Set figure size and remove expand in 3D plot test

Specifies the figure size in the 3D plot test and removes the 'expand=True' argument from MatplotlibChartWithToolbar for consistency and improved layout control.

Author: FeodorFitsner

tests/mpl_v2_3d.py

@@ -22,15 +22,15 @@ def main(page: ft.Page):
     y2 = np.sin(theta + np.pi)
     z2 = z1
 
-    # Plot
-    fig, ax = plt.subplots(subplot_kw={"projection": "3d"})
+    # Plot with defined figure size
+    fig, ax = plt.subplots(subplot_kw={"projection": "3d"}, figsize=(8, 6))
     ax.fill_between(x1, y1, z1, x2, y2, z2, alpha=0.5)
     ax.plot(x1, y1, z1, linewidth=2, color="C0")
     ax.plot(x2, y2, z2, linewidth=2, color="C0")
 
     ax.set(xticklabels=[], yticklabels=[], zticklabels=[])
 
-    page.add(flet_charts.MatplotlibChartWithToolbar(figure=fig, expand=True))
+    page.add(flet_charts.MatplotlibChartWithToolbar(figure=fig))
 
 
 ft.run(main)