ClearChat Home v1.6.1 — Backup Restore Polish

Changes:
- Database backup filenames now include the ClearChat version.
- Backup SQL files now include version/type metadata comments.
- Reliability backup list now shows version, type, file size, and actions.
- Added delete action for old database backups.
- Restore now attempts to create a safety backup before overwriting tables.
- Fixed protected database backup directory handling.
- Cleaned packaged update/backup temp folders so fresh installs are lighter.

Recommended update method:
- Manual update remains safest while the ZIP updater continues to be tested.
