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/learn/other/page.tsx

@@ -0,0 +1,55 @@
+import Link from "next/link";
+import PageShell from "@/components/page-shell";
+import {
+  getGuaName,
+  getGuaNumber,
+  listGuaMarks,
+} from "@/lib/content/zhouyi";
+
+export default async function LearnOtherPage() {
+  const guaMarks = await listGuaMarks("simplified");
+
+  return (
+    <PageShell className="max-w-3xl px-4 py-8">
+      <div className="mb-6">
+        <h1 className="text-2xl font-bold">易经学习 · 简体图文版</h1>
+        <p className="mt-2 text-muted-foreground">
+          含互卦、错卦、综卦及更多注释（部分卦象图片待补全）
+        </p>
+        <Link
+          href="/learn"
+          className="mt-2 inline-block text-sm text-primary underline underline-offset-4"
+        >
+          ← 返回繁体精简版
+        </Link>
+      </div>
+      <div className="overflow-x-auto rounded-lg border">
+        <table className="w-full text-sm">
+          <thead className="bg-muted/50">
+            <tr>
+              <th className="px-4 py-2 text-left font-medium">序号</th>
+              <th className="px-4 py-2 text-left font-medium">卦名</th>
+            </tr>
+          </thead>
+          <tbody>
+            {guaMarks.map((mark) => (
+              <tr key={mark} className="border-t">
+                <td className="px-4 py-2 font-mono text-muted-foreground">
+                  {getGuaNumber(mark)}
+                </td>
+                <td className="px-4 py-2">
+                  <Link
+                    href={`/learn/other/${encodeURIComponent(mark)}`}
+                    className="text-primary underline-offset-4 hover:underline"
+                  >
+                    {getGuaName(mark)}
+                  </Link>
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+    </PageShell>
+  );
+}