- SessionPool: LRU cache for SSH/SFTP sessions across server switches
- Sidebar: green dot indicators for servers with active sessions
- Sidebar: active sessions count label
- Terminal: buffer preservation on server switch via get_current_buffer()
- FilesTab/TerminalTab: pool integration for session reuse
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>