Update Healer Man server

src/game/combatAudio.ts

@@ -11,6 +11,8 @@ import {
 } from "./combatMediaPack";
 
 const MAX_COMBAT_VOICES = 32;
+const MAX_CACHED_AUDIO_BUFFERS = 64;
+const MAX_CACHED_AUDIO_BYTES = 32 * 1024 * 1024;
 
 interface ActiveVoice {
   readonly group: CombatActorGroup;
@@ -34,6 +36,23 @@ const activeVoices: ActiveVoice[] = [];
 const activeCastLoops = new Map<string, ActiveCastLoop>();
 const activeMasterVoices = new Set<() => void>();
 const decodedBuffers = new Map<string, Promise<AudioBuffer | null>>();
+const decodedBufferBytes = new Map<string, number>();
+let cachedAudioBytes = 0;
+
+function removeCachedAudio(url: string): void {
+  decodedBuffers.delete(url);
+  cachedAudioBytes -= decodedBufferBytes.get(url) ?? 0;
+  decodedBufferBytes.delete(url);
+}
+
+function trimCachedAudio(): void {
+  while (decodedBuffers.size > MAX_CACHED_AUDIO_BUFFERS || cachedAudioBytes > MAX_CACHED_AUDIO_BYTES) {
+    const oldest = decodedBuffers.keys().next().value;
+    if (oldest === undefined) break;
+    // Active sources retain their own buffer; eviction never stops playback.
+    removeCachedAudio(oldest);
+  }
+}
 
 export function masterAudioOutputEnabled(masterVolume: number): boolean {
   return Number.isFinite(masterVolume) && masterVolume > 0;
@@ -222,13 +241,31 @@ function soundsForEvent(event: CombatPresentationEvent): readonly CombatEffectSo
 async function decodeAudio(url: string): Promise<AudioBuffer | null> {
   const audioContext = ensureContext();
   if (!audioContext) return null;
-  if (!decodedBuffers.has(url)) {
-    decodedBuffers.set(url, fetchOptionalMediaAsset(url)
-      .then((response) => response.ok ? response.arrayBuffer() : Promise.reject(new Error(String(response.status))))
-      .then((data) => audioContext.decodeAudioData(data))
-      .catch(() => null));
+  const cached = decodedBuffers.get(url);
+  if (cached) {
+    decodedBuffers.delete(url);
+    decodedBuffers.set(url, cached);
+    return cached;
   }
-  return decodedBuffers.get(url)!;
+  const request = fetchOptionalMediaAsset(url)
+    .then((response) => response.ok ? response.arrayBuffer() : Promise.reject(new Error(String(response.status))))
+    .then((data) => audioContext.decodeAudioData(data))
+    .then((buffer) => {
+      if (decodedBuffers.get(url) === request) {
+        const bytes = buffer.length * buffer.numberOfChannels * Float32Array.BYTES_PER_ELEMENT;
+        decodedBufferBytes.set(url, Number.isFinite(bytes) ? Math.max(0, bytes) : 0);
+        cachedAudioBytes += decodedBufferBytes.get(url)!;
+        trimCachedAudio();
+      }
+      return buffer;
+    })
+    .catch(() => {
+      if (decodedBuffers.get(url) === request) removeCachedAudio(url);
+      return null;
+    });
+  decodedBuffers.set(url, request);
+  trimCachedAudio();
+  return request;
 }
 
 export async function playMasterAudioCue(