Changed how the preview is loaded to improve CSP compatibility

Author: Jialecl

packages/lib/src/file-input/utils.ts

@@ -4,13 +4,7 @@ export const getFilePreview = async (file: File): Promise<string> => {
   if (file.type.includes("video")) return "filled_movie";
   else if (file.type.includes("audio")) return "music_video";
   else if (file.type.includes("image")) {
-    return new Promise<string>((resolve) => {
-      const reader = new FileReader();
-      reader.readAsDataURL(file);
-      reader.onload = (e) => {
-        resolve(e.target?.result as string);
-      };
-    });
+    return Promise.resolve(URL.createObjectURL(file));
   } else return "draft";
 };