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code/app/app-rn3/store/app.ts

@@ -0,0 +1,13 @@
+import { create } from "zustand";
+
+export type ThemeScheme = "light" | "dark" | "system";
+
+interface AppState {
+  themeScheme: ThemeScheme;
+  setThemeScheme: (theme: ThemeScheme) => void;
+}
+
+export const useAppStore = create<AppState>((set) => ({
+  themeScheme: "system",
+  setThemeScheme: (theme) => set({ themeScheme: theme }),
+}));