User feedback: subtitles have been causing problems (wrong text from STT,
chorus selection issues). Better to default to clean reels without
burned-in subtitles - just video + audio at the chorus moment.
Changes:
- 'Brez podnapisov' checkbox now CHECKED by default
- Removed 'Stil podnapisov' dropdown from UI (kept hidden for compat)
- Updated step label: 'Reframe v 9:16 + podnapisi' → 'Reframe v 9:16'
- Backend already supports --no-subs flag, no logic changes needed
Result: reels are simpler and more reliable. Just clean 9:16 with audio.
User can enable subtitles per-job by unchecking the box if needed.