perf: enable source-specific asset downloads and make nitro/icon URLs optional

Import improvements:
- importSingleFurni now accepts sourceSwfBaseUrl, nitroBaseUrl, iconBaseUrl
  params to try source-specific asset downloads before falling back to
  the official Habbo CDN (images.habbo.com)
- Source-specific URL cascade:
  1. Try sourceSwfBaseUrl/hof_furni/{rev}/{name}.swf
  2. Try sourceNitroBaseUrl/{name}.nitro (pre-made nitro bundles)
  3. Fallback to images.habbo.com/dcr/hof_furni/{rev}/{name}.swf
- Same fallback chain for icon downloads
- Clone sources can now have empty nitroBaseUrl/iconBaseUrl (retro
  hotels without nitro support)
- Added VirtualCity source (verified SWF downloads via virtualc.nl/dcr)
- Added sourceSwfBaseUrl field to CloneSource interface
- Both batch and single import routes pass source params through
- Clone POST route accepts sourceSwfBaseUrl, makes nitro/icon optional
- Nitro fallback download tries .nitro files before SWF conversion

src/app/api/admin/import/furni/route.ts

@@ -6,6 +6,7 @@ import { apiError, apiOk } from "@/lib/api-response";
 import { CatalogPages, db, ItemsBase } from "@/lib/db";
 import { PERMS } from "@/lib/permissions";
 import { logAudit } from "@/lib/services/audit";
+import { getSource } from "@/lib/services/clone-sources";
 import { getFurniAssetDirs } from "@/lib/services/furni-asset-dirs";
 import {
 	autoPriceFurni,
@@ -260,6 +261,10 @@ export const POST = withAdmin(
 
 		// ── Batch import ─────────────────────────────────────────────────
 		if (Array.isArray(body.items)) {
+			const { sourceId } = body as { sourceId?: string };
+			let source: Awaited<ReturnType<typeof getSource>> | null = null;
+			if (sourceId) source = await getSource(sourceId);
+
 			const results: Array<{
 				classname: string;
 				ok: boolean;
@@ -291,6 +296,9 @@ export const POST = withAdmin(
 						type: item.type ?? "flooritem",
 						revision: item.revision ?? 0,
 						category: item.category ?? "unknown",
+						sourceSwfBaseUrl: source?.sourceSwfBaseUrl,
+						nitroBaseUrl: source?.nitroBaseUrl || undefined,
+						iconBaseUrl: source?.iconBaseUrl || undefined,
 					});
 
 					results.push({ classname: item.classname, ...result });
@@ -341,10 +349,22 @@ export const POST = withAdmin(
 		}
 
 		// ── Single import ────────────────────────────────────────────────
-		const { id, classname, name, description, type, revision, category } = body;
+		const {
+			id,
+			classname,
+			name,
+			description,
+			type,
+			revision,
+			category,
+			sourceId,
+		} = body;
 
 		if (!classname || !name) return apiError("Missing classname or name", 400);
 
+		let source: Awaited<ReturnType<typeof getSource>> | null = null;
+		if (sourceId) source = await getSource(sourceId);
+
 		const result = await importSingleFurni({
 			id: id ?? 0,
 			classname,
@@ -353,6 +373,9 @@ export const POST = withAdmin(
 			type: type ?? "flooritem",
 			revision: revision ?? 0,
 			category: category ?? "unknown",
+			sourceSwfBaseUrl: source?.sourceSwfBaseUrl,
+			nitroBaseUrl: source?.nitroBaseUrl || undefined,
+			iconBaseUrl: source?.iconBaseUrl || undefined,
 		});
 
 		if (!result.ok) return apiError(result.error ?? "Import failed", 409);