Merge pull request #94 from dialmedu/fix/paste-from-clipboard

small fix, check that dataUrls are valid

frontend/src/components/ImageUpload.tsx

@@ -106,7 +106,9 @@ function ImageUpload({ setReferenceImages }: Props) {
       // Convert images to data URLs and set the prompt images state
       Promise.all(files.map((file) => fileToDataURL(file)))
         .then((dataUrls) => {
+          if(dataUrls.length > 0) {
             setReferenceImages(dataUrls.map((dataUrl) => dataUrl as string));
+          }
         })
         .catch((error) => {
           // TODO: Display error to user