fix: Do not update page title for single file public shares

The filename is empty and is alerady set on page load

Signed-off-by: Julius Knorr <jus@bitgrid.net>

Author: juliusknorr

src/views/Viewer.vue

@@ -634,7 +634,7 @@ export default defineComponent({
 
 			// swap title with original one
 			const title = document.getElementsByTagName('head')[0].getElementsByTagName('title')[0]
-			if (title && !title.dataset.old) {
+			if (title && !title.dataset.old && fileName !== '') {
 				title.dataset.old = document.title
 				this.updateTitle(fileName)
 			}