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/readme-upgrade-docs/SPEC.md

@@ -1,23 +0,0 @@
-# README and Upgrade Documentation Update
-
-## Goal
-Update README.md with complete, clear documentation for v2.0 features: `--project` flag, `--upgrade`, `--can-edit` project-level mode, pre-commit hook installation, and the full upgrade process for existing projects.
-
-## Requirements
-- Quick Reference includes `--project` on every command
-- `--can-edit` project-level modes documented with examples
-- `--upgrade` documented for untracked tasks
-- Enforcement layers section (pre-edit hook, pre-commit hook, prompt rules)
-- Upgrade process for existing projects (step-by-step for newcomers)
-- Pre-commit hook installation instructions in Project Setup and Upgrading sections
-- Key Components updated with new files
-
-## Acceptance Criteria
-- [x] All `status.py` examples include `--project`
-- [x] `--can-edit` modes documented
-- [x] `--upgrade` for untracked tasks documented
-- [x] Three enforcement layers documented
-- [x] Upgrade process for existing projects is step-by-step
-- [x] Pre-commit hook installation in both Project Setup and Upgrading
-- [x] Key Components updated
-- [x] 200 tests pass