Added the Model Comparison assistant for blind comparisons of two models (#1009)

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

app/MindWork AI Studio/Assistants/ModelComparison/ModelComparisonAnswerCard.razor.cs

@@ -0,0 +1,72 @@
+using AIStudio.Chat;
+using AIStudio.Components;
+
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Assistants.ModelComparison;
+
+/// <summary>
+/// The card of one answer of the Model Comparison assistant, with its title above.
+/// </summary>
+/// <remarks>
+/// The same markup for both answers of a run, so that nothing but the position tells them apart. The card fills the
+/// column of the grid it stands in; from the breakpoint md of MudBlazor on, both columns are in one row, so the cards
+/// are equally high however long the answers are. That is why the names of the models are not part of the card: how
+/// long a name is would make the cards differ, see ModelComparisonAnswerCaption. In a narrower window, the second card
+/// stands below the first one. The column itself belongs to the page, see ModelComparisonVoteColumns.
+/// </remarks>
+public partial class ModelComparisonAnswerCard : MSGComponentBase
+{
+    /// <summary>
+    /// Gets or sets the title: "Answer A" or "Answer B" while the user votes, "First model" or "Second model" in the
+    /// summary.
+    /// </summary>
+    [Parameter, EditorRequired]
+    public string Title { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the answer.
+    /// </summary>
+    [Parameter, EditorRequired]
+    public ModelComparisonAnswer Answer { get; set; } = null!;
+
+    /// <summary>
+    /// Gets or sets when the run ended. Both answers of a run show this one time: a time of their own would tell the
+    /// faster model from the slower one.
+    /// </summary>
+    [Parameter]
+    public DateTimeOffset Time { get; set; }
+
+    /// <summary>
+    /// Gets or sets the classes of the card, see ModelComparisonOutcome.CardClassOf.
+    /// </summary>
+    [Parameter]
+    public string CardClass { get; set; } = ModelComparisonOutcome.FILL_THE_COLUMN;
+
+    /// <summary>
+    /// The answer as the chat component wants it. Built once per answer, and not on every render: the chat component
+    /// compares what it is given to decide whether anything has to be drawn again, and a new one would make it parse the
+    /// whole Markdown again.
+    /// </summary>
+    private ContentText content = new();
+
+    /// <summary>
+    /// The answer which content was built from.
+    /// </summary>
+    private ModelComparisonAnswer? shownAnswer;
+
+    #region Overrides of ComponentBase
+
+    protected override void OnParametersSet()
+    {
+        if (!ReferenceEquals(this.shownAnswer, this.Answer))
+        {
+            this.shownAnswer = this.Answer;
+            this.content = new ContentText { Text = this.Answer.Text };
+        }
+
+        base.OnParametersSet();
+    }
+
+    #endregion
+}