feat: per-import translation toggle and language picker in studio

Furni imports can now choose whether to translate (per import) and which
languages to build, instead of always rebuilding all 13 FurnitureData_<lang>
files. The studio header also has a global switch that persists the
furnidata_translate_enabled setting, seeding the per-import default.

src/lib/services/furni-data-i18n.ts

@@ -433,6 +433,7 @@ function cloneFurniData(
  */
 export async function buildLocalizedFurniDataFiles(
 	force = false,
+	langs?: readonly string[],
 ): Promise<LanguageFileResult[]> {
 	if (!force && !(await translationEnabled())) {
 		logger.debug(
@@ -440,6 +441,10 @@ export async function buildLocalizedFurniDataFiles(
 		);
 		return [];
 	}
+	const langsToBuild =
+		langs && langs.length > 0
+			? FURNIDATA_LANGUAGES.filter((l) => langs.includes(l.lang))
+			: FURNIDATA_LANGUAGES;
 	return withFurniDataLock(async () => {
 		const master = (await readFurniData()) as Record<
 			string,
@@ -448,7 +453,7 @@ export async function buildLocalizedFurniDataFiles(
 
 		// Fetch all language maps in parallel (uses per-hotel memory cache).
 		const maps = await Promise.all(
-			FURNIDATA_LANGUAGES.map(async ({ lang, hotel }) => {
+			langsToBuild.map(async ({ lang, hotel }) => {
 				const map = await fetchTranslationsForHotel(hotel);
 				return { lang, hotel, map };
 			}),
@@ -577,6 +582,7 @@ export async function buildLocalizedFurniDataFiles(
 export async function patchLocalizedFurniDataEntries(
 	entries: Array<{ classname: string; name?: string; description?: string }>,
 	force = false,
+	langs?: readonly string[],
 ): Promise<LanguageFileResult[]> {
 	if (entries.length === 0) return [];
 	if (!force && !(await translationEnabled())) {
@@ -586,9 +592,14 @@ export async function patchLocalizedFurniDataEntries(
 		return [];
 	}
 
+	const langsToBuild =
+		langs && langs.length > 0
+			? FURNIDATA_LANGUAGES.filter((l) => langs.includes(l.lang))
+			: FURNIDATA_LANGUAGES;
+
 	return withFurniDataLock(async () => {
 		const maps = await Promise.all(
-			FURNIDATA_LANGUAGES.map(async ({ lang, hotel }) => {
+			langsToBuild.map(async ({ lang, hotel }) => {
 				const map = await fetchTranslationsForHotel(hotel);
 				return { lang, hotel, map };
 			}),