feat: configure it0.szaiai.com and it0api.szaiai.com domains

- Update Kong CORS origins to allow it0.szaiai.com
- Update WebSocket URL to wss://it0api.szaiai.com
- Fix proxy route to read API_BASE_URL at request time
  (was being inlined at build time by Next.js standalone)

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

deploy/docker/docker-compose.yml

@@ -327,7 +327,7 @@ services:
       - HOSTNAME=0.0.0.0
       - API_BASE_URL=http://api-gateway:8000
       - NEXT_PUBLIC_API_BASE_URL=/api/proxy
-      - NEXT_PUBLIC_WS_URL=ws://localhost:18000
+      - NEXT_PUBLIC_WS_URL=wss://it0api.szaiai.com
     healthcheck:
       test: ["CMD-SHELL", "node -e \"require('http').get('http://127.0.0.1:3000/',r=>{process.exit(r.statusCode<500?0:1)}).on('error',()=>process.exit(1))\""]
       interval: 30s

packages/gateway/config/kong.yml

@@ -101,7 +101,8 @@ plugins:
     config:
       origins:
         - http://localhost:3000
-        - https://admin.it0.your-domain.com
+        - https://it0.szaiai.com
+        - http://it0.szaiai.com
       methods:
         - GET
         - POST