Backfill missing nitros into the Gamedata bundle on import

After each single import, batch import and batch-regen, copy every
.nitro file that is missing from /var/www/Gamedata/bundled/furniture so
the emulator can render all imported furniture even when the mirror write
was skipped. Reports the copied files in the API/SSE response.

src/app/api/admin/import/furni/batch-regen/route.ts

@@ -11,7 +11,12 @@ import {
 	buildFurniEntry,
 	readFurniData,
 } from "@/lib/services/furni-data";
-import { downloadFile, ensureDirectories } from "@/lib/services/furni-import";
+import {
+	downloadFile,
+	ensureDirectories,
+	ensureFurniOwnership,
+	syncNitrosToGamedataBundle,
+} from "@/lib/services/furni-import";
 import { getOfficialHabboFurnidata } from "@/lib/services/habbo-furnidata-cache";
 import { rcon } from "@/lib/services/rcon";
 import { convertSwfToNitro } from "@/lib/services/swf-to-nitro";
@@ -254,12 +259,20 @@ export const POST = withAdmin(
 					/* non-fatal */
 				}
 
+				// Keep regenerated assets readable by the web server
+				const ownership = await ensureFurniOwnership();
+
+				// Backfill any missing nitros into the emulator's Gamedata bundle
+				const nitrosSynced = await syncNitrosToGamedataBundle();
+
 				send({
 					type: "regen_complete",
 					succeeded,
 					failed,
 					skipped,
 					furniDataAdded: furniDataEntries.length,
+					ownershipFixed: ownership.fixed,
+					nitrosSynced: nitrosSynced.copied,
 					duration: Date.now() - startTime,
 				});