feat: 蓝牙血压计BLE数据同步 + 设备管理页重构 + 健康记录滑动删除 + 医生端合并设计文档

- BLE: 修复Omron设备Indication模式连接(先订阅后配CCCD + forceIndications) + 直连重连
- BLE: 设备断连实时检测(connectionState流→Provider→UI)
- 修复: 血压数据上报后端枚举不匹配(Device→DeviceSync)导致500
- 新增: DELETE /api/health-records/{id} 后端接口
- 设备管理页: 白色主题重设计 + 直连重连 + 实时状态 + Toast通知
- 设备扫描页: 白色主题 + 扫描动画居中 + 已连接等待页面
- 健康记录: 左滑删除(Dismissible) + 同时清理_allRecords和_filtered
- 导航: 修复自定义路由栈下Navigator.pop黑屏bug
- 文档: 医生端合并App完整设计文档(已确认版)

health_app/lib/pages/remaining_pages.dart

@@ -864,9 +864,9 @@ class StaticTextPage extends ConsumerWidget {
   }
 }
 
-/// 血压计设备管理（已绑定/未绑定）
-class DeviceManagementPage extends ConsumerWidget {
-  const DeviceManagementPage({super.key});
+/// 旧版设备管理页，已移至 device/device_management_page.dart
+class _DeviceManagementPageLegacy extends ConsumerWidget {
+  const _DeviceManagementPageLegacy({super.key});
 
   @override Widget build(BuildContext context, WidgetRef ref) {
     final device = ref.watch(omronDeviceProvider);
@@ -930,12 +930,28 @@ class DeviceManagementPage extends ConsumerWidget {
           Container(
             width: 72, height: 72,
             decoration: BoxDecoration(
-              gradient: AppColors.primaryGradient,
+              gradient: device.isConnected ? AppColors.primaryGradient : const LinearGradient(colors: [Color(0xFF9CA3AF), Color(0xFF6B7280)]),
               borderRadius: BorderRadius.circular(AppTheme.rMd),
             ),
-            child: const Icon(Icons.bluetooth_connected, size: 36, color: Colors.white),
+            child: Icon(
+              device.isConnected ? Icons.bluetooth_connected : Icons.bluetooth_disabled,
+              size: 36, color: Colors.white,
+            ),
           ),
-          const SizedBox(height: 16),
+          const SizedBox(height: 8),
+          Container(
+            padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
+            decoration: BoxDecoration(
+              color: device.isConnected ? const Color(0xFFD1FAE5) : const Color(0xFFFEE2E2),
+              borderRadius: BorderRadius.circular(12),
+            ),
+            child: Text(
+              device.isConnected ? '已连接' : '未连接',
+              style: TextStyle(fontSize: 13, fontWeight: FontWeight.w600,
+                color: device.isConnected ? const Color(0xFF059669) : const Color(0xFFDC2626)),
+            ),
+          ),
+          const SizedBox(height: 12),
           Text(device.name ?? '血压计', style: const TextStyle(fontSize: 22, fontWeight: FontWeight.w700, color: AppColors.textPrimary)),
           const SizedBox(height: 6),
           Text('MAC: ${device.mac ?? '—'}', style: const TextStyle(fontSize: 14, color: AppColors.textHint)),
@@ -944,12 +960,45 @@ class DeviceManagementPage extends ConsumerWidget {
             Text('上次同步: ${device.lastSync}', style: const TextStyle(fontSize: 13, color: AppColors.textHint)),
           ],
           const SizedBox(height: 24),
-          Row(children: [
-            Expanded(
+          if (device.isConnected) ...[
+            // 已连接：显示断开和解绑
+            Row(children: [
+              Expanded(
+                child: OutlinedButton.icon(
+                  onPressed: () => _unbind(context, ref),
+                  icon: const Icon(Icons.delete_outline, size: 18, color: AppColors.error),
+                  label: const Text('解绑', style: TextStyle(color: AppColors.error)),
+                  style: OutlinedButton.styleFrom(
+                    side: const BorderSide(color: AppColors.error),
+                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(AppTheme.rMd)),
+                    padding: const EdgeInsets.symmetric(vertical: 14),
+                  ),
+                ),
+              ),
+            ]),
+          ] else ...[
+            // 未连接：显示重新连接和解绑
+            SizedBox(
+              width: double.infinity,
+              height: 52,
+              child: ElevatedButton.icon(
+                onPressed: () => pushRoute(ref, 'deviceScan'),
+                icon: const Icon(Icons.bluetooth_searching, size: 20),
+                label: const Text('重新连接设备', style: TextStyle(fontSize: 17, fontWeight: FontWeight.w600)),
+                style: ElevatedButton.styleFrom(
+                  backgroundColor: AppColors.primary,
+                  foregroundColor: Colors.white,
+                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(AppTheme.rMd)),
+                ),
+              ),
+            ),
+            const SizedBox(height: 12),
+            SizedBox(
+              width: double.infinity,
               child: OutlinedButton.icon(
                 onPressed: () => _unbind(context, ref),
                 icon: const Icon(Icons.delete_outline, size: 18, color: AppColors.error),
-                label: const Text('解绑', style: TextStyle(color: AppColors.error)),
+                label: const Text('解绑设备', style: TextStyle(color: AppColors.error)),
                 style: OutlinedButton.styleFrom(
                   side: const BorderSide(color: AppColors.error),
                   shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(AppTheme.rMd)),
@@ -957,21 +1006,7 @@ class DeviceManagementPage extends ConsumerWidget {
                 ),
               ),
             ),
-            const SizedBox(width: 12),
-            Expanded(
-              child: ElevatedButton.icon(
-                onPressed: () => pushRoute(ref, 'deviceScan'),
-                icon: const Icon(Icons.swap_horiz, size: 18),
-                label: const Text('更换设备'),
-                style: ElevatedButton.styleFrom(
-                  backgroundColor: AppColors.primary,
-                  foregroundColor: Colors.white,
-                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(AppTheme.rMd)),
-                  padding: const EdgeInsets.symmetric(vertical: 14),
-                ),
-              ),
-            ),
-          ]),
+          ],
         ]),
       ),