Module ui 

Renderer-neutral UI types: theme, style, color.

Every type here is pure data with no renderer-specific dependency. Renderer crates (lattice-ui-tui, future lattice-ui-gpui) ship adapters that convert these into their native style types (ratatui Style / Color, GPUI Hsla, etc.). The host owns the canonical theme; each renderer maintains a cached adapted view for hot-path reads.

Phase 5.3 introduces these types as the substrate for the eventual App.theme: host::ui::Theme migration. The current Phase 5.3 slice adds them ALONGSIDE the existing TUI-typed App.theme (which keeps its current shape) – App.host_theme is the canonical neutral state, and sync_theme_from_config writes both. Later cleanup will remove the duplication once GPUI lands and render code reads from a renderer-cached view.

Modules

theme

The host Theme + its SyntaxStyle → visual style mapping.

theme_options

Renderer-neutral UI / theme options.