fix: only switch quality during active playback, not after video ended

src/App.vue

@@ -114,10 +114,14 @@ watch([() => store.qteTimeRelax, () => store.qteSingleKey], () => {
 watch(() => store.preferredQuality, (q) => {
   engine.videoManager.streamingQuality = q
   const scene = store.currentScene
-  if (scene?.streamingUrl && q) {
-    const url = engine.videoManager.resolveVideoUrl(scene, q)
-    const ct = engine.videoManager.getCurrentTime()
-    engine.videoManager.switchQuality(url, ct)
+  if (scene?.streamingUrl && scene.streamingUrl[q]) {
+    const active = engine.videoManager.getActiveVideoElement()
+    if (active && !active.ended) {
+      engine.videoManager.switchQuality(
+        engine.videoManager.resolveVideoUrl(scene, q),
+        engine.videoManager.getCurrentTime()
+      )
+    }
   }
 }, { immediate: true })