web: use outline for focus ring instead of box-shadow

- prevents conflicts with existing box-shadow(s) on basically all components
- removes the need for data-focus-ring-hidden or any other weird workarounds

web/src/components/dialog/PickerItem.svelte

@@ -72,7 +72,8 @@
         width: 100%;
         height: 100%;
         position: absolute;
-        box-shadow: var(--focus-ring);
+        outline: var(--focus-ring);
+        outline-offset: var(--focus-ring-offset);
         border-radius: inherit;
     }