export declare function useNTheme(): {
    theme: string;
    setTheme: (newTheme: string) => void;
    toggleTheme: () => void;
    isDarkMode: boolean;
    colors: {
        accent: string;
        background: string;
        surface: string;
        foreground: string;
        muted: string;
        border: string;
    };
    headerConfig: {
        headerStyle: {
            backgroundColor: string;
        };
        headerTintColor: string;
        headerShadowVisible: boolean;
        headerBackButtonDisplayMode: "minimal";
    };
};
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