#20 Updated missing file preview message and download animation

lib/view/pages/talk/components/chatMessage.dart

@@ -38,17 +38,22 @@ class ChatMessage {
 
     return CachedNetworkImage(
       errorWidget: (context, url, error) {
-        return Column(
+        return Padding(padding: const EdgeInsets.only(top: 10), child: Row(
+          crossAxisAlignment: CrossAxisAlignment.center,
           children: [
-            const Icon(Icons.image_not_supported_outlined, size: 35),
-            Text("Keine Dateivorschau:\n${file!.name}", style: const TextStyle(fontWeight: FontWeight.bold))
+            const Icon(Icons.file_open_outlined, size: 35),
+            const SizedBox(width: 10),
+            Expanded(child: Text(file!.name, style: const TextStyle(fontWeight: FontWeight.bold)))
           ],
-        );
+        ));
       },
       alignment: Alignment.center,
       placeholder: (context, url) {
         return const Padding(padding: EdgeInsets.all(10), child: CircularProgressIndicator());
       },
+      fadeInDuration: Duration.zero,
+      fadeOutDuration: Duration.zero,
+      errorListener: (value) {},
       imageUrl: "https://${AccountData().buildHttpAuthString()}@${EndpointData().nextcloud().full()}/index.php/core/preview?fileId=${file!.id}&x=100&y=-1&a=1",
     );
   }
@@ -56,8 +61,6 @@ class ChatMessage {
   void onOpen(LinkableElement link) async {
     if(await canLaunchUrlString(link.url)) {
       await launchUrlString(link.url);
-    } else {
-
     }
   }
 }