chore: disable url search params in robots.txt

also add preview.png (I forgot yet again)

src/app/robots.ts

@@ -5,7 +5,19 @@ export default function robots(): MetadataRoute.Robots {
 		rules: {
 			userAgent: "*",
 			allow: "/",
-			disallow: ["/create-username", "/edit/*", "/profile/settings", "/random", "/submit", "/report/mii/*", "/report/user/*", "/admin"],
+			disallow: [
+				"/*?page",
+				"/*?tags",
+				"/*?sort",
+				"/create-username",
+				"/edit/*",
+				"/profile/settings",
+				"/random",
+				"/submit",
+				"/report/mii/*",
+				"/report/user/*",
+				"/admin",
+			],
 		},
 		sitemap: `${process.env.BASE_URL}/sitemap.xml`,
 	};