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)

semif_agent/skill.py

@@ -52,7 +52,16 @@ class SkillRunner:
         run_ok = assessment.success
         decisions = getattr(prediction, "decisions", [])
         for decision, result in decisions:
-            self.log.append(decision, result, extra={"skill": skill.name, "run_ok": run_ok})
+            self.log.append(
+                decision,
+                result,
+                extra={
+                    "phase": "predict",
+                    "skill": skill.name,
+                    "run_ok": run_ok,
+                    "run_id": request.id,
+                },
+            )
 
         return RunResult(
             skill=skill.name,