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/cleanup-cruft/VERDICT.md

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+# Verdict: cleanup-cruft
+
+## Status: PASS
+**Completion Date**: 2026-06-14
+
+## Summary
+Removed 7 pieces of framework cruft: stray debug_root.py, stale inotify dependency, empty widgets directory, incorrect RAM detection docs, undocumented dashboard.sh wrapper, tautological _find_tasks_dir logic, and unnecessary sys.path hack.
+
+## Findings
+- All 134 tests pass
+- debug_root.py removed (functionality covered by tests and dashboard scope endpoint)
+- inotify dependency removed (filesystem watcher was already deleted in earlier task)
+- _find_tasks_dir now returns Path instead of Path | None, callers updated
+- __main__.py works correctly without sys.path hack when run via python -m
+- config.md now accurately describes RAM detection methods
+
+## Tasks for Review / Tie-Breaks
+- None
+
+## Score
++10