fix(3d): restore correct orientation in test_3d_render (direct-to-surface)

Add Renderer3D::set_direct_render(bool) flag (must be set before init()).
When true, uses standard CCW winding and un-negates perspective Y, restoring
the pre-ba7ea27 orientation for direct-to-surface rendering where the
post-process Y-flip is absent.

handoff(Gemini): set_direct_render() is the escape hatch for any future
renderer usage that bypasses the post-process chain.

0 files changed, 0 insertions, 0 deletions