feat: Add animated home button to view cube to reset camera

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

src/ViewCube.h

@@ -9,6 +9,8 @@
 
 class QOpenGLShaderProgram;
 class QOpenGLTexture;
+class QPainter;
+class QSvgRenderer;
 
 class ViewCube : protected QOpenGLFunctions
 {
@@ -18,6 +20,8 @@ public:
 
     void initializeGL();
     void paintGL(QOpenGLShaderProgram* simpleShader, int simpleShaderColorLoc, const QMatrix4x4& viewMatrix, int width, int height, const QPoint& mousePos);
+    void paint2D(QPainter& painter, int widgetWidth, int widgetHeight);
+    bool handleMousePress(const QPoint& pos, int widgetWidth, int widgetHeight);
 
 private:
     void createFaceTextures();
@@ -26,6 +30,10 @@ private:
     void drawViewCube(const QMatrix4x4& projection, const QMatrix4x4& view, float opacity);
     void drawAxes(QOpenGLShaderProgram* simpleShader, int colorLoc, const QMatrix4x4& projection, const QMatrix4x4& view);
 
+    bool m_isHovered = false;
+    QRect m_homeButtonRect;
+    QSvgRenderer* m_homeButtonRenderer = nullptr;
+
     QOpenGLTexture* m_faceTextures[6];
 
     QOpenGLShaderProgram* m_textureShaderProgram = nullptr;