fix(admin): harden clothing/pets/effects/clone imports

Align grids on data.items, only treat SSE done as success, hard-fail
clothing sets when libs fail, and add Cancel via AbortController.

Co-authored-by: Cursor <[email protected]>

src/lib/sse-client.ts

@@ -50,6 +50,7 @@ export async function runSseImport(
 	onDone: (classname: string) => void,
 	onComplete: (succeeded: number, failed: number) => void,
 	signal?: AbortSignal,
+	onFailed?: (classname: string, error?: string) => void,
 ): Promise<void> {
 	const res = await adminFetch(url, {
 		method: "POST",
@@ -57,8 +58,19 @@ export async function runSseImport(
 		body: JSON.stringify(body),
 		signal,
 	});
+	if (!res.ok) {
+		const data = await res.json().catch(() => ({}));
+		toast.error(
+			typeof data.error === "string"
+				? data.error
+				: `Import failed (${res.status})`,
+		);
+		onComplete(0, 0);
+		return;
+	}
 	if (!res.body) {
 		toast.error("No response stream");
+		onComplete(0, 0);
 		return;
 	}
 
@@ -68,11 +80,13 @@ export async function runSseImport(
 	await readSseStream(
 		res.body,
 		(evt) => {
-			if (
-				evt.type === "item_progress" &&
-				(evt.status === "done" || evt.status === "failed")
-			) {
-				onDone(String(evt.classname ?? ""));
+			if (evt.type === "item_progress") {
+				const classname = String(evt.classname ?? "");
+				if (evt.status === "done") {
+					onDone(classname);
+				} else if (evt.status === "failed") {
+					onFailed?.(classname, String(evt.error ?? ""));
+				}
 			}
 			if (evt.type === "batch_complete") {
 				succeeded = Number(evt.succeeded ?? 0);