Reapply "Add missing admin action files and navigation links"

This reverts commit 4d515bc400.

src/actions/radio-apply.ts

@@ -11,7 +11,9 @@ const TEXT_MAX = 5000;
 const STYLE_MAX = 5000;
 
 function str(form: FormData, key: string, max: number): string {
-  return String(form.get(key) ?? "").trim().slice(0, max);
+  return String(form.get(key) ?? "")
+    .trim()
+    .slice(0, max);
 }
 
 /**