feat(KB-048): add collapsible list sections to dashboard

- Add section expansion state management with localStorage persistence
- Update section headers with chevron toggle controls
- Implement conditional task row rendering based on section state
- Add Expand All / Collapse All toolbar controls
- Add CSS styles for chevron rotation animation and section headers
- Add comprehensive tests for collapsible section behavior

package.json

@@ -11,6 +11,7 @@
     "build:exe": "pnpm build && pnpm --filter @dustinbyrne/kb build:exe",
     "build:exe:all": "pnpm build && pnpm --filter @dustinbyrne/kb build:exe:all",
     "test": "pnpm -r test",
+    "test:coverage": "pnpm -r test -- --coverage",
     "typecheck": "pnpm -r typecheck",
     "changeset": "changeset",
     "version": "changeset version",