Added the Batch Processing Assistant (#901)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Assistants/AssistantBase.razor.cs

@@ -180,6 +180,7 @@ public abstract partial class AssistantBase<TSettings> : AssistantLowerBase wher
         this.ProviderSettings = this.SettingsManager.GetPreselectedProvider(this.Component);
         this.CurrentProfile = this.SettingsManager.GetPreselectedProfile(this.Component);
         this.CurrentChatTemplate = this.SettingsManager.GetPreselectedChatTemplate(this.Component);
+        await this.OnDefaultsAppliedAsync();
         this.assistantSessionKey = new(this.Component, this.AssistantSessionInstanceId);
         await this.AttachAssistantSessionIfAvailable();
         await this.ConsumeMediaOutcomeAsync();
@@ -311,6 +312,11 @@ public abstract partial class AssistantBase<TSettings> : AssistantLowerBase wher
     /// the user has stopped typing or selecting options.
     /// </remarks>
     protected virtual Task OnFormChange() => Task.CompletedTask;
+
+    /// <summary>
+    /// Allows assistants to finish asynchronous work after their configured defaults were applied.
+    /// </summary>
+    protected virtual Task OnDefaultsAppliedAsync() => Task.CompletedTask;
     
     /// <summary>
     /// Add an issue to the UI.
@@ -519,10 +525,18 @@ public abstract partial class AssistantBase<TSettings> : AssistantLowerBase wher
         });
     }
     
-    private async Task CancelStreaming()
-    {
-        await this.AssistantSessionService.CancelAsync(this.assistantSessionKey, this);
-    }
+    private Task CancelStreaming() => this.CancelAssistantSessionAsync();
+
+    /// <summary>
+    /// Requests cancellation of the active assistant session.
+    /// </summary>
+    /// <remarks>
+    /// Derived assistants should use this method instead of accessing their local
+    /// cancellation token source. A component which reattaches after navigation
+    /// does not own that source, while the session service still does.
+    /// </remarks>
+    /// <returns>A task that completes after cancellation was requested.</returns>
+    protected Task CancelAssistantSessionAsync() => this.AssistantSessionService.CancelAsync(this.assistantSessionKey, this);
     
     protected async Task CopyToClipboard()
     {
@@ -668,6 +682,7 @@ public abstract partial class AssistantBase<TSettings> : AssistantLowerBase wher
         
         this.ResetForm();
         this.ResetProviderAndProfileSelection();
+        await this.OnDefaultsAppliedAsync();
         
         this.InputIsValid = false;
         this.InputIssues = [];
@@ -756,7 +771,7 @@ public abstract partial class AssistantBase<TSettings> : AssistantLowerBase wher
     /// Stores the current assistant UI and chat state in the active assistant session.
     /// </summary>
     /// <returns>A task that completes after the checkpoint was stored and published.</returns>
-    private Task CheckpointAssistantSession()
+    protected Task CheckpointAssistantSession()
     {
         if (this.assistantSessionId is null)
             return Task.CompletedTask;
@@ -854,7 +869,7 @@ public abstract partial class AssistantBase<TSettings> : AssistantLowerBase wher
     /// Refreshes the component when it is still mounted.
     /// </summary>
     /// <returns>A task that completes after the renderer was notified.</returns>
-    private async Task RefreshAssistantUIAsync()
+    protected async Task RefreshAssistantUIAsync()
     {
         if (this.isDisposed)
             return;