fix the unfixeble

mobile/app/folder/[id].tsx

@@ -34,8 +34,8 @@ export default function FolderScreen() {
       return;
     }
     setFolder(current);
-    setSubfolders(await getFolderFolders(id));
-    setFiles(await getFiles(id));
+    setSubfolders((await getFolderFolders(id)).filter(f => f.exists));
+    setFiles((await getFiles(id)).filter(f => f.exists));
   }, [id, router]);
 
   useFocusEffect(

mobile/app/index.tsx

@@ -82,7 +82,7 @@ export default function Index() {
   const [sections, setSections] = useState<FileSection[]>([]);
 
   const load = useCallback(async () => {
-    const files = await getFiles();
+    const files = (await getFiles()).filter(f => f.exists);
     setSections(groupFilesByDay(files));
   }, []);