feat: synthesize size 32 (catalog icon) frame for all furniture .nitro bundles

AddSize32ToBundle downscales the largest existing sprite (usually size 64)
to generate a 32 visualization, so every bundle — including the
source-provided gamedata furniture — carries a 32 frame without needing the
original SWF. AddSize32AllNitros rewrites every existing .nitro across all
nitro directories (incl. /var/www/Gamedata/bundled/furniture) and is
idempotent (bundles that already have 32 are skipped). Expose it via a Studio
button and the background admin endpoint POST /api/admin/import/furni/add-size32.

src/app/api/admin/import/furni/add-size32/route.ts

@@ -0,0 +1,97 @@
+import { withAdmin } from "@/lib/api-handler";
+import { apiError, apiOk } from "@/lib/api-response";
+import { PERMS } from "@/lib/permissions";
+import { logAudit } from "@/lib/services/audit";
+import { addSize32AllNitros } from "@/lib/services/repair-nitros";
+
+interface Size32Status {
+	running: boolean;
+	startedAt: number | null;
+	finishedAt: number | null;
+	succeeded: number;
+	failed: number;
+	skipped: number;
+	existing: number;
+	lastMessage: string | null;
+}
+
+const status: Size32Status = {
+	running: false,
+	startedAt: null,
+	finishedAt: null,
+	succeeded: 0,
+	failed: 0,
+	skipped: 0,
+	existing: 0,
+	lastMessage: null,
+};
+
+function runJob(userId: number) {
+	status.running = true;
+	status.startedAt = Date.now();
+	status.finishedAt = null;
+	status.succeeded = 0;
+	status.failed = 0;
+	status.skipped = 0;
+	status.existing = 0;
+	status.lastMessage = "started";
+
+	addSize32AllNitros((evt) => {
+		if (evt.type === "progress") {
+			if (evt.status === "done") status.succeeded++;
+			else if (evt.status === "convert-failed" || evt.status === "write-failed")
+				status.failed++;
+			else status.skipped++;
+			if (evt.message)
+				status.lastMessage = `${evt.classname}: ${evt.status} ${evt.message}`;
+		} else if (evt.type === "batch_complete") {
+			status.succeeded = evt.succeeded ?? 0;
+			status.failed = evt.failed ?? 0;
+			status.skipped = evt.skipped ?? 0;
+			status.existing = evt.existing ?? 0;
+			status.lastMessage = "done";
+		} else if (evt.type === "error") {
+			status.lastMessage = evt.message ?? null;
+		}
+	})
+		.then((result) => {
+			status.succeeded = result.succeeded;
+			status.failed = result.failed;
+			status.skipped = result.skipped;
+			status.existing = result.existing;
+			status.lastMessage = "done";
+			status.running = false;
+			status.finishedAt = Date.now();
+		})
+		.catch((err) => {
+			status.lastMessage = (err as Error).message;
+			status.running = false;
+			status.finishedAt = Date.now();
+		});
+
+	logAudit({
+		userId,
+		action: "furni_add_size32",
+		target: "FurniNitro",
+		targetId: 0,
+	});
+}
+
+export const POST = withAdmin(
+	{ permission: PERMS.ASSETS_IMPORT },
+	async (_request, ctx) => {
+		if (status.running) {
+			return apiOk({ ...status, alreadyRunning: true });
+		}
+		try {
+			runJob(ctx.session.user.id);
+			return apiOk({ ...status, started: true });
+		} catch (err) {
+			return apiError((err as Error).message, 500);
+		}
+	},
+);
+
+export const GET = withAdmin({ permission: PERMS.ASSETS_IMPORT }, async () => {
+	return apiOk({ ...status });
+});