fix: 修复研究助手首屏滚动与欢迎区布局

frontend/tests/ai.spec.ts

@@ -84,13 +84,13 @@ test("model settings, text stream, contextual query, confirmation and preserved
   await page.getByRole("button", { name: "Alpha 管理", exact: true }).click();
   await page.getByRole("textbox", { name: "搜索 Alpha" }).fill("TEST0001");
   await page.getByRole("button", { name: "查询", exact: true }).click();
+  // Global tools sit below drawers; open the assistant before the Alpha detail.
+  await page.getByRole("button", { name: "切换研究助手" }).click();
   await page.locator(".alpha-link").click();
   await page.getByRole("tab", { name: "研究信息" }).click();
   await page
     .getByRole("textbox", { name: "研究备注" })
     .fill("尚未保存的人工研究草稿");
-  // A global launcher must remain reachable when the detail mask is open.
-  await page.getByRole("button", { name: "切换研究助手" }).click();
   const chat = page.getByRole("complementary", { name: "AI 研究助手" });
   await chat.getByRole("button", { name: "新会话", exact: true }).click();
   await expect(chat.locator(".research-ai-reference")).toContainText(
@@ -430,11 +430,6 @@ test("AI composer preserves literal text, IME input and drafts while generating"
     )
       sent.push(request.postDataJSON().message);
   });
-  await chat
-    .getByRole("button", { name: "查询当前研究对象与已有结果", exact: true })
-    .click();
-  await expect(input).toHaveText("查询当前研究对象与已有结果");
-  expect(sent).toEqual([]);
   await input.fill("SLOW <字段>");
   await input.dispatchEvent("keydown", {
     key: "Enter",