The single `nuwikiHeading` group linked all six levels to `Title`.
Many popular colorschemes (codedark, gruvbox-light, etc.) define
`Title` as bold-only with no foreground colour, so every heading
rendered as bold text in the Normal colour — H1 and H3 were
visually identical.
Split into nuwikiHeading1..6 and link each to a different accent
(Title / Function / Identifier / Type / Constant / PreProc), matching
the per-level Tree-sitter mapping the Neovim semantic-token side
already uses. The patterns are mutually exclusive: each requires
whitespace immediately after the equals run, so `=` won't match `==`.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
gffranco
04cbe67882