feat: add bark battle debug feedback

src/games/bark-battle/ui/BarkBattleHud.css

@@ -46,9 +46,11 @@
 }
 
 .bark-battle-dog {
+  position: relative;
   display: grid;
   place-items: center;
   gap: 8px;
+  animation: barkBattleDogPulse 420ms ease-out;
 }
 
 .bark-battle-dog__body {
@@ -61,11 +63,29 @@
 }
 
 .bark-battle-dog__label,
+.bark-battle-dog__burst,
 .bark-battle-vs {
   font-weight: 900;
   text-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
 }
 
+.bark-battle-dog__burst {
+  position: absolute;
+  top: -18px;
+  border-radius: 999px;
+  padding: 5px 10px;
+  color: #1f1147;
+  background: #facc15;
+  box-shadow: 0 0 22px rgba(250, 204, 21, 0.72);
+  animation: barkBattleBurst 640ms ease-out both;
+}
+
+.bark-battle-dog--opponent .bark-battle-dog__burst {
+  color: #fff7ed;
+  background: #7c3aed;
+  box-shadow: 0 0 22px rgba(124, 58, 237, 0.72);
+}
+
 .bark-battle-vs {
   border-radius: 999px;
   padding: 10px 18px;
@@ -176,6 +196,27 @@
   margin-top: 10px;
 }
 
+.bark-battle-debug-metrics,
+.bark-battle-debug-events {
+  margin: 10px 0 0;
+  padding: 10px;
+  border-radius: 16px;
+  background: rgba(255, 255, 255, 0.1);
+  font-size: 12px;
+}
+
+.bark-battle-debug-metrics {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 6px;
+}
+
+.bark-battle-debug-events {
+  display: grid;
+  gap: 4px;
+  padding-left: 28px;
+}
+
 .bark-battle-debug-panel__controls button {
   flex: 1;
   border: 0;
@@ -186,6 +227,18 @@
   font-weight: 800;
 }
 
+@keyframes barkBattleDogPulse {
+  from { transform: scale(1); }
+  45% { transform: scale(1.08); }
+  to { transform: scale(1); }
+}
+
+@keyframes barkBattleBurst {
+  from { transform: translateY(18px) scale(0.72); opacity: 0; }
+  35% { opacity: 1; }
+  to { transform: translateY(-38px) scale(1.16); opacity: 0; }
+}
+
 @keyframes barkBattleParticlePop {
   from { transform: translateY(28px) scale(0.7); opacity: 0; }
   42% { opacity: 1; }