The composition the Lesson Page renders. Receives the resolved View
from findLessonForView and the Server Action that completes a lesson.
Dispatches on lesson.kind so video and reading lessons render
appropriately (video → PlaybackPositionedVideoPlayer; reading → body).
The composition the Lesson Page renders. Receives the resolved
ViewfromfindLessonForViewand the Server Action that completes a lesson. Dispatches onlesson.kindso video and reading lessons render appropriately (video → PlaybackPositionedVideoPlayer; reading → body).