新增毛玻璃主题

lib/pages/note/note_detail_page.dart

@@ -15,6 +15,7 @@ import '../../utils/responsive.dart';
 import '../../widgets/vditor_editor.dart';
 import '../../widgets/tag_side_panel.dart';
 import 'note_share_page.dart';
+import '../../widgets/app_overlay.dart';
 
 /// 笔记详情页
 class NoteDetailPage extends StatefulWidget {
@@ -804,7 +805,7 @@ class _NoteDetailPageState extends State<NoteDetailPage> {
   }
 
   void _showImagePreview(List<String> images, int initialIndex) {
-    showDialog(
+    appDialog(
       context: context,
       barrierDismissible: true,
       builder: (context) => GestureDetector(
@@ -920,7 +921,7 @@ class _NoteDetailPageState extends State<NoteDetailPage> {
 
   void _showDeleteDialog(BuildContext context) {
     final errorColor = Theme.of(context).colorScheme.error;
-    showDialog(
+    appDialog(
       context: context,
       builder: (ctx) => AlertDialog(
         title: const Text('删除笔记'),

lib/pages/note/note_form_page.dart

@@ -13,6 +13,7 @@ import '../../utils/image_saver.dart';
 import '../../widgets/fade_in_local_image.dart';
 import '../../widgets/tag_side_panel.dart';
 import '../../widgets/vditor_editor.dart';
+import '../../widgets/app_overlay.dart';
 
 /// 添加/编辑笔记页面 - 极简书写界面
 class NoteFormPage extends StatefulWidget {
@@ -625,7 +626,7 @@ class _NoteFormPageState extends State<NoteFormPage> {
     _autoSaveTimer?.cancel();
     if (!_hasContent()) return true;
 
-    final result = await showDialog<String>(
+    final result = await appDialog<String>(
       context: context,
       builder: (ctx) {
         final colors = Theme.of(ctx).colorScheme;
@@ -899,7 +900,7 @@ class _NoteFormPageState extends State<NoteFormPage> {
 
   /// 显示图片预览
   void _showImagePreview(int index) {
-    showDialog(
+    appDialog(
       context: context,
       barrierDismissible: true,
       builder: (context) => GestureDetector(
@@ -926,7 +927,7 @@ class _NoteFormPageState extends State<NoteFormPage> {
 
   /// 显示删除图片确认对话框
   void _showDeleteImageDialog(int index) {
-    showDialog(
+    appDialog(
       context: context,
       builder: (context) {
         final colors = Theme.of(context).colorScheme;

lib/pages/note/note_tab_page.dart

@@ -11,6 +11,7 @@ import '../../widgets/master_detail_scaffold.dart';
 import '../../widgets/detail_placeholder.dart';
 import 'note_detail_page.dart';
 import 'note_add_page.dart';
+import '../../widgets/app_overlay.dart';
 
 /// 笔记标签页（分页 + 触底加载）
 class NoteTabPage extends StatefulWidget {
@@ -355,7 +356,7 @@ class _NoteTabPageState extends State<NoteTabPage> {
 
   void _showNoteActions(Note note) {
     final colors = Theme.of(context).colorScheme;
-    showModalBottomSheet(
+    appModalBottomSheet(
       context: context,
       backgroundColor: colors.surface,
       shape: const RoundedRectangleBorder(borderRadius: BorderRadius.vertical(top: Radius.circular(16))),
@@ -398,7 +399,7 @@ class _NoteTabPageState extends State<NoteTabPage> {
 
   void _showDeleteDialog(Note note) {
     final colors = Theme.of(context).colorScheme;
-    showDialog(
+    appDialog(
       context: context,
       builder: (ctx) => AlertDialog(
         backgroundColor: colors.surface, elevation: 0,