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/fix-cat3-audit-paths/DOC_REVIEW.md

@@ -1,11 +0,0 @@
-# Doc Review: fix-cat3-audit-paths
-
-## Summary
-No documentation updates needed. The Category 3 audit is an internal enforcement mechanism not documented in user-facing docs.
-
-## Findings
-- No references to the Cat 3 audit path logic exist in README.md, AGENTS.md, or other docs.
-- The fix is internal to `status.py` and does not change any user-facing API.
-
-## Verdict
-No doc changes required.