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

.claude/settings.local.json

@@ -0,0 +1,9 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(python -c \"import sys,json; d=json.load\\(sys.stdin\\); deps={**d.get\\('dependencies',{}\\), **d.get\\('devDependencies',{}\\)}; [print\\(f'{k}: {v}'\\) for k,v in deps.items\\(\\) if 'navigation' in k or 'tab' in k.lower\\(\\)]\")",
+      "Bash(npx tsc *)",
+      "Bash(echo \"EXIT: $?\")"
+    ]
+  }
+}