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/implement-task/VERDICT.md

@@ -1,37 +0,0 @@
-# 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.