Fix nginx try_files to prefer .html over directories

nginx.conf

@@ -18,8 +18,9 @@ server {
 
     # Handle Next.js static export routes
     location / {
-        # Try exact file, then .html extension, then directory, then fallback to index.html
-        try_files $uri $uri.html $uri/ /index.html;
+        # Try exact file, then .html extension, then directory index, then fallback
+        # Note: $uri.html must come before $uri/ to handle directories without index.html
+        try_files $uri $uri.html $uri/index.html /index.html;
     }
 
     # Cache static assets