Themes previously embedded layout-affecting values (baseSize, lineHeight,
density, letterSpacing) alongside visual identity properties, coupling
user ergonomic preferences to color theme selection.
This change establishes a clear separation of concerns:
- Themes own: palette, font family, border-radius, and font-coupled
letterSpacing (e.g. Inter's -0.005em tracking)
- Layout scale (baseSize, lineHeight, density) is standardized via
DEFAULT_TYPOGRAPHY and DEFAULT_LAYOUT — not overridden per theme
All themes now spread DEFAULT_TYPOGRAPHY and DEFAULT_LAYOUT as their
base, removing silent divergence and making future layout settings
(e.g. user-configurable density) trivially applicable across all themes
without per-theme special-casing.
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