Fixes from subagent review:
- render-tests.lisp: added (in-suite box-suite) — tests were registered
to default suite, never executed by runner
- dirty-tests.lisp: same fix
- cl-tui.asd: version 0.2.0 → 0.3.0
- render.lisp: component-children default method (c t) nil for
protocol completeness (component-parent already had this)
- Text class with content, fg/bg, wrap-mode (:word or :none)
- Span class for inline styled segments (bold, italic, etc.)
- render-text dispatches through backend's draw-text
- word-wrap function splits text at word boundaries
- split-string utility for whitespace tokenization
- 9 new tests: creation, content, empty, truncation, word-wrap,
single-word, span creation, span storage
- modern-backend now accepts :output-stream
- ASDF updated with text component
- 28 total component tests, 100% GREEN
- 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
