Add a task to improve existing project setup and documentation for the GitHub Copilot lab

This issue tracks improvements to the existing lab project setup and related documentation so the repository is easier to follow and use in GitHub Copilot exercises.

Review the current lab structure
Identify unclear setup or configuration steps
Improve documentation clarity and consistency
Verify the project works as expected in the target environment
Keep the change focused on developer experience

首先检查当前的 lab 结构、setup 和配置步骤，然后在目标环境中验证项目。完成的标准是文档更清晰且一致，setup 步骤易于理解，并且 lab 按预期工作，同时不超出开发者体验的范围。