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>

app/combined/page.tsx

@@ -0,0 +1,16 @@
+import PageShell from "@/components/page-shell";
+import CombinedForm from "@/components/modes/combined-form";
+
+export default function CombinedPage() {
+  return (
+    <PageShell>
+      <div className="px-4 pt-6 text-center">
+        <h1 className="text-xl font-bold">综合测算</h1>
+        <p className="mt-1 text-sm text-muted-foreground">
+          天时 · 地利 · 人和 · 六爻可选
+        </p>
+      </div>
+      <CombinedForm />
+    </PageShell>
+  );
+}