fix(flutter): 优化观看历史删除按钮

lib/pages/watch_records/widgets/watch_record_card.dart

@@ -14,8 +14,8 @@ const double _cardPadding = 10;
 const double _coverWidth = 72;
 const double _coverHeight = 96;
 const double _coverRadius = 10;
-const double _removeSize = 28;
+const double _removeSize = 32;
-const double _removeIconSize = 16;
+const double _removeIconSize = 18;
 const double _progressHeight = 4;
 const double _progressRadius = 2;
 const double _statsFontSize = 12;
@@ -190,7 +190,7 @@ class WatchRecordCard extends StatelessWidget {
           padding: EdgeInsets.zero,
           onPressed: onRemove,
           icon: const Icon(
-            Icons.close_rounded,
+            Icons.delete_outline_rounded,
             size: _removeIconSize,
             color: AppColors.muted,
           ),

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,