Address Ark0N's review on #506:
- The history pull's own `\x1bc` reset erased the "Pane B disconnected"
marker onclose wrote, painting a fresh, current-looking history while
onData kept silently dropping every keystroke on the dead socket — a
Codeman restart drops the socket while the tmux session (and so the HTTP
pull) survives, making this easy to hit. onclose now tracks the closure
via `_wsClosed` in addition to writing the marker (extracted into
`_writeDisconnectedMarker()`), and a replay re-stamps it in the pull's
`finally` block, after the live-frame flush, whichever order the close
and the pull land in.
- `_maybeLoadMoreHistory()` now stands aside for a detached session,
mirroring `_sendResize()`'s existing check and app.js's
`_maybeRefetchFullHistory()` — its own window already owns its PTY size
and scrollback.
- Wording: a non-shell CLI's history is out of scope for this pull, not
absent (codex and Claude's inline renderer do grow tmux history); the
alternate-screen skip only matters for a direct-PTY shell, since tmux
never surfaces the alt buffer to the browser xterm. CLAUDE.md points at
the invariants heading directly.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
