fix(auth): 登录异常改为居中吐司

lib/core/widgets/centered_error_dialog.dart

@@ -1,67 +0,0 @@
-// Author: fruit.com.cn
-
-import 'package:flutter/material.dart';
-
-import '../../l10n/app_localizations.dart';
-import '../theme/app_colors.dart';
-
-const Key _dialogKey = Key('centered-error-dialog');
-const Key _confirmKey = Key('centered-error-confirm');
-const double _dialogRadius = 16;
-const double _titleHorizontalInset = 24;
-const double _titleTopInset = 24;
-const double _contentHorizontalInset = 24;
-const double _contentTopInset = 12;
-const double _contentBottomInset = 8;
-const double _actionsHorizontalInset = 16;
-const double _actionsBottomInset = 12;
-const EdgeInsets _titlePadding = EdgeInsets.fromLTRB(
-  _titleHorizontalInset,
-  _titleTopInset,
-  _titleHorizontalInset,
-  0,
-);
-const EdgeInsets _contentPadding = EdgeInsets.fromLTRB(
-  _contentHorizontalInset,
-  _contentTopInset,
-  _contentHorizontalInset,
-  _contentBottomInset,
-);
-const EdgeInsets _actionsPadding = EdgeInsets.fromLTRB(
-  _actionsHorizontalInset,
-  0,
-  _actionsHorizontalInset,
-  _actionsBottomInset,
-);
-
-/// Shows a reusable error dialog centered on the screen.
-Future<void> showCenteredErrorDialog(
-  BuildContext context, {
-  required String title,
-  required String message,
-}) async {
-  final l10n = AppLocalizations.of(context)!;
-  await showDialog<void>(
-    context: context,
-    barrierDismissible: true,
-    builder: (dialogContext) => AlertDialog(
-      key: _dialogKey,
-      backgroundColor: AppColors.card,
-      shape: RoundedRectangleBorder(
-        borderRadius: BorderRadius.circular(_dialogRadius),
-      ),
-      titlePadding: _titlePadding,
-      contentPadding: _contentPadding,
-      title: Text(title),
-      content: Text(message),
-      actionsPadding: _actionsPadding,
-      actions: [
-        TextButton(
-          key: _confirmKey,
-          onPressed: () => Navigator.of(dialogContext).pop(),
-          child: Text(l10n.authErrorConfirm),
-        ),
-      ],
-    ),
-  );
-}

