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/fix-vram-model-prefix-match/DOC_REVIEW.md

@@ -1,12 +0,0 @@
-# Doc Review: fix-vram-model-prefix-match
-
-## Documentation Impact
-No documentation changes needed. The fix is internal to `_lookup_model_context()` with no change to user-facing CLI output or behavior.
-
-## Checklist
-- [x] No new commands or flags introduced
-- [x] AGENTS.md unchanged — no references to model matching internals
-- [x] VRAM_CONFIG.md format unchanged
-- [x] CHANGELOG.md will be updated for the release
-
-## Verdict: PASS