init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp/app/lending/page.tsx

@@ -0,0 +1,53 @@
+"use client";
+
+import Sidebar from "@/components/layout/Sidebar";
+import TopBar from "@/components/layout/TopBar";
+import LendingHeader from "@/components/lending/LendingHeader";
+import LendingStats from "@/components/lending/LendingStats";
+import LendingPlaceholder from "@/components/lending/LendingPlaceholder";
+import BorrowMarket from "@/components/lending/BorrowMarket";
+import { useApp } from "@/contexts/AppContext";
+
+export default function LendingPage() {
+  const { t } = useApp();
+  const breadcrumbItems = [
+    { label: "ASSETX", href: "/" },
+    { label: t("nav.lending") },
+  ];
+
+  return (
+    <div className="min-h-screen bg-white dark:bg-gray-900 flex">
+      <Sidebar />
+      <div className="flex-1 min-w-0 flex flex-col md:ml-[240px] pt-14 md:pt-0">
+        <div className="bg-[#F3F4F6] dark:bg-gray-800 border-b border-border-normal dark:border-gray-700 px-4 md:px-8 py-3">
+          <TopBar breadcrumbItems={breadcrumbItems} />
+        </div>
+
+        <div className="flex-1 px-4 md:px-8 py-4 md:py-8 bg-[#F3F4F6] dark:bg-gray-900 flex flex-col gap-4 md:gap-8">
+
+          {/* Market Tab Switcher */}
+          <div className="flex gap-1 bg-bg-surface dark:bg-gray-800 border border-border-gray dark:border-gray-700 rounded-2xl p-1 self-start">
+            <button
+              className="px-5 py-2 rounded-xl text-body-small font-bold bg-foreground text-background shadow-sm"
+            >
+              USDC Market
+            </button>
+            <button
+              disabled
+              className="px-5 py-2 rounded-xl text-body-small font-bold text-text-tertiary dark:text-gray-600 cursor-not-allowed opacity-50"
+            >
+              USDT Market
+            </button>
+          </div>
+
+          <LendingHeader market="USDC" />
+          <div className="flex flex-col md:grid md:gap-8 md:grid-cols-[760fr_362fr] gap-4">
+            <LendingStats />
