feat: 增强 Transfers 页面文件浏览功能

- 在 SftpFilePickerModal 中添加搜索功能
- 添加显示/隐藏文件切换按钮（参考 SftpView）
- Remote->Many 模式下目标连接列表自动排除源连接
- 全选功能自动排除源连接
- 添加空状态提示信息
- 优化用户体验和交互逻辑

frontend/src/router/index.ts

@@ -14,16 +14,21 @@ const routes: RouteRecordRaw[] = [
     component: () => import('../layouts/MainLayout.vue'),
     meta: { requiresAuth: true },
     children: [
-      {
-        path: '',
-        name: 'Home',
-        redirect: '/connections',
-      },
-      {
-        path: 'connections',
-        name: 'Connections',
-        component: () => import('../views/ConnectionsView.vue'),
-      },
+      {
+        path: '',
+        name: 'Home',
+        redirect: '/connections',
+      },
+      {
+        path: 'transfers',
+        name: 'Transfers',
+        component: () => import('../views/TransfersView.vue'),
+      },
+      {
+        path: 'connections',
+        name: 'Connections',
+        component: () => import('../views/ConnectionsView.vue'),
+      },
       {
         path: 'terminal/:id',
         name: 'Terminal',
@@ -45,12 +50,12 @@ const router = createRouter({
 
 router.beforeEach(async (to, _from, next) => {
   const authStore = useAuthStore()
-  if (to.meta.public) {
-    if (authStore.isAuthenticated && to.path === '/login') {
-      next('/connections')
-    } else {
-      next()
-    }
+  if (to.meta.public) {
+    if (authStore.isAuthenticated && to.path === '/login') {
+      next('/connections')
+    } else {
+      next()
+    }
     return
   }
   if (to.meta.requiresAuth && !authStore.isAuthenticated) {