refactor(doc-item): renderCover icon src durch doc.iconSrc ersetzen.

- pdf.svg bearbeiten

src/client/dd-hub-react/public/assets/icons/file/pdf.svg

@@ -3,7 +3,7 @@
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
 <svg version="1.1" id="_x35_" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" 
-	 viewBox="0 0 512 512"  xml:space="preserve">
+	 viewBox="-200 -200 912 912"  xml:space="preserve">
 <g>
 	<polygon style="fill:#B12A27;" points="475.435,117.825 475.435,512 47.791,512 47.791,0.002 357.613,0.002 412.491,54.881 	"/>
 	<rect x="36.565" y="34.295" style="fill:#F2F2F2;" width="205.097" height="91.768"/>

src/client/dd-hub-react/src/sections/document/doc-item.tsx

@@ -101,7 +101,7 @@ export function DocItem({
         <Box
             component="img"
             alt={doc.name}
-            src="assets/icons/file/unknown.svg"
+            src={doc.iconSrc}
             sx={{
                 top: 0,
                 width: 1,