-    for attempt in range(max_retries):
+        # 使用数据库验证用户
-        try:
+        user = db_manager.authenticate_user(username, password)
-            data = flask_request.get_json()
+        
-            username = data.get('username')
+        if user:
-            password = data.get('password')
+            # 检查用户是否已激活
-            if not username or not password:
+            if not user['is_active']:
                 return jsonify({
                     'success': False,
-                    'message': '用户名或密码不能为空'
+                    'message': '账户未激活，请联系管理员审核'
-                }), 400
+                }), 403
             
-            # 使用数据库验证用户
+            # 构建用户数据
-            user = db_manager.authenticate_user(username, password)
+            user_data = {
+                'id': user['id'],
+                'username': user['username'],
+                'name': user['name'],
+                'role': 'admin' if user['user_type'] == 'admin' else 'user',
+                'user_type': user['user_type'],
+                'avatar': ''
+            }
             
-            if user:
+            # 生成token（实际项目中应使用JWT等安全token）
-                # 检查用户是否已激活
+            token = f"token_{username}_{int(time.time())}"
-                if not user['is_active']:
-                    return jsonify({
-                        'success': False,
-                        'message': '账户未激活，请联系管理员审核'
-                    }), 403
             
-                # 构建用户数据
+            logger.info(f'用户 {username} 登录成功')
-                user_data = {
-                    'id': user['id'],
-                    'username': user['username'],
-                    'name': user['name'],
-                    'role': 'admin' if user['user_type'] == 'admin' else 'user',
-                    'user_type': user['user_type'],
-                    'avatar': ''
-                }
             
-                # 生成token（实际项目中应使用JWT等安全token）
+            return jsonify({
-                token = f"token_{username}_{int(time.time())}"
+                'success': True,
+                'data': {
+                    'token': token,
+                    'user': user_data
+                },
+                'message': '登录成功'
+            })
+        else:
+            logger.warning(f'用户 {username} 登录失败：用户名或密码错误')
+            return jsonify({
+                'success': False,
+                'message': '用户名或密码错误'
+            }), 401
             
-                logger.info(f'用户 {username} 登录成功')
+    except Exception as e:
+        logger.error(f'登录失败: {e}')
+        return jsonify({'success': False, 'message': '登录失败'}), 500
    
-                return jsonify({
-                    'success': True,
-                    'data': {
-                        'token': token,
-                        'user': user_data
-                    },
-                    'message': '登录成功'
-                })
-            else:
-                logger.warning(f'用户 {username} 登录失败：用户名或密码错误')
-                return jsonify({
-                    'success': False,
-                    'message': '用户名或密码错误'
-                }), 401
-                
-        except Exception as e:
-            logger.error(f'登录失败 (尝试 {attempt + 1}/{max_retries}): {e}')
-            
-            # 如果是最后一次尝试，直接返回错误
-            if attempt == max_retries - 1:
-                logger.error(f'登录失败，已达到最大重试次数 ({max_retries})')
-                return jsonify({
-                    'success': False, 
-                    'message': '系统异常，请稍后重试'
-                }), 500
-            
-            # 延迟后重试
-            logger.info(f'等待 {retry_delay} 秒后重试...')
-            time.sleep(retry_delay)
-    
-    # 理论上不会执行到这里，但为了安全起见
-    return jsonify({
-        'success': False, 
-        'message': '系统异常，请稍后重试'
-    }), 500
 
 @app.route('/api/auth/register', methods=['POST'])
 def register():

backend/devices/camera_manager.py

@@ -64,7 +64,7 @@ class CameraManager(BaseDevice):
         self.backend_name = backend_name
 
         # 额外可调的降采样宽度（不改变外部配置语义，仅内部优化传输）
-        self._tx_max_width = int(config.get('tx_max_width', 640))
+        self._tx_max_width = int(config.get('tx_max_width', 1920))
         
