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/complete/remove-file-system-watcher/VERDICT.md

@@ -0,0 +1,18 @@
+# Verdict: Remove File System Watcher
+
+## Status: PASS
+**Completion Date**: 2026-06-14
+
+## Summary
+The unused file system watcher module has been removed and documentation now accurately describes the polling-based refresh behavior.
+
+## Findings
+- `refresh.py` deleted.
+- README architecture diagram cleaned up.
+- Tests still pass.
+
+## Remaining Issues
+None.
+
+## Score
++10 PASS