From 146e9c04a58ee6c3739b81f81ab6bcca20f7c9b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Asger=20Geel=20Weirs=C3=B8e?= <cla@weircon.dk>
Date: Wed, 30 Sep 2026 21:19:38 +0200
Subject: [PATCH] pwa: ingen SPA-fallback i service workeren

Standarden svarede ALLE navigationer, den ikke havde precachet, med den
cachede forside. Derfor viste /tarballz/ (serveres af nginx uden for
Astro-bygget) og ukendte adresser forsiden i stedet for den rigtige side
eller 404. Alle Astro-sider er precachet i forvejen.

Claude-Session: https://claude.ai/code/session_012LCTmU2ewo8tnM1dByYAoG
---
 astro.config.mjs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/astro.config.mjs b/astro.config.mjs
index 716ad0a..dad198a 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -170,6 +170,11 @@ export default defineConfig({
         cleanupOutdatedCaches: true,
         clientsClaim: true,
         skipWaiting: true,
+        // No SPA fallback. The default answers EVERY navigation it has not
+        // precached with the cached front page, so /tarballz/ (served by nginx
+        // outside the Astro build) and unknown URLs showed the home page instead
+        // of the real page or the 404. Every Astro page is precached anyway.
+        navigateFallback: null,
       },
       devOptions: { enabled: false },
     }),