Add browser dashboard, run tracing, and logged navigation decisions

- dashboard.py: stdlib http.server + JSON API (tree/trace/dream/status,
  POST submit/relabel); static/ single-page Redux-DevTools-style inspector
- trace.py: runs.jsonl lifecycle events keyed by run_id
- scheduler/skills/skill: every decision carries run_id; navigation choices
  now logged (navigate:category/leaf); requeues stamp meta.parent_run
- cli: 'dashboard' subcommand; config.json untracked per-machine (see
  config.example.json)

.gitignore

@@ -2,4 +2,8 @@ __pycache__/
 *.pyc
 .venv/
 data/decisions.jsonl
-data/drafts/
+data/runs.jsonl
+data/drafts/
+.pytest_cache/
+config.json
+*.log