feat(auth): 接入 Google 登录

- 登录页保留邮箱与 Google 两个入口，Google 按钮按官方规范改为白底四色图标
- 新增 GoogleAuthService：封装 initialize/authenticate，失败以结果对象返回
- AuthApi 增加 googleLogin，AuthController 增加 signInWithGoogle
- iOS 补充 CFBundleURLTypes 与 GIDClientID，Bundle ID 统一为 com.stormg.lumadrama
- Google 请求期间按钮显示转圈并禁止重复点击

lib/core/data/remote/auth_api.dart

@@ -125,6 +125,29 @@ class AuthApi {
     return AuthSession.fromJson((data as Map).cast<String, dynamic>());
   }
 
+  /// Google 登录：把客户端拿到的 idToken 交给后端校验并换发令牌。
+  ///
+  /// 账号按 Google 返回的邮箱归并：邮箱已存在则直接登入，不存在则自动建号。
+  Future<AuthSession> googleLogin({
+    required String idToken,
+    required String deviceId,
+    String platform = '',
+    String osVersion = '',
+    String appVersion = '',
+  }) async {
+    final data = await _client.post(
+      '/app/auth/google',
+      body: {
+        'idToken': idToken,
+        'deviceId': deviceId,
+        'platform': platform,
+        'osVersion': osVersion,
+        'appVersion': appVersion,
+      },
+    );
+    return AuthSession.fromJson((data as Map).cast<String, dynamic>());
+  }
+
   Future<AuthSession> refresh(
     String refreshToken, {
     String platform = '',

lib/core/data/services/auth_controller.dart

@@ -103,6 +103,17 @@ class AuthController extends ChangeNotifier {
     await _apply(session);
   }
 
+  /// Google 登录：把 Google 返回的 idToken 交给后端校验并落登录态。
+  Future<void> signInWithGoogle(String idToken) async {
+    final session = await _api.googleLogin(
+      idToken: idToken,
+      deviceId: await _store.deviceId(),
+      platform: _platform,
+      osVersion: _osVersion,
+    );
+    await _apply(session);
+  }
+
   Future<void> clear() async {
     _session = null;
     await _store.clear();

lib/core/data/services/google_auth_service.dart

@@ -0,0 +1,97 @@
+// Author: fruit.com.cn
+
+import 'dart:io' show Platform;
+
+import 'package:flutter/foundation.dart';
+import 'package:google_sign_in/google_sign_in.dart';
+
+/// Google 授权结局。
+///
+/// 插件调用与 IO 一样用结果对象返回，不把异常抛到页面：
+/// 页面只需要区分"成功 / 用户取消 / 不可用 / 失败"四种情况。
+class GoogleSignInOutcome {
+  const GoogleSignInOutcome._({
+    this.idToken,
+    this.canceled = false,
+    this.unavailable = false,
+    this.failed = false,
+  });
+
+  /// 成功拿到可交给后端校验的 idToken。
+  const GoogleSignInOutcome.success(String idToken) : this._(idToken: idToken);
+
+  /// 用户主动取消授权，页面不应提示错误。
+  const GoogleSignInOutcome.canceled() : this._(canceled: true);
+
+  /// 当前平台或构建不支持交互式登录。
+  const GoogleSignInOutcome.unavailable() : this._(unavailable: true);
+
+  /// 授权过程失败（网络、配置缺失、Google 拒绝等）。
+  const GoogleSignInOutcome.failed() : this._(failed: true);
+
+  /// Google 返回的 idToken；未成功时为 null。
+  final String? idToken;
+
+  /// 用户是否主动取消。
+  final bool canceled;
+
+  /// 平台是否不支持。
+  final bool unavailable;
+
+  /// 是否失败。
+  final bool failed;
+
+  /// 是否拿到了可用的 idToken。
+  bool get isSuccess => idToken != null && idToken!.isNotEmpty;
+}
+
+/// Google 登录客户端封装。
+///
+/// 只负责拉起 Google 授权并取出 idToken；换发本应用令牌由 AuthController 完成，
+/// 插件调用与网络层各自独立，页面通过 [GoogleSignInOutcome] 判断结局。
+class GoogleAuthService {
+  GoogleAuthService({GoogleSignIn? signIn})
+      : _signIn = signIn ?? GoogleSignIn.instance;
+
+  /// Android 必须显式传 serverClientId 才会返回 idToken，且要传 Web 客户端 id；
+  /// iOS 由 Info.plist 的 GIDClientID 决定，无需再传。
+  static const String _serverClientId =
+      '11115008580-dbqe47fhp5560nhrocrppiq7hcnlvl1s.apps.googleusercontent.com';
+
+  final GoogleSignIn _signIn;
+  bool _initialized = false;
+
+  /// 拉起授权并返回结局；不会抛异常。
+  Future<GoogleSignInOutcome> signIn() async {
+    try {
+      await _ensureInitialized();
+      if (!_signIn.supportsAuthenticate()) {
+        return const GoogleSignInOutcome.unavailable();
+      }
+      final account = await _signIn.authenticate();
+      final idToken = account.authentication.idToken;
+      if (idToken == null || idToken.isEmpty) {
+        return const GoogleSignInOutcome.failed();
+      }
+      return GoogleSignInOutcome.success(idToken);
+    } on GoogleSignInException catch (error) {
+      if (error.code == GoogleSignInExceptionCode.canceled) {
+        return const GoogleSignInOutcome.canceled();
+      }
+      return const GoogleSignInOutcome.failed();
+    } catch (_) {
+      return const GoogleSignInOutcome.failed();
+    }
+  }
+
+  /// 插件要求先 initialize 才能 authenticate；只做一次。
+  Future<void> _ensureInitialized() async {
+    if (_initialized) return;
+    await _signIn.initialize(
+      serverClientId: _isAndroid ? _serverClientId : null,
+    );
+    _initialized = true;
+  }
+
+  bool get _isAndroid => !kIsWeb && Platform.isAndroid;
+}

