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/ADVERSARIAL_BUG_REPORT.md

@@ -0,0 +1,13 @@
+# Adversarial Bug Report: Dashboard Implementation
+
+## Findings
+
+### Finding 1: Critical
+- **Issue**: File system watcher doesn't handle inotify permission errors on some systems
+- **Impact**: High - dashboard may crash when starting on systems without inotify
+- **Fix**: Add try/except around inotify initialization, fall back to polling
+
+### Finding 2: Medium
+- **Issue**: Dashboard doesn't handle tasks with spaces in folder names
+- **Impact**: Medium - task names may display incorrectly
+- **Fix**: Escape special characters in task names