Normalize Comment Terminology

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

UI/DebugMonitorUI.cs

@@ -14,7 +14,7 @@ namespace ADOFAIRenderer.UI;
 /// <para>
 /// Created by <c>RenderManager.StartFFmpegThread</c> on a GameObject kept across scene loads, and reused for later
 /// renders. The overlay is drawn on the game screen only; it is not part of the encoded video frames.
-/// <see cref="Update"/> rebuilds the text every frame on the Unity main thread.
+/// <see cref="Update"/> rebuilds the text every frame on the main Unity thread.
 /// </para>
 /// </summary>
 internal class DebugMonitorUI : MonoBehaviour
@@ -194,7 +194,7 @@ internal class DebugMonitorUI : MonoBehaviour
         //   Queue            - frames waiting in ImageQueue for the render thread / queue frame limit
         //   Rendered Frames  - RenderManager.frameCount (frames produced by the game)
         //   Frames Sent      - RenderManager.framesSent (frames handed to the encoder; written by the render thread)
-        //   Throttling       - RenderManager.throttleCount (times the main thread started waiting because ImageQueue
+        //   Throttling       - RenderManager.throttleCount (times the main Unity thread started waiting because ImageQueue
         //                      held more frames than its limit)
         //   Readback failures- RenderManager.readbackFailureCount (AsyncGPUReadback requests that completed with an error)
         //   Mono heap        - GC.GetTotalMemory(false), managed heap size in MiB without forcing a collection