fix: fix issue #3, redraw and center the two pie charts

[mameikagou]

#3

[SeanHai]

Shows the comparison effect before and after repair

[mameikagou]

Before: when zooming in the page, the two pie charts will maintain their origin size and will not be centred;

After fixing it, the two pie charts will be redrawn to contain the new size and be centred in the center of the container;