feat(mining-app): 找回密码页自动预填登录页的手机号

从登录页跳转至找回密码时，通过 go_router extra 传递手机号，
确保用户无需重新输入，且与数据库记录 100% 一致。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/mining-app/lib/core/router/app_router.dart

@@ -111,7 +111,7 @@ final appRouterProvider = Provider<GoRouter>((ref) {
       ),
       GoRoute(
         path: Routes.forgotPassword,
-        builder: (context, state) => const ForgotPasswordPage(),
+        builder: (context, state) => ForgotPasswordPage(initialPhone: state.extra as String?),
       ),
       GoRoute(
         path: Routes.changePassword,

frontend/mining-app/lib/presentation/pages/auth/forgot_password_page.dart

@@ -7,7 +7,9 @@ import '../../../core/error/exceptions.dart';
 import '../../providers/user_providers.dart';
 
 class ForgotPasswordPage extends ConsumerStatefulWidget {
-  const ForgotPasswordPage({super.key});
+  final String? initialPhone;
+
+  const ForgotPasswordPage({super.key, this.initialPhone});
 
   @override
   ConsumerState<ForgotPasswordPage> createState() => _ForgotPasswordPageState();
@@ -25,6 +27,15 @@ class _ForgotPasswordPageState extends ConsumerState<ForgotPasswordPage> {
   int _countDown = 0;
   bool _sendingSms = false;
 
+  @override
+  void initState() {
+    super.initState();
+    final phone = widget.initialPhone;
+    if (phone != null && phone.isNotEmpty) {
+      _phoneController.text = phone;
+    }
+  }
+
   @override
   void dispose() {
     _phoneController.dispose();

frontend/mining-app/lib/presentation/pages/auth/login_page.dart

@@ -70,7 +70,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
               ElevatedButton(
                 onPressed: () {
                   Navigator.pop(ctx);
-                  context.push(Routes.forgotPassword);
+                  context.push(Routes.forgotPassword, extra: _phoneController.text.trim());
                 },
                 style: ElevatedButton.styleFrom(backgroundColor: _orange),
                 child: const Text('找回密码', style: TextStyle(color: Colors.white)),
@@ -88,7 +88,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
             action: SnackBarAction(
               label: '找回密码',
               textColor: Colors.white,
-              onPressed: () => context.push(Routes.forgotPassword),
+              onPressed: () => context.push(Routes.forgotPassword, extra: _phoneController.text.trim()),
             ),
           ),
         );
@@ -280,7 +280,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                 Align(
                   alignment: Alignment.centerRight,
                   child: TextButton(
-                    onPressed: () => context.push(Routes.forgotPassword),
+                    onPressed: () => context.push(Routes.forgotPassword, extra: _phoneController.text.trim()),
                     child: Text(
                       '忘记密码？',
                       style: TextStyle(color: AppColors.textSecondaryOf(context)),