Feature Request: Better support for VS Code multi-folder workspaces

Use Case

I mainly do full-stack development and work with multiple repositories simultaneously. VS Code's multi-folder workspace is my daily working environment.

Current Behavior

When using Codex in VS Code multi-folder workspaces, it cannot well identify the overall project structure across different folders/repos. It fails to perceive cross-directory dependencies, file relationships and global configurations.

Suggested Improvement

Optimize Codex to fully adapt to VS Code multi-folder workspaces:
Recognize all folders and repositories loaded in the current workspace
Analyze cross-folder code references, imports and dependencies
Provide context-aware code suggestions, refactoring and explanations based on the entire workspace
Expected Benefit
This will greatly improve the development experience for multi-repo and full-stack scenarios, and make Codex more practical for complex project architectures.

<img width="1038" height="276" alt="Image" src="https://github.com/user-attachments/assets/87f42d4d-d090-481a-baf4-fe72581d1ae2" />