TF-3084 Handle drop image to identity editor for public asset

lib/features/composer/presentation/composer_controller.dart

@@ -385,7 +385,7 @@ class ComposerController extends BaseController with DragDropFileMixin implement
     _subscriptionOnDragEnter = html.window.onDragEnter.listen((event) {
       event.preventDefault();
 
-      if (_validateFilesTransfer(event.dataTransfer.types)) {
+      if (event.dataTransfer.types.validateFilesTransfer) {
         mailboxDashBoardController.localFileDraggableAppState.value = DraggableAppState.active;
       }
     });
@@ -393,7 +393,7 @@ class ComposerController extends BaseController with DragDropFileMixin implement
     _subscriptionOnDragOver = html.window.onDragOver.listen((event) {
       event.preventDefault();
 
-      if (_validateFilesTransfer(event.dataTransfer.types)) {
+      if (event.dataTransfer.types.validateFilesTransfer) {
         mailboxDashBoardController.localFileDraggableAppState.value = DraggableAppState.active;
       }
     });
@@ -401,7 +401,7 @@ class ComposerController extends BaseController with DragDropFileMixin implement
     _subscriptionOnDragLeave = html.window.onDragLeave.listen((event) {
       event.preventDefault();
 
-      if (_validateFilesTransfer(event.dataTransfer.types)) {
+      if (event.dataTransfer.types.validateFilesTransfer) {
         mailboxDashBoardController.localFileDraggableAppState.value = DraggableAppState.inActive;
       }
     });
@@ -409,16 +409,12 @@ class ComposerController extends BaseController with DragDropFileMixin implement
     _subscriptionOnDrop = html.window.onDrop.listen((event) {
       event.preventDefault();
 
-      if (_validateFilesTransfer(event.dataTransfer.types)) {
+      if (event.dataTransfer.types.validateFilesTransfer) {
         mailboxDashBoardController.localFileDraggableAppState.value = DraggableAppState.inActive;
       }
     });
   }
 
-  bool _validateFilesTransfer(List<dynamic>? types) {
-    return types?.any((type) => type == 'Files') ?? false;
-  }
-
   Future<void> _saveComposerCacheOnWebAction() async {
     _autoCreateEmailTag();
 
@@ -2130,7 +2126,7 @@ class ComposerController extends BaseController with DragDropFileMixin implement
   }
 
   void handleOnDragEnterHtmlEditorWeb(List<dynamic>? types) {
-    if (_validateFilesTransfer(types)) {
+    if (types.validateFilesTransfer) {
       mailboxDashBoardController.localFileDraggableAppState.value = DraggableAppState.active;
     }
   }

lib/features/composer/presentation/widgets/web/local_file_drop_zone_widget.dart

@@ -14,6 +14,7 @@ class LocalFileDropZoneWidget extends StatelessWidget {
   final ImagePaths imagePaths;
   final double? width;
   final double? height;
+  final EdgeInsetsGeometry margin;
   final OnLocalFileDropZoneListener? onLocalFileDropZoneListener;
 
   const LocalFileDropZoneWidget({
@@ -21,6 +22,7 @@ class LocalFileDropZoneWidget extends StatelessWidget {
     required this.imagePaths,
     this.width,
     this.height,
+    this.margin = DropZoneWidgetStyle.margin,
     this.onLocalFileDropZoneListener
   });
 
@@ -32,7 +34,7 @@ class LocalFileDropZoneWidget extends StatelessWidget {
         width: width,
         height: height,
         child: Padding(
-          padding: DropZoneWidgetStyle.margin,
+          padding: margin,
           child: DottedBorder(
             borderType: BorderType.RRect,
             radius: const Radius.circular(DropZoneWidgetStyle.radius),
@@ -52,7 +54,7 @@ class LocalFileDropZoneWidget extends StatelessWidget {
               child: Column(
                 mainAxisSize: MainAxisSize.min,
                 children: [
-                  SvgPicture.asset(imagePaths.icDropZoneIcon),
+                  Flexible(child: SvgPicture.asset(imagePaths.icDropZoneIcon)),
                   const SizedBox(height: DropZoneWidgetStyle.space),
                   Text(
                     AppLocalizations.of(context).dropFileHereToAttachThem,