fix: align drainage frontend configuration

tests/browser/agent-panel-resize.e2e.ts

@@ -1,7 +1,7 @@
 import { expect, test } from "playwright/test";
 
 test("Agent panel resizes by drag without exceeding half the viewport", async ({ page }) => {
-  await page.goto("/", { waitUntil: "networkidle" });
+  await page.goto("/", { waitUntil: "domcontentloaded" });
 
   const panel = page.locator('aside[aria-label="Agent 命令面板"]');
   const resizeHandle = page.getByRole("separator", { name: "调整 Agent 面板宽度" });
@@ -13,7 +13,7 @@ test("Agent panel resizes by drag without exceeding half the viewport", async ({
 
   await page.mouse.move(handleBox!.x + handleBox!.width / 2, handleBox!.y + handleBox!.height / 2);
   await page.mouse.down();
-  await page.mouse.move(1_200, handleBox!.y + handleBox!.height / 2);
+  await page.mouse.move(1_200, handleBox!.y + handleBox!.height / 2, { steps: 10 });
   await page.mouse.up();
 
   await expect.poll(async () => (await panel.boundingBox())?.width).toBe(720);
@@ -26,12 +26,12 @@ test("Agent panel resizes by drag without exceeding half the viewport", async ({
 });
 
 test("collapsed Agent rail is compact and expands as one clear action", async ({ page }) => {
-  await page.goto("/", { waitUntil: "networkidle" });
+  await page.goto("/", { waitUntil: "domcontentloaded" });
 
   await page.getByRole("button", { name: "折叠 Agent 面板" }).click();
 
   const rail = page.locator('aside[aria-label="Agent 折叠栏"]');
-  const expandButton = page.getByRole("button", { name: /展开排水助手面板/ });
+  const expandButton = page.getByRole("button", { name: /展开 Agent 助手面板/ });
   await expect(rail).toBeVisible();
   await expect(rail).toHaveCSS("width", "72px");
   await expect(expandButton).toHaveAttribute("title", /当前|正在/);
@@ -51,7 +51,7 @@ test.describe("mobile touch layout", () => {
   test.use({ hasTouch: true, isMobile: true, viewport: { width: 375, height: 812 } });
 
   test("mobile Agent toggle opens the conversation panel by touch", async ({ page }) => {
-    await page.goto("/", { waitUntil: "networkidle" });
+    await page.goto("/", { waitUntil: "domcontentloaded" });
 
     const openButton = page.getByRole("button", { name: "打开 Agent 面板" });
     const buttonBox = await openButton.boundingBox();
@@ -67,7 +67,7 @@ test.describe("mobile touch layout", () => {
 test("mobile alert summary opens the Agent conversation panel", async ({ page }) => {
   await page.clock.setFixedTime(new Date("2026-07-21T10:40:00+08:00"));
   await page.setViewportSize({ width: 375, height: 812 });
-  await page.goto("/", { waitUntil: "networkidle" });
+  await page.goto("/", { waitUntil: "domcontentloaded" });
 
   await page.getByRole("button", { name: /查看异常处置面板/ }).click();
   await page.getByRole("button", { name: "工况汇总" }).click();