Fixed numerous bugs within talk and file upload

lib/view/pages/talk/chatMessage.dart

@@ -30,7 +30,7 @@ class ChatMessage {
   Widget getWidget() {
 
     if(file == null) {
-      return SelectableLinkify(
+      return Linkify(
         text: content,
         onOpen: onOpen,
       );
@@ -49,10 +49,7 @@ class ChatMessage {
       placeholder: (context, url) {
         return const Padding(padding: EdgeInsets.all(10), child: CircularProgressIndicator());
       },
-      imageUrl: "https://${EndpointData().nextcloud().full()}/core/preview?fileId=${file!.id}&x=100&y=-1&a=1",
-      httpHeaders: {
-        "Authorization": "Basic ${AccountData().buildHttpAuthString()}"
-      },
+      imageUrl: "https://${AccountData().buildHttpAuthString()}@${EndpointData().nextcloud().full()}/index.php/core/preview?fileId=${file!.id}&x=100&y=-1&a=1",
     );
   }