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/BUG_REPORT.md

@@ -1,13 +0,0 @@
-# Bug Report: fix-vram-model-prefix-match
-
-## Scope
-Reviewed `scripts/vram_detect.py` `_lookup_model_context()` and `_KNOWN_MODEL_SUFFIXES` for bugs.
-
-## Findings
-No bugs found. The three-tier matching correctly handles:
-- Exact matches
-- Ollama `:` parameter tags
-- Known instruction-tuning suffixes via `-` separator
-- Rejects unknown suffixes (prevents false matches)
-
-## Verdict: PASS