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/SPEC.md

@@ -1,15 +0,0 @@
-# Spec: fix-vram-model-prefix-match
-
-## Problem
-`scripts/vram_detect.py:396` uses `model_name.lower().startswith(key.lower())` to match model names. This prefix matching causes false matches: `phi-4-mini` matches `phi-4` (16000), and unknown models starting with known prefixes get incorrect context windows instead of the fallback.
-
-## Fix
-Try exact match first, then longest-prefix match (sort keys by length descending). Only match if the model name equals the key or starts with `key + "-"` (to avoid `phi-4` matching `phi-40`).
-
-## Acceptance Criteria
-- `phi-4-mini-instruct` does NOT match `phi-4` — returns fallback (128000)
-- `gpt-4o` still matches `gpt-4o` (exact) — returns 128000
-- `gpt-4o-mini` matches `gpt-4o-mini` (exact) — returns 128000
-- `claude-3-5-sonnet-20241022` matches exact entry — returns 200000
-- Existing tests in `test_vram_detect.py` still pass
-- Add test for the prefix edge case