v1.5.6

Added Knox Audio Endpoints

• Music
• TTS
• STT

Fixed

• Agent audio-card Play seeks the clip on the timeline and uses KnoxStudio playback (same as video cards), instead of opening the MP3 in the system player
• Asking the Manager to add captions/subtitles or transcribe an existing video now goes to the Editor STT path (caption_clip) instead of generate_video

Changed

• Caption cues use larger bold type on a compact bottom-center pill (shrink-wrapped to the words) instead of a full-width bar with small text