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/framework-self-enforcement/IMPLEMENTATION.md

@@ -1,23 +0,0 @@
-# Implementation: Framework Self-Enforcement
-
-## Summary
-
-Added rules and instructions so the framework applies its own task-driven development principles to itself.
-
-## Changes Made
-
-### `.rules.md`
-Replaced the template placeholder with concrete, enforceable rules:
-
-- **Task-Driven Development**: All changes must go through tasks (SPEC → phases → VERDICT), no direct file edits, no manual `mkdir tasks/`
-- **VRAM-Aware Task Sizing**: Check `config.md` VRAM limits before scoping tasks, verify fit within max peak context
-- **Changelog**: Append entry to CHANGELOG.md when a task reaches Resolution
-- **Self-Improvement**: One rule per observed failure mode with concrete example, consolidate monthly
-- **Session Discipline**: After writing SPEC.md, stop and wait for user approval before implementing
-
-### `system-prompt.md`
-Added step 4: "Read ~/.automaton/.rules.md (global framework rules)" to the startup sequence.
-
-## Files Modified
-- `.rules.md` — converted from template to concrete rules (25 lines)
-- `system-prompt.md` — added global rules reading instruction