Expand Link app with analytics, settings, and custom domains.

Add Bitly-style branded domain support via Ladill Domains SSL API,
account analytics dashboard, settings page with default domain picker,
and fix SSO/dashboard issues from QR Plus template leftovers.

Co-authored-by: Cursor <cursoragent@cursor.com>

config/identity.php

@@ -2,5 +2,5 @@
 
 return [
     'api_url' => env('IDENTITY_API_URL', 'https://ladill.com/api'),
-    'api_key' => env('IDENTITY_API_KEY_HOSTING'),
+    'api_key' => env('IDENTITY_API_KEY_LINK'),
 ];