guest booking self-management feature + layout fixes

- add manage_token column to bookings (DB migration done)
- generate unique token per booking, include manage link in confirmation emails (no/en/hu)
- new routes: manage-booking, manage-booking-process, manage-booking-cancel
- new views: manage-booking.php, manage-booking-cancelled.php
- 24h cutoff enforcement for cancel/modify; emails sent to guest + studio CC
- fix manage-booking step 3 float layout (overflow:auto BFC clearfix)
- fix booking page time slot overflow: bookingResultsWrapper 378px -> 360px

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

application/models/Service_model.php

@@ -531,15 +531,16 @@ class Service_model extends CI_Model {
         $this->load->database();
         $query = $this->db->query("INSERT INTO bookings (
             guest_name,
-            guest_email, 
-            guest_phone, 
+            guest_email,
+            guest_phone,
             worker_id,
             booking_date,
             booking_start_time,
             booking_finish_time,
             service_ids,
             guest_confirmed,
-            guest_confirm_code
+            guest_confirm_code,
+            manage_token
             ) VALUES(
                 '".$bookingArray['guest_name']."',
                 '".$bookingArray['guest_email']."',
@@ -550,9 +551,16 @@ class Service_model extends CI_Model {
                 '".$bookingArray['booking_finish_time']."',
                 '".$bookingArray['service_ids']."',
                 '".$bookingArray['guest_confirmed']."',
-                '".$bookingArray['guest_confirm_code']."'
+                '".$bookingArray['guest_confirm_code']."',
+                '".$bookingArray['manage_token']."'
                 );");
     }
+
+    public function getBookingByToken($token){
+        $this->load->database();
+        $query = $this->db->query('SELECT * FROM bookings WHERE manage_token = "'.$this->db->escape_str($token).'" LIMIT 1;');
+        return $query->num_rows() > 0 ? $query->result()[0] : false;
+    }
     
     public function getWorkerSchedule($worker_id) {
         return $this->db