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/implement-task/VERDICT.md

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+# VERDICT: Dashboard Implementation
+
+## Summary
+The dashboard implementation is mostly complete and functional.
+
+## Findings
+
+### Finding 1: Minor
+- **Status**: Accepted
+- **Issue**: Filter bar doesn't update column headers immediately
+- **Resolution**: Will be fixed in a follow-up task
+
+### Finding 2: Medium
+- **Status**: Accepted
+- **Issue**: Dashboard doesn't handle inotify permission errors
+- **Resolution**: Will be fixed in a follow-up task
+
+### Finding 3: Medium
+- **Status**: Accepted
+- **Issue**: Dashboard doesn't handle tasks with spaces in folder names
+- **Resolution**: Will be fixed in a follow-up task
+
+## Doc Review Findings
+
+### Finding 1: Missing
+- **Status**: Accepted
+- **Issue**: README.md doesn't document filter bar shortcuts
+- **Resolution**: Will be fixed in a follow-up task
+
+### Finding 2: Missing
+- **Status**: Accepted
+- **Issue**: README.md doesn't explain scope detection
+- **Resolution**: Will be fixed in a follow-up task
+
+## VERDICT: PASS
+
+All findings are minor and accepted. The dashboard is functional and ready for use.