统一页面右上角操作区（05-31-unified-page-header-actions）

client/tests/e2e/pc-detail-mobile-visual-wave3.spec.ts

@@ -1100,8 +1100,10 @@ test("Wave3 PC 详情和通知中心视觉截图", async ({ page }) => {
   await page.goto("/contracts-registry?projectId=project-wave3");
   await expect(page.getByRole("heading", { name: "合同", exact: true })).toBeVisible();
   await expect(page.getByTestId("contracts-registry-table").getByTestId("contracts-registry-row")).toBeVisible();
-  await expect(page.getByRole("button", { name: "导出" })).toBeVisible();
-  await page.getByRole("button", { name: "筛选" }).click();
+  await page.locator(".ops-command-bar__actions").getByRole("button", { name: "更多" }).click();
+  await expect(page.getByRole("menuitem", { name: "导出 CSV" })).toBeVisible();
+  await page.keyboard.press("Escape");
+  await page.getByRole("button", { name: "筛选", exact: true }).click();
   await expect(page.getByTestId("contracts-advanced-filters")).toBeVisible();
   await page.getByRole("button", { name: "新增合同" }).click();
   await expect(page.getByTestId("contracts-editor-panel")).toBeVisible();