feat(apps): 重构 UI 架构为 presentation 层并新增 l10n 国际化支持

apps/lib/features/auth/data/auth_api.dart

@@ -1,4 +1,4 @@
-import 'package:social_app/core/api/i_api_client.dart';
+import 'package:social_app/core/network/i_api_client.dart';
 import 'models/signup_request.dart';
 import 'models/login_request.dart';
 import 'models/auth_response.dart';

apps/lib/features/auth/presentation/cubits/login_cubit.dart

@@ -3,10 +3,11 @@ import 'dart:async';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:formz/formz.dart';
 import 'package:equatable/equatable.dart';
-import '../../../../core/api/api_exception.dart';
+import '../../../../core/network/api_exception.dart';
+import '../../../../core/l10n/l10n.dart';
 import '../../data/auth_repository.dart';
 import '../../data/models/auth_response.dart';
-import '../../../../core/form_inputs/form_inputs.dart';
+import '../../../../shared/forms/inputs.dart';
 
 class LoginState extends Equatable {
   static const defaultDialCode = '+86';
@@ -121,7 +122,7 @@ class LoginCubit extends Cubit<LoginState> {
 
   Future<bool> sendCode() async {
     if (!state.phone.isValid) {
-      emit(state.copyWith(errorMessage: '请输入有效手机号'));
+      emit(state.copyWith(errorMessage: L10n.current.authInvalidPhone));
       return false;
     }
     if (!state.canSendCode) {
@@ -152,7 +153,9 @@ class LoginCubit extends Cubit<LoginState> {
       if (isClosed) {
         return false;
       }
-      final message = e is ApiException ? e.message : '验证码发送失败';
+      final message = e is ApiException
+          ? e.message
+          : L10n.current.authSendCodeFailed;
       emit(state.copyWith(isSendingCode: false, errorMessage: message));
       return false;
     }

apps/lib/features/auth/presentation/screens/login_screen.dart

@@ -4,8 +4,9 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:formz/formz.dart';
 import 'package:go_router/go_router.dart';
 
-import '../../../../core/di/injection.dart';
-import '../../../../core/router/app_routes.dart';
+import '../../../../app/di/injection.dart';
+import '../../../../app/router/app_routes.dart';
+import '../../../../core/l10n/l10n.dart';
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_button.dart';
 import '../../../../shared/widgets/banner/app_banner.dart';
@@ -85,12 +86,13 @@ class _LoginViewState extends State<LoginView> {
   }
 
   Future<bool> _showAgreementDialog() async {
+    final l10n = context.l10n;
     return await showConfirmSheet(
       context,
-      title: '请先同意协议',
-      message: '在使用我们的服务之前，请先阅读并同意《用户协议》和《隐私政策》。\n\n只有您同意上述协议，我们才能为您提供服务。',
-      confirmText: '确认',
-      cancelText: '取消',
+      title: l10n.authAgreementTitle,
+      message: l10n.authAgreementMessage,
+      confirmText: l10n.commonConfirm,
+      cancelText: l10n.commonCancel,
     );
   }
 
@@ -101,7 +103,7 @@ class _LoginViewState extends State<LoginView> {
         crossAxisAlignment: CrossAxisAlignment.center,
         children: [
           Semantics(
-            label: '同意用户协议与隐私政策',
+            label: context.l10n.authAgreementSemantics,
             checked: _agreedToTerms,
             button: true,
             child: InkWell(
@@ -143,17 +145,17 @@ class _LoginViewState extends State<LoginView> {
             text: TextSpan(
               style: const TextStyle(fontSize: 13, color: AppColors.slate600),
               children: [
-                const TextSpan(text: '我已同意'),
+                TextSpan(text: context.l10n.authAgreementPrefix),
                 TextSpan(
-                  text: '《用户协议》',
+                  text: context.l10n.authAgreementTerms,
                   style: const TextStyle(
                     color: AppColors.blue600,
                     decoration: TextDecoration.underline,
                   ),
                 ),
-                const TextSpan(text: '与'),
+                TextSpan(text: context.l10n.authAgreementAnd),
                 TextSpan(
-                  text: '《隐私政策》',
+                  text: context.l10n.authAgreementPrivacy,
                   style: const TextStyle(
                     color: AppColors.blue600,
                     decoration: TextDecoration.underline,
@@ -213,7 +215,7 @@ class _LoginViewState extends State<LoginView> {
                                       CrossAxisAlignment.stretch,
                                   children: [
                                     AuthField(
-                                      hint: '输入手机号',
+                                      hint: context.l10n.authPhoneHint,
                                       controller: _phoneController,
                                       onChanged: (value) {
                                         context.read<LoginCubit>().phoneChanged(
@@ -237,7 +239,7 @@ class _LoginViewState extends State<LoginView> {
                                     ),
                                     SizedBox(height: AppSpacing.lg),
                                     AuthField(
-                                      hint: '输入验证码',
+                                      hint: context.l10n.authCodeHint,
                                       controller: _codeController,
                                       onChanged: (value) {
                                         context.read<LoginCubit>().codeChanged(
@@ -256,7 +258,7 @@ class _LoginViewState extends State<LoginView> {
                                         child: LinkButton(
                                           text: state.resendCooldownSeconds > 0
                                               ? '${state.resendCooldownSeconds}s'
-                                              : '发送验证码',
+                                              : context.l10n.authSendCode,
                                           onTap: state.canSendCode
                                               ? _handleSendCode
                                               : null,
@@ -276,8 +278,8 @@ class _LoginViewState extends State<LoginView> {
                                               ? ToastType.error
                                               : ToastType.warning,
                                           title: state.errorMessage != null
-                                              ? '登录失败'
-                                              : '请检查输入',
+                                              ? context.l10n.authLoginFailed
+                                              : context.l10n.authCheckInput,
                                         ),
                                       ),
                                   ],
@@ -285,7 +287,7 @@ class _LoginViewState extends State<LoginView> {
                               ),
                               SizedBox(height: AppSpacing.xxl),
                               AppButton(
-                                text: '登录/注册',
+                                text: context.l10n.authLoginOrRegister,
                                 onPressed:
                                     state.status ==
                                         FormzSubmissionStatus.inProgress

apps/lib/features/auth/presentation/widgets/auth_page_scaffold.dart

@@ -146,8 +146,8 @@ class AuthHeroHeader extends StatelessWidget {
                 borderRadius: BorderRadius.circular(AppRadius.full),
                 child: Image.asset(
                   'assets/images/logo.png',
-                  width: 58,
-                  height: 58,
+                  width: 88,
+                  height: 88,
                   fit: BoxFit.cover,
                 ),
               ),

apps/lib/features/auth/presentation/widgets/password_field.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 
+import '../../../../core/l10n/l10n.dart';
 import '../../../../core/theme/design_tokens.dart';
 import 'auth_field.dart';
 
@@ -40,7 +41,9 @@ class _PasswordFieldState extends State<PasswordField> {
       onChanged: widget.onChanged,
       suffixIcon: IconButton(
         onPressed: _toggleVisibility,
-        tooltip: _obscured ? '显示密码' : '隐藏密码',
+        tooltip: _obscured
+            ? context.l10n.authShowPassword
+            : context.l10n.authHidePassword,
         icon: Icon(
           _obscured ? Icons.visibility_off_rounded : Icons.visibility_rounded,
           color: AppColors.authInputIcon,