Update Healer Man server

src/content/contentManager.ts

@@ -78,6 +78,7 @@ let initialization: Promise<void> | null = null;
 let installedStorageValidation: Promise<void> | null = null;
 let installedStorageValidationComplete = Object.keys(installedState.packs).length === 0;
 const validatedInstalledFiles = new Set<string>();
+const usablePackCache = new Map<string, boolean>();
 
 function safeLocalStorage(): Storage | null {
   try { return typeof window === "undefined" ? null : window.localStorage; } catch { return null; }
@@ -148,6 +149,9 @@ function persistInstalledState(): void {
 }
 
 function publish(patch: Partial<Omit<ContentManagerSnapshot, "revision">>): void {
+  // Every receipt/storage/manifest change publishes before notifying consumers.
+  // Cache both usable and unavailable packs until the next content revision.
+  usablePackCache.clear();
   snapshot = { ...snapshot, ...patch, revision: snapshot.revision + 1 };
   listeners.forEach((listener) => listener());
 }
@@ -364,7 +368,11 @@ function contentPackIsUsableInternal(packId: string, visiting: ReadonlySet<strin
 }
 
 export function contentPackIsUsable(packId: string): boolean {
-  return contentPackIsUsableInternal(packId, new Set());
+  const cached = usablePackCache.get(packId);
+  if (cached !== undefined) return cached;
+  const usable = contentPackIsUsableInternal(packId, new Set());
+  usablePackCache.set(packId, usable);
+  return usable;
 }
 
 /** Vite serves the complete source asset tree in development; shipped builds require an installed pack. */