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/state-file-enforcement/DOC_REVIEW.md

@@ -1,15 +0,0 @@
-# Doc Review: State File Enforcement
-
-## Documents Checked
-| Doc | Status |
-|-----|--------|
-| SPEC.md | ✅ Complete — all acceptance criteria defined |
-| IMPLEMENTATION.md | ✅ Implementation documented |
-| prompts/orchestrate.md | ✅ Updated to read/write .state |
-| prompts/workflow.md | ✅ References .state as canonical |
-| scripts/status.py | ✅ All .state commands implemented |
-
-## Findings
-None — .state enforcement is consistently documented across spec, implementation, and prompts.
-
-## Verdict: PASS