Fix mobile nav visibility and stale stats link; add nginx security headers to config

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

kingmaker.gateway-gamers.net.conf

@@ -0,0 +1,36 @@
+server {
+    listen 80;
+    listen [::]:80;
+    server_name kingmaker.gateway-gamers.net;
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    server_name kingmaker.gateway-gamers.net;
+
+    root /var/www/domains/gateway-gamers.net/kingmaker;
+    index index.html;
+
+    # SSL — managed by Certbot
+    # ssl_certificate /etc/letsencrypt/live/kingmaker.gateway-gamers.net/fullchain.pem;
+    # ssl_certificate_key /etc/letsencrypt/live/kingmaker.gateway-gamers.net/privkey.pem;
+    # include /etc/letsencrypt/options-ssl-nginx.conf;
+    # ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+
+    # Hide nginx version
+    server_tokens off;
+
+    # Security headers
+    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
+    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self'; frame-src https://docs.google.com; img-src 'self' data:;" always;
+
+    location / {
+        try_files $uri $uri/ =404;
+    }
+}

public/header.html

@@ -26,7 +26,7 @@
 
   <!-- Nav row -->
   <div class="navbar bg-base-200 px-4 min-h-0 py-2">
-    <div class="navbar-center flex flex-1 justify-center">
+    <div class="navbar-center hidden lg:flex flex-1 justify-center">
       <ul class="menu menu-horizontal px-1 gap-1">
         <li><a href="/index.html">Home</a></li>
         <li><a href="/signups.html">Sign-ups</a></li>
@@ -54,7 +54,7 @@
           <li><a href="/index.html">Home</a></li>
           <li><a href="/signups.html">Sign-ups</a></li>
           <li><a href="/reporting.html">Game Reporting</a></li>
-          <li><a href="/stats.html">Stats</a></li>
+          <li><a href="/standings.html">Standings</a></li>
         </ul>
       </div>
     </div>