feat(apps): integrate auth cubits with register and login screens

apps/lib/features/auth/ui/screens/login_email_screen.dart

@@ -35,7 +35,7 @@ class _LoginEmailScreenState extends State<LoginEmailScreen> {
     setState(() {
       _showWarning = false;
     });
-    context.push('/login/password');
+    context.push('/login/password', extra: _emailController.text);
   }
 
   @override

apps/lib/features/auth/ui/screens/login_password_screen.dart

@@ -1,25 +1,78 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:formz/formz.dart';
 import 'package:go_router/go_router.dart';
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_button.dart';
+import '../../../../shared/widgets/warning_banner.dart';
+import '../../presentation/cubits/login_cubit.dart';
+import '../../presentation/bloc/auth_bloc.dart';
+import '../../presentation/bloc/auth_event.dart';
+import '../../data/auth_repository.dart';
 
-class LoginPasswordScreen extends StatefulWidget {
-  const LoginPasswordScreen({super.key});
+class LoginPasswordScreen extends StatelessWidget {
+  final String? email;
+
+  const LoginPasswordScreen({super.key, this.email});
 
   @override
-  State<LoginPasswordScreen> createState() => _LoginPasswordScreenState();
+  Widget build(BuildContext context) {
+    final emailFromExtra = GoRouterState.of(context).extra as String?;
+    final initialEmail = email ?? emailFromExtra ?? '';
+
+    return BlocProvider(
+      create: (context) {
+        final cubit = LoginCubit(context.read<AuthRepository>());
+        if (initialEmail.isNotEmpty) {
+          cubit.emailChanged(initialEmail);
+        }
+        return cubit;
+      },
+      child: LoginPasswordView(initialEmail: initialEmail),
+    );
+  }
 }
 
-class _LoginPasswordScreenState extends State<LoginPasswordScreen> {
-  final _passwordController = TextEditingController();
+class LoginPasswordView extends StatefulWidget {
+  final String initialEmail;
+
+  const LoginPasswordView({super.key, required this.initialEmail});
+
+  @override
+  State<LoginPasswordView> createState() => _LoginPasswordViewState();
+}
+
+class _LoginPasswordViewState extends State<LoginPasswordView> {
+  late final TextEditingController _passwordController;
   bool _obscureText = true;
 
+  @override
+  void initState() {
+    super.initState();
+    _passwordController = TextEditingController();
+  }
+
   @override
   void dispose() {
     _passwordController.dispose();
     super.dispose();
   }
 
+  Future<void> _handleLogin() async {
+    final cubit = context.read<LoginCubit>();
+    cubit.passwordChanged(_passwordController.text);
+
+    if (!cubit.state.isValid) {
+      return;
+    }
+
+    final response = await cubit.submit();
+    if (response != null && mounted) {
+      context.read<AuthBloc>().add(AuthLoggedIn(user: response.user));
+      context.go('/home');
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -92,54 +145,62 @@ class _LoginPasswordScreenState extends State<LoginPasswordScreen> {
   }
 
   Widget _buildFormContainer() {
-    return SizedBox(
-      width: 327,
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.stretch,
-        children: [
-          Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
+    return BlocBuilder<LoginCubit, LoginState>(
+      builder: (context, state) {
+        return SizedBox(
+          width: 327,
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
             children: [
-              const Text(
-                '密码',
-                style: TextStyle(
-                  fontSize: 13,
-                  fontWeight: FontWeight.w500,
-                  color: Color(0xFF475569),
-                ),
-              ),
-              const SizedBox(height: 6),
-              TextField(
-                controller: _passwordController,
-                obscureText: _obscureText,
-                decoration: InputDecoration(
-                  hintText: '请输入密码',
-                  suffixIcon: IconButton(
-                    icon: Icon(
-                      _obscureText ? Icons.visibility_off : Icons.visibility,
-                      size: 20,
-                      color: AppColors.slate400,
+              Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  const Text(
+                    '密码',
+                    style: TextStyle(
+                      fontSize: 13,
+                      fontWeight: FontWeight.w500,
+                      color: Color(0xFF475569),
                     ),
-                    onPressed: () {
-                      setState(() {
-                        _obscureText = !_obscureText;
-                      });
-                    },
                   ),
-                ),
+                  const SizedBox(height: 6),
+                  TextField(
+                    controller: _passwordController,
+                    obscureText: _obscureText,
+                    decoration: InputDecoration(
+                      hintText: '请输入密码',
+                      suffixIcon: IconButton(
+                        icon: Icon(
+                          _obscureText
+                              ? Icons.visibility_off
+                              : Icons.visibility,
+                          size: 20,
+                          color: AppColors.slate400,
+                        ),
+                        onPressed: () {
+                          setState(() {
+                            _obscureText = !_obscureText;
+                          });
+                        },
+                      ),
+                    ),
+                  ),
+                ],
+              ),
+              const SizedBox(height: 12),
+              if (state.errorMessage != null)
+                WarningBanner(message: state.errorMessage!, visible: true),
+              const SizedBox(height: 12),
+              AppButton(
+                text: '登录',
+                onPressed: state.status == FormzSubmissionStatus.inProgress
+                    ? null
+                    : _handleLogin,
               ),
             ],
           ),
-          const SizedBox(height: 12),
-          AppButton(text: '登录', onPressed: () => context.go('/home')),
-          const SizedBox(height: 12),
-          AppButton(
-            text: '使用验证码登录',
-            isOutlined: true,
-            onPressed: () => context.push('/login/code'),
-          ),
-        ],
-      ),
+        );
+      },
     );
   }
 

