Refactor message scrolling and cleanup Error.razor

Moved message scrolling logic to OnAfterRenderAsync to ensure DOM updates before scrolling, using Task.Yield() after StateHasChanged. Removed redundant EnsureMessageIsVisibleAsync calls. Cleaned up Error.razor by removing unused usings and the rendermode directive.

SqlDatabaseVectorSearch/Components/Pages/Ask.razor

@@ -141,6 +141,12 @@
 
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
+        // Scrolling here guarantees the browser DOM already contains the latest messages.
+        if (messages.Count > 0)
+        {
+            await EnsureMessageIsVisibleAsync();
+        }
+
         if (!firstRender)
         {
             return;
@@ -179,9 +185,7 @@
 
         question = null;
         await InvokeAsync(StateHasChanged);
-
+        await Task.Yield();
-        await EnsureMessageIsVisibleAsync();
-
         try
         {
             await using var scope = ServiceScopeFactory.CreateAsyncScope();
@@ -208,7 +212,6 @@
                 }
 
                 await InvokeAsync(StateHasChanged);
-
                 await EnsureMessageIsVisibleAsync();
             }
         }
@@ -221,8 +224,6 @@
         {
             isAsking = false;
             await InvokeAsync(StateHasChanged);
-
-            await EnsureMessageIsVisibleAsync();
         }
     }
 

SqlDatabaseVectorSearch/Components/Pages/Error.razor

@@ -1,6 +1,4 @@
 @page "/Error"
-@using System.Diagnostics
-@rendermode @(new InteractiveServerRenderMode(prerender: false))
 
 <div class="d-flex align-items-center justify-content-center">
     <div class="text-center">