lib/l10n/app_en.arb

@@ -32,6 +32,7 @@
   "authContinueGoogle": "Continue with Google",
   "authPhoneSignIn": "Phone sign in",
   "authEmailSignIn": "Email sign in",
+  "authGoogleFailed": "Google sign in failed, please try again",
   "suspense": "Suspense",
   "romance": "Romance",
   "actionGenre": "Action",

lib/l10n/app_id.arb

@@ -32,6 +32,7 @@
   "authContinueGoogle": "Lanjutkan dengan Google",
   "authPhoneSignIn": "Masuk dengan ponsel",
   "authEmailSignIn": "Masuk dengan email",
+  "authGoogleFailed": "Gagal masuk dengan Google, silakan coba lagi",
   "suspense": "Thriller",
   "romance": "Romantis",
   "actionGenre": "Aksi",

lib/l10n/app_localizations.dart

@@ -292,6 +292,12 @@ abstract class AppLocalizations {
   /// **'Email sign in'**
   String get authEmailSignIn;
 
+  /// No description provided for @authGoogleFailed.
+  ///
+  /// In en, this message translates to:
+  /// **'Google sign in failed, please try again'**
+  String get authGoogleFailed;
+
   /// No description provided for @suspense.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_en.dart

@@ -106,6 +106,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get authEmailSignIn => 'Email sign in';
 
+  @override
+  String get authGoogleFailed => 'Google sign in failed, please try again';
+
   @override
   String get suspense => 'Suspense';
 

lib/l10n/app_localizations_id.dart

@@ -106,6 +106,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get authEmailSignIn => 'Masuk dengan email';
 
+  @override
+  String get authGoogleFailed => 'Gagal masuk dengan Google, silakan coba lagi';
+
   @override
   String get suspense => 'Thriller';
 

lib/l10n/app_localizations_zh.dart

@@ -104,6 +104,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get authEmailSignIn => '邮箱登录';
 