         # 流控制
         self.streaming_thread = None
@@ -862,7 +862,7 @@ class CameraManager(BaseDevice):
             self.fps = config.get('fps', 30)
             self.buffer_size = config.get('buffer_size', 1)
             self.fourcc = config.get('fourcc', 'MJPG')
-            self._tx_max_width = int(config.get('tx_max_width', 640))
+            self._tx_max_width = int(config.get('tx_max_width', 1920))
             # 新增：动态更新重连/阈值配置
             self.max_reconnect_attempts = int(config.get('max_reconnect_attempts', self.max_reconnect_attempts))
             self.reconnect_delay = float(config.get('reconnect_delay', self.reconnect_delay))

frontend/src/renderer/src/views/Detection.vue

@@ -565,7 +565,7 @@
        <HistoryDashboard v-if="historyDialogVisible" :patientId="patientId"/>
     </el-dialog>
     <div v-if="isBig" style="position: fixed;top: 0;right: 0;
-    width: 70%;height: 100vh;z-index: 9999;background: red;border: 2px solid #b0b0b0">
+    width: 100%;height: 100vh;z-index: 9999;background: red;border: 2px solid #b0b0b0">
     <svg @click="isBig=false" style="position: absolute;right: 10px;top:10px;cursor: pointer;" t="1760175800150" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5743" width="24" height="24"><path d="M796 163.1L511.1 448l-285-285-63.9 64 285 285-285 285 63.8 63.8 285-285 285 285 63.8-63.8-285-285 285-285-63.8-63.9z" fill="#ffffff" p-id="5744"></path></svg>
       <img v-if="isBig" :src="(cameraStatus === '已连接' && rtspImgSrc) ? rtspImgSrc : noImageSvg" alt=""
         style="width: 100%;height: calc(100%);object-fit:contain;background:#323232;" />

frontend/src/renderer/src/views/Login.vue

@@ -56,7 +56,7 @@
 
           <!-- 操作按钮 -->
           <div class="button-group">
-            <el-button type="primary" class="login-btn" @click="handleLogin" :loading="isLoading">登录</el-button>
+            <el-button type="primary" class="login-btn" @click="handleLogin" :loading="isLoading">{{ isLoading ? '登录中...' : '登录' }}</el-button>
             <el-button class="register-btn" @click="switchToRegister">注册</el-button>
           </div>
         </el-form>
@@ -217,7 +217,7 @@ import { useAuthStore } from '../stores'
 import { User, Lock, View, Hide, Phone } from '@element-plus/icons-vue'
 
 import bg from '@/assets/bg.png'
-import { getBackendUrl } from '../services/api.js'
+import { getBackendUrl,systemAPI } from '../services/api.js'
 const BACKEND_URL = getBackendUrl()
 const router = useRouter()
 const authStore = useAuthStore()
@@ -415,6 +415,7 @@ const handleRegisterSubmit = async () => {
 
 // 登录处理
 const handleLogin = async () => {
+  isLoading.value = true
   // 验证用户名
   if (!form.value.account) {
     showError('请输入登录账号！')
@@ -427,8 +428,34 @@ const handleLogin = async () => {
     return
   }
   
-  try {
+  // 网络访问测试（最多重试3次，每次延迟2秒）
-    isLoading.value = true
+  let healthOk = false
+  for (let attempt = 1; attempt <= 3; attempt++) {
+    try {
+      const result = await systemAPI.health()      
+      if (result && result.status === 'healthy') {
+        healthOk = true
+        break
+      } else {
+        // 后台返回非 healthy 状态
+        if (attempt === 3) {
+          showError('后台服务异常，请稍后重试！')
+          return
+        }
+        await new Promise(resolve => setTimeout(resolve, 2000))
+      }
+    } catch (error) {
+      // 捕获异常，等待后重试
+      if (attempt === 3) {
+        showError('网络访问失败，请检查连接后重试！')
+        isLoading.value = false
+        return
+      }
+      await new Promise(resolve => setTimeout(resolve, 2000))
+    }
+  }
+
+    try {    
     const result = await authStore.login({
       username: form.value.account,
       password: form.value.password      
@@ -455,6 +482,7 @@ const handleLogin = async () => {
     }
   } catch (error) {
     showError('登录失败，请检查网络连接后重试！')
+    isLoading.value = false
   } finally {
     isLoading.value = false
   }