cdafc37a2f
Implements structured choice cards for the v0.8.43 truth-surface tracker. When Brother Whale needs user input, it surfaces a bordered card with: - A question prompt - Numbered options with (default) marker - Arrow/j/k navigation and 1-9 number-key shortcuts - Enter to confirm, Esc to cancel - Decision results surfaced as status messages The widget compiles and the keyboard routing is wired into the main event loop. Rendering overlay wire-up follows in the next commit.