feat: auto-translate furnidata per import (nl/en/de/fr/es/tr/it)

Generate localized FurnitureData_<lang>.json files from the master
FurnitureData.json + official Habbo hotel translations. Fetches per-hotel
furnidata with in-memory cache (6h TTL), maps by classname (* variant
aware), and overrides name/description where a translation exists.

Full rebuild after every batch/batch-regen/clone import and as admin
GET ?action=build-languages; single imports patch incrementally via
patchLocalizedFurniDataEntries. Failures are best-effort and never fail
the import itself. Files are written to every configured gamedata write
path (primary + mirrors) so /gamedata/config/FurnitureData_<lang>.json
is available for per-language Nitro clients.

New service: src/lib/services/furni-data-i18n.ts with
buildLocalizedFurniDataFiles, patchLocalizedFurniDataEntries,
FURNIDATA_LANGUAGES (nl/en/de/fr/es/tr/it) and applyTranslationsForTest.

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

@@ -14,6 +14,7 @@ import {
 	reconcileFurniDataWithItemsBase,
 	verifyAndFixSpriteIds,
 } from "@/lib/services/furni-data";
+import { buildLocalizedFurniDataFiles } from "@/lib/services/furni-data-i18n";
 import {
 	ensureFurniOwnership,
 	reconcileImportedOfferIds,
@@ -147,6 +148,11 @@ export const POST = withAdmin(
 					await rebuildCatalogOfferIds();
 					await verifyAndFixSpriteIds();
 					await verifyAndFixInteractionModesCount();
+					try {
+						await buildLocalizedFurniDataFiles();
+					} catch {
+						/* localized build failures are non-fatal */
+					}
 					await ensureFurniOwnership();
 					await syncAssetsToGamedataBundle();
 					await rcon.updateCatalog();