Thumbnail strip: show hotkey label next to each scene name

Models/SceneCatalog.cs

@@ -1,7 +1,9 @@
 using System;
+using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
 using System.Windows.Data;
+using ytLive.Services;
 
 namespace ytLive.Models;
 
@@ -21,6 +23,16 @@ public static class SceneCatalog
 
     public static readonly string[] All = { Starting, Live, Brb, Chat, Ending };
 
+    /// <summary>Maps each canonical scene name to its hotkey action.</summary>
+    public static readonly IReadOnlyDictionary<string, HotkeyId> SceneHotkeys = new Dictionary<string, HotkeyId>(StringComparer.OrdinalIgnoreCase)
+    {
+        [Starting] = HotkeyId.SceneStarting,
+        [Live]     = HotkeyId.SceneLive,
+        [Brb]      = HotkeyId.SceneBrb,
+        [Chat]     = HotkeyId.SceneChat,
+        [Ending]   = HotkeyId.SceneEnding,
+    };
+
     private static readonly Dictionary<string, string> DisplayNames = new(StringComparer.OrdinalIgnoreCase)
     {
     };