fix(flutter): 优化观看历史删除按钮

test/watch/watch_records_page_test.dart

@@ -69,8 +69,10 @@ void main() {
       tester.getSize(
         find.byKey(const Key('watch-record-remove-the-signal-demo')),
       ),
-      const Size(28, 28),
+      const Size(32, 32),
     );
+    expect(find.byIcon(Icons.delete_outline_rounded), findsOneWidget);
+    expect(find.byIcon(Icons.close_rounded), findsNothing);
     expect(
       find.byKey(const Key('watch-record-episode-the-signal-demo')),
       findsOneWidget,