fix all type errors

components/Preview.tsx

@@ -1,14 +1,7 @@
 import React from 'react'
+import { IPdfProps } from '../interfaces/IPdfProps'
 
-export default function Preview({
-  pdfIsLoading,
-  pdfError,
-  pdfUrl,
-}: {
-  pdfIsLoading: boolean
-  pdfError: string
-  pdfUrl: string
-}) {
+export default function Preview({ pdfIsLoading, pdfError, pdfUrl }: IPdfProps) {
   if (pdfIsLoading) {
     return <div>Lade&hellip;</div>
   }