Description

Amp recently adopted a command palette with search, like Crush has, over / commands. They also made / open the command palette, so people used to tools like Claude Code and Codex and whatnot easily discover the palette and don't even have to adopt a new shortcut.

Assuming there aren't already plans to use / at the very beginning of an otherwise completely empty prompt for triggering something, opening Crush's existing palette seems like a fairly easy UX improvement.

Closes: #523