UNIPOS PRIVATE SHOP LOGIN PATCH

Upload login.php and .htaccess to the root /pos_reports/ directory.
Do NOT create physical folders for each shop.

Shop login: https://unicomlb.com/pos_reports/SHOP_ID/shop_login.php
Example: https://unicomlb.com/pos_reports/s16f57799298a/shop_login.php

The Shop ID is resolved server-side from the URL. The shop selector and Super Admin link are removed. Invalid/inactive shops receive HTTP 404. Passwords are still verified against accounts.json using password_verify().

Keep existing accounts.json, config.php, private/, and LIVE_POS.PRG unchanged.
Back up the original login.php and .htaccess first.

This patch assumes Apache .htaccess rewrite support (typical cPanel).
Super Admin remains /pos_reports/admin.php.
Shop Admin and dashboard pages remain /pos_reports/shop_admin.php and /pos_reports/index.php after login.
