新增毛玻璃主题

lib/pages/movies/movie_form_page.dart

@@ -16,6 +16,7 @@ import '../../widgets/genre_selector_page.dart';
 import '../../widgets/text_input_panel.dart';
 import '../../widgets/duration_picker.dart';
 import '../../widgets/alternate_titles_dialog.dart';
+import '../../widgets/app_overlay.dart';
 
 /// 从多值字段列表中提取去重排序的唯一值（供 compute 使用）
 List<String> _collectUnique(List<List<String>> lists) {
@@ -147,7 +148,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
   void _showQuickAddDialog() {
     final textController = TextEditingController();
 
-    showDialog(
+    appDialog(
       context: context,
       builder: (dialogContext) {
         final colors = Theme.of(dialogContext).colorScheme;
@@ -748,7 +749,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
   /// 编辑名称（弹窗）
   Future<void> _editTitle() async {
     final controller = TextEditingController(text: _titleController.text);
-    final result = await showDialog<String>(
+    final result = await appDialog<String>(
       context: context,
       builder: (ctx) {
         final colors = Theme.of(ctx).colorScheme;
@@ -796,7 +797,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
 
   /// 编辑别名（弹窗 + 标签式输入）
   Future<void> _editAlternateTitles() async {
-    final result = await showDialog<List<String>>(
+    final result = await appDialog<List<String>>(
       context: context,
       builder: (ctx) => AlternateTitlesDialog(initial: _alternateTitles),
     );
@@ -807,7 +808,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
   /// 编辑观看次数
   Future<void> _editWatchCount() async {
     final controller = TextEditingController(text: _watchCount > 0 ? '$_watchCount' : '');
-    final result = await showDialog<String>(
+    final result = await appDialog<String>(
       context: context,
       builder: (ctx) => AlertDialog(
         title: const Text('观看次数'),
@@ -1118,7 +1119,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
   /// 显示封面选择选项
   void _showCoverOptions() {
     final colors = Theme.of(context).colorScheme;
-    showModalBottomSheet(
+    appModalBottomSheet(
       context: context,
       backgroundColor: colors.surface,
       shape: const RoundedRectangleBorder(
@@ -1292,7 +1293,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
   Future<void> _pickCoverFromUrl() async {
     final urlController = TextEditingController();
 
-    final confirmed = await showDialog<bool>(
+    final confirmed = await appDialog<bool>(
       context: context,
       builder: (ctx) {
         final colors = Theme.of(ctx).colorScheme;
@@ -1400,7 +1401,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
   Future<bool> _confirmLeave() async {
     if (!_hasContent()) return true;
     final colors = Theme.of(context).colorScheme;
-    final result = await showDialog<bool>(
+    final result = await appDialog<bool>(
       context: context,
       builder: (ctx) => AlertDialog(
         backgroundColor: colors.surface,