Description
Stylize journalism 'TK'/'tk' to-come placeholders so they pop as fill-in reminders. Decided: whole-word match (TK/tk/TKTK repeats), case-insensitive, prose only (skip code files, code spans, URLs, frontmatter, wikilink/link targets - same exclusions as spellcheck). Render as a filled 'badge' chip: padded ' TK ', bold, loud fg/bg pair. New theme token TK added to all 3 palettes (loud accent: magenta-ish dark, matching light/charm). Implement as a prose post-pass in buildVisual (like spellPass/grammarPass) splitting prose spans and re-emitting TK tokens with the badge style. TDD.
Acceptance Criteria
- #1 Standalone TK/tk (any case) and TKTK render as a bold filled badge
- #2 Words containing tk (catkin, Atkins, outkast) are NOT highlighted
- #3 TK inside code files, code spans, URLs, and frontmatter is not highlighted
- #4 theme.TK added to all three themes