From 25a076d6382364be37575a09bf66939e34e6ac4c Mon Sep 17 00:00:00 2001
From: Jack Carter <128555021+SunsetDrifter@users.noreply.github.com>
Date: Mon, 3 Aug 2026 10:57:42 +0200
Subject: [PATCH] fix: serve page props for API docs on client-side navigation

The /ipa/:path* -> /api/:path* redirect also matched Next.js data
requests (/_next/data/.../ipa/...), returning a 308 instead of page
props. Client-side navigations to API pages therefore lost pageProps,
leaving the sidebar method list collapsed and the tab title undefined
until a full reload. Skip the redirect when the x-nextjs-data header is
present so props fetches go through; browser visits to /ipa/* still get
the canonical redirect to /api/*.
---
 next.config.mjs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/next.config.mjs b/next.config.mjs
index 111b35ce9..d72c28c30 100644
--- a/next.config.mjs
+++ b/next.config.mjs
@@ -103,7 +103,16 @@ const nextConfig = {
             {
                 source: '/ipa/:path*',
                 destination: '/api/:path*',
-                permanent: true
+                permanent: true,
+                // Client-side navigations fetch page props from
+                // /_next/data/<buildId>/ipa/... — redirecting those requests
+                // strips pageProps (title, sections), so skip data requests.
+                missing: [
+                    {
+                        type: 'header',
+                        key: 'x-nextjs-data',
+                    },
+                ],
             },
             // documentation redirects for about
             {