fix: 组件库分类默认全部收起

- 新建任务进入编辑器时不再自动展开前两个分组
- 仅在搜索时自动展开匹配分组, 清空搜索恢复收起

src/renderer/src/panels/Palette.tsx

@@ -56,13 +56,8 @@ export function Palette({ catalog, onAdd }: PaletteProps) {
   }, [catalog.groups, filtered]);
 
   useEffect(() => {
-    if (query.trim()) return;
-    setExpanded((current) => current.size ? current : new Set(catalog.groups.slice(0, 2).map((group) => group.id)));
-  }, [catalog.groups, query]);
-
-  useEffect(() => {
-    if (!query.trim()) return;
-    setExpanded(new Set(groups.map((group) => group.id)));
+    if (query.trim()) setExpanded(new Set(groups.map((group) => group.id)));
+    else setExpanded(new Set());
   }, [groups, query]);
 
   const allExpanded = groups.length > 0 && groups.every((group) => expanded.has(group.id));