ClearChat Home v1.2.2 - Operator Notification Clean Fix

Patch-only update. Safe for the built-in ClearChat updater.

Changes:
- Regenerates the operator/admin notification script cleanly.
- Adds an inline Test Sound button to Settings.
- Keeps a floating Test Sound helper visible on admin pages.
- Uses a new localStorage key so old notification state does not block alerts.
- Forces notify.php polling every 5 seconds from admin pages.
- Keeps browser notifications working when permission is granted.
- Bumps displayed version to 1.2.2-home.

After applying:
1. Hard-refresh admin with Ctrl+Shift+R.
2. Go to Settings.
3. Click Test Sound once.
4. Click Enable Browser Notifications if desired.
5. Keep the admin panel open while testing from the public widget.
