refactor: replace pony configurator with pixel art sprites from zip

- Removed PonyConfiguratorPage, PonyAvatar, ponyCustomization
- Flow is now: Home → Theme → Pony Select → Game (no configurator step)
- Added pixel art pony sprite sheets from /tmp/Pixel Ponies.zip
- GameScenePage uses pony image directly instead of SVG avatar
- 48 frontend + 67 backend tests passing

deploy/nginx-mlp.conf

@@ -0,0 +1,30 @@
+server {
+    listen 8082;
+    listen 8443 ssl;
+    server_name _;
+
+    ssl_certificate /etc/nginx/ssl/pony.crt;
+    ssl_certificate_key /etc/nginx/ssl/pony.key;
+    ssl_protocols TLSv1.2 TLSv1.3;
+
+    location /api/ {
+        proxy_pass http://127.0.0.1:5001;
+        proxy_set_header Host $host;
+        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;
+    }
+
+    location /static/images/ {
+        proxy_pass http://127.0.0.1:5001;
+        proxy_set_header Host $host;
+    }
+
+    location / {
+        proxy_pass http://127.0.0.1:3001;
+        proxy_set_header Host $host;
+        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;
+    }
+}

deploy/pony-cert.ext

@@ -0,0 +1,4 @@
+basicConstraints=critical,CA:FALSE
+keyUsage=critical,digitalSignature,keyEncipherment
+extendedKeyUsage=serverAuth
+subjectAltName=IP:192.168.1.96,DNS:pony.dencker.local,DNS:denckerserver.local