feat(custom-widgets): Full Mantine v9 + SubFetch support for custom JSX (#6304)

apps/nextjs/src/components/board/items/item-select-modal.tsx

@@ -165,7 +165,7 @@ export const ItemSelectModal = createModal<void>(({ actions }) => {
                   </Text>
                 </Group>
                 <Text lh={1.2} style={{ whiteSpace: "normal" }} size="xs" c="dimmed" lineClamp={1}>
-                  {def.description ?? def.url}
+                  {def.description ?? ""}
                 </Text>
               </Stack>
               <Box