The terminal tab was unusable on Windows: creack/pty has no native
Windows ConPTY support, so pty.Start() returned "operating system not
supported" and the WebSocket closed immediately on any tab click —
even though the menu detection (wsl --list --quiet, pwsh, cmd) worked.
Introduce a termSession interface with two implementations selected at
runtime:
- ptySession (unix): unchanged behaviour, real PTY via creack/pty,
resize works, vim/top behave normally.
- pipeSession (windows): plain stdin + merged stdout/stderr pipes,
forwarded to the WebSocket. Resize is a no-op (no SIGWINCH without a
TTY), so full-screen TUIs misbehave in this mode — but launching
wsl.exe, pwsh, or cmd works for line-based interaction, which is
what the menu shortcuts target.
handleTerminalWS now goes through startTermSession(cmd); the unix path
is unchanged, the windows fallback kicks in only when pty.Start would
have failed.
Bump v0.7.0 → v0.7.1; CHANGELOG entry added.
