[Feature] Keyboard shortcut to copy last response to clipboard

When I want to paste Claude's response somewhere else — a code review comment, a Slack message, a doc — I naturally reach for select-all and copy. But that doesn't work well in a terminal: you get hard line breaks baked in, and Markdown syntax doesn't survive the trip.

What I'd love: a keyboard shortcut that copies the last response to the clipboard, preserving the raw Markdown. Something like Ctrl+Shift+C (or configurable via keybindings.json). How exactly this is achieved — whether it's a fixed shortcut, a slash command like /copy, or something in the keybindings system — I'll leave that to you.

Happy to discuss what feels most natural here!