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/components/call/CallScreen.tsx

@@ -267,12 +267,12 @@ const CallScreen: React.FC = () => {
 
 const styles = StyleSheet.create({
   container: {
-    ...StyleSheet.absoluteFillObject,
+    ...StyleSheet.absoluteFill,
     backgroundColor: '#1A1A2E',
     zIndex: 9999,
   },
   background: {
-    ...StyleSheet.absoluteFillObject,
+    ...StyleSheet.absoluteFill,
     backgroundColor: '#1A1A2E',
   },
   topBar: {
@@ -334,7 +334,7 @@ const styles = StyleSheet.create({
     letterSpacing: 0.3,
   },
   fullScreenVideo: {
-    ...StyleSheet.absoluteFillObject,
+    ...StyleSheet.absoluteFill,
     backgroundColor: '#1A1A2E',
   },
   localVideoContainer: {