Expo Unified Theming

Set up one color system that works on iOS and Android at once. Instead of sprinkling Color.ios.* and Color.android.dynamic.* (or hardcoded hex) all over the app, the user gets semantic tokens (background, text, link, ...) that resolve to the right native color per platform, flip with dark/light automatically, and are read through a single useColors() hook.

This is the pattern from the Platano template, packaged so it drops into any Expo Router app.