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/fix-can-edit-path-prefix/VERDICT.md

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+# Verdict: fix-can-edit-path-prefix
+
+## Status: PASS
+**Completion Date**: 2026-06-22
+
+## Summary
+The fix correctly prevents sibling-directory bypass at all 5 locations in status.py. All tests pass.
+
+## Findings
+- `str(file_path).startswith(proj_str + os.sep) or str(file_path) == proj_str` correctly handles path boundaries.
+- All 5 affected locations use the same consistent pattern.
+- Bug Finder found no bugs. Adversarial Bug Finder confirmed no issues with symlinks, trailing slashes, or case sensitivity.
+- No contradictions between the two reports.
+- Test coverage added: `TestCanEditPathPrefix` (3 tests covering sibling rejection, subdirectory acceptance, and can-edit-task).
+- All 242 tests pass.
+
+## Tasks for Review / Tie-Breaks
+None.
+
+## Remaining Issues
+None.
+
+## Score
++10 (PASS)
+
+## Reviewer Comments
+