fix(3d): Correct debug box transforms and restore object textures

- Updated VisualDebug to accept mat4 transforms, enabling wireframes to follow rotating objects.
- Restored SDF bump mapping and floor grid texture in the fragment shader.
- Added vec4::xyz() helper to mini_math.h.
- Fixed Renderer3D to pass the full model matrix for debug visualization.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/util/mini_math.h b/src/util/mini_math.h
index dc88ad4..56e6832 100644
--- a/src/util/mini_math.h
+++ b/src/util/mini_math.h
@@ -129,6 +129,10 @@ struct vec4 {
       : x(x), y(y), z(z), w(w) {
   }
   VEC_OPERATORS(vec4, 4)
+
+  vec3 xyz() const {
+    return {x, y, z};
+  }
 };
 #endif /* defined(USE_VEC4) */