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-context-sizing/DOC_REVIEW.md

@@ -1,27 +0,0 @@
-# Doc Review: fix-context-sizing
-
-## Status: PASS
-
-## Docs Updated
-1. `config.md` — added `## Loop Role Models` section between System Requirements and Framework Version.
-2. `prompts/decompose.md` — added `**4k VRAM**` row in peak-context Guideline and `(4k VRAM)` rows in Sub-Task Size Targets; added `≤ 16k VRAM: REFUSE` line as a non-negotiable floor.
-3. `tasks/fix-context-sizing/SPEC.md` SPEC.md, IMPLEMENTATION.md — present in task folder.
-4. `tests/test_context_sizing.py` — 15 new test cases.
-
-## Documentation Gaps Closed
-- Loop role contract now exists in user-facing `config.md` (was previously implicit / absent).
-- `decompose.md`'s context budget guidance now exposes the 4k tier and refuses ≤16k budgets explicitly, so users decomposing tasks for small models can plan correctly.
-- `--loop-mode` CLI flag is documented in script's `--help` output.
-- JSON output schema now carries `available_context_kb` and `loop_mode_eligible` which downstream consumers (loop runner) can rely on.
-
-## Gaps Remaining (out of scope — deferred to Tier 2 per D17)
-- `README.md` does not yet document `--loop-mode` in the human-facing CLI section (Tier 2 task).
-- Dashboard does not surface `loop_mode_eligible` (v1.1 panel).
-- `prompts/decompose.md` line 135 still says "If model detection fails, use 128k tokens as default" — the auto-detection flow's fallback.  This is the user-facing decompose prompt's narrative; changing it would alter how decomposition agents behave in the research phase. Left intact; loop runner uses `--loop-mode` instead which *refuses* on this condition.
-
-## Cross-References
-- DESIGN.md not produced — task went directly research → implement per locked plan (Tier 1 fixes don't warrant a separate design phase).
-- This DOC_REVIEW covers the doc-side of the task; referee step is final.
-
-## Verdict
-Documentation is consistent with SPEC. No blocking gaps.