docs: hide sidebar button on pages with no sidebar (#4158)

www/docs/src/context/sidebar.ts

@@ -1,6 +1,7 @@
 import { createContext } from "react"
 
 type SidebarContextType = {
+  hasSidebar: boolean
   hiddenSidebar: boolean
   setHiddenSidebar: (value: boolean) => void
   hiddenSidebarContainer: boolean

www/docs/src/theme/DocPage/index.tsx

@@ -91,6 +91,8 @@ export default function DocPage(props: Props): JSX.Element {
     }
   })
 
+  console.log(sidebarName)
+
   return (
     <>
       <DocPageMetadata {...props} />
@@ -107,6 +109,7 @@ export default function DocPage(props: Props): JSX.Element {
           <DocsSidebarProvider name={sidebarName} items={sidebarItems}>
             <SidebarContext.Provider
               value={{
+                hasSidebar: sidebarName !== undefined,
                 hiddenSidebar,
                 setHiddenSidebar,
                 hiddenSidebarContainer,

www/docs/src/theme/Navbar/Content/index.tsx

@@ -84,7 +84,7 @@ export default function NavbarContent(): JSX.Element {
         <>
           {!mobileSidebar.disabled && <NavbarMobileSidebarToggle />}
           <NavbarLogo />
-          {hideable && (
+          {hideable && sidebarContext?.hasSidebar && (
             <NavbarActions
               items={[
                 {