fixes

frontend/src/pages/FightPage.vue

@@ -87,6 +87,7 @@ function spawnLiveReactionEmoji(key: string) {
 const showOverlay = computed(() => replayDone.value && !isRequeueing.value && !autoBattle.value)
 
 let _pageDestroyed = false
+let _initializingLiveScene = false
 function sleep(ms: number): Promise<void> {
   return new Promise((resolve, reject) => {
     setTimeout(() => {
@@ -118,8 +119,11 @@ const tierClass = (t: number) => `tier-${t}`
 
 // --- Live scene management ---
 async function initLiveScene() {
+  if (_initializingLiveScene || _pageDestroyed) return
+  _initializingLiveScene = true
+
   const data = liveFightData.value
-  if (!data?.botA || !data?.botB || !liveCanvas.value) return
+  if (!data?.botA || !data?.botB || !liveCanvas.value) { _initializingLiveScene = false; return }
 
   if (liveScene) { liveScene.destroy(); liveScene = null }
 
@@ -147,6 +151,8 @@ async function initLiveScene() {
   } catch (err) {
     console.error('[FightPage] createFightScene failed:', err)
     liveScene = null
+  } finally {
+    _initializingLiveScene = false
   }
 
   liveSceneReady.value = true
@@ -167,7 +173,8 @@ async function initLiveScene() {
       console.warn('[FightPage] entrance failed:', err)
     }
     // Safety: ensure fighters are visible after entrance (prevents invisible characters on mobile)
-    liveScene._resetPositions()
+    // Re-check: scene could be destroyed during async playEntrance()
+    liveScene?._resetPositions()
     setEntrancePlaying(false)
   }
 
@@ -311,7 +318,7 @@ async function handleRoundEnd(data: any) {
       console.warn('[FightPage] playRound animation failed:', err)
     }
 
-    if (aWon || bWon) {
+    if (liveScene && (aWon || bWon)) {
       await liveScene.playTaunt(aWon ? 'a' : 'b')
     }
   }