[backfill, May 19] Project scaffold and rendering pipeline. raylib 5.5 + AobaAPI vendored, CMake FetchContent build. Window opens, cube creates, flat-shaded 3D pass with glPolygonOffset. Wireframe evolved through four iterations: raw DrawLine3D → 2D overlay projection → painter-sort back-to-front → NanoVG anti-aliased gradient lines with round caps. Depth-gradient wireframe (front color fades to transparent at back) is the final form. 4x MSAA enabled. Warm brown/rust palette established in StyleState.