Initial commit: Nexus Mission Control Platform

- ASP.NET Core 10 Backend (JWT Auth, Agent config API)
- Vue 3 Frontend (Dashboard, Team, Agents, Config Editor)
- PostgreSQL Database
- Docker Compose setup
- Mission Control Dashboard redesign

frontend/nginx.conf

@@ -0,0 +1,29 @@
+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    add_header Content-Security-Policy "default-src 'self'; connect-src 'self'; img-src 'self' data:; script-src 'self'; style-src 'self' 'unsafe-inline'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'" always;
+    add_header Referrer-Policy "no-referrer" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-Frame-Options "DENY" always;
+    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
+
+    location /api/ {
+        proxy_pass http://api:8080;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    location /health {
+        proxy_pass http://api:8080/health;
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}
+