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/home/HomeScreen.tsx

@@ -902,6 +902,7 @@ export const HomeScreen: React.FC = () => {
         <StatusBar barStyle={statusBarStyle} backgroundColor={colors.background.paper} />
         <SearchScreen
           onBack={() => setShowSearch(false)}
+          homeTab={homeTab}
         />
       </SafeAreaView>
     );