fix: resolve critical bugs and improve admin panel reliability

- Fix missing await in pets API route causing empty responses
- Fix updateSetting to use upsert pattern instead of update-only
- Create missing /api/admin/sounds/upload route (upload was broken)
- Wire bulk delete actions in catalog table
- Replace native confirm() with useConfirmDialog() across rooms and clone pages
- Add error logging to silent catch blocks in radio actions and audit route
- Add graceful degradation to devops health endpoint
- Add cache eviction to clone icon route to prevent memory leak
- Internationalize hardcoded Italian strings to English
- Remove placeholder created_at fields from prefix API responses
- Remove dead code and fix type errors in translations and import pages
- Standardize PERMS import path in analytics export route

src/app/api/admin/import/clone/icon/route.ts

@@ -7,6 +7,15 @@ import { getSource } from "@/lib/services/clone-sources";
 // In-process cache of extracted icons, keyed by source+classname.
 // null = known-missing (don't refetch the bundle every render).
 const iconCache = new Map<string, Buffer | null>();
+const MAX_ICON_CACHE_SIZE = 500;
+
+function pruneIconCache() {
+	while (iconCache.size > MAX_ICON_CACHE_SIZE) {
+		const oldest = iconCache.keys().next().value;
+		if (oldest === undefined) break;
+		iconCache.delete(oldest);
+	}
+}
 
 // GET ?source=<id>&classname=<cn>
 // Fetches the source's .nitro bundle and returns the embedded furni icon as a
@@ -39,6 +48,7 @@ export const GET = withAdmin(
 				}
 				icon = extractFurniIconPng(Buffer.from(await res.arrayBuffer()));
 				iconCache.set(cacheKey, icon);
+				pruneIconCache();
 			} catch {
 				iconCache.set(cacheKey, null);
 				return apiError("Failed to fetch bundle", 502);