Added the visual briefing assistant (#893)

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingSlotRole.cs

@@ -0,0 +1,46 @@
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Assistants.VisualBriefing;
+
+/// <summary>
+/// Identifies the semantic purpose of one content slot.
+/// </summary>
+[JsonConverter(typeof(JsonStringEnumConverter<VisualBriefingSlotRole>))]
+public enum VisualBriefingSlotRole
+{
+    /// <summary>Provides a short contextual label above a title.</summary>
+    EYEBROW,
+    
+    /// <summary>Provides a heading.</summary>
+    TITLE,
+    
+    /// <summary>Provides a concise synopsis.</summary>
+    SUMMARY,
+    
+    /// <summary>Provides primary narrative copy.</summary>
+    BODY,
+    
+    /// <summary>Names a value, control, or panel.</summary>
+    LABEL,
+    
+    /// <summary>Provides a highlighted value.</summary>
+    VALUE,
+    
+    /// <summary>Explains or qualifies a value.</summary>
+    CONTEXT,
+    
+    /// <summary>Provides a caption for a visual or table.</summary>
+    CAPTION,
+    
+    /// <summary>Provides the structured rows and columns of a table.</summary>
+    TABLE_DATA,
+    
+    /// <summary>Provides content for one interactive panel.</summary>
+    PANEL,
+    
+    /// <summary>Provides a calculated simulation result.</summary>
+    RESULT,
+
+    /// <summary>Provides the ordered entries of a chronological timeline.</summary>
+    TIMELINE_DATA,
+}