chore: update styles, add splash config, and improve search functionality

- Replace deprecated StyleSheet.absoluteFillObject with StyleSheet.absoluteFill (React Native 0.76+)
- Add splash screen configuration in app.json
- Fix duplicate UIBackgroundModes and add audio mode for iOS
- Disable Android ripple effect on tab bar buttons
- Improve SmartImage loading state to prevent unnecessary re-renders
- Refactor ImageGrid to use mainUri with separate previewUrl for better preview handling
- Add market search support with trade items tab in SearchScreen
- Pass homeTab prop to SearchScreen for context-aware search behavior
- Simplify fetchUnreadCount return type to void in MessageSyncService
- Fix StatusBar import from expo to react-native in ChatScreen

src/screens/schedule/CourseDetailScreen.tsx

@@ -198,7 +198,7 @@ const CourseDetailScreen: React.FC = () => {
     return (
       <SafeAreaView style={styles.container}>
         <View style={styles.mask}>
-          <Pressable style={StyleSheet.absoluteFillObject} onPress={() => router.back()} />
+          <Pressable style={StyleSheet.absoluteFill} onPress={() => router.back()} />
         </View>
       </SafeAreaView>
     );
@@ -207,7 +207,7 @@ const CourseDetailScreen: React.FC = () => {
   return (
     <SafeAreaView style={styles.container}>
       <View style={styles.mask}>
-        <Pressable style={StyleSheet.absoluteFillObject} onPress={() => router.back()} />
+        <Pressable style={StyleSheet.absoluteFill} onPress={() => router.back()} />
         <View style={styles.card}>
           <View style={styles.header}>
             <View style={styles.headerLeft}>