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/harden-enforcement-layers/BUG_REPORT.md

@@ -0,0 +1,16 @@
+# Bug Report — harden-enforcement-layers
+
+## Review Scope
+Pre-push hook, install-hooks.sh, register-guards.sh, prompt modifications, contract updates, install/update/upgrade scripts, system-prompt.md.
+
+## Findings
+
+### No Critical Bugs Found
+All scripts are syntactically correct (bash). The pre-push hook correctly calls `status.py --can-edit` with `--json` flag and blocks non-zero exit codes. The install-hooks.sh properly handles missing source files. The register-guards.sh correctly detects opencode config and pi binary.
+
+### Minor Observations
+- `register-guards.sh` line 30 uses Python inline with `$OPENCODE_CONFIG` directly inside a Python string — this could break if the path contains special characters
+- `update.sh` hooks installation only runs if `git rev-parse` succeeds but doesn't check if the hook already exists (it checks `[ ! -f "$HOOK_DST" ]` which is safe)
+
+## Verdict
+No blocking bugs. Ready for adversarial review.