solved most pr comments and a bug

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

@@ -35,7 +35,7 @@ class _ChatTextfieldState extends State<ChatTextfield> {
 
   void share(String shareFolder, List<String> filePaths) {
     for (var element in filePaths) {
-      String fileName = element.split(Platform.pathSeparator).last;
+      var fileName = element.split(Platform.pathSeparator).last;
       FileSharingApi().share(FileSharingApiParams(
           shareType: 10,
           shareWith: widget.sendToToken,
@@ -44,10 +44,10 @@ class _ChatTextfieldState extends State<ChatTextfield> {
     }
   }
 
-  void mediaUpload(List<String>? paths) async {
+  Future<void> mediaUpload(List<String>? paths) async {
     if (paths == null) return;
 
-    String shareFolder = 'MarianumMobile';
+    var shareFolder = 'MarianumMobile';
     WebdavApi.webdav.then((webdav) {
       webdav.mkcol(PathUri.parse('/$shareFolder'));
     });