perf(studio): cache nitro scan, stream progress, virtualize cleanup list

src/lib/services/furni-import-cache.ts

@@ -16,7 +16,11 @@ import { existsSync } from "node:fs";
 import path from "node:path";
 import { sql } from "drizzle-orm";
 import { db, ItemsBase, queryRows } from "@/lib/db";
-import { normalizeClassname } from "@/lib/furni/classname";
+import {
+	getBaseClassname,
+	getSafeClassnameStem,
+	normalizeClassname,
+} from "@/lib/furni/classname";
 import { indexLocalFurniture } from "@/lib/furni/local-presence";
 import { readFurniData } from "./furni-data";
 
@@ -107,6 +111,58 @@ export async function getCatalogIdSet(): Promise<Set<number>> {
 
 const nitroPresenceCache = new Map<string, boolean>();
 
+/** Every classname stem a `.nitro`/`.swf`/icon file may legitimately use. */
+function addClassnameStem(set: Set<string>, classname: string): void {
+	const normalized = classname.trim().toLowerCase();
+	if (!normalized) return;
+	const base = getBaseClassname(normalized).toLowerCase();
+	if (base) set.add(base);
+	if (normalized.includes("*")) {
+		const safe = getSafeClassnameStem(normalized).toLowerCase();
+		if (safe) set.add(safe);
+	}
+}
+
+let cleanupStemsSnapshot: { set: Set<string>; timestamp: number } | null = null;
+
+/**
+ * Authoritative stems for the nitro-cleanup scan: every `item_name` plus the
+ * `public_name` fallback (mirroring repair-nitros.ts resolution). Cached the
+ * same way as the Studio listings so repeated scans (auto-clean, panel) don't
+ * re-query `items_base` on every call.
+ */
+export async function getCleanupValidStems(): Promise<Set<string>> {
+	const now = Date.now();
+	if (
+		cleanupStemsSnapshot &&
+		now - cleanupStemsSnapshot.timestamp < CACHE_TTL
+	) {
+		return cleanupStemsSnapshot.set;
+	}
+	const set = new Set<string>();
+	try {
+		const rows = await queryRows<{
+			item_name: string;
+			public_name: string;
+		}>(sql`SELECT item_name, public_name FROM items_base`);
+		for (const row of rows) {
+			addClassnameStem(set, row.item_name);
+			if (
+				row.public_name &&
+				row.public_name !== row.item_name &&
+				!row.public_name.includes(" ") &&
+				row.public_name !== "0"
+			) {
+				addClassnameStem(set, row.public_name);
+			}
+		}
+	} catch {
+		/* empty set → every asset is treated as orphaned */
+	}
+	cleanupStemsSnapshot = { set, timestamp: now };
+	return set;
+}
+
 /** `existsSync` memoized per (dir + base) — nitro files change rarely. */
 export function nitroExistsCached(dir: string, base: string): boolean {
 	const key = `${dir}/${base}`;
@@ -210,5 +266,6 @@ export function clearFurniImportCache(): void {
 	furniDataSetSnapshot = null;
 	catalogIdsSnapshot = null;
 	nitroPresenceCache.clear();
+	cleanupStemsSnapshot = null;
 	statsSnapshot = null;
 }