Enhaced m3 motion

lib/theme/m3_motion.dart

@@ -786,13 +786,11 @@ class _M3ErrorShakeState extends State<M3ErrorShake>
 // M3BounceIcon — entrance + idle pulse for empty/error states
 // ═══════════════════════════════════════════════════════════════
 
-/// Displays an [icon] inside a colored circular badge with:
-/// 1. A spring-bounce entrance animation on first build.
-/// 2. A slow, gentle idle pulse (scale 1.0 → 1.06 → 1.0) that repeats
-///    indefinitely to draw attention without being distracting.
+/// Displays an [icon] inside a colored circular badge with a spring-bounce
+/// entrance animation: scales from 0 → 1.0 with a slight overshoot.
 ///
-/// Respects [m3ReducedMotion] — both animations are skipped when reduced
-/// motion is enabled.
+/// Respects [m3ReducedMotion] — the animation is skipped when reduced
+/// motion is enabled, showing the badge immediately.
 class M3BounceIcon extends StatefulWidget {
   const M3BounceIcon({
     super.key,
@@ -814,36 +812,22 @@ class M3BounceIcon extends StatefulWidget {
 }
 
 class _M3BounceIconState extends State<M3BounceIcon>
-    with TickerProviderStateMixin {
+    with SingleTickerProviderStateMixin {
   late final AnimationController _entranceCtrl;
-  late final AnimationController _pulseCtrl;
   late final Animation<double> _entrance;
-  late final Animation<double> _pulse;
 
   @override
   void initState() {
     super.initState();
-
-    // Entrance: scale 0 → 1.0 with spring overshoot.
+    // One-shot spring entrance: scale 0 → 1.0 with natural overshoot.
     _entranceCtrl = AnimationController(vsync: this, duration: M3Motion.long);
     _entrance = CurvedAnimation(parent: _entranceCtrl, curve: M3Motion.spring);
-
-    // Idle pulse: 1.0 → 1.06 → 1.0, repeating every 2.5 s.
-    _pulseCtrl = AnimationController(
-      vsync: this,
-      duration: const Duration(milliseconds: 2500),
-    )..repeat(reverse: true);
-    _pulse = Tween<double>(begin: 1.0, end: 1.06).animate(
-      CurvedAnimation(parent: _pulseCtrl, curve: Curves.easeInOut),
-    );
-
     _entranceCtrl.forward();
   }
 
   @override
   void dispose() {
     _entranceCtrl.dispose();
-    _pulseCtrl.dispose();
     super.dispose();
   }
 
@@ -861,15 +845,7 @@ class _M3BounceIconState extends State<M3BounceIcon>
 
     if (m3ReducedMotion(context)) return badge;
 
-    return ScaleTransition(
-      scale: _entrance,
-      child: AnimatedBuilder(
-        animation: _pulse,
-        builder: (_, child) =>
-            Transform.scale(scale: _pulse.value, child: child),
-        child: badge,
-      ),
-    );
+    return ScaleTransition(scale: _entrance, child: badge);
   }
 }