GUI fields now trim leading and trailing whitespace:

cmd/mxl-player/video_visibility.go

@@ -0,0 +1,30 @@
+package main
+
+import "mxl-player/internal/playback"
+
+func desiredVideoFeed(
+	snapshot playback.SessionSnapshot,
+	available bool,
+) playback.FeedConfig {
+	if !available {
+		return playback.FeedConfig{}
+	}
+	switch snapshot.Plan.Topology {
+	case playback.TopologyIndependent:
+		if snapshot.Plan.Video.Active {
+			return snapshot.Plan.Video
+		}
+	case playback.TopologySynchronized:
+		if snapshot.Plan.Sync.Active() {
+			return snapshot.Plan.Sync.Video
+		}
+	}
+	return playback.FeedConfig{}
+}
+
+func shouldShowVideo(
+	desired playback.FeedConfig,
+	delivered playback.FeedConfig,
+) bool {
+	return desired.Active && sameVideoSource(desired, delivered)
+}