fix: 修复 Android 闪退问题 - SecureStore 异步调用

问题：
- NativeStorage 使用了同步方法调用 expo-secure-store
- expo-secure-store 的正确 API 是异步的（getItemAsync/setItemAsync/deleteItemAsync）
- 在 Android 上同步调用不存在的方法导致应用崩溃

修复：
- 将 Storage 接口改为异步方法
- 使用 SecureStore.getItemAsync/setItemAsync/deleteItemAsync
- removeItem 使用 deleteItemAsync 而不是设置空字符串

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/templates/[id].tsx

@@ -87,6 +87,7 @@ export default function TemplateDetailScreen() {
   const [menuVisible, setMenuVisible] = useState(false);
   const [loadingLooks, setLoadingLooks] = useState(true);
   const [errorMessage, setErrorMessage] = useState<string | null>(null);
+  const [retryTrigger, setRetryTrigger] = useState(0);
   const abortControllerRef = useRef<AbortController | null>(null);
   const imageCache = useRef(new Set<string>());
 
@@ -242,22 +243,15 @@ export default function TemplateDetailScreen() {
     cache.delete(`tag:${current?.title}`);
     setErrorMessage(null);
     setLoadingLooks(true);
-
-    const event = new Event('retry');
-    window.dispatchEvent(event);
+    setRetryTrigger(prev => prev + 1);
   }, [id, current?.title]);
 
   useEffect(() => {
-    const handleRetryEvent = () => {
+    if (retryTrigger > 0) {
       const newController = new AbortController();
       abortControllerRef.current = newController;
-    };
-
-    window.addEventListener('retry', handleRetryEvent);
-    return () => {
-      window.removeEventListener('retry', handleRetryEvent);
-    };
-  }, []);
+    }
+  }, [retryTrigger]);
 
   const handleGenerate = () => {
     if (!resolvedTemplateId) {