Wire LadillLink through QrCode model and remaining QR surfaces.

Public URLs, encoded payloads, slug preview, payment callbacks, and asset paths now use ladl.link instead of ladill.com/q/*.

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

app/Models/QrCode.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Support\LadillLink;
 use App\Support\Qr\QrStyleDefaults;
 use App\Support\Qr\QrTypeCatalog;
 use App\Support\Qr\QrWifiPayload;
@@ -83,23 +84,19 @@ class QrCode extends Model
 
     public function publicUrl(): string
     {
-        return self::publicBaseUrl() . '/q/' . $this->short_code;
+        return LadillLink::url($this->short_code);
+    }
+
+    public function publicPath(string $suffix = ''): string
+    {
+        return $suffix === ''
+            ? $this->publicUrl()
+            : LadillLink::path($this->short_code, $suffix);
     }
 
-    /**
-     * Base URL for public QR links. Always the short platform domain
-     * (ladill.com) — never the signed-in account/product host — so printed
-     * codes and shared links stay short and host-independent of where the QR
-     * was created.
-     */
     public static function publicBaseUrl(): string
     {
-        $appUrl = (string) config('app.url');
-        $scheme = parse_url($appUrl, PHP_URL_SCHEME) ?: 'https';
-        $host = (string) config('app.platform_domain')
-            ?: (parse_url($appUrl, PHP_URL_HOST) ?: 'ladill.com');
-
-        return $scheme . '://' . $host;
+        return LadillLink::baseUrl();
     }
 
     /**