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/hook-install-process/ADVERSARIAL_BUG_REPORT.md

@@ -0,0 +1,21 @@
+# Adversarial Bug Report: hook-install-process
+
+## Summary
+No critical issues. Two minor observations.
+
+## Bugs Found
+
+### Bug 1: upgrade.sh doesn't verify python3 is available (Low)
+- **Severity**: Low
+- **Location**: scripts/upgrade.sh line 26
+- **Description**: The script runs `python3 "$STATUS_SCRIPT" --upgrade` without checking if python3 exists. If python3 is not on PATH, the upgrade silently fails (due to `|| true`).
+- **Suggested Fix**: Add a python3 availability check at the start.
+
+### Bug 2: Pre-commit hook doesn't handle bare repos (Low)
+- **Severity**: Low
+- **Location**: scripts/git-hooks/pre-commit
+- **Description**: If the project uses a bare repo or worktrees, `.git/hooks/` may not exist at the expected path.
+- **Suggested Fix**: Use `git rev-parse --git-dir` instead of assuming `.git/hooks/`.
+
+## Score
++5