Method update_frame_uniforms

native/shared/src/renderer/material_system.rs:676–684

Write the per-frame + per-view UBOs. Safe to call any time before `dispatch`; callers should call exactly once per frame to keep `PerFrame.time` accurate. Does NOT clear the commands list — that's `reset_frame`'s job (called at begin_frame, not end_frame, so draws submitted during the frame survive).

(
        &mut self,
        queue: &wgpu::Queue,
        per_frame: &PerFrameUniforms,
        per_view:  &PerViewUniforms,
    )

    /// list — that's `reset_frame`'s job (called at begin_frame, not
    /// end_frame, so draws submitted during the frame survive).
    pub fn update_frame_uniforms(
        &mut self,
        queue: &wgpu::Queue,
        per_frame: &PerFrameUniforms,
        per_view:  &PerViewUniforms,
    ) {
        queue.write_buffer(&self.per_frame_buffer, 0, bytemuck::bytes_of(per_frame));
        queue.write_buffer(&self.per_view_buffer,  0, bytemuck::bytes_of(per_view));
    }

    /// Reset the per-draw slot cursor. Commands lists are cleared by
    /// the Renderer from its own `begin_frame` so the order of reset