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/hook-install-process/SPEC.md

@@ -1,16 +0,0 @@
-# Hook Installation in Onboarding and Upgrade
-
-## Goal
-Add pre-commit hook installation to both the new-project onboarding process and the existing-project upgrade process, so enforcement is set up automatically.
-
-## Requirements
-- Onboarding prompt includes a step to install the git pre-commit hook
-- upgrade.sh installs the hook during upgrade (with symlink detection)
-- install.sh mentions hook installation in post-install next steps
-
-## Acceptance Criteria
-- [x] prompts/onboarding.md includes Step 2c for hook installation
-- [x] scripts/upgrade.sh installs hook and detects existing hooks
-- [x] scripts/install.sh mentions hook installation
-- [x] Shell scripts pass syntax check
-- [x] All 200 tests pass