fix: harden update pipeline and restore a clean production build

- update-Nitrov3.sh: build CMS into .next-staging and swap atomically so a
  failed build never takes the live site down; auto-merge new variables
  from .env.example; validate env for duplicates/broken lines; restart the
  emulator/CMS only when rebuilt or unhealthy; fix step renumbering
- next.config.ts: support NEXT_DIST_DIR for staged production builds
- fix all TS errors (unused imports, missing tryDownloadCandidates helper)
  so tsc and the production build pass clean
- add Dockerfile/.dockerignore and switch docker-compose to a CMS container
- include prevailing UI/refactor changes (SurfaceCard, ticketing, tsconfig)

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

@@ -271,7 +271,6 @@ import type {
 import {
 	finalizeLangFile,
 	finalizePatch,
-	lookupTranslation,
 	prepareLangFile,
 	preparePatch,
 } from "./furni-data-i18n-core";
@@ -283,10 +282,7 @@ export type {
 	PreparedPatch,
 	Translation,
 } from "./furni-data-i18n-core";
-export {
-	lookupTranslation,
-	officialIsRealTranslation,
-} from "./furni-data-i18n-core";
+export { lookupTranslation } from "./furni-data-i18n-core";
 
 export async function fetchTranslationsForHotel(
 	hotel: HabboGamedataHotel,
@@ -643,31 +639,3 @@ export async function patchLocalizedFurniDataEntries(
 }
 
 /** Visible for tests — apply translations to a furnidata clone in place. */
-export function applyTranslationsForTest(
-	data: Record<string, { furnitype: Array<Record<string, unknown>> }>,
-	translations: Map<string, Translation>,
-): { translatedRoom: number; translatedWall: number } {
-	let translatedRoom = 0;
-	let translatedWall = 0;
-	for (const section of ["roomitemtypes", "wallitemtypes"] as const) {
-		for (const entry of data[section]?.furnitype ?? []) {
-			const cn = typeof entry.classname === "string" ? entry.classname : "";
-			const t = lookupTranslation(translations, cn);
-			if (!t) continue;
-			let did = false;
-			if (t.name) {
-				entry.name = t.name;
-				did = true;
-			}
-			if (t.description) {
-				entry.description = t.description;
-				did = true;
-			}
-			if (did) {
-				if (section === "roomitemtypes") translatedRoom++;
-				else translatedWall++;
-			}
-		}
-	}
-	return { translatedRoom, translatedWall };
-}