Allow modal dropdowns and tooltips to overflow their panel

Switch the BaseModal panel container from overflow-hidden to overflow-visible so multiselect dropdowns, autocompletes and tooltips can render outside the modal bounds. Same fix as the settings layout panel earlier — Headless UI's dialog still clips at the viewport, and the modal panel keeps its rounded-xl corners through its own bg-surface background, so removing the clip exposes no square-corner regression on existing modals.

resources/scripts-v2/components/base/BaseModal.vue

@@ -54,7 +54,7 @@
               bg-surface/95 backdrop-blur-xl backdrop-saturate-150
               rounded-xl border border-line-default
               text-left
-              overflow-hidden
+              overflow-visible
               relative
               shadow-2xl
               transition-all