Fix Random Mix audiobook exclusion: click area and false matches (#973)

* fix(random-mix): limit exclusion toggle click area to checkbox and title

The audiobook exclusion was a full-width label wrapping the checkbox,
title and description, so clicking empty space or the description text
toggled it. Make only the checkbox and its title clickable; the
description and surrounding space are no longer hit targets.

* fix(random-mix): stop excluding Thriller and Fantasy as audiobook genres

These keywords match regular music (e.g. Trance/Metal genre tags, a track
titled "Thriller") because the exclusion checks genre, title, album and
artist by substring, dropping a few legit songs per mix. Remove both from
the audiobook keyword list.

* docs(changelog): random mix audiobook exclusion fixes (#973)

src/utils/componentHelpers/randomMixHelpers.ts

@@ -4,8 +4,8 @@ import { passesMixMinRatings, type MixMinRatingsConfig } from '../mix/mixRatingF
 export const AUDIOBOOK_GENRES = [
   'hörbuch', 'hoerbuch', 'hörspiel', 'hoerspiel',
   'audiobook', 'audio book', 'spoken word', 'spokenword',
-  'podcast', 'kapitel', 'thriller', 'krimi', 'speech',
-  'fantasy', 'comedy', 'literature',
+  'podcast', 'kapitel', 'krimi', 'speech',
+  'comedy', 'literature',
 ];
 
 export function formatRandomMixDuration(seconds: number): string {