fix(player): 调整双击飘心动画

test/player/player_double_tap_hearts_test.dart

@@ -13,12 +13,33 @@ void main() {
         home: Scaffold(body: PlayerDoubleTapHeartBurst(onCompleted: _noop)),
       ),
     );
-    await tester.pump(const Duration(milliseconds: 160));
+    await tester.pump(const Duration(milliseconds: 300));
 
     expect(find.byIcon(Icons.favorite_rounded), findsNWidgets(3));
-    expect(_size(tester, 0), 48);
-    expect(_size(tester, 1), 36);
-    expect(_size(tester, 2), 40);
+    expect(_size(tester, 0), 44);
+    expect(_size(tester, 1), 34);
+    expect(_size(tester, 2), 38);
+    expect(
+      tester
+          .widgetList<Stack>(
+            find.descendant(
+              of: find.byType(PlayerDoubleTapHeartBurst),
+              matching: find.byType(Stack),
+            ),
+          )
+          .every((stack) => stack.clipBehavior == Clip.none),
+      isTrue,
+    );
+  });
+
+  test('heart burst stays long and sparse', () {
+    expect(PlayerDoubleTapHeartBurst.singleHeartDurationMs, 1300);
+    expect(
+      PlayerDoubleTapHeartBurst.animationDuration,
+      greaterThanOrEqualTo(const Duration(milliseconds: 1200)),
+    );
+    expect(PlayerDoubleTapHeartBurst.particleCount, lessThanOrEqualTo(4));
+    expect(PlayerDoubleTapHeartBurst.particleCount, 3);
   });
 }