`beforeInvalidate` and `afterInvalidate` events

Describe the problem

I have a progress bar at the top of my site that appears upon every navigation that happens client-side (much like the one in kit.svelte.dev). I'm using the beforeNavigate and afterNavigate events to show and then hide the progress bar.

Occasionally I need to call invalidate() to re-run all the load functions (because the authentication status has changed, for example). I would like to show the same loader when the load functions are re-running as well — because when you think about it, running invalidate() is kind of life refreshing the page.

Describe the proposed solution

It would be nice if SvelteKIt provided two other lifecycle functions called beforeInvalidate and afterInvalidate or something along those lines.

Alternatives considered

No response

Importance

nice to have

Additional Information

No response

Start by reading SvelteKit's existing beforeNavigate, afterNavigate, and invalidate lifecycle behavior to understand where the proposed hooks would fit. Define what beforeInvalidate and afterInvalidate should observe and when they should run, then add coverage showing the hooks around invalidation and confirming the intended event order.