Auto-add project subdirectories as workspaces when running through Docker

Summary

When running through Docker, the project directory should automatically have its subdirectories added as workspaces.

Expected Behavior

When a project directory is mounted or opened via Docker, all of its subdirectories should be automatically discovered and added as workspaces, removing the need for users to manually configure them.

Current Behavior

Subdirectories within the project directory are not automatically added as workspaces when running through Docker.

Why This Matters

This improvement would streamline the Docker-based workflow and reduce manual setup steps for users.

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This issue was created by an AI agent (OpenHands) on behalf of the user.