feat: integrate login/registration into PurchaseWizard

routes/web.php

@@ -31,9 +31,14 @@ Route::prefix('{locale?}')->where(['locale' => 'de|en'])->middleware('locale')->
 });
 
  // Fallback for /login (redirect to default locale)
- Route::get('/login', function () {
-     return redirect('/de/login');
- })->name('login.fallback');
+Route::get('/login', function () {
+    return redirect('/de/login');
+})->name('login.fallback');
+
+// Fallback for POST /login (redirect to default locale, preserve method)
+Route::post('/login', function (Request $request) {
+    return redirect('/de/login', 307)->withInput();
+})->name('login.fallback.post');
 
  // Fallback for /register (redirect to default locale)
  Route::get('/register', function (Request $request) {