merge accounting app and solve conflict

app/login/api/engine/register.php

@@ -60,7 +60,8 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     $csrf = $_SERVER['HTTP_X_CSRF_TOKEN'] ?? '';
     if (empty($csrf) || $csrf !== ($_SESSION['csrf_token'] ?? '')) {
         http_response_code(403);
-        exit(json_encode(['message' => 'Invalid request.']));
+        $answer['message'] = 'Invalid request.';
+        exit(json_encode($answer));
     }
 }
 
@@ -176,7 +177,7 @@ try {
     // ── Step 14: Send verification email (non-fatal) ─────────────────────────
     // silent=true means the mailer returns false on failure instead of calling
     // exit() — so the account is always created even if SMTP is unavailable.
-    require_once $include_url . 'assets/utils/module/mailer.php';
+    require_once '../../../assets/utils/module/mailer.php';
 
     $mailer   = new mailer(['pdo1' => $pdo1]);
     $mail_sent = $mailer->send_email([