fix: remove repository link display on missing param errors (#4560)

* fix: remove repository link display on missing param errors

* fix tests

---------

Co-authored-by: Alexandr <qwerty541zxc@gmail.com>

api/pin.js

@@ -8,7 +8,10 @@ import {
   setCacheHeaders,
   setErrorCacheHeaders,
 } from "../src/common/cache.js";
-import { retrieveSecondaryMessage } from "../src/common/error.js";
+import {
+  MissingParamError,
+  retrieveSecondaryMessage,
+} from "../src/common/error.js";
 import { parseBoolean, renderError } from "../src/common/utils.js";
 import { fetchRepo } from "../src/fetchers/repo.js";
 import { isLocaleAvailable } from "../src/translations.js";
@@ -105,6 +108,7 @@ export default async (req, res) => {
             bg_color,
             border_color,
             theme,
+            show_repo_link: !(err instanceof MissingParamError),
           },
         }),
       );