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/readme-upgrade-docs/DOC_REVIEW.md

@@ -1,16 +0,0 @@
-# Doc Review: README and Upgrade Docs
-
-## Review Summary
-
-All documentation changes are accurate and consistent with the v2.0 enforcement implementation.
-
-## Checklist
-- [x] `--project` flag present on all status.py command examples
-- [x] `--can-edit` 4 modes documented with examples
-- [x] `--upgrade` documented for untracked tasks
-- [x] Three enforcement layers documented
-- [x] Upgrade process is step-by-step with commands
-- [x] Pre-commit hook installation in both Project Setup and Upgrading sections
-- [x] Key Components updated with all new files
-- [x] Untracked tasks section explains the refusal behavior
-- [x] No broken markdown or formatting issues