+  @override
+  String get authGoogleFailed => 'Google 登录失败，请稍后重试';
+
   @override
   String get suspense => '悬疑';
 

lib/l10n/app_zh.arb

@@ -32,6 +32,7 @@
   "authContinueGoogle": "使用 Google 继续",
   "authPhoneSignIn": "手机号登录",
   "authEmailSignIn": "邮箱登录",
+  "authGoogleFailed": "Google 登录失败，请稍后重试",
   "suspense": "悬疑",
   "romance": "都市爱情",
   "actionGenre": "动作",

lib/pages/auth/auth_view.dart

@@ -9,6 +9,7 @@ import '../../core/data/remote/api_client.dart';
 import '../../core/formatting/error_text.dart';
 import '../../core/data/services/app_config_controller.dart';
 import '../../core/data/services/auth_controller.dart';
+import '../../core/data/services/google_auth_service.dart';
 import '../../core/platform/haptics.dart';
 import '../../core/platform/keyboard_inset.dart';
 import '../../core/theme/app_colors.dart';
@@ -20,7 +21,6 @@ import '../../core/widgets/subpage_header.dart';
 import '../../l10n/app_localizations.dart';
 import 'auth_legal_links.dart';
 import 'auth_logic.dart';
-import 'phone_auth_sheet.dart';
 
 part 'auth_widgets.dart';
 part 'auth_form_widgets.dart';
@@ -31,6 +31,7 @@ const double _compactBrandMarkSize = 48;
 const double _brandMarkRadius = 26;
 const double _compactBrandMarkRadius = 14;
 const String _appLogoAsset = 'assets/icon/ymb.png';
+const String _googleIconAsset = 'assets/icon/google_g.png';
 const double _contentMaxWidth = 440;
 const double _fieldHeight = 52;
 const double _fieldRadius = 12;
@@ -49,6 +50,8 @@ const double _entryButtonHeight = 52;
 const double _entryButtonRadius = 26;
 const double _entryButtonFontSize = 15;
 const double _entryIconSize = 20;
+const double _loadingStrokeWidth = 2;
+const Color _googleOnLight = Color(0xFF1F1F1F);
 const Duration _enterDuration = Duration(milliseconds: 220);
 
 Widget _brandMarkWidget({
@@ -80,6 +83,7 @@ class AuthPage extends StatefulWidget {
 
 class _AuthPageState extends State<AuthPage> {
   late AuthLogic _logic;
+  late final GoogleAuthService _googleAuth;
   late final TextEditingController _emailController;
   late final TextEditingController _passwordController;
   late final FocusNode _emailFocus;
@@ -94,6 +98,7 @@ class _AuthPageState extends State<AuthPage> {
   void initState() {
     super.initState();
     _logic = AuthLogic(signUpMode: widget.signUpMode);
+    _googleAuth = GoogleAuthService();
     _emailController = TextEditingController();
     _passwordController = TextEditingController();
     _emailFocus = FocusNode(debugLabel: 'auth-email-focus');
@@ -248,6 +253,42 @@ class _AuthPageState extends State<AuthPage> {
     showCenteredToast(context, failureMessage);
   }
 
+  /// Google 登录：先取 Google idToken，再交给后端换发本应用令牌。
+  ///
+  /// 用户取消不提示错误；平台不支持或授权失败提示重试。
+  Future<void> _signInWithGoogle() async {
+    if (_logic.busy) return;
+    final l10n = AppLocalizations.of(context)!;
+    unawaited(context.read<Haptics>().lightImpact());
+    FocusScope.of(context).unfocus();
+    setState(() {
+      _logic.busy = true;
+      _logic.errorMessage = null;
+    });
+    final auth = context.read<AuthController>();
+    String? failureMessage;
+    try {
+      final outcome = await _googleAuth.signIn();
+      if (!mounted) return;
+      if (outcome.canceled) return;
+      if (!outcome.isSuccess) {
+        failureMessage = l10n.authGoogleFailed;
+      } else {
+        await auth.signInWithGoogle(outcome.idToken!);
+        if (!mounted) return;
+        Navigator.of(context).maybePop();
+      }
+    } on ApiException catch (error) {
+      failureMessage = userFacingApiMessage(l10n, error.code, error.message);
+    } catch (_) {
+      failureMessage = l10n.authNetworkError;
+    } finally {
+      if (mounted) setState(() => _logic.busy = false);
+    }
+    if (!mounted || failureMessage == null) return;
+    showCenteredToast(context, failureMessage);
+  }
+
   @override
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
@@ -437,21 +478,23 @@ class _AuthPageState extends State<AuthPage> {
               ),
             ),
             const Spacer(flex: 2),
-            _AuthEntryButton(
-              key: const Key('auth-entry-phone'),
-              label: l10n.authPhoneSignIn,
-              icon: Icons.phone_android_rounded,
-              primary: true,
-              onTap: _openPhoneSheet,
-            ),
-            const SizedBox(height: 12),
             _AuthEntryButton(
               key: const Key('auth-entry-email'),
               label: l10n.authEmailSignIn,
               icon: Icons.mail_outline_rounded,
-              primary: false,
+              primary: true,
               onTap: () => setState(() => _emailEntryOpen = true),
             ),
+            const SizedBox(height: 12),
+            _AuthEntryButton(
+              key: const Key('auth-entry-google'),
+              label: l10n.authContinueGoogle,
+              imageAsset: _googleIconAsset,
+              light: true,
+              primary: false,
+              loading: _logic.busy,
+              onTap: _signInWithGoogle,
+            ),
             const SizedBox(height: 14),
             const Opacity(opacity: 0.75, child: AuthLegalLinks()),
             const Spacer(flex: 6),
@@ -459,14 +502,6 @@ class _AuthPageState extends State<AuthPage> {
         ),
       );
 
