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/complete/fix-context-sizing/IMPLEMENTATION.md

@@ -0,0 +1,14 @@
+# Implementation: fix-context-sizing
+
+Implements SPEC.md R1–R6. Files touched:
+
+- `scripts/vram_detect.py` — R1 (double headroom), R2 (fake clamps), R3 (--loop-mode refuse), R4 (JSON fields)
+- `config.md` — R5 (`## Loop Role Models` section)
+- `prompts/decompose.md` — R6 (4k tier + 16k floor)
+- `tests/test_context_sizing.py` — new tests
+
+## Approach
+
+`recommend_context` rewritten so headroom is applied exactly once. `main()` reports honest numbers (no `else 8`/`else 6` fallbacks). New `--loop-mode` CLI flag refuses zero-context-unknown and sub-16k available budget; non-loop callers keep prior behavior. JSON output exposes `available_context_kb` and `loop_mode_eligible`.
+
+`config.md` gets a `## Loop Role Models` section. `decompose.md`'s context-budget table grows a 4k row and an explicit `≤ 16k: refuse` floor statement.