修复工作人员端令牌失效后的登录恢复

apps/service_app/lib/ui/features/preflight/preflight_page.dart

@@ -1,8 +1,11 @@
+// 功能描述：展示工作人员作业准入检查，并安全处理刷新和会话失效。
+// 版本：1.1.0
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 
 import '../../../app/dependencies.dart';
 import '../../../data/repositories/service_repository.dart';
+import '../../../data/services/api_client.dart';
 import '../../../domain/models/service_models.dart';
 import '../../core/widgets.dart';
 
@@ -26,11 +29,21 @@ class _PreflightPageState extends State<PreflightPage> {
     _future = widget.repository.preflight();
   }
 
+  /// 创建新的加载任务，并在同步状态回调中替换页面 Future。
+  void _reload() {
+    final future = widget.repository.preflight();
+    setState(() {
+      _future = future;
+    });
+  }
+
   Future<void> _attendance(String action) async {
     setState(() => _busy = true);
     try {
       await widget.repository.attendance(action, widget.session.deviceIdentity);
-      setState(() => _future = widget.repository.preflight());
+      if (mounted) _reload();
+    } on SessionExpiredException {
+      return;
     } catch (error) {
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(error.toString())));
@@ -48,10 +61,13 @@ class _PreflightPageState extends State<PreflightPage> {
       builder: (context, snapshot) {
         if (!snapshot.hasData) {
           if (snapshot.hasError) {
+            if (snapshot.error is SessionExpiredException) {
+              return const Center(child: CircularProgressIndicator());
+            }
             return MessageState(
               title: '作业检查加载失败',
               description: '请检查网络后重新加载',
-              onRetry: () => setState(() => _future = widget.repository.preflight()),
+              onRetry: _reload,
             );
           }
           return const Center(child: CircularProgressIndicator());