Reset and keep the web content URL in dynamic assistants

app/MindWork AI Studio/Assistants/Dynamic/AssistantDynamic.razor

@@ -140,6 +140,7 @@ else
                     var webState = this.assistantState.WebContent[webContent.Name];
                     <div class="@webContent.Class" style="@GetOptionalStyle(webContent.Style)">
                         <ReadWebContent @bind-Content="@webState.Content"
+                                        @bind-URL="@webState.URL"
                                         ProviderSettings="@this.ProviderSettings"
                                         @bind-AgentIsRunning="@webState.AgentIsRunning"
                                         @bind-Preselect="@webState.Preselect"

app/MindWork AI Studio/Assistants/Dynamic/WebContentState.cs

@@ -3,7 +3,8 @@ namespace AIStudio.Assistants.Dynamic;
 public sealed class WebContentState
 {
     public string Content { get; set; } = string.Empty;
+    public string URL { get; set; } = string.Empty;
     public bool Preselect { get; set; }
     public bool PreselectContentCleanerAgent { get; set; }
     public bool AgentIsRunning { get; set; }
-}
+}