fix: human fight timing, creative timer, TTS reliability, add sweary/vibe narrations

- Fix invisible characters in human mode: init live scene BEFORE starting
  challenge polling so entrance plays before first question appears
- Cap creative writing timer to 10s for multiple choice (just tapping buttons)
- Fix TTS reliability: precache priority phrases (Round 1-7, Fight!, K.O.)
  all at once instead of in slow batches; prevent duplicate precache runs
- Add 10 vibe-coded narrations (~20% chance): "I was vibe coded into existence"
- Add 15 sweary narrations (~30% chance): raw unhinged fight commentary
- Add sweary draw and retro narrations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/game/tts.ts

@@ -325,12 +325,30 @@ export async function initKokoro(onProgress?: (pct: number) => void): Promise<vo
   }
 }
 
-// Preload all static audio files into cache on startup (parallel fetch, no worker needed)
+// Preload all static audio files into cache on startup (no worker needed)
+let _precacheRunning = false
+let _precacheDone = false
 async function _precacheCommon() {
+  if (_precacheRunning || _precacheDone) return
+  _precacheRunning = true
   const entries = Object.entries(STATIC_AUDIO)
-  // Load in batches of 6 to avoid hammering the network
-  for (let i = 0; i < entries.length; i += 6) {
-    const batch = entries.slice(i, i + 6)
+  // Priority: load Round 1-7, Fight!, K.O., Finish it, Flawless, Devastating, Critical FIRST (all at once)
+  const priorityIds = new Set(['round_1','round_2','round_3','round_4','round_5','round_6','round_7','fight','ko','finish_it','flawless_victory','devastating','critical_hit'])
+  const priority = entries.filter(([, url]) => {
+    const id = url.split('/').pop()?.replace('.wav', '') || ''
+    return priorityIds.has(id)
+  })
+  const rest = entries.filter(e => !priority.includes(e))
+  // Load priority batch all at once (13 small wav files)
+  await Promise.all(priority.map(async ([key, url]) => {
+    try {
+      const buf = await _loadStaticAudio(url)
+      if (buf) audioCache.set(key, { buf, lastAccess: Date.now() })
+    } catch { /* non-critical */ }
+  }))
+  // Load the rest in batches of 8
+  for (let i = 0; i < rest.length; i += 8) {
+    const batch = rest.slice(i, i + 8)
     await Promise.all(batch.map(async ([key, url]) => {
       try {
         const buf = await _loadStaticAudio(url)
@@ -338,6 +356,8 @@ async function _precacheCommon() {
       } catch { /* non-critical */ }
     }))
   }
+  _precacheDone = true
+  _precacheRunning = false
 }
 
 function _cacheKey(text: string, profile: string): string {