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/upgrade-pre-commit-autopilot-check/IMPLEMENTATION.md

@@ -1,11 +0,0 @@
-# Implementation: Upgrade Pre-Commit Hook
-
-## Changes
-- Modified `scripts/git-hooks/pre-commit`
-- Added autopilot detection: reads `.agent.md` for `Autopilot: Enabled`
-- Added non-terminal task scanner: runs `status.py --list` and checks for non-complete tasks
-- Added hollow task warning: if autopilot is on and non-terminal tasks exist, prints warning
-- Does NOT block commit — only warns
-
-## Files Changed
-- `scripts/git-hooks/pre-commit`: ~25 lines added after the existing edit-phase check