onboarding: 选项字体与问题一致、底部间距、提醒页文案与移除底部 Skip

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

client/components/onboarding/OnboardingLayout.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
 import { View, StyleSheet, SafeAreaView, TouchableOpacity, StatusBar, Text, Image, Platform } from 'react-native';
 import { useTranslation } from 'react-i18next';
-import { OnboardingColors } from '@/constants/OnboardingTheme';
+import { OnboardingColors, OnboardingFont } from '@/constants/OnboardingTheme';
 
 interface OnboardingLayoutProps {
   children: React.ReactNode;
@@ -119,13 +119,13 @@ const styles = StyleSheet.create({
   questionTitle: {
     fontSize: 22,
     color: OnboardingColors.questionTitle,
-    fontFamily: Platform.OS === 'ios' ? 'PingFang TC' : 'sans-serif',
+    fontFamily: OnboardingFont.question,
     flex: 1,
   },
   progressText: {
     fontSize: 18,
     color: OnboardingColors.textProgress,
-    fontFamily: Platform.OS === 'ios' ? 'PingFang TC' : 'sans-serif',
+    fontFamily: OnboardingFont.question,
     marginLeft: 10,
   },
   content: {