Improve: copilot: test experience

[Lei Qu (quge009)]

1. smoothing test experience

• Frontend
  • for development env, start the client at localhost (for easier test)
  • for production env, start the client at relative api (for flexible deployment)
• Backend
  • for AGENT_LOCAL mode, enable Cross-Origin Resource Sharing (for easier test)
  • for NON_AGENT_LOCAL mode, disable Cross-Origin Resource Sharing (for security)

2. add multi-user test scenraio

• add new npm test command template to start 2 clients with two different user names at two different ports

[Copilot]

Pull Request Overview

This PR improves the test experience for the copilot chat system by adding environment-specific configurations for easier development and testing. The changes enable different backend URLs and CORS settings based on the environment, and add support for multi-user testing scenarios.

Key changes include:

• Environment-aware configuration for frontend and backend communication
• Conditional CORS enabling for local development
• Multi-user testing setup with new npm scripts

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/copilot-chat/src/requirements.txt	Adds flask-cors dependency for CORS support
src/copilot-chat/src/copilot_agent/utils/authentication.py	Adds "dev.eva" as an additional test user
src/copilot-chat/src/copilot_agent/copilot_service.py	Implements conditional CORS enabling for local development
contrib/copilot-plugin/src/index.tsx	Enables development mode with environment-based user configuration
contrib/copilot-plugin/src/app/ChatHistory.tsx	Adds environment-aware backend URL configuration
contrib/copilot-plugin/src/app/ChatBox.tsx	Adds environment-aware backend URL configuration
contrib/copilot-plugin/package.json	Adds multi-user test scripts for different ports
contrib/copilot-plugin/README.md	Documents the new multi-user test commands

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