`useResizeHandler` does not respond to container layout changes

Currently, useResizeHandler only responds to window.resize events.

This works when the browser viewport changes, but it does not cover layout changes that resize the plot without resizing the window.

For example, if a page contains a collapsible sidebar and a responsive plot in the same page, toggling the sidebar changes the space available to the plot, but no window.resize event is fired. The plot therefore keeps its previous size until Plotly.Plots.resize() is called manually.

Would it make sense for useResizeHandler to react to changes in the rendered plot element's size instead of only listening to window.resize?

One possible approach would be to use ResizeObserver when available, while keeping the existing window.resize listener as a fallback.

Commencez par l’implémentation de useResizeHandler et suivez la manière dont elle s’abonne actuellement à window.resize. Examinez les tests existants concernant la gestion du redimensionnement, puis vérifiez que les modifications apportées à l’élément de plot rendu déclenchent le redimensionnement, tout en maintenant le fonctionnement du fallback de window.resize. Le travail est terminé lorsque les modifications d’un layout repliable redimensionnent le plot sans appel manuel à Plotly.Plots.resize().