更新pubspec。修改启动屏幕的启动后台XML，并通过删除过时的文件和增强会话管理来重构记录功能。

test/features/recording/view_model_recording_test.dart

@@ -25,6 +25,19 @@ void main() {
         .setMockMethodCallHandler(SystemChannels.platform, null);
   });
 
+  group('RecordingViewModel', () {
+    test('initializes with default clipboard and session state', () {
+      final container = ProviderContainer();
+      addTearDown(container.dispose);
+
+      final model = container.read(recordingViewModelProvider);
+      expect(model.hasValidClipboardInfo, isFalse);
+      expect(model.clipboardRecordingModel.title, defaultClipboardTitle);
+      expect(model.session.isPreviewReady, isFalse);
+      expect(model.session.isRecording, isFalse);
+    });
+  });
+
   group('RecordingViewModel.getClipboardContent', () {
     test(
       'updates state when clipboard contains valid mini program JSON',