a5f8e6c9d4
- Box class with border-style, title, fg/bg slots - render-box dispatches through backend protocol - draw-border for borders, draw-rect for background - draw-text for title below top border - 7 tests: defaults, border, background, title, no-border, zero-size, minimum-size - 13 assertions, 100% GREEN - ASDF updated with src/components module - modern-backend now accepts :output-stream initarg