fix: file handle not persisted when importing excalidraw files (#5372)

src/data/json.ts

@@ -98,7 +98,12 @@ export const loadFromJSON = async (
     // gets resolved. Else, iOS users cannot open `.excalidraw` files.
     // extensions: ["json", "excalidraw", "png", "svg"],
   });
-  return loadFromBlob(await normalizeFile(file), localAppState, localElements);
+  return loadFromBlob(
+    await normalizeFile(file),
+    localAppState,
+    localElements,
+    file.handle,
+  );
 };
 
 export const isValidExcalidrawData = (data?: {