message: fix(plugin-docs): toc route not found
diff: @@ -2,8 +2,13 @@ import React from 'react';
  import { useThemeContext } from './context';
  export default () => {
  - const { location, appData } = useThemeContext();
  + const { location, appData } = useThemeContext()!;
  const route = appData.routes[location.pathname.slice(1)];
  +
  + if (!route) {
  + return null;
  + }
  +
  const titles = route.titles.filter((t: any) => t.level > 1);
  return (
  <div>
  