fix(infra): use ^~ prefix location for /api and /ws to match without trailing slash

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

infra/docker/nginx/nginx.conf

@@ -15,8 +15,8 @@ server {
     listen 80;
     server_name imphnen.asepharyana.my.id;
 
-    # API proxy
-    location /api/ {
+    # API proxy — matches /api and /api/*
+    location ^~ /api {
         proxy_pass http://backend;
         proxy_set_header Host              $host;
         proxy_set_header X-Real-IP         $remote_addr;
@@ -24,8 +24,8 @@ server {
         proxy_set_header X-Forwarded-Proto $scheme;
     }
 
-    # WebSocket proxy
-    location /ws {
+    # WebSocket proxy — matches /ws and /ws/*
+    location ^~ /ws {
         proxy_pass http://backend;
         proxy_http_version 1.1;
         proxy_set_header Upgrade              $http_upgrade;