feat: 解决python虚拟环境问题

frontend/e2e/dashboard.spec.ts

@@ -67,11 +67,17 @@ test('manages a task and reads a real run log', async ({ page, request }) => {
   await newTaskDialog
     .getByPlaceholder('参数值 (可选，无值可留空)')
     .fill('full')
+  await newTaskDialog
+    .getByLabel(/虚拟环境目录/)
+    .fill('.venv')
   await newTaskDialog
     .getByText('调用预览 (Runtime Preview)')
     .scrollIntoViewIfNeeded()
   await expect(
-    newTaskDialog.getByText('--mode full', { exact: false }),
+    newTaskDialog.getByText(
+      '.venv\\Scripts\\python.exe main.py --mode full',
+      { exact: false },
+    ),
   ).toBeVisible()
   await page.screenshot({
     path: 'test-results/dashboard-task-editor-runtime.png',