Surface, before generation, which refinement key(s) each scene will steer
with — exactly matching the generation-time resolution.
- conditioning.py: extract resolve_scene_refinement_keys() as the single
source of truth; FunPackVideoRefinerV2._v2_scene_refinement_keys now
delegates to it (no behavior change).
- bridge.scene_refinement_keys(): preview payload per scene — explicit
non-default keys, or the project default key when none fired.
- server /preview: attach scene_refinement_keys (both gen and non-gen
branches), resolved against the project's refinement_key.
- inspector.js + styles.css: per-scene key chip in the timeline preview
(avg when >1; greyed "(default)" fallback).
- tests: resolver/Studio parity + bridge preview payload.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