apps/lib/features/auth/ui/screens/register_screen.dart

@@ -1,26 +1,62 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:formz/formz.dart';
 import 'package:go_router/go_router.dart';
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_button.dart';
+import '../../../../shared/widgets/warning_banner.dart';
+import '../../presentation/cubits/register_cubit.dart';
+import '../../data/auth_repository.dart';
 
-class RegisterScreen extends StatefulWidget {
+class RegisterScreen extends StatelessWidget {
   const RegisterScreen({super.key});
 
   @override
-  State<RegisterScreen> createState() => _RegisterScreenState();
+  Widget build(BuildContext context) {
+    return BlocProvider(
+      create: (context) => RegisterCubit(context.read<AuthRepository>()),
+      child: const RegisterView(),
+    );
+  }
 }
 
-class _RegisterScreenState extends State<RegisterScreen> {
+class RegisterView extends StatefulWidget {
+  const RegisterView({super.key});
+
+  @override
+  State<RegisterView> createState() => _RegisterViewState();
+}
+
+class _RegisterViewState extends State<RegisterView> {
   final _nicknameController = TextEditingController();
   final _emailController = TextEditingController();
+  final _passwordController = TextEditingController();
+  bool _obscureText = true;
 
   @override
   void dispose() {
     _nicknameController.dispose();
     _emailController.dispose();
+    _passwordController.dispose();
     super.dispose();
   }
 
+  Future<void> _handleNext() async {
+    final cubit = context.read<RegisterCubit>();
+    cubit.usernameChanged(_nicknameController.text);
+    cubit.emailChanged(_emailController.text);
+    cubit.passwordChanged(_passwordController.text);
+
+    if (!cubit.state.isStep1Valid) {
+      return;
+    }
+
+    final success = await cubit.submitStep1();
+    if (success && mounted) {
+      context.push('/register/step2', extra: cubit);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -93,23 +129,39 @@ class _RegisterScreenState extends State<RegisterScreen> {
   }
 
   Widget _buildFormContainer() {
-    return SizedBox(
-      width: 327,
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.stretch,
-        children: [
-          _buildInput('昵称', '请输入昵称', _nicknameController),
-          const SizedBox(height: 12),
-          _buildInput('邮箱', '请输入邮箱', _emailController),
-          const SizedBox(height: 12),
-          _buildStepIndicator(),
-          const SizedBox(height: 12),
-          AppButton(
-            text: '下一步',
-            onPressed: () => context.push('/register/step2'),
+    return BlocBuilder<RegisterCubit, RegisterState>(
+      builder: (context, state) {
+        return SizedBox(
+          width: 327,
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              _buildInput('昵称', '请输入昵称', _nicknameController),
+              const SizedBox(height: 12),
+              _buildInput('邮箱', '请输入邮箱', _emailController),
+              const SizedBox(height: 12),
+              _buildPasswordInput(),
+              const SizedBox(height: 12),
+              _buildStepIndicator(),
+              if (state.errorMessage != null)
+                Padding(
+                  padding: const EdgeInsets.only(top: 8),
+                  child: WarningBanner(
+                    message: state.errorMessage!,
+                    visible: true,
+                  ),
+                ),
+              const SizedBox(height: 12),
+              AppButton(
+                text: '下一步',
+                onPressed: state.status == FormzSubmissionStatus.inProgress
+                    ? null
+                    : _handleNext,
+              ),
+            ],
           ),
-        ],
-      ),
+        );
+      },
     );
   }
 
@@ -138,6 +190,42 @@ class _RegisterScreenState extends State<RegisterScreen> {
     );
   }
 
+  Widget _buildPasswordInput() {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        const Text(
+          '密码',
+          style: TextStyle(
+            fontSize: 13,
+            fontWeight: FontWeight.w500,
+            color: Color(0xFF475569),
+          ),
+        ),
+        const SizedBox(height: 6),
+        TextField(
+          controller: _passwordController,
+          obscureText: _obscureText,
+          decoration: InputDecoration(
+            hintText: '请输入至少 6 位密码',
+            suffixIcon: IconButton(
+              icon: Icon(
+                _obscureText ? Icons.visibility_off : Icons.visibility,
+                size: 20,
+                color: AppColors.slate400,
+              ),
+              onPressed: () {
+                setState(() {
+                  _obscureText = !_obscureText;
+                });
+              },
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+
   Widget _buildStepIndicator() {
     return Row(
       children: [

apps/lib/features/auth/ui/screens/register_step2_screen.dart

@@ -1,29 +1,74 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:go_router/go_router.dart';
+import 'package:formz/formz.dart';
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_button.dart';
+import '../../../../shared/widgets/warning_banner.dart';
+import '../../presentation/cubits/register_cubit.dart';
+import '../../presentation/bloc/auth_bloc.dart';
+import '../../presentation/bloc/auth_event.dart';
 
