spawnRun adopted any existing `ccam-lane-<id>` tmux session without looking
at it, so a Resume issued while the session sat at a bare shell prompt (left
by `ccam lanes shell`, or by a `claude` that had already exited) dropped the
whole argv: no `--resume` ran, no initial prompt was typed, and the API still
answered 200. The lane's DB `run_id` is not set in that case, so the ERUNLIVE
guard in the start route never saw it either.
Reuse the pane instead of erroring: when the session exists and
`#{pane_current_command}` is a shell, type the argv into that pane and record
the run. A pane running a program (a live `claude`, an editor, a build) is
still adopted untouched, so attaching shows what is running rather than typing
over it. `sendCommand` POSIX single-quotes every argument and uses
`send-keys -l`, the only place in tmux.js that composes a command line.
- pty-run.js's publicRun() now reads promptPreview back from the
dashboard_runs row it already wrote at spawn time (was persisted,
never read back) — RunHandle carries it through to the client.
- Workspace.tsx's onStartFromSetup no longer trusts RunSetup's
always-populated laneId prop to decide whether a new lane needs
ensuring — it re-resolves the target lane from the cwd the user
actually typed, so starting a run with a different cwd than the
currently-selected lane correctly ensures/creates the right lane
instead of silently starting in the wrong one.
Fixes findings from the Task 8+9+10 review that a prior fix attempt
left unresolved (2f39f4e's --no-verify commit, and an incomplete
diagnosis of the lane-routing bug as a test-harness artifact).
nntrivi2001