don't proxy local URLs

packages/backend/src/server/web/UrlPreviewService.ts

@@ -68,12 +68,16 @@ export class UrlPreviewService {
 
 	@bindThis
 	private wrap(url?: string | null): string | null {
-		return url != null
+		if (url == null) return null;
-			? `${this.config.mediaProxy}/preview.webp?${query({
+
-				url,
+		// Don't proxy our own media
-				preview: '1',
+		if (this.utilityService.isUriLocal(url)) {
-			})}`
+			return url;
-			: null;
+		}
+
+		// But proxy everything else!
+		const mediaQuery = query({ url, preview: '1' });
+		return `${this.config.mediaProxy}/preview.webp?${mediaQuery}`;
 	}
 
 	@bindThis