Implement three divination modes, learn pages, and PM2 deploy on port 3130.

Add liuyao/bazi/combined flows with shared calc and AI infrastructure, 64-gua learn routes, and update Ubuntu PM2 deployment docs for port 3130.

Co-authored-by: Cursor <cursoragent@cursor.com>

ecosystem.config.cjs

@@ -1,9 +1,11 @@
 /**
  * PM2 进程配置 — 知命阁（zhimingge）
  * 部署目录：/opt/zhimingge
+ * 生产端口：3130
  *
- * 启动：pm2 start ecosystem.config.cjs
+ * 首次：pm2 start ecosystem.config.cjs
  * 重启：pm2 restart zhimingge
+ * 日志：pm2 logs zhimingge
  */
 module.exports = {
   apps: [
@@ -11,7 +13,7 @@ module.exports = {
       name: "zhimingge",
       cwd: "/opt/zhimingge",
       script: "node_modules/next/dist/bin/next",
-      args: "start",
+      args: "start -p 3130",
       instances: 1,
       exec_mode: "fork",
       autorestart: true,
@@ -19,7 +21,7 @@ module.exports = {
       max_memory_restart: "512M",
       env: {
         NODE_ENV: "production",
-        PORT: 3000,
+        PORT: 3130,
       },
       error_file: "/opt/zhimingge/logs/pm2-error.log",
       out_file: "/opt/zhimingge/logs/pm2-out.log",