fix(oc-docs): cap menu dropdown height so long lists scroll

The assertion operator dropdown lists 28 options; the shared MenuDropdown
surface was capped at 90vh, which measures the browser viewport rather than
the embedded component, so the list spilled past the app. Cap the surface at
min(20rem, 90vh) so long lists scroll instead of overflowing.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: vasharma05-bruno

packages/oc-docs/src/ui/MenuDropdown/StyledWrapper.ts

@@ -16,7 +16,10 @@ export const StyledWrapper = styled.div`
   box-shadow: var(--oc-dropdown-shadow);
   border-radius: var(--oc-border-radius-base);
   border: 1px solid var(--oc-dropdown-border);
-  max-height: 90vh;
+  /* Cap the surface height so a long list (e.g. the assertion operators) scrolls
+     instead of spilling past the embedded component; min() keeps it within small
+     viewports too. */
+  max-height: min(20rem, 90vh);
   overflow-y: auto;
   max-width: unset !important;
   padding: 0.25rem;