* feat(tui): make select list layout configurable * feat(tui): tune select list column sizing * test(tui): fix select list alignment assertions
* Add frontmatter utility and tidy coding agent prompts * Add frontmatter parsing utilities and tests * Parse frontmatter with YAML parser * Simplify frontmatter parsing utilities * strip body in 1 place * Improve frontmatter parsing error handling * Normalize multiline skill and select-list descriptions