Feature Request: "Quote to input" button when selecting text in chat

Current behavior

When reading AI responses in the chat window, if I want to reply to a specific sentence the AI said, I have to:

1. Select the text
2. Ctrl+C to copy
3. Click the input box
4. Type > manually to format as quote
5. Ctrl+V to paste

This is tedious, especially when I want to quote multiple passages and add my comments under each one.

Desired behavior

1. Select text in the chat window
2. A "Quote" button appears near the selection
3. Click the button → the selected text is automatically inserted into the chat input box with > prefix (markdown blockquote format)
4. Can repeat for multiple quotes → each one appends to the input box
5. User adds their thoughts under each quote and sends everything at once

Why this matters

This is a standard UX pattern in messaging apps (reply/quote gesture). In AI-assisted coding, users frequently need to challenge, clarify, or build on specific points the AI made. Without a quick quote mechanism, back-and-forth discussions are slower and more error-prone.

Environment

• VS Code extension (Windows 11)
• Chat opened as editor tab