Closing the mobile sidebar requires clicking the dimming overlay; no clean outside-click close without the backdrop

Description

On mobile, opening the sidebar (hamburger) adds a modal-backdrop element (see et() in the bundle's app.js). The ONLY way to close the sidebar by an outside click is to click that backdrop — which also dims/blurs the page behind it.

Use cases this does not cover:

1. A project that does not want the dimming/blur overlay still has no clean way to get "click anywhere outside the sidebar → close", because removing/restyling the backdrop also breaks the close-on-outside-click behaviour.
2. The backdrop has no label/role/A11y attributes; relying on it as a close control is fragile.

Expected

• Provide a way to close the open mobile sidebar on any click outside .sidebar-wrapper (and outside #navigation-toggler), independent of the modal-backdrop.
• Make the outside-click-close a configurable/documented behaviour (e.g. a small JS/data attribute), so projects can keep or drop the backdrop separately from the close behaviour.

Workaround we use today (not viable upstream)

We had to remove the backdrop with a MutationObserver in our own JS and re-implement the outside-click-close by listening to document clicks:

document.addEventListener('click', function(e) {
    if (!document.body.classList.contains('ea-mobile-sidebar-visible')) return;
    if (e.target.closest('.sidebar-wrapper')) return;
    if (e.target.closest('#navigation-toggler')) return;
    document.body.classList.remove('ea-mobile-sidebar-visible');
});

This is exactly what the bundle's et() does via the backdrop's onclick — it should live in the bundle, not in app code.

Environment

EasyAdmin v5.5.1 (@media (max-width:991px) responsive header / mobile sidebar).

Start with the mobile-sidebar code in the bundled app.js, especially et() and its modal-backdrop click handler, then trace how the sidebar visibility class is toggled. Add a configurable outside-click behavior that excludes .sidebar-wrapper and #navigation-toggler while remaining independent of the backdrop. Done means projects can keep or remove the dimming overlay without losing outside-click closing.