feat: richer profile stats, wrapup min-count filter, watch medium distribution

- filter wrapup top directors/actors with count < 2
- add watch_medium to wrapup report + adapters
- profile trends: genre breakdown, rating histogram, watch medium dist
- fix unused StarDisplay import in movie detail

spa/src/features/wrapup.ts

@@ -99,6 +99,7 @@ export type WrapUpReport = {
   lowest_rated_movie?: MovieRef
   first_movie_of_period?: MovieRef
   last_movie_of_period?: MovieRef
+  watch_medium_distribution: { medium: string; count: number }[]
   poster_paths: string[]
   top_cast_profile_paths: string[]
 }