fix(catalog): stream single imports and preserve response errors

src/components/admin/studio/studio-client.tsx

@@ -60,6 +60,7 @@ import {
 	type AutoCatalogPreview,
 	previewAutoCatalog,
 } from "@/lib/furni/auto-catalog";
+import { readImportResponse } from "@/lib/furni/import-response";
 import type { FurniImportSource } from "@/lib/habbo-gamedata-hotel";
 import { readSseStream } from "@/lib/sse-client";
 import { cn } from "@/lib/utils";
@@ -690,7 +691,10 @@ export function StudioClient({
 		try {
 			const res = await adminFetch("/api/admin/import/furni", {
 				method: "POST",
-				headers: { "Content-Type": "application/json" },
+				headers: {
+					"Content-Type": "application/json",
+					Accept: "text/event-stream",
+				},
 				body: JSON.stringify({
 					repairExisting: true,
 					id: item.id,
@@ -706,8 +710,8 @@ export function StudioClient({
 						translate && translateLangs.length > 0 ? translateLangs : undefined,
 				}),
 			});
-			const data = await res.json();
-			if (res.ok) {
+			const { status, data } = await readImportResponse(res);
+			if (status >= 200 && status < 300) {
 				setItems((prev) =>
 					prev.map((i) =>
 						i.classname === item.classname
@@ -727,15 +731,26 @@ export function StudioClient({
 						`verified: ${data.offerIdsFixed} offer_id, ${data.furniDataFixedIds} furnidata id`,
 					);
 				}
-				if (data.furniDataMissing > 0) {
+				if (
+					typeof data.furniDataMissing === "number" &&
+					data.furniDataMissing > 0
+				) {
 					parts.push(`${data.furniDataMissing} furnidata missing`);
 				}
 				toast.success(parts.join(" · "));
 			} else {
-				toast.error(data.error || `Import failed for ${item.classname}`);
+				toast.error(
+					typeof data.error === "string"
+						? data.error
+						: `Import failed for ${item.classname}`,
+				);
 			}
-		} catch {
-			toast.error("Network error");
+		} catch (error) {
+			toast.error(
+				error instanceof Error
+					? error.message
+					: "Import connection failed. Check the furniture status before retrying.",
+			);
 		} finally {
 			setImportingId(null);
 		}