fix(popover-inline): prevent scrollbars from appearing in Safari

The base popover's `.ce-popover__items` has `overflow-y: auto`, which
causes Safari to render visible scrollbars on the inline toolbar. Since
the inline popover container uses `width: max-content` and grows to fit
its content, scrolling is not needed.

Override `overflow-y` to `visible` in the inline popover items to
prevent Safari from showing scrollbars.

Fixes #2988

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Your Name

src/styles/popover-inline.css

@@ -14,6 +14,7 @@
 
   .ce-popover__items {
     display: flex;
+    overflow-y: visible;
   }
 
   .ce-popover__container {