Added an introduction and an onboarding chat to the BeyondFacts Lab (#1178)

app/MindWork AI Studio/Assistants/BeyondFactsLab/BflOnboarding.razor.cs

@@ -0,0 +1,45 @@
+using AIStudio.Components;
+using AIStudio.Provider;
+
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// The conversation in which the BeyondFacts Lab tells whether it fits a task and how to work with it.
+/// </summary>
+/// <remarks>
+/// It belongs to no preparation, so it has a provider of its own. The person may describe an unpublished task here,
+/// so the lab offers the same providers as for a preparation; but its prompt leaves out the guide, so any model may
+/// answer.
+/// </remarks>
+public partial class BflOnboarding : MSGComponentBase
+{
+    [Inject]
+    private BflConversationService ConversationService { get; init; } = null!;
+
+    /// <summary>
+    /// The provider which answers.
+    /// </summary>
+    private AIStudio.Settings.Provider providerSettings = Settings.Provider.NONE;
+
+    /// <inheritdoc />
+    protected override async Task OnInitializedAsync()
+    {
+        await base.OnInitializedAsync();
+
+        // The provider which answered last, as long as its confidence is still high enough, otherwise the preselected one:
+        var conversation = await this.ConversationService.GetAsync(BflOnboardingThreadLocation.INSTANCE);
+        this.providerSettings = this.SettingsManager.GetPreselectedProvider(Tools.Components.BEYOND_FACTS_LAB_ASSISTANT, conversation.Thread?.SelectedProvider);
+    }
+
+    /// <summary>
+    /// Checks whether a provider can run the conversation.
+    /// </summary>
+    /// <remarks>
+    /// The confidence is checked before: the selection offers only providers whose confidence is high enough.
+    /// </remarks>
+    /// <param name="provider">The provider.</param>
+    /// <returns>Why the provider cannot run the conversation, or null when it can.</returns>
+    private string? ValidateProvider(AIStudio.Settings.Provider provider) => provider.UsedLLMProvider is LLMProviders.NONE ? TA("Please select a provider.") : null;
+}