feat(housekeeping): unify complete rebuild in gated preview

src/lib/services/figure-import.ts

@@ -78,8 +78,10 @@ async function nitroPathFor(lib: string): Promise<string> {
 export async function importSingleFigure(params: {
 	lib: string;
 	onProgress?: (status: string) => void;
+	signal?: AbortSignal;
 }): Promise<ImportFigureResult> {
-	const { lib, onProgress } = params;
+	const { lib, onProgress, signal } = params;
+	signal?.throwIfAborted();
 	const warnings: string[] = [];
 	await ensureFigureDirs();
 
@@ -99,7 +101,10 @@ export async function importSingleFigure(params: {
 			error: `Could not resolve SWF URL: ${(err as Error).message}`,
 		};
 	}
-	const dl = await downloadFile(swfUrl, swfPath, { validate: "swf" });
+	const dl = await downloadFile(swfUrl, swfPath, {
+		validate: "swf",
+		signal,
+	});
 	if (!dl.ok)
 		return {
 			ok: false,
@@ -109,6 +114,7 @@ export async function importSingleFigure(params: {
 		};
 
 	onProgress?.("converting");
+	signal?.throwIfAborted();
 	try {
 		const swfBuffer = await fs.readFile(/*turbopackIgnore: true*/ swfPath);
 		const result = convertSwfToNitro(swfBuffer, lib);