chore: merge master → dev/video-fer (live camera FER mode)

fix: route video files through async polling to restore FER display

chore: merge master → dev/video-fer (SSE transcribe-stream)

fix: pin onnxruntime==1.24.2 + cache-bust Dockerfile for FER

fix: async job polling for timeout + FER ONNX ort>=1.19.0

chore: merge master + streaming emotions, inline badges, hidden scrollbar

feat: streaming valence/arousal + inline bracket badges + hidden scrollbar

feat: char-level text highlight + click-to-seek + inline bracket badges

feat: ElevenLabs-style transcript highlight + timeline playhead

feat: bidirectional timeline ↔ transcript sync with scroll highlight

fix: remove play/pause overlay from RightPanel video preview

feat: per-second FER timeline for live emotion panel

feat: add delete button to recent sessions in sidebar

fix: prevent double API call on upload; replace frontend with redesigned UI

feat: replace frontend with redesigned Ethos Studio UI + update READMEs

refactor: restructure repo into api/ proxy/ web/ training/ docs/