🖱️ fix: Role and Group Scroll Areas (#5)

The roles/groups tab content wrapper was not a flex container, so
child flex-1 constraints were ignored and overflow-y-auto never
triggered — the list was clipped with no scrollbar.

Author: dustinhealy

src/components/access/AccessPage.tsx

@@ -34,7 +34,7 @@ export function AccessPage({
         </Tabs>
       )}
 
-      <div className="min-h-0 flex-1 overflow-hidden pt-3">
+      <div className="flex min-h-0 flex-1 flex-col overflow-hidden pt-3">
         {activeTab === 'groups' && canReadGroups && (
           <GroupsTab onCreateGroup={() => setCreateGroupOpen(true)} />
         )}