fix: navigate scope in CCGraphNavPanel, class.code -> class_code in MyClassesPage

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

src/utils/tldraw/ui-overrides/components/shared/navigation/CCGraphNavPanel.tsx

@@ -484,6 +484,7 @@ function TreeItem({ node, depth, onSelect, onExpand }: TreeItemProps) {
 
 export function CCGraphNavPanel() {
     const { accessToken } = useAuth();
+    const navigate = useNavigate();
     const { navigateToNeoNode, context } = useNavigationStore();
     const [tree, setTree] = useState<TreeNode | null>(null);
     const [schoolStatus, setSchoolStatus] = useState<SchoolStatus | null>(null);