feat(组件): 添加虚拟滚动优化应用网格性能

为AppGrid组件添加vue-virtual-scroller实现虚拟滚动功能，当应用数量超过50个时自动启用
更新package.json添加vue-virtual-scroller依赖
添加vue-virtual-scroller的类型声明
优化网格布局响应式处理，根据窗口宽度动态调整列数

src/vite-env.d.ts

@@ -21,3 +21,26 @@ declare interface IpcChannels {
 }
 
 declare const __APP_VERSION__: string;
+
+// vue-virtual-scroller type declarations
+declare module "vue-virtual-scroller" {
+  import { DefineComponent } from "vue";
+
+  export const RecycleScroller: DefineComponent<{
+    items: any[];
+    itemSize: number;
+    keyField?: string;
+    direction?: "vertical" | "horizontal";
+    buffer?: number;
+  }>;
+
+  export const DynamicScroller: DefineComponent<{
+    items: any[];
+    minItemSize: number;
+    keyField?: string;
+    direction?: "vertical" | "horizontal";
+    buffer?: number;
+  }>;
+
+  export const DynamicScrollerItem: DefineComponent<{}>;
+}