ccs bar always forced the dashboard onto port 3000 (first free of a
hardcoded candidate list), which collides with other local dev servers, and
bar.json was rewritten to 3000 on every launch.
- `ccs bar [launch] --port N` runs the server on exactly N: reuses a live
server already on N, moves a running server from another port (SIGTERM via
server.pid, wait for exit), errors clearly when N is busy or the value is
invalid.
- The chosen port is persisted into launch.json args, so the Swift app
self-starts the server on the same port.
- Without --port, launch and serve now try the port recorded in bar.json
first (sticky), so the server keeps coming back on the port the user last
chose instead of reverting to 3000.
- Bare flags (`ccs bar --port N`) route to the launch subcommand; --port is
documented in `ccs bar --help`.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