lib/core/widgets/centered_toast.dart

@@ -0,0 +1,128 @@
+// Author: fruit.com.cn
+
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+
+const Key _toastKey = Key('centered-toast');
+const Duration _fadeDuration = Duration(milliseconds: 200);
+const Duration _visibleDuration = Duration(seconds: 2);
+const double _toastRadius = 12;
+const double _toastMaxWidth = 320;
+const double _toastHorizontalInset = 20;
+const double _toastVerticalInset = 12;
+const double _toastBackgroundOpacity = 0.78;
+const TextStyle _toastTextStyle = TextStyle(
+  color: Colors.white,
+  fontSize: 14,
+  height: 1.4,
+  fontWeight: FontWeight.w500,
+);
+const EdgeInsets _toastPadding = EdgeInsets.symmetric(
+  horizontal: _toastHorizontalInset,
+  vertical: _toastVerticalInset,
+);
+
+OverlayEntry? _activeToast;
+
+/// Shows a lightweight centered message and replaces any active toast.
+void showCenteredToast(BuildContext context, String message) {
+  _removeActiveToast();
+  final overlay = Overlay.of(context, rootOverlay: true);
+  late final OverlayEntry entry;
+  entry = OverlayEntry(
+    builder: (_) => _CenteredToast(
+      message: message,
+      onDismissed: () {
+        if (!identical(_activeToast, entry)) return;
+        _activeToast = null;
+        if (entry.mounted) entry.remove();
+      },
+    ),
+  );
+  _activeToast = entry;
+  overlay.insert(entry);
+}
+
+void _removeActiveToast() {
+  final entry = _activeToast;
+  _activeToast = null;
+  if (entry != null && entry.mounted) entry.remove();
+}
+
+class _CenteredToast extends StatefulWidget {
+  const _CenteredToast({required this.message, required this.onDismissed});
+
+  final String message;
+  final VoidCallback onDismissed;
+
+  @override
+  State<_CenteredToast> createState() => _CenteredToastState();
+}
+
+class _CenteredToastState extends State<_CenteredToast>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController _opacity = AnimationController(
+    vsync: this,
+    duration: _fadeDuration,
+  );
+  Timer? _dismissTimer;
+
+  @override
+  void initState() {
+    super.initState();
+    _opacity.forward();
+    _dismissTimer = Timer(_visibleDuration, _dismiss);
+  }
+
+  Future<void> _dismiss() async {
+    try {
+      await _opacity.reverse();
+    } on TickerCanceled {
+      return;
+    }
+    if (mounted) widget.onDismissed();
+  }
+
+  @override
+  void dispose() {
+    _dismissTimer?.cancel();
+    _opacity.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Positioned.fill(
+      child: IgnorePointer(
+        child: Center(
+          child: FadeTransition(
+            opacity: CurvedAnimation(
+              parent: _opacity,
+              curve: Curves.easeOutCubic,
+            ),
+            child: Material(
+              type: MaterialType.transparency,
+              child: Container(
+                key: _toastKey,
+                constraints: const BoxConstraints(maxWidth: _toastMaxWidth),
+                padding: _toastPadding,
+                decoration: BoxDecoration(
+                  color: Colors.black.withValues(
+                    alpha: _toastBackgroundOpacity,
+                  ),
+                  borderRadius: BorderRadius.circular(_toastRadius),
+                ),
+                child: Text(
+                  widget.message,
+                  textAlign: TextAlign.center,
+                  style: _toastTextStyle,
+                ),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/l10n/app_en.arb

@@ -435,9 +435,6 @@
   "authPasswordLength": "Password must be 8-64 characters",
   "authPasswordWeak": "Password needs both letters and numbers",
   "authNetworkError": "Network error, please try again",
-  "authLoginFailed": "Login failed",
-  "authRegisterFailed": "Registration failed",
-  "authErrorConfirm": "OK",
   "authSwitchToSignUp": "New here? Create an account",
   "authSwitchToSignIn": "Already have an account? Sign in",
   "authGateTitle": "Sign in to continue",

lib/l10n/app_id.arb

@@ -409,9 +409,6 @@
   "authPasswordLength": "Kata sandi harus 8-64 karakter",
   "authPasswordWeak": "Kata sandi perlu huruf dan angka",
   "authNetworkError": "Jaringan bermasalah, coba lagi",
-  "authLoginFailed": "Gagal masuk",
-  "authRegisterFailed": "Pendaftaran gagal",
-  "authErrorConfirm": "Mengerti",
   "authSwitchToSignUp": "Baru di sini? Buat akun",
   "authSwitchToSignIn": "Sudah punya akun? Masuk",
   "authGateTitle": "Masuk untuk melanjutkan",

lib/l10n/app_localizations.dart

@@ -1888,24 +1888,6 @@ abstract class AppLocalizations {
   /// **'Network error, please try again'**
   String get authNetworkError;
 
-  /// No description provided for @authLoginFailed.
-  ///
-  /// In en, this message translates to:
-  /// **'Login failed'**
-  String get authLoginFailed;
-
-  /// No description provided for @authRegisterFailed.
-  ///
-  /// In en, this message translates to:
-  /// **'Registration failed'**
-  String get authRegisterFailed;
-
-  /// No description provided for @authErrorConfirm.
-  ///
-  /// In en, this message translates to:
-  /// **'OK'**
-  String get authErrorConfirm;
-
   /// No description provided for @authSwitchToSignUp.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_en.dart

@@ -958,15 +958,6 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get authNetworkError => 'Network error, please try again';
 
