Give MultiSelect chips accessible names and start creation fields empty.

Catalog chips now announce Select or Deselect so they are named for assistive tech. Method and value modals open blank; Generate draft inserts the catalog copy that used to be prefilled, and Customize still keeps the section headings.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/components/controls/Chip/Chip.view.tsx

@@ -156,7 +156,7 @@ function ChipView({
   };
 
   const sharedA11y = {
-    "aria-label": ariaLabel,
+    ...(ariaLabel ? { "aria-label": ariaLabel } : {}),
     ...(isToggle ? { "aria-pressed": isSelected } : {}),
   };