fix(player): 使用根Overlay渲染飘心

lib/pages/player/widgets/player_double_tap_hearts.dart

@@ -17,10 +17,6 @@ class PlayerDoubleTapHeartBurst extends StatefulWidget {
     this.origin = Offset.zero,
   });
 
-  static const int minParticleCount = 4;
-  static const int maxParticleCount = 5;
-  static const int minimumBurstDurationMs = 2000;
-
   final int burstId;
   final VoidCallback onCompleted;
   final Random? random;
@@ -55,43 +51,22 @@ class _PlayerDoubleTapHeartBurstState extends State<PlayerDoubleTapHeartBurst>
     _lifetime.start();
     final random = widget.random ?? Random();
     var delay = 0;
-    _particles = List.generate(
-      PlayerDoubleTapHeartBurst.minParticleCount +
-          random.nextInt(
-            PlayerDoubleTapHeartBurst.maxParticleCount -
-                PlayerDoubleTapHeartBurst.minParticleCount +
-                1,
-          ),
-      (index) {
-        if (index > 0) delay += 80 + random.nextInt(41);
-        return _HeartParticle(
-          delay: delay,
-          duration: 1500 + random.nextInt(301),
-          travel: 100 + random.nextInt(31),
-          drift: -30 + random.nextInt(61),
-          size: (22 + random.nextInt(13)).toDouble(),
-          color: random.nextBool()
-              ? AppColors.doubleTapHeartRed
-              : AppColors.doubleTapHeartPink,
-        );
-      },
-    );
-    var total = _particles
+    _particles = List.generate(6 + random.nextInt(3), (index) {
+      if (index > 0) delay += 40 + random.nextInt(21);
+      return _HeartParticle(
+        delay: delay,
+        duration: 700 + random.nextInt(201),
+        travel: 120 + random.nextInt(41),
+        drift: -30 + random.nextInt(61),
+        size: (22 + random.nextInt(13)).toDouble(),
+        color: random.nextBool()
+            ? AppColors.doubleTapHeartRed
+            : AppColors.doubleTapHeartPink,
+      );
+    });
+    final total = _particles
         .map((particle) => particle.delay + particle.duration)
         .reduce(max);
-    if (total < PlayerDoubleTapHeartBurst.minimumBurstDurationMs) {
-      final last = _particles.last;
-      final requiredDuration =
-          PlayerDoubleTapHeartBurst.minimumBurstDurationMs - last.delay;
-      final adjustedDuration = max(
-        last.duration,
-        requiredDuration,
-      ).clamp(1500, 1800).toInt();
-      _particles[_particles.length - 1] = last.withDuration(adjustedDuration);
-      total = _particles
-          .map((particle) => particle.delay + particle.duration)
-          .reduce(max);
-    }
     if (kDebugMode) {
       debugPrint('[player] phase=heart-burst-init id=${widget.burstId}');
       debugPrint(
@@ -143,21 +118,20 @@ class _PlayerDoubleTapHeartBurstState extends State<PlayerDoubleTapHeartBurst>
   @override
   Widget build(BuildContext context) {
     return IgnorePointer(
-      child: SizedBox.shrink(
-        child: AnimatedBuilder(
-          animation: _controller,
-          builder: (context, _) {
-            final elapsed =
-                _controller.value * _controller.duration!.inMilliseconds;
-            return Stack(
-              clipBehavior: Clip.none,
-              children: [
-                for (var index = 0; index < _particles.length; index++)
-                  _particle(_particles[index], elapsed, index),
-              ],
-            );
-          },
-        ),
+      child: AnimatedBuilder(
+        animation: _controller,
+        builder: (context, _) {
+          final elapsed =
+              _controller.value * _controller.duration!.inMilliseconds;
+          return Stack(
+            fit: StackFit.expand,
+            clipBehavior: Clip.none,
+            children: [
+              for (var index = 0; index < _particles.length; index++)
+                _particle(_particles[index], elapsed, index),
+            ],
+          );
+        },
       ),
     );
   }
@@ -171,8 +145,8 @@ class _PlayerDoubleTapHeartBurstState extends State<PlayerDoubleTapHeartBurst>
     final move = Curves.easeOutCubic.transform(progress);
     final scale = PlayerDoubleTapHeartBurst.scaleForProgress(progress);
     return Positioned(
-      left: particle.drift * move - particle.size / 2,
-      top: -particle.size / 2 - particle.travel * move,
+      left: widget.origin.dx + particle.drift * move - particle.size / 2,
+      top: widget.origin.dy - particle.size / 2 - particle.travel * move,
       child: Opacity(
         opacity: PlayerDoubleTapHeartBurst.opacityForProgress(progress),
         child: Transform.scale(
@@ -205,15 +179,4 @@ class _HeartParticle {
   final int drift;
   final double size;
   final Color color;
-
-  _HeartParticle withDuration(int nextDuration) {
-    return _HeartParticle(
-      delay: delay,
-      duration: nextDuration,
-      travel: travel,
-      drift: drift,
-      size: size,
-      color: color,
-    );
-  }
 }

lib/pages/player/widgets/player_tap_gesture_region.dart

@@ -170,9 +170,7 @@ class _PlayerTapGestureRegionState extends State<PlayerTapGestureRegion> {
     final id = _nextHeartBurstId++;
     late final OverlayEntry entry;
     entry = OverlayEntry(
-      builder: (context) => Positioned(
-        left: origin.dx,
-        top: origin.dy,
+      builder: (context) => Positioned.fill(
         child: IgnorePointer(
           child: PlayerDoubleTapHeartBurst(
             key: ValueKey('heart-overlay-$id'),