fix(test): update download path integration test to match tool description

- Update downloadRemoteFileToPath tool description to include IDE-specific path variables
- Add test assertion for usage examples in tool description
- Ensure test expectations match actual tool implementation
- Fix failing integration test for downloadRemoteFileToPath

Author: binggg

mcp/src/tools/download.ts

@@ -421,7 +421,7 @@ export function registerDownloadTools(server: ExtendedMcpServer) {
     "downloadRemoteFileToPath",
     {
       title: "下载远程文件到指定路径",
-      description: "下载远程文件到项目根目录下的指定相对路径。例如：小程序的 Tabbar 等素材图片，必须使用 **png** 格式，可以从 Unsplash、wikimedia【一般选用 500 大小即可、Pexels、Apple 官方 UI 等资源中选择来下载。",
+      description: "下载远程文件到项目根目录下的指定相对路径。Claude Code: WORKSPACE_FOLDER_PATHS, Qwen Code: PROJECT_ROOT, CodeBuddy: GITHUB_WORKSPACE。例如：小程序的 Tabbar 等素材图片，必须使用 **png** 格式，可以从 Unsplash、wikimedia【一般选用 500 大小即可、Pexels、Apple 官方 UI 等资源中选择来下载。",
       inputSchema: {
         url: z.string().describe("远程文件的 URL 地址"),
         relativePath: z.string().describe("相对于项目根目录的路径，例如：'assets/images/logo.png' 或 'docs/api.md'。不允许使用 ../ 等路径遍历操作。")

tests/download-path-integration.test.js

@@ -70,7 +70,8 @@ test('downloadRemoteFileToPath tool is available and has correct schema', async
     expect(downloadPathTool.description).toContain('Claude Code: WORKSPACE_FOLDER_PATHS');
     expect(downloadPathTool.description).toContain('Qwen Code: PROJECT_ROOT');
     expect(downloadPathTool.description).toContain('CodeBuddy: GITHUB_WORKSPACE');
-    console.log('✅ Tool description contains supported editor information');
+    expect(downloadPathTool.description).toContain('小程序的 Tabbar 等素材图片');
+    console.log('✅ Tool description contains supported editor information and usage examples');
 
     console.log('✅ downloadRemoteFileToPath tool schema validation passed');