fix(maintainerr): inject ingress base path into UI files for React Router

The upstream Maintainerr builds its Vite/React frontend with a
__PATH_PREFIX__ placeholder that gets replaced at runtime by start.sh
using the BASE_PATH env var. This sets:
- React Router's basename (createBrowserRouter)
- API base URL (axios calls)
- EventSource URLs
- Vite asset prefix

Without this replacement, React Router has an empty basename and can't
match the ingress URL (/api/hassio_ingress/<token>/), returning
"No route matches URL".

Fix: Replace __PATH_PREFIX__ in the built UI files with the HA ingress
entry before starting the app. Remove nginx sub_filters (no longer
needed since the UI files already reference the correct ingress-prefixed
URLs). Keep the nginx rewrite rule to strip the prefix on the server side.

Agent-Logs-Url: https://github.com/alexbelgium/hassio-addons/sessions/e0751563-06a4-4b4e-a4a7-63b2e5f66f03

Co-authored-by: alexbelgium <44178713+alexbelgium@users.noreply.github.com>

maintainerr/rootfs/etc/nginx/servers/ingress.conf

@@ -7,7 +7,6 @@ server {
     gzip_static off;
     client_max_body_size 0;
 
-    # Based on https://docs.maintainerr.info/ReverseProxy/#nginx-subdomain
     location / {
         set $app '%%ingress_entry%%';
 
@@ -23,7 +22,6 @@ server {
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
-        proxy_set_header Accept-Encoding "";
         proxy_read_timeout 90;
         add_header X-Frame-Options "SAMEORIGIN";
         add_header 'Referrer-Policy' 'no-referrer';
@@ -31,31 +29,5 @@ server {
         # Redirect location headers
         absolute_redirect off;
         proxy_redirect / $app/;
-
-        # Sub filters to rewrite URLs in responses
-        sub_filter_once off;
-        sub_filter_types *;
-
-        # HTML attribute rewrites
-        sub_filter 'href="/"' 'href="%%ingress_entry%%/"';
-        sub_filter 'src="/' 'src="%%ingress_entry%%/';
-        sub_filter 'action="/' 'action="%%ingress_entry%%/';
-
-        # API path rewrites
-        sub_filter '"/api' '"%%ingress_entry%%/api';
-        sub_filter '`/api' '`%%ingress_entry%%/api';
-        sub_filter "'/api" "'%%ingress_entry%%/api";
-
-        # Vite asset rewrites
-        sub_filter '"/assets' '"%%ingress_entry%%/assets';
-        sub_filter '`/assets' '`%%ingress_entry%%/assets';
-        sub_filter "'/assets" "'%%ingress_entry%%/assets";
-
-        # Favicon and static files
-        sub_filter '"/favicon' '"%%ingress_entry%%/favicon';
-        sub_filter '"/logo' '"%%ingress_entry%%/logo';
-
-        # Root path references in JavaScript
-        sub_filter '"\/"' '"%%ingress_entry%%\/"';
     }
 }

maintainerr/rootfs/ha_entrypoint.sh

@@ -65,6 +65,25 @@ if [ ! -f "$DATA_DIR/.initialized" ]; then
 fi
 export DATA_DIR
 
+# ─── Inject ingress base path into the built UI files ─────────────────────────
+# The upstream Maintainerr Vite build embeds /__PATH_PREFIX__ as a placeholder
+# for the base URL. The upstream start.sh replaces it with $BASE_PATH at runtime.
+# For HA ingress, the base path is the dynamic ingress entry (e.g.
+# /api/hassio_ingress/<token>). We perform the replacement here so the React
+# Router basename and all asset/API URLs point through the ingress path.
+# We intentionally do NOT export BASE_PATH so that the NestJS server keeps its
+# routes at the root — nginx's rewrite rule strips the ingress prefix on the
+# server side.
+ingress_entry="$(bashio::addon.ingress_entry 2>/dev/null || true)"
+if [ -n "$ingress_entry" ]; then
+    UI_DIST_DIR="/opt/app/apps/server/dist/ui"
+    if [ -d "$UI_DIST_DIR" ]; then
+        echo "[Maintainerr] Setting ingress base path: $ingress_entry"
+        find "$UI_DIST_DIR" -type f -not -path '*/node_modules/*' \
+            -print0 | xargs -0 sed -i "s,/__PATH_PREFIX__,${ingress_entry},g" 2>/dev/null || true
+    fi
+fi
+
 # ─── Start Maintainerr as unprivileged node user ─────────────────────────────
 echo "[Maintainerr] Starting application on port ${UI_PORT:-6246}..."
 exec gosu node /opt/app/start.sh &