U-1: Replace ssh.InsecureIgnoreHostKey() with TOFU (Trust On First Use) host
key verification via HostKeyStore. New keys auto-store, matching keys accept
silently, CHANGED keys reject with MITM warning. Added DeleteHostKey() for
legitimate re-key scenarios.
U-2: Wire CWDTracker per SSH session. readLoop() now processes OSC 7 escape
sequences, strips them from terminal output, and emits ssh:cwd:{sessionID}
Wails events on directory changes. Shell integration commands (bash/zsh
PROMPT_COMMAND) injected after connection.
U-3: Session manager now tracks all SSH and RDP sessions via CreateWithID()
which accepts the service-level UUID instead of generating a new one.
ConnectSSH, ConnectSSHWithPassword, ConnectRDP register sessions;
DisconnectSession and RDPDisconnect remove them. ConnectedAt timestamp set.
U-4: WorkspaceService instantiated in New(), clean shutdown flag managed on
startup/exit, workspace state auto-saved on every session open/close.
Frontend-facing proxy methods exposed: SaveWorkspace, LoadWorkspace,
MarkCleanShutdown, WasCleanShutdown, GetSessionCWD.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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