Refactor ShowAudience handling across the application to align with MPAA rating system. Update ShowAudience enum to reflect new ratings (G, PG, PG-13, R, NC-17) and adjust related data models, API types, and frontend components to support nullable audience values. Enhance metadata handling to incorporate content ratings from external sources, ensuring proper audience filtering in scheduling logic. Update documentation to clarify changes in audience categorization and its implications for content management.

frontend/src/shared/lib/locales/en.ts

@@ -108,7 +108,8 @@ export const en = {
         genres: 'Genres',
         genresHint: 'Any of the checked ones.',
         maxAudience: 'No stricter than',
-        audienceHint: 'Categories are ordered by strictness: kids → family → … → adult.',
+        audienceHint:
+        'Ratings are ordered by strictness: G → PG → PG-13 → R → NC-17. Unrated shows stay in the selection.',
         year: 'Year',
         unitMinutes: 'Unit runtime, min',
         unitMinutesHint:
@@ -294,13 +295,14 @@ export const en = {
       originalName: 'Original name (eng)',
       kind: 'Kind',
       kinds: { Series: 'Series', Single: 'Movie', Interstitial: 'Clip' },
-      audience: 'Category',
+      audience: 'Rating',
+      audienceUnset: 'Not rated',
       audiences: {
-        Kids: 'Kids',
-        Family: 'Family',
-        Teen: 'Teen',
-        General: 'General',
-        Adult: 'Adult',
+        G: 'G — general audiences',
+        PG: 'PG — parental guidance',
+        'PG-13': 'PG-13 — over 13',
+        R: 'R — under 17 with adult',
+        'NC-17': 'NC-17 — adults only',
       },
       seasons: 'Seasons',
       loadedSeasons: 'Loaded seasons',