AscendTrade notification bell patch

Upload/replace these three PHP files in your public_html/admin/ folder:
- index.php
- deposits.php
- withdrawals.php

Upload admin-notifications.css into public_html/assets/ (create the folder/file if needed).
The bell displays the combined pending deposit + withdrawal count. Open the bell to see separate counts and links. Counts are queried from deposits.status=pending and withdrawals.status=pending, so they update after a page refresh following approve/reject.

This patch does not change approval/rejection logic or database schema. Member bell remains in partials/header.php and uses member_notifications.read_at.
