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/SPEC.md

@@ -1,18 +0,0 @@
-# SPEC: Upgrade Pre-Commit Hook with Autopilot Awareness
-
-## Problem
-Agents create throwaway tasks (skip to implement, commit, abandon) to bypass the pre-commit hook.
-The hook checks for an edit-phase task but doesn't detect hollow/stale tasks or warn about
-hanging tasks when autopilot is enabled.
-
-## Requirements
-1. After a successful pre-commit check, read `.agent.md` to detect `Autopilot: Enabled`
-2. If autopilot is enabled, scan all tasks for non-terminal (stuck) tasks
-3. If hanging tasks exist, emit a clear warning in the hook output
-4. Do NOT block the commit — only warn. Blocking would prevent legitimate fixes.
-5. Detect hollow tasks: tasks in implement/doc_review phase with no IMPLEMENTATION.md artifact
-
-## Acceptance Criteria
-- Pre-commit hook warns when autopilot is on and non-terminal tasks exist
-- Pre-commit hook warns when the edit task is hollow (no real implementation)
-- Existing blocking behavior (no edit task = DENIED) is preserved unchanged