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/implement-autopilot-runtime/IMPLEMENTATION.md

@@ -1,19 +0,0 @@
-# IMPLEMENTATION.md — Autopilot Runtime
-
-## Changes Made
-- Created `scripts/autopilot.py` — a real Python implementation replacing the pseudocode `drive_all()` loop
-- Added stuck-task detection to `status.py --audit` as Category 5
-
-## autopilot.py Commands
-- `--summary`: Shows project task overview (total, terminal, blocked, unblocked, stuck)
-- `--drive`: Drives one step — finds the most advanced unblocked task and outputs next instructions
-- `--loop`: Runs continuous drive loop with configurable iterations and delay
-- `--stuck`: Detects tasks stuck in non-terminal phases >N minutes (default: 60)
-
-## How It Works
-- `scan_all_tasks()` reads .state files from all task directories
-- `is_terminal()` checks for complete/human_intervention phases
-- `needs_user_input()` detects approval gates and VERDICT.md with FAIL/NEEDS_REVIEW
-- `sort_by_advancement()` prioritizes tasks closest to completion
-- `detect_stuck_tasks()` finds tasks unchanged >60 minutes in non-terminal phases
-- Empty queue outputs actionable instructions to create new tasks