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/Dialogs/Settings/SettingsDialogModelComparison.razor.cs

@@ -0,0 +1,82 @@
+using AIStudio.Assistants.ModelComparison;
+using AIStudio.Settings;
+
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Dialogs.Settings;
+
+public partial class SettingsDialogModelComparison : SettingsDialogBase
+{
+    [Inject]
+    private ModelComparisonStore ModelComparisonStore { get; init; } = null!;
+
+    [Inject]
+    private ILogger<SettingsDialogModelComparison> Logger { get; init; } = null!;
+
+    /// <summary>
+    /// The presets of the mode Answer Variance, as the store listed them when the dialog opened.
+    /// </summary>
+    private IReadOnlyList<ModelComparisonPreset> presets = [];
+
+    /// <summary>
+    /// Whether the presets were listed. Until then, a preselected preset does not count as missing.
+    /// </summary>
+    private bool presetsListed;
+
+    private bool OptionsDisabled() => !this.SettingsManager.ConfigurationData.ModelComparison.PreselectOptions;
+
+    #region Overrides of SettingsDialogBase
+
+    /// <inheritdoc />
+    protected override async Task OnInitializedAsync()
+    {
+        await base.OnInitializedAsync();
+
+        try
+        {
+            this.presets = await this.ModelComparisonStore.ListPresetsAsync();
+            this.presetsListed = true;
+        }
+        catch (Exception exception) when (exception is IOException or UnauthorizedAccessException)
+        {
+            this.Logger.LogWarning(exception, "Could not list the presets of the Model Comparison assistant.");
+        }
+    }
+
+    #endregion
+
+    /// <summary>
+    /// Gets the entries of the preset selection: none, every preset, and the preselected one when it no longer exists.
+    /// </summary>
+    private IReadOnlyList<ConfigurationSelectData<string>> PresetData
+    {
+        get
+        {
+            var selectedPresetId = this.SettingsManager.ConfigurationData.ModelComparison.PreselectedPresetId;
+            List<ConfigurationSelectData<string>> entries =
+            [
+                new(T("No preset preselected"), string.Empty),
+                .. this.presets.Select(preset => new ConfigurationSelectData<string>(preset.Name, preset.Id.ToString("D")))
+            ];
+
+            if (this.SelectedPresetMissing)
+                entries.Add(new(string.Format(T("Missing preset ({0})"), selectedPresetId), selectedPresetId));
+
+            return entries;
+        }
+    }
+
+    /// <summary>
+    /// Gets whether the preselected preset was deleted since.
+    /// </summary>
+    private bool SelectedPresetMissing
+    {
+        get
+        {
+            var selectedPresetId = this.SettingsManager.ConfigurationData.ModelComparison.PreselectedPresetId;
+            return this.presetsListed
+                   && !string.IsNullOrWhiteSpace(selectedPresetId)
+                   && this.presets.All(preset => !string.Equals(preset.Id.ToString("D"), selectedPresetId, StringComparison.OrdinalIgnoreCase));
+        }
+    }
+}