fix: Fix css loading on direct links

nginx.conf

@@ -8,7 +8,10 @@ server {
     # ── Compression ───────────────────────────────────────────────────────────
     gzip on;
     gzip_vary on;
-    gzip_proxied any;
+    # "off" prevents nginx from gzip-encoding responses to proxies/gateways that
+    # already sent Accept-Encoding upstream. FragmentGateway decompresses server-side
+    # but can leak Content-Encoding header to the browser causing ERR_CONTENT_DECODING_FAILED.
+    gzip_proxied off;
     gzip_comp_level 6;
     gzip_types
         text/css
@@ -66,6 +69,10 @@ server {
     # Strip the /knowledge-base/ prefix so files resolve from the dist root.
     location ^~ /knowledge-base/ {
         rewrite ^/knowledge-base/(.*)$ /$1 break;
+        # Tell any intermediate proxy (e.g. web-fragments FragmentGateway) not to
+        # transcode/re-encode this response. Prevents Content-Encoding header
+        # leakage when the gateway auto-decompresses but still forwards the header.
+        add_header Cache-Control "no-transform" always;
         try_files $uri $uri/index.html =404;
     }