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

packages/cli/src/__tests__/extension.test.ts

@@ -80,6 +80,10 @@ describe("kb pi extension", () => {
         "kb_task_attach",
         "kb_task_pause",
         "kb_task_unpause",
+        "kb_task_duplicate",
+        "kb_task_import_github",
+        "kb_task_import_github_issue",
+        "kb_task_browse_github_issues",
       ];
 
       for (const name of expected) {