MultiView CCTV - Site + DVR/NVR + Camera Management v1

INSTALL:
1) WinSCP se /var/www/html/multiview-cctv/ ka backup lein.
2) ZIP extract karein.
3) Is ZIP ka site_management folder upload karein:
   /var/www/html/multiview-cctv/site_management/
4) URL kholein:
   http://YOUR_SERVER/multiview-cctv/site_management/index.php

Existing config.php aur login.php ko replace nahi karna. Module existing config.php ke
$pdo, e(), csrf_token(), verify_csrf(), require_master_admin() functions use karta hai.
Separate auth.php ki zarurat nahi.

Storage permission (Ubuntu root SSH):
chown -R www-data:www-data /var/www/html/multiview-cctv/site_management/storage
chmod 750 /var/www/html/multiview-cctv/site_management/storage

Encryption key pehli baar automatically generate hogi. Backup me storage/device.key
ko zaroor safe rakhein; key kho gayi to saved DVR credentials decrypt nahi honge.
Public deployment se pehle HTTPS enable karein.

Features: Customer-wise Site CRUD, DVR/NVR CRUD, AES-256-GCM encrypted host/user/password,
camera channel CRUD, TCP reachability test. No SQL changes are required.

Limitations: TCP test RTSP video, playback, P2P, VPN ya remote Internet connectivity
confirm nahi karta. RTSP/P2P vendor SDK integration next development phase hai.
DVR ports public internet par expose na karein.