chore: update environment configuration and deployment scripts

- Modified .env.production to include local development settings for WebSocket and API proxy.
- Updated .gitignore to remove unnecessary entries.
- Changed package.json to remove the React version requirement.
- Updated GitHub Actions workflow to use Bun for dependency installation and project build.

Author: windbytes

.env.production

@@ -1,4 +1,7 @@
-# 生产环境示例：请替换为你的网关域名。
-# WebSocket 由 Netty 提供（路径无 /api）；网关需将 /api/ws 转发到 Netty 的 /ws 并指向 websocket 端口。
-VITE_WS_URL=wss://your-gateway-domain/api/ws/syndra
+VITE_DEV_SERVER_PORT=8000
+VITE_API_PROXY_TARGET=http://localhost:9527
+# Netty WebSocket 端口（与后端 application.yml websocket.netty.port 一致；/api/ws 会 rewrite 到 /ws）
+VITE_WS_PROXY_TARGET=http://localhost:8891
+# 通过前端开发服务器：/api/ws 由 vite 转发到 Netty，其余 /api 仍走 Spring
+VITE_WS_URL=ws://localhost:8000/api/ws/syndra
 VITE_ENABLE_MONITOR_CONSOLE=true