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/actionable-phase-guidance/BUG_REPORT.md

@@ -0,0 +1,16 @@
+# Bug Report — actionable-phase-guidance
+
+## Review Scope
+Phase guidance feature across task.py, app.py, dashboard.js, styles.css.
+
+## Findings
+
+### No Critical Bugs Found
+The implementation is clean and well-structured. The phase guidance property covers all 12 states with actionable text. The frontend renders guidance conditionally. All three layers (model, API, UI) are properly wired.
+
+### Minor Observations
+- Some guidance messages reference `{self.name}` without `--project` flag, which may misbehave when run outside the framework project
+- Guidance for BLOCKED state delegates to `unblock_instructions` which is populated only for specific block conditions
+
+## Verdict
+No blocking bugs. Ready for adversarial review.