Ipad适配问题

client/app/index.tsx

@@ -1,14 +1,18 @@
 import { useEffect } from 'react';
-import { ActivityIndicator, StyleSheet, View } from 'react-native';
+import { ActivityIndicator, StyleSheet, View, useWindowDimensions } from 'react-native';
 import { useRouter } from 'expo-router';
 
 import { getOnboardingCompleted, getConsentAccepted } from '@/src/storage/appStorage';
+import { clampContentWidth, isIPadLike } from '@/src/utils/device';
 
 /**
  * 启动分发：根据 consent 和 onboarding 状态跳转
  */
 export default function Index() {
   const router = useRouter();
+  const { width, height } = useWindowDimensions();
+  const isTablet = isIPadLike(width, height);
+  const loaderWidth = isTablet ? clampContentWidth(width, 680, 24) : undefined;
 
   useEffect(() => {
     let cancelled = false;
@@ -41,11 +45,24 @@ export default function Index() {
 
   return (
     <View style={styles.container}>
-      <ActivityIndicator />
+      <View style={[styles.loaderWrap, loaderWidth ? { width: loaderWidth } : null]}>
+        <ActivityIndicator />
+      </View>
     </View>
   );
 }
 
 const styles = StyleSheet.create({
-  container: { flex: 1, alignItems: 'center', justifyContent: 'center' },
+  container: {
+    flex: 1,
+    width: '100%',
+    height: '100%',
+    alignSelf: 'stretch',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  loaderWrap: {
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
 });