misc: upgrade to Expo SDK 58

Move the app from SDK 55 onto React Native 0.88 so later widget and auth work can use the SDK 58 packages.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/(tabs)/_layout.tsx

@@ -1,4 +1,4 @@
-import { NativeTabs } from 'expo-router/unstable-native-tabs';
+import { NativeTabs } from 'expo-router/native-tabs';
 
 export default function TabLayout() {
   return (