-class RegisterStep2Screen extends StatefulWidget {
-  const RegisterStep2Screen({super.key});
+class RegisterStep2Screen extends StatelessWidget {
+  final RegisterCubit? cubit;
+
+  const RegisterStep2Screen({super.key, this.cubit});
 
   @override
-  State<RegisterStep2Screen> createState() => _RegisterStep2ScreenState();
+  Widget build(BuildContext context) {
+    final registerCubit =
+        cubit ?? (GoRouterState.of(context).extra as RegisterCubit?);
+
+    if (registerCubit == null) {
+      return Scaffold(
+        body: Center(child: Text('Error: RegisterCubit not found')),
+      );
+    }
+
+    return BlocProvider.value(
+      value: registerCubit,
+      child: const RegisterStep2View(),
+    );
+  }
 }
 
-class _RegisterStep2ScreenState extends State<RegisterStep2Screen> {
-  final _passwordController = TextEditingController();
+class RegisterStep2View extends StatefulWidget {
+  const RegisterStep2View({super.key});
+
+  @override
+  State<RegisterStep2View> createState() => _RegisterStep2ViewState();
+}
+
+class _RegisterStep2ViewState extends State<RegisterStep2View> {
   final _codeController = TextEditingController();
   final _inviteController = TextEditingController();
-  bool _obscureText = true;
 
   @override
   void dispose() {
-    _passwordController.dispose();
     _codeController.dispose();
     _inviteController.dispose();
     super.dispose();
   }
 
+  Future<void> _handleComplete() async {
+    final cubit = context.read<RegisterCubit>();
+    cubit.verificationCodeChanged(_codeController.text);
+
+    if (!cubit.state.isStep2Valid) {
+      return;
+    }
+
+    final response = await cubit.submitStep2();
+    if (response != null && mounted) {
+      context.read<AuthBloc>().add(AuthLoggedIn(user: response.user));
+      context.go('/home');
+    }
+  }
+
+  Future<void> _handleResendCode() async {
+    await context.read<RegisterCubit>().resendCode();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -96,62 +141,41 @@ class _RegisterStep2ScreenState extends State<RegisterStep2Screen> {
   }
 
   Widget _buildFormContainer() {
-    return SizedBox(
-      width: 327,
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.stretch,
-        children: [
-          _buildPasswordInput(),
-          const SizedBox(height: 12),
-          _buildCodeInput(),
-          const SizedBox(height: 12),
-          _buildInviteInput(),
-          const SizedBox(height: 12),
-          _buildStepIndicator(),
-          const SizedBox(height: 12),
-          AppButton(text: '完成注册', onPressed: () {}),
-        ],
-      ),
-    );
-  }
-
-  Widget _buildPasswordInput() {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        const Text(
-          '密码',
-          style: TextStyle(
-            fontSize: 13,
-            fontWeight: FontWeight.w500,
-            color: Color(0xFF475569),
-          ),
-        ),
-        const SizedBox(height: 6),
-        TextField(
-          controller: _passwordController,
-          obscureText: _obscureText,
-          decoration: InputDecoration(
-            hintText: '请输入至少 8 位密码',
-            suffixIcon: IconButton(
-              icon: Icon(
-                _obscureText ? Icons.visibility_off : Icons.visibility,
-                size: 20,
-                color: AppColors.slate400,
+    return BlocBuilder<RegisterCubit, RegisterState>(
+      builder: (context, state) {
+        return SizedBox(
+          width: 327,
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              _buildCodeInput(state),
+              const SizedBox(height: 12),
+              _buildInviteInput(),
+              const SizedBox(height: 12),
+              _buildStepIndicator(),
+              if (state.errorMessage != null)
+                Padding(
+                  padding: const EdgeInsets.only(top: 8),
+                  child: WarningBanner(
+                    message: state.errorMessage!,
+                    visible: true,
+                  ),
+                ),
+              const SizedBox(height: 12),
+              AppButton(
+                text: '完成注册',
+                onPressed: state.status == FormzSubmissionStatus.inProgress
+                    ? null
+                    : _handleComplete,
               ),
-              onPressed: () {
-                setState(() {
-                  _obscureText = !_obscureText;
-                });
-              },
-            ),
+            ],
           ),
-        ),
-      ],
+        );
+      },
     );
   }
 
-  Widget _buildCodeInput() {
+  Widget _buildCodeInput(RegisterState state) {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
@@ -187,7 +211,9 @@ class _RegisterStep2ScreenState extends State<RegisterStep2Screen> {
               width: 112,
               height: 40,
               child: OutlinedButton(
-                onPressed: () {},
+                onPressed: state.status == FormzSubmissionStatus.inProgress
+                    ? null
+                    : _handleResendCode,
                 style: OutlinedButton.styleFrom(
                   backgroundColor: AppColors.background,
                   side: const BorderSide(color: AppColors.input),