feat: Implement admin background task management and configurable media block transcript visibility.

web/experience/src/app/courses/[id]/lessons/[lessonId]/page.tsx

@@ -58,7 +58,8 @@ export default function LessonPlayerPage({ params }: { params: { id: string, les
     const prevLesson = allLessons[currentIndex - 1];
     const nextLesson = allLessons[currentIndex + 1];
 
-    const hasTranscription = lesson.transcription && lesson.transcription.cues && lesson.transcription.cues.length > 0;
+    const hasTranscription = lesson.transcription && lesson.transcription.cues && lesson.transcription.cues.length > 0 &&
+        !(lesson.metadata?.blocks || []).some(b => b.type === 'media' && b.config?.show_transcript === false);
 
     const handleSeek = (time: number) => {
         const videoElement = document.querySelector('video');

web/experience/src/components/blocks/QuizPlayer.tsx

@@ -62,7 +62,7 @@ export default function QuizPlayer({ id, title, quizData, allowRetry = true, max
     };
 
     return (
-        <div className="space-y-8" id={id}>
+        <div className="space-y-8 notranslate" id={id} translate="no">
             <div className="space-y-2">
                 <h3 className="text-xl font-bold border-l-4 border-blue-500 pl-4 py-1 tracking-tight text-white uppercase tracking-widest text-[10px]">
                     {title || "Knowledge Check"}