Apply lesson cover as poster for embedded kinescopeVideo nodes

src/app/(student)/courses/[slug]/lessons/[lessonId]/page.tsx

@@ -122,9 +122,6 @@ export default async function LessonPage({ params }: Props) {
       {/* Title */}
       <h1 className="text-2xl font-bold mb-6 leading-snug">{lesson.title}</h1>
 
-      {/* DEBUG: remove after fix */}
-      <div style={{background:"red",color:"white",padding:"4px 8px",fontSize:12,marginBottom:8}}>DEBUG lessonId: {lessonId} | kinescopeId: {String(lesson.kinescopeId ?? "NULL")} | coverImage: {String(lesson.coverImage ?? "NULL")} | isAdmin: {String(isAdmin)}</div>
-
       {/* Video */}
       {lesson.kinescopeId && (
         <div className="mb-8">
@@ -135,7 +132,7 @@ export default async function LessonPage({ params }: Props) {
       {/* Text content */}
       {hasContent && (
         <div className="mb-8">
-          <LessonContent content={lesson.content as object} />
+          <LessonContent content={lesson.content as object} coverImage={lesson.coverImage} />
         </div>
       )}