tui: add --resume <session_id> and print resume hint on TUI close ...

Closing Navi Code now tells the user the session id and the exact command to
continue it, so a session is one re-run away instead of lost to state lookup.

- cli.py: add --resume <session_id> (mutex with --new-session). Raw and TUI
  paths resolve the given id via api.get_session; a bad id is a hard error,
  not a silent new session. After app.run() returns and the terminal is
  restored, print "Session <id>" / "Resume with: navi-code --resume <id>"
  when a session is attached.
- tui_app._resolve_session: make the explicit-id branch strict — a failed
  get_session surfaces an error event and returns None instead of falling
  through to creating a new session (a --resume typo used to silently start
  a fresh session). Saved-state resume stays lenient.
- tests: resume-flag resolve/bad-id/mutex + hint format; tui strict-on-bad
  explicit id and explicit-id resume.

Co-Authored-By: Claude <noreply@anthropic.com>

navi-code CLI: make -h show help instead of sending it to the model ...

The CLI uses ignore_unknown_options=True so a prompt can contain flag-like
text, but that also meant the short -h flag was not recognized as the help
flag — it fell through to the PROMPT argument and was sent to Navi as a
message ("you've asked for help again..."). --help already worked because
Click auto-generates the long form.

Add help_option_names=["-h", "--help"] to context_settings so -h is a known
help option, parsed before the ignore-unknown fallback.

Test: -h via CliRunner exits 0 and shows usage. 577 passed, 1 skipped.

Co-Authored-By: Claude <noreply@anthropic.com>

Navi Code: stop via Esc + project cwd propagation ...

- TUI: Esc stops active stream cooperatively via POST /sessions/{id}/stop
- TUI: render stream_stopped as status message
- CLI/WebSocket: send shell cwd in client->server message field
- Orchestrator stores cwd in session.session_metadata
- ContextBuilder injects [Working directory] into LLM context
- Agent sets current_working_directory ContextVar per turn
- tools/base: ToolContext gains cwd field
- filesystem/terminal/code_exec resolve relative paths against session cwd
- Add bin/navi-code wrapper for PATH symlink; document in README.md
- Update docs/websocket.md and tests

Full pytest: 544 passed, 1 skipped.

Co-Authored-By: Claude <noreply@anthropic.com>

Navi Code TUI: review fixes for Phase 5 ...

- Fix raw CLI session API fields (session_id/name/preview)

- Add --mouse/--no-mouse flags and persistent TUI settings coercion

- Make attach_session/apply_theme public, add ChatPanel.clear()

- Deduplicate session selection handlers and editor error handling

- Update docs and tests

Navi Code: Phase 2 — CLI terminal client, tests, docs ...

- Add clients/terminal package: config, state, REST API wrappers, WebSocket
  client, renderer, and click-based interactive CLI.
- Wire navi-code console script via pyproject.toml.
- Add unit and WebSocket integration tests for the terminal client.
- Update docs/profiles.md, docs/config.md, README.md with navi_code profile
  and default-profile instructions.
- Add docs/navi_code.md setup guide and docs/navi_code_cli.md usage reference.
- Fix lint in new test files and test_auth_disabled.py.

Tested: 459 passed, 1 skipped (excluded unrelated websocket test).

Co-Authored-By: Claude <noreply@anthropic.com>