perf(app): 添加登录状态检查并优化性能

- 在多个页面添加 isLoggedIn 检查，防止未登录时进行不必要的数据获取
- 使用 React.memo 和 useMemo 优化个人页面徽章渲染性能
- 为 badges API 添加节流机制，避免频繁请求
- 优化图片缓存策略和字符串处理
- 移除调试日志并改进推送通知的认证检查

app/(tabs)/challenges.tsx

@@ -3,6 +3,7 @@ import dayjs from 'dayjs';
 import ChallengeProgressCard from '@/components/challenges/ChallengeProgressCard';
 import { Colors } from '@/constants/Colors';
 import { useAppDispatch, useAppSelector } from '@/hooks/redux';
+import { useAuthGuard } from '@/hooks/useAuthGuard';
 import { useColorScheme } from '@/hooks/useColorScheme';
 import {
   fetchChallenges,
@@ -45,6 +46,8 @@ export default function ChallengesScreen() {
   const theme = (useColorScheme() ?? 'light') as 'light' | 'dark';
   const insets = useSafeAreaInsets();
 
+  const { isLoggedIn } = useAuthGuard()
+
   const colorTokens = Colors[theme];
   const router = useRouter();
   const dispatch = useAppDispatch();