feat: Add full CRUD functionality, project detail panel, and improved UI

- Add UPDATE and DELETE endpoints to backend
- Implement project detail panel with comprehensive editing
- Add drag-and-drop functionality for projects in mind map
- Show all projects in map (not just selected + children)
- Fix infinite render loop in MindMap component
- Improve UI spacing and button layouts
- Add local development database schema with RLS disabled
- Update docker-compose for regular docker-compose (not Swarm)
- Add CORS support and nginx API proxying
- Improve button spacing and modern design principles

frontend/nginx.conf

@@ -2,6 +2,33 @@ server {
     listen 80;
     server_name localhost;
 
+    # Proxy API requests to backend
+    location /api {
+        proxy_pass http://backend:3000;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        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;
+        proxy_cache_bypass $http_upgrade;
+    }
+
+    # Proxy direct backend endpoints (projects, tenants, etc.)
+    location ~ ^/(projects|tenants) {
+        proxy_pass http://backend:3000;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        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;
+        proxy_cache_bypass $http_upgrade;
+    }
+
+    # Serve frontend static files
     location / {
         root /usr/share/nginx/html;
         index index.html index.htm;