Move fallback and PView world drawing, shared alpha, particles, visibility, selection, and diagnostics behind focused frame owners. Make exceptional frames failure-atomic by restoring the shared GL baseline and preserving primary alpha failures through cleanup.
Co-authored-by: Codex <codex@openai.com>
Move camera/root resolution, live settings and listener preview, sky/lighting/fog preparation, animated classification, and building visibility scratch behind a typed WorldRenderFrameBuilder while preserving retail frame order and borrowed lifetimes.
Co-authored-by: Codex <codex@openai.com>
