- 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
Fixes during debugging:
- Variable scope: loop's closing parens closed the let* prematurely,
making children/is-row/pr/pb undefined in own-size calculation
- gap NIL bug: make-layout-node passed :gap nil (from &key default)
to make-instance, overriding :initform 0 → (* nil ...) crash
- Child order: push (LIFO) in add-child reversed children order;
changed to nconc (FIFO), removed the compensating reverse
- Fixed distribute-sizes to base all children from their fixed size
then apply grow/shrink on top, instead of treating fixed-size
children as non-participating
