Unify the drop zones into one component

app/MindWork AI Studio/Pages/Chat.razor

@@ -4,7 +4,7 @@
 
 @* The chat is a drop area: a file dropped anywhere in it hangs itself on the composer, which is
    what users are used to. *@
-<DropZoneScope Class="inner-scrolling-context">
+<PathDropZone IsArea="@true" Class="inner-scrolling-context">
     
     <MudStack Row="true" AlignItems="AlignItems.Center" Class="mb-2" StretchItems="StretchItems.Start">
         <MudText Typo="Typo.h3">
@@ -168,4 +168,4 @@
             </MudDrawerContainer>
         </MudDrawer>
     }
-</DropZoneScope>
+</PathDropZone>