Skip CPU texture bake fallback: raw mesh passes to rigging instead

xatlas CPU bake takes 10+ min, causing ZeroGPU proxy token expiry.
On nvdiffrast failure just copy the raw TripoSG GLB — rigging/animation
don't require a UV-textured mesh. Texture can be improved later.

app.py

@@ -1186,10 +1186,11 @@ def apply_texture(glb_path, input_image, remove_background, variant, tex_seed,
             )
             print("[apply_texture] nvdiffrast texture baking succeeded.")
         except Exception as _nv_err:
-            # Fallback: CPU xatlas UV-unwrap + per-face numpy projection
+            # nvdiffrast unavailable on ZeroGPU (error 209); CPU xatlas bake
+            # too slow (~10+ min) for ZeroGPU proxy token lifetime. Use raw mesh.
             print(f"[apply_texture] nvdiffrast baking failed ({type(_nv_err).__name__}): {_nv_err}")
-            print("[apply_texture] Falling back to CPU xatlas texture bake...")
-            _bake_texture_cpu(glb_path, mv_views, out_glb, uv_size=512)
+            print("[apply_texture] Skipping texture bake — forwarding raw TripoSG mesh.")
+            shutil.copy(glb_path, out_glb)
 
         final_path = "/tmp/triposg_textured.glb"
         shutil.copy(out_glb, final_path)