feat: Export session to file for sharing

[fuleinist]

Important

Thanks for taking the time to suggest an enhancement!
Please search existing issues to see if a similar feature has already been requested.

What would you like to be added?
Add a command to export the current session context (conversation history, loaded files, and state) to a JSON file that can be shared or resumed later.

Why is this needed?
Currently sessions are ephemeral. Users cannot share their work-in-progress with teammates or save their session for later continuation.

Additional context
Use case: A developer wants to share their debugging session with a colleague, or save their work before restarting the CLI. The exported file could be loaded with --session-file flag.

[kampitojha]

I want to work on this issue

[alexjyong]

Is this still planned? This is standard in other platforms such as Claude, Qwen and opencode. No reason it shouldn't be here.

[Adib234]

Thank you for bringing this to our attention. Right now, our engineering team is focusing all resources on critical system maintenance and core stability. Because of this, we don't have immediate plans to address this specific issue, but we truly appreciate you flagging it for us.