Allow assistants to run in the background (#828)

app/MindWork AI Studio/Tools/AssistantSessions/AssistantSessionStateKey.cs

@@ -0,0 +1,28 @@
+namespace AIStudio.Tools.AssistantSessions;
+
+/// <summary>
+/// Identifies a typed assistant session state value.
+/// </summary>
+/// <typeparam name="T">The value type stored for this key.</typeparam>
+public readonly record struct AssistantSessionStateKey<T>
+{
+    /// <summary>
+    /// Initializes a new assistant session state key.
+    /// </summary>
+    /// <param name="name">The stable dictionary name used in assistant session snapshots.</param>
+    public AssistantSessionStateKey(string name)
+    {
+        this.Name = name;
+    }
+
+    /// <summary>
+    /// Gets the stable dictionary name used in assistant session snapshots.
+    /// </summary>
+    public string Name { get; }
+
+    /// <summary>
+    /// Returns the stable dictionary name.
+    /// </summary>
+    /// <returns>The stable dictionary name.</returns>
+    public override string ToString() => this.Name;
+}