v0.3.0 — content-aware Insta360 + GUI launcher + codex round-1 fixes

Content-aware Insta360 reveals + GUI wrapper. v0.2 hardcoded yaw targets,
so reveals had a coin-flip chance of pointing at the DJ booth versus a wall.
v0.3 scores Insta360 ERP footage frame-by-frame for motion + brightness and
points camera moves at the actual content.

Added

• bin/score-360.py — content-aware Insta360 yaw scoring. Samples
  source frames at 1 fps in grayscale, slices into 8 horizontal yaw segments
  (45° each), and emits per-segment motion + brightness scores to
  sphere_score.json. Single-pipe ffmpeg → numpy, near-constant memory.
• lib/sphere.py:best_yaw_at — pure helper that queries sphere_score
  at a given source-local time and returns the yaw with highest weighted
  motion + brightness. Returns None on all-zero windows so callers fall
  back to move defaults. ERP-circular smoothing pools seam-adjacent
  segments so subjects straddling 337.5/22.5° aren't dropped.
• start_yaw parameter on orbit, crowd_reveal, bpm_sync_orbit,
  breakdown_drift — content-aware anchoring. Default start_yaw=0
  preserves v0.2 behavior byte-identically.
• start_yaw + shortest-path delta on drop_impact — a target yaw of
  337.5° now whips -22.5° (the short way) instead of spinning 337.5°.
• Enhanced dj-edit-mac.command with launch menu (New / Re-edit recent /
  Quick test / Demo / Doctor), style picker (signature / aggressive / clean),
  reference picker (anyma / fisher / rinse), and a "quick test" mode that
  renders only the highest-intensity drop (~3 min) before committing to a
  full 30-50 min render. Recent projects saved at ~/.dj-edit-recent.
• dj-edit score-360 subcommand (placeholder shipped in v0.2.1, now backed
  by real implementation).

Fixed — codex round 1 (HIGH severity)

• build-edl.py was querying sphere_score with master-timeline time but
  frames are source-local. Multi-Insta360 setups also always read
  source_index=0. Now passes source_t=src_in and
  source_path=finfo["path"] so each clip resolves to its own source at the
  right time.
• drop_impact whipped the long way around when target_yaw > 180°.
  Now computes a signed shortest-path delta in [-180, 180] and animates
  start_yaw + delta * progress.

Fixed — codex round 1 (MEDIUM severity)

• score-360.py stderr=PIPE could deadlock on long sources where ffmpeg
  emits decode warnings faster than Python reads stdout. Switched to
  DEVNULL and added -nostdin -hide_banner -nostats.
• sphere.best_yaw_at returned arbitrary yaw=22.5° on all-zero/black
  windows. Now returns None and the caller falls back to the move's
  default yaw.
• score-360.py now emits source_path (project-relative) alongside
  basename, so multi-source matching in build-edl.py works.

Upgrade

brew upgrade dj-edit