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/review-textarea/IMPLEMENTATION.md

@@ -0,0 +1,23 @@
+# Implementation: Inline Comment Textarea for Review
+
+## Summary
+
+Replaced the `prompt()` dialog with an inline textarea in the detail modal for review comments. Modal closes on successful submission.
+
+## Changes Made
+
+### `dashboard.js`
+- Added `<textarea class="review-textarea">` in the detail panel review section
+- `submitReview()` reads from textarea instead of `prompt()`
+- On success, calls `closeDetail()` instead of re-rendering the detail panel
+
+### `styles.css`
+- `.review-textarea` — textarea styling with theme-aware colors
+- `.review-textarea:focus` — focus state with accent border
+
+### `index.html`
+- No structural changes needed (textarea rendered by JS)
+
+## Files Modified
+- `automaton/dashboard/html/dashboard.js` — textarea rendering and submission
+- `automaton/dashboard/html/styles.css` — textarea styles