[Feature Request] Having a command that copies the latest response with proper formatting

Description:

A feature like /copy would be helpful for copying text with proper markdown formatting, including bold, headings, and color.

Use Case:

I usually like to copy the response from LLM and view it in another markdown editor with better themes, like Obsidian, Notion, Typora, etc. Many AI chatbot products, including the Claude app, also have a "copy" button, so adding this functionality to Claude Code would enhance usability.

<img width="997" height="257" alt="Image" src="https://github.com/user-attachments/assets/60a7c2bd-334e-4447-82b0-eadc04e99508" />