fix: Correct face generation and resolve tool preview glitches

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

src/SketchFeature.cpp

@@ -112,7 +112,7 @@ void SketchFeature::buildShape()
                 TopoDS_Edge edge = makeEdge.Edge();
                 BRepBuilderAPI_MakeWire wireBuilder(edge);
                 if(wireBuilder.IsDone()) {
-                    BRepBuilderAPI_MakeFace faceBuilder(wireBuilder.Wire());
+                    BRepBuilderAPI_MakeFace faceBuilder(sketchPlane, wireBuilder.Wire());
                     if (faceBuilder.IsDone()) {
                         faces.append(faceBuilder.Face());
                     }

src/ViewportWidget.cpp

@@ -732,6 +732,7 @@ void ViewportWidget::drawSketch(const SketchFeature* sketch)
             glDrawArrays(GL_TRIANGLES, 0, faceData.size() / 6);
             m_litShaderProgram->disableAttributeArray(1);
             m_shaderProgram->bind(); // rebind simple shader for subsequent draws
+            m_shaderProgram->setAttributeBuffer(0, GL_FLOAT, 0, 3, 0);
         }
         glEnable(GL_CULL_FACE);
     }