diff --git a/jive-flutter/lib/widgets/dialogs/accept_invitation_dialog.dart b/jive-flutter/lib/widgets/dialogs/accept_invitation_dialog.dart
index 81afc3ed..86d671fa 100644
--- a/jive-flutter/lib/widgets/dialogs/accept_invitation_dialog.dart
+++ b/jive-flutter/lib/widgets/dialogs/accept_invitation_dialog.dart
@@ -6,7 +6,6 @@ import 'package:jive_money/models/user.dart';
 import 'package:jive_money/services/invitation_service.dart';
 import 'package:jive_money/providers/family_provider.dart';
 import 'package:jive_money/providers/auth_provider.dart';
-import 'package:jive_money/utils/snackbar_utils.dart';
 
 /// 接受邀请对话框
 class AcceptInvitationDialog extends ConsumerStatefulWidget {
@@ -48,6 +47,8 @@ class _AcceptInvitationDialogState
     });
 
     try {
+      final messenger = ScaffoldMessenger.of(context);
+      final navigator = Navigator.of(context);
       // 调用服务接受邀请
       final success = await _invitationService.acceptInvitation(
         invitationId: invitation.id,
@@ -57,25 +58,27 @@ class _AcceptInvitationDialogState
       if (success && mounted) {
         // 刷新家庭列表
         await ref.read(familyControllerProvider.notifier).loadUserFamilies();
-        if (!context.mounted) return;
+        if (!mounted) return;
 
         // 显示成功消息
-        SnackbarUtils.showSuccess(
-          context,
-          '已成功加入 ${family.name}',
+        messenger.hideCurrentSnackBar();
+        messenger.showSnackBar(
+          SnackBar(content: Text('已成功加入 ${family.name}')),
         );
-
         // 关闭对话框
-        Navigator.of(context).pop(true);
+        navigator.pop(true);
 
         // 触发回调
         widget.onAccepted?.call();
       }
     } catch (e) {
       if (mounted) {
-        SnackbarUtils.showError(
-          context,
-          '接受邀请失败: ${e.toString()}',
+        final messengerErr = ScaffoldMessenger.of(context);
+        messengerErr.showSnackBar(
+          SnackBar(
+            content: Text('接受邀请失败: ${e.toString()}'),
+            backgroundColor: Colors.red,
+          ),
         );
       }
     } finally {
@@ -90,8 +93,6 @@ class _AcceptInvitationDialogState
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
-    final currentUser = ref.watch(authStateProvider).value;
-
     return AlertDialog(
       title: Text(_showConfirmation ? '确认加入' : '邀请详情'),
       content: SingleChildScrollView(
diff --git a/jive-flutter/lib/widgets/dialogs/delete_family_dialog.dart b/jive-flutter/lib/widgets/dialogs/delete_family_dialog.dart
index 8e6f3b38..8569ccf7 100644
--- a/jive-flutter/lib/widgets/dialogs/delete_family_dialog.dart
+++ b/jive-flutter/lib/widgets/dialogs/delete_family_dialog.dart
@@ -40,6 +40,9 @@ class _DeleteFamilyDialogState extends ConsumerState<DeleteFamilyDialog> {
   Future<void> _deleteFamily() async {
     if (!_isNameValid) return;
 
+    final navigator = Navigator.of(context);
+    final messenger = ScaffoldMessenger.of(context);
+
     // 二次确认
     final secondConfirm = await showDialog<bool>(
       context: context,
@@ -81,7 +84,7 @@ class _DeleteFamilyDialogState extends ConsumerState<DeleteFamilyDialog> {
       await familyService.deleteFamily(widget.family.id);
 
       // 刷新Family列表
-      ref.refresh(userFamiliesProvider);
+      final _ = ref.refresh(userFamiliesProvider);
 
       if (mounted) {
         // 如果删除的是当前Family，切换到其他Family或显示空状态
@@ -91,13 +94,13 @@ class _DeleteFamilyDialogState extends ConsumerState<DeleteFamilyDialog> {
           if (families.isNotEmpty) {
             // 切换到第一个可用的Family
             await familyService.switchFamily(families.first.family.id);
-            if (!context.mounted) return;
-            ref.refresh(currentFamilyProvider);
+            if (!mounted) return;
+            final _ = ref.refresh(currentFamilyProvider);
           }
         }
 
-        Navigator.of(context).pop(true);
-        ScaffoldMessenger.of(context).showSnackBar(
+        navigator.pop(true);
+        messenger.showSnackBar(
           SnackBar(
             content: Text('已删除 "${widget.family.name}"'),
             backgroundColor: Colors.green,
@@ -105,7 +108,7 @@ class _DeleteFamilyDialogState extends ConsumerState<DeleteFamilyDialog> {
         );
 
         // 导航到Family列表或Dashboard
-        Navigator.of(context).pushNamedAndRemoveUntil(
+        navigator.pushNamedAndRemoveUntil(
           '/dashboard',
           (route) => false,
         );
diff --git a/jive-flutter/lib/widgets/qr_code_generator.dart b/jive-flutter/lib/widgets/qr_code_generator.dart
index 930f79ea..85f3e487 100644
--- a/jive-flutter/lib/widgets/qr_code_generator.dart
+++ b/jive-flutter/lib/widgets/qr_code_generator.dart
@@ -198,8 +198,8 @@ class _QrCodeGeneratorState extends State<QrCodeGenerator>
               ? SizedBox(
                   width: widget.size,
                   height: widget.size,
-                  child: const Center(
-                    child: const CircularProgressIndicator(),
+                  child: Center(
+                    child: CircularProgressIndicator(),
                   ),
                 )
               : ScaleTransition(
@@ -321,7 +321,7 @@ class _QrCodeGeneratorState extends State<QrCodeGenerator>
       width: size ?? 200,
       height: size ?? 200,
       color: backgroundColor ?? Colors.white,
-      child: const Center(
+      child: Center(
         child: Text(
           'QR Code Placeholder',
           style: TextStyle(color: foregroundColor ?? Colors.black),
diff --git a/jive-flutter/lib/widgets/states/loading_indicator.dart b/jive-flutter/lib/widgets/states/loading_indicator.dart
index d4589a72..dcf5c4ae 100644
--- a/jive-flutter/lib/widgets/states/loading_indicator.dart
+++ b/jive-flutter/lib/widgets/states/loading_indicator.dart
@@ -26,7 +26,7 @@ class LoadingIndicator extends StatelessWidget {
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            const SizedBox(
+            SizedBox(
               width: size,
               height: size,
               child: CircularProgressIndicator(
@@ -35,7 +35,7 @@ class LoadingIndicator extends StatelessWidget {
               ),
             ),
             if (message != null) ...[
-              const SizedBox(height: 16),
+              SizedBox(height: 16),
               Text(
                 message!,
                 style: theme.textTheme.bodyMedium?.copyWith(
@@ -115,7 +115,7 @@ class LoadingButton extends StatelessWidget {
       onPressed: isLoading ? null : onPressed,
       style: style,
       child: isLoading
-          ? const SizedBox(
+          ? SizedBox(
               width: loadingSize,
               height: loadingSize,
               child: CircularProgressIndicator(