-  @override
-  String get authLoginFailed => 'Login failed';
-
-  @override
-  String get authRegisterFailed => 'Registration failed';
-
-  @override
-  String get authErrorConfirm => 'OK';
-
   @override
   String get authSwitchToSignUp => 'New here? Create an account';
 

lib/l10n/app_localizations_id.dart

@@ -962,15 +962,6 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get authNetworkError => 'Jaringan bermasalah, coba lagi';
 
-  @override
-  String get authLoginFailed => 'Gagal masuk';
-
-  @override
-  String get authRegisterFailed => 'Pendaftaran gagal';
-
-  @override
-  String get authErrorConfirm => 'Mengerti';
-
   @override
   String get authSwitchToSignUp => 'Baru di sini? Buat akun';
 

lib/l10n/app_localizations_zh.dart

@@ -946,15 +946,6 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get authNetworkError => '网络异常，请稍后重试';
 
-  @override
-  String get authLoginFailed => '登录失败';
-
-  @override
-  String get authRegisterFailed => '注册失败';
-
-  @override
-  String get authErrorConfirm => '知道了';
-
   @override
   String get authSwitchToSignUp => '还没有账号？去注册';
 

lib/l10n/app_zh.arb

@@ -371,9 +371,6 @@
   "authPasswordLength": "密码长度需在 8-64 位之间",
   "authPasswordWeak": "密码需同时包含字母和数字",
   "authNetworkError": "网络异常，请稍后重试",
-  "authLoginFailed": "登录失败",
-  "authRegisterFailed": "注册失败",
-  "authErrorConfirm": "知道了",
   "authSwitchToSignUp": "还没有账号？去注册",
   "authSwitchToSignIn": "已有账号？去登录",
   "authGateTitle": "登录后可继续",

lib/pages/auth/auth_view.dart

@@ -12,7 +12,7 @@ import '../../core/platform/keyboard_inset.dart';
 import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_dimens.dart';
 import '../../core/theme/app_theme.dart';
-import '../../core/widgets/centered_error_dialog.dart';
+import '../../core/widgets/centered_toast.dart';
 import '../../core/widgets/subpage_header.dart';
 import '../../l10n/app_localizations.dart';
 import 'auth_logic.dart';
@@ -251,11 +251,7 @@ class _AuthPageState extends State<AuthPage> {
       if (mounted) setState(() => _logic.busy = false);
     }
     if (!mounted || failureMessage == null) return;
-    await showCenteredErrorDialog(
-      context,
-      title: _logic.signUpMode ? l10n.authRegisterFailed : l10n.authLoginFailed,
-      message: failureMessage,
-    );
+    showCenteredToast(context, failureMessage);
   }
 
   @override

lib/pages/auth/phone_auth_sheet.dart

@@ -11,7 +11,7 @@ import '../../core/data/services/auth_controller.dart';
 import '../../core/platform/haptics.dart';
 import '../../core/platform/keyboard_inset.dart';
 import '../../core/theme/app_colors.dart';
-import '../../core/widgets/centered_error_dialog.dart';
+import '../../core/widgets/centered_toast.dart';
 import '../../l10n/app_localizations.dart';
 
 const double _fieldHeight = 52;
@@ -187,7 +187,7 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
       if (mounted) setState(() => _sending = false);
     }
     if (mounted && failureMessage != null) {
-      await _showFailure(failureMessage);
+      showCenteredToast(context, failureMessage);
     }
   }
 
@@ -235,19 +235,10 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
       if (mounted) setState(() => _submitting = false);
     }
     if (mounted && failureMessage != null) {
-      await _showFailure(failureMessage);
+      showCenteredToast(context, failureMessage);
     }
   }
 
-  Future<void> _showFailure(String message) {
-    final l10n = AppLocalizations.of(context)!;
-    return showCenteredErrorDialog(
-      context,
-      title: _signUp ? l10n.authRegisterFailed : l10n.authLoginFailed,
-      message: message,
-    );
-  }
-
   void _switchMode() {
     setState(() {
       _signUp = !_signUp;