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>

app/Models/ShortLink.php

@@ -38,9 +38,12 @@ class ShortLink extends Model
         return $this->hasMany(LinkClick::class);
     }
 
-    public function publicUrl(): string
+    public function publicUrl(?User $owner = null): string
     {
-        return self::publicBaseUrl().'/'.$this->slug;
+        $owner ??= $this->user;
+        $base = $owner ? $owner->publicLinkBaseUrl() : self::publicBaseUrl();
+
+        return rtrim($base, '/').'/'.$this->slug;
     }
 
     public static function publicBaseUrl(): string