Fix OTP verification success response payload and restore deterministic encryptData

backend/auth/otp/providers.php

@@ -131,15 +131,15 @@ function sendNabehOtp(string $receiver, string $otp, string $method = '', string
     // Strip symbols for Nabeh endpoint
     $phoneRaw = preg_replace('/\D+/', '', $receiver);
 
-    // Map method/type (Image OTP is the default and only media method allowed)
-    $type = 'image';
-    if ($method === 'text') {
+    // Map method/type (Text OTP is the default now)
+    $type = 'text';
+    if ($method === 'image') {
+        $type = 'image';
+    } elseif ($method === 'text') {
         $type = 'text';
-    } elseif ($method === 'image') {
-        $type = 'image';
     } else {
-        // If no method specified or if 'voice' was requested, force default to 'image'
-        $type = 'image';
+        // If no method specified or if 'voice' was requested, force default to 'text'
+        $type = 'text';
     }
 
     $appName = 'سيرو رايدر';