Update prayer time calculation logic and integrate new 'adhan' package for improved accuracy. Remove 'hijri-date' dependency and enhance localization support for city names in multiple languages. Adjust package versions in package.json and package-lock.json.

app/_layout.tsx

@@ -1,12 +1,11 @@
 import FontAwesome from '@expo/vector-icons/FontAwesome';
-import { DarkTheme, DefaultTheme, ThemeProvider } from '@react-navigation/native';
+import { DarkTheme, ThemeProvider } from '@react-navigation/native';
 import { useFonts } from 'expo-font';
 import { Stack } from 'expo-router';
 import * as SplashScreen from 'expo-splash-screen';
 import React, { useEffect } from 'react';
 import 'react-native-reanimated';
 
-import { useColorScheme } from '@/components/useColorScheme';
 import { initializeLanguage } from '@/i18n';
 
 export {
@@ -55,10 +54,8 @@ export default function RootLayout() {
 }
 
 function RootLayoutNav() {
-  const colorScheme = useColorScheme();
-
   return (
-    <ThemeProvider value={colorScheme === 'dark' ? DarkTheme : DefaultTheme}>
+    <ThemeProvider value={DarkTheme}>
       <Stack>
         <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
         <Stack.Screen name="modal" options={{ presentation: 'modal' }} />