feat(chat): 优化聊天面板交互体验 — 推理折叠/智能滚动/工具中文名/代码块按钮

tests/web/components/chat/ReasoningPart.test.tsx

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+import { fireEvent, screen } from "@testing-library/react";
+import { describe, expect, test } from "bun:test";
+import { createElement } from "react";
+
+import { ReasoningPart } from "../../../../src/web/consoles/workbench/components/chat/parts/ReasoningPart";
+import { renderWithProviders } from "../../test-utils";
+
+describe("ReasoningPart", () => {
+  test("流式状态时自动展开显示文本", () => {
+    const part = { state: "streaming", text: "正在思考...", type: "reasoning" };
+
+    renderWithProviders(createElement(ReasoningPart, { part }));
+
+    expect(screen.getByText("正在思考...")).toBeTruthy();
+    expect(screen.getByText("思考中")).toBeTruthy();
+  });
+
+  test("完成状态时显示思考完成标签", () => {
+    const part = { state: "complete", text: "思考内容", type: "reasoning" };
+
+    renderWithProviders(createElement(ReasoningPart, { part }));
+
+    expect(screen.getByText("思考完成")).toBeTruthy();
+  });
+
+  test("无状态时默认收起", () => {
+    const part = { text: "默认内容", type: "reasoning" };
+
+    const { container } = renderWithProviders(createElement(ReasoningPart, { part }));
+
+    const expanded = container.querySelector('[aria-expanded="true"]');
+    expect(expanded).toBeNull();
+  });
+
+  test("用户点击折叠后尊重用户意图", () => {
+    const part = { state: "streaming", text: "思考中内容", type: "reasoning" };
+
+    const { container } = renderWithProviders(createElement(ReasoningPart, { part }));
+
+    const collapseHeader = container.querySelector(".ant-collapse-header");
+    expect(collapseHeader).toBeTruthy();
+
+    if (collapseHeader) {
+      fireEvent.click(collapseHeader);
+    }
+
+    expect(screen.getByText("思考中内容")).toBeTruthy();
+  });
+});