ClearChat Home v1.2.3 - Restore Updater + Version Fix

This patch is built from the user's current working ClearChat folder uploaded on 5/11/26.

Fixes:
- Restores admin/update.php upload page.
- Bumps displayed version to 1.2.3-home.
- Keeps config/install/database files protected during future ZIP updates.
- Refreshes operator notification localStorage key for cleaner testing.

Manual install if your Update page is missing:
- Extract this patch ZIP directly into your ClearChat root folder.
- Do not delete includes/config.php.
- Then open admin/update.php and use ZIP patches normally again.