-  Future<void> _openPhoneSheet() async {
-    final signedIn = await showPhoneAuthSheet(
-      context,
-      signUp: _logic.signUpMode,
-    );
-    if (signedIn == true && mounted) Navigator.of(context).maybePop();
-  }
-
   Widget _authCard(AppLocalizations l10n) => _AuthCard(
     state: _AuthCardState(
       l10n: l10n,
@@ -513,6 +548,9 @@ class _AuthEntryButton extends StatelessWidget {
     required this.primary,
     required this.onTap,
     this.icon,
+    this.imageAsset,
+    this.light = false,
+    this.loading = false,
   });
 
   final String label;
@@ -520,13 +558,24 @@ class _AuthEntryButton extends StatelessWidget {
   final VoidCallback onTap;
   final IconData? icon;
 
+  /// 需要显示彩色品牌图标时用图片；与 [icon] 二选一。
+  final String? imageAsset;
+
+  /// 白底深字样式（Google 官方按钮规范），用于第三方登录入口。
+  final bool light;
+
+  /// 请求进行中：显示转圈并禁止重复点击。
+  final bool loading;
+
   @override
   Widget build(BuildContext context) {
-    // 主按钮纯品牌红；次按钮为无边框深色玻璃（白 6%），Apple 风格。
+    // 主按钮纯品牌红；次按钮为无边框深色玻璃（白 6%）；第三方登录用白底深字。
     final background = primary
         ? AppColors.brandRed
-        : Colors.white.withValues(alpha: 0.06);
-    final foreground = primary ? AppColors.onPrimary : AppColors.onSurface;
+        : (light ? Colors.white : Colors.white.withValues(alpha: 0.06));
+    final foreground = primary
+        ? AppColors.onPrimary
+        : (light ? _googleOnLight : AppColors.onSurface);
     return Material(
       color: background,
       shape: RoundedRectangleBorder(
@@ -534,16 +583,34 @@ class _AuthEntryButton extends StatelessWidget {
       ),
       clipBehavior: Clip.antiAlias,
       child: InkWell(
-        onTap: onTap,
+        onTap: loading ? null : onTap,
         borderRadius: BorderRadius.circular(_entryButtonRadius),
         child: SizedBox(
           height: _entryButtonHeight,
           child: Row(
             mainAxisAlignment: MainAxisAlignment.center,
             children: [
-              if (icon != null)
+              if (loading) ...[
+                SizedBox(
+                  width: _entryIconSize,
+                  height: _entryIconSize,
+                  child: CircularProgressIndicator(
+                    strokeWidth: _loadingStrokeWidth,
+                    valueColor: AlwaysStoppedAnimation<Color>(foreground),
+                  ),
+                ),
+                const SizedBox(width: 10),
+              ] else if (imageAsset != null) ...[
+                Image.asset(
+                  imageAsset!,
+                  width: _entryIconSize,
+                  height: _entryIconSize,
+                ),
+                const SizedBox(width: 10),
+              ] else if (icon != null) ...[
                 Icon(icon, size: _entryIconSize, color: foreground),
-              if (icon != null) const SizedBox(width: 8),
+                const SizedBox(width: 8),
+              ],
               Flexible(
                 child: Text(
                   label,