docs: move edit date to footer (#11667)

* docs: move edit date to footer

* fix build error

www/apps/user-guide/components/EditButton/index.tsx

@@ -2,16 +2,27 @@
 
 import { EditButton as UiEditButton } from "docs-ui"
 import { usePathname } from "next/navigation"
+import { useMemo } from "react"
+import { generatedEditDates } from "../../generated/edit-dates.mjs"
 
 const EditButton = () => {
   const pathname = usePathname()
 
+  const editDate = useMemo(
+    () =>
+      (generatedEditDates as Record<string, string>)[
+        `app${pathname.replace(/\/$/, "")}/page.mdx`
+      ],
+    [pathname]
+  )
+
   return (
     <UiEditButton
       filePath={`/www/apps/user-guide/app${pathname.replace(
         /\/$/,
         ""
       )}/page.mdx`}
+      editDate={editDate}
     />
   )
 }