fix(player): 固定评论输入浮层位置避免收键盘跳动

test/comment/drama_comments_sheet_test.dart

@@ -469,6 +469,60 @@ void main() {
     expect(tester.getBottomLeft(composer).dy, closeTo(844, 0.1));
   });
 
+  testWidgets(
+    'should_keep_composer_position_when_keyboard_insets_change_after_settling',
+    (tester) async {
+      tester.view.physicalSize = const Size(390, 2200);
+      tester.view.devicePixelRatio = 1;
+      addTearDown(tester.view.resetPhysicalSize);
+      addTearDown(tester.view.resetDevicePixelRatio);
+      addTearDown(tester.view.resetViewInsets);
+      final repository = FakeCommentRepository(
+        pages: [
+          CommentPage(
+            comments: [commentFixture(id: '10', content: 'A comment')],
+          ),
+        ],
+      );
+
+      await _pumpSheet(tester, repository: repository);
+      await tester.tap(find.byKey(const Key('comment-input-placeholder')));
+      await tester.pumpAndSettle();
+
+      final composer = find.byKey(const Key('comment-composer-sheet'));
+      expect(composer, findsOneWidget);
+
+      tester.view.viewInsets = const FakeViewPadding(bottom: 1100);
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 90));
+      final settledTop = tester.getTopLeft(composer).dy;
+      final settledBottom = tester.getBottomLeft(composer).dy;
+      final settledHeight = tester.getSize(composer).height;
+      expect(settledBottom, closeTo(2200 - 1100, 0.1));
+
+      tester.view.viewInsets = const FakeViewPadding(bottom: 1150);
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 90));
+      expect(tester.getTopLeft(composer).dy, closeTo(settledTop, 0.1));
+      expect(tester.getBottomLeft(composer).dy, closeTo(settledBottom, 0.1));
+      expect(tester.getSize(composer).height, closeTo(settledHeight, 0.1));
+
+      tester.view.viewInsets = const FakeViewPadding(bottom: 600);
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 90));
+      expect(tester.getTopLeft(composer).dy, closeTo(settledTop, 0.1));
+      expect(tester.getBottomLeft(composer).dy, closeTo(settledBottom, 0.1));
+      expect(tester.getSize(composer).height, closeTo(settledHeight, 0.1));
+
+      tester.view.viewInsets = const FakeViewPadding();
+      await tester.pumpAndSettle();
+      expect(composer, findsOneWidget);
+      expect(tester.getTopLeft(composer).dy, closeTo(settledTop, 0.1));
+      expect(tester.getBottomLeft(composer).dy, closeTo(settledBottom, 0.1));
+      expect(tester.getSize(composer).height, closeTo(settledHeight, 0.1));
+    },
+  );
+
   testWidgets('should_keep_composer_open_after_input_loses_focus', (
     tester,
   ) async {