修复用户端令牌失效后的登录恢复

apps/user_app/lib/ui/features/auth/login_page.dart

@@ -3,14 +3,22 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 
+import '../../../app/auth_navigation.dart';
 import '../../../app/dependencies.dart';
 import '../../../data/services/api_client.dart';
 
 /// 用户端手机号密码登录页面。
 class LoginPage extends StatefulWidget {
-  const LoginPage({required this.session, super.key});
+  const LoginPage({
+    required this.session,
+    this.redirectTarget,
+    this.showSessionExpiredMessage = false,
+    super.key,
+  });
 
   final UserSession session;
+  final String? redirectTarget;
+  final bool showSessionExpiredMessage;
 
   @override
   State<LoginPage> createState() => _LoginPageState();
@@ -27,6 +35,14 @@ class _LoginPageState extends State<LoginPage> {
   String? _phoneError;
   bool _obscurePassword = true;
 
+  @override
+  void initState() {
+    super.initState();
+    if (widget.showSessionExpiredMessage) {
+      _error = '登录状态已失效，请重新登录';
+    }
+  }
+
   @override
   void dispose() {
     _phone.dispose();
@@ -174,7 +190,13 @@ class _LoginPageState extends State<LoginPage> {
                       : const Text('安全登录'),
                 ),
                 TextButton(
-                  onPressed: () => context.push('/register'),
+                  onPressed: () => context.push(
+                    buildAuthLocation(
+                      '/register',
+                      redirectTarget: widget.redirectTarget,
+                      sessionExpired: widget.showSessionExpiredMessage,
+                    ),
+                  ),
                   child: const Text('首次使用？注册账号'),
                 ),
                 const SizedBox(height: 8),

apps/user_app/lib/ui/features/auth/register_page.dart

@@ -1,12 +1,24 @@
+// 功能描述：提供用户注册流程，并在注册后保留原登录目标页。
+// 版本：1.1.0
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 
+import '../../../app/auth_navigation.dart';
 import '../../../app/dependencies.dart';
 import '../../../data/services/api_client.dart';
 
+/// 用户端账号注册页面。
 class RegisterPage extends StatefulWidget {
-  const RegisterPage({required this.session, super.key});
+  const RegisterPage({
+    required this.session,
+    this.redirectTarget,
+    this.showSessionExpiredMessage = false,
+    super.key,
+  });
 
   final UserSession session;
+  final String? redirectTarget;
+  final bool showSessionExpiredMessage;
 
   @override
   State<RegisterPage> createState() => _RegisterPageState();
@@ -51,7 +63,19 @@ class _RegisterPageState extends State<RegisterPage> {
           'request_identity': _requestIdentity,
         },
       );
-      if (mounted) Navigator.of(context).pop();
+      if (mounted) {
+        if (Navigator.of(context).canPop()) {
+          Navigator.of(context).pop();
+        } else {
+          context.go(
+            buildAuthLocation(
+              '/login',
+              redirectTarget: widget.redirectTarget,
+              sessionExpired: widget.showSessionExpiredMessage,
+            ),
+          );
+        }
+      }
     } catch (error) {
       if (mounted) setState(() => _message = error.toString());
     } finally {