chore(player): 移除飘心毫秒调试文字

lib/pages/player/widgets/player_double_tap_hearts.dart

@@ -159,18 +159,6 @@ class _PlayerDoubleTapHeartBurstState extends State<PlayerDoubleTapHeartBurst> {
         children: [
           for (var index = 0; index < _hearts.length; index++)
             _heart(_hearts[index], _elapsedMs.toDouble(), index),
-          if (kDebugMode)
-            Positioned(
-              left: widget.origin.dx + 8,
-              top: widget.origin.dy + 10,
-              child: IgnorePointer(
-                child: Text(
-                  '${_elapsedMs}ms',
-                  key: const Key('heart-burst-elapsed-debug'),
-                  style: const TextStyle(color: Colors.white60, fontSize: 11),
-                ),
-              ),
-            ),
         ],
       ),
     );

test/player/player_double_tap_hearts_test.dart

@@ -26,11 +26,6 @@ void main() {
     expect(_size(tester, 0), 48);
     expect(_size(tester, 1), 36);
     expect(_size(tester, 2), 40);
-    final elapsedText = tester
-        .widget<Text>(find.byKey(const Key('heart-burst-elapsed-debug')))
-        .data!;
-    final elapsedMs = int.parse(elapsedText.replaceFirst('ms', ''));
-    expect(elapsedMs, inInclusiveRange(180, 220));
     expect(
       tester
           .widgetList<Stack>(
@@ -97,13 +92,6 @@ void main() {
       (tester.getCenter(firstHeart) - origin).distance,
       lessThanOrEqualTo(1),
     );
-    final debugTopLeft = tester.getTopLeft(
-      find.byKey(const Key('heart-burst-elapsed-debug')),
-    );
-    expect(
-      (debugTopLeft - const Offset(308, 556)).distance,
-      lessThanOrEqualTo(1),
-    );
 
     await _pumpHeartTime(tester, clock, const Duration(milliseconds: 750));
     final midpoint = tester.getCenter(firstHeart);

test/player/player_hearts_pixels_test.dart

@@ -50,12 +50,6 @@ void main() {
     expect(firstSize.height, closeTo(48, 1));
     expect(firstSize.width, greaterThan(20));
     expect((initialCenter - origin).distance, lessThanOrEqualTo(1));
-    expect(
-      (tester.getTopLeft(find.byKey(const Key('heart-burst-elapsed-debug'))) -
-              const Offset(308, 556))
-          .distance,
-      lessThanOrEqualTo(1),
-    );
 
     await _pumpHeartTime(tester, clock, const Duration(milliseconds: 300));
     final center300 = tester.getCenter(firstHeart);