WebDAV server now serves the Backend root directory. Receiver pulls
backups/, chat-history/, and uploads/ individually so all data is
synced between PCs.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Source PC serves backups/ folder via rclone WebDAV server (auto-starts with app).
Receiver PC pulls backups on schedule using rclone sync.
Network Backup UI now has two tabs: Rclone and API Key.
Rclone installed automatically via postinstall script.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>