Disable firstpage and lastpage links when already there

theme-source/partials/paginator.js

@@ -31,7 +31,7 @@ export function Paginator({ metadata, file, config }) {
       <li>
         <a
           href={
-            metadata.firstpage
+            metadata.firstpage && metadata.firstpage.file !== file
               ? `${config.baseurl}/${metadata.firstpage.file}`
               : undefined
           }
@@ -86,7 +86,7 @@ export function Paginator({ metadata, file, config }) {
       <li>
         <a
           href={
-            metadata.lastpage
+            metadata.lastpage && metadata.lastpage.file !== file
               ? `${config.baseurl}/${metadata.lastpage.file}`
               : undefined
           }