Archive completed tasks, add cleanup commands, self-documenting dashboard UI

- Archive 79 completed framework-dev tasks from tasks/ -> tasks/complete/
- status.py: add --cleanup-done and --install-cleanup-schedule commands
- Add scripts/automaton-cleanup.sh for periodic task archiving
- Dashboard: rename 'Background' tab -> 'Agent', 'Cleanup' agent -> 'Completed Task Archiver', remove redundant group headers and pill badges, dim inactive agent placeholders
- .rules.md: add Self-Documenting UI Names rule
- New tests: test_cleanup_done.py, expanded test_app.py and test_task.py

tasks/dashboard-task-review/BUG_REPORT.md

@@ -1,20 +0,0 @@
-# Bug Report: Dashboard Task Review and Approval
-
-## Methodology
-Reviewed app.py (review API), dashboard.js (review UI), styles.css, index.html.
-
-## Acceptance Criteria
-| # | Criterion | Result |
-|---|-----------|--------|
-| 1 | Review state in REVIEW.md | ✅ |
-| 2 | Review status badge on cards | ✅ |
-| 3 | Approve/Request Changes buttons | ✅ |
-| 4 | Filter for pending reviews | ✅ |
-| 5 | Stats shows pending count | ✅ |
-| 6 | API serves/submits review data | ✅ |
-
-## Findings
-1. **Minor**: `_serve_review_summary()` endpoint exists but is unused by frontend.
-2. **Minor**: Review status affects display only; actual state transitions rely on Orchestrator.
-
-## Verdict: PASS