feat: domain-based theme-detection

src/Service/BookingService.php

@@ -22,8 +22,6 @@ class BookingService
     public const BOOKING_EDIT_KEY = 'booking_edit';
     public const RETURN_URL_KEY = 'booking_return_url';
     public const DEFAULT_RETURN_URL = 'https://www.ep-reisen.de';
-    public const THEME_KEY = 'booking_theme';
-    public const DEFAULT_THEME = 'base';
 
     public function __construct(
         private readonly TravelDataService $travelDataService,
@@ -195,33 +193,6 @@ class BookingService
         return $request->getSession()->get(self::RETURN_URL_KEY, self::DEFAULT_RETURN_URL);
     }
 
-    /**
-     * Stores the theme identifier in the session.
-     *
-     * Sanitizes the theme value to allow only alphanumeric characters and hyphens.
-     * Falls back to the default theme if empty or invalid.
-     */
-    public function storeTheme(Request $request, string $theme): void
-    {
-        $sanitized = preg_replace('/[^a-zA-Z0-9-]/', '', $theme);
-
-        if ('' === $sanitized) {
-            $sanitized = self::DEFAULT_THEME;
-        }
-
-        $request->getSession()->set(self::THEME_KEY, $sanitized);
-    }
-
-    /**
-     * Retrieves the theme identifier from the session.
-     *
-     * Returns the default theme if not set in session.
-     */
-    public function getTheme(Request $request): string
-    {
-        return $request->getSession()->get(self::THEME_KEY, self::DEFAULT_THEME);
-    }
-
     /**
      * Creates a fresh booking session with the provided travel parameters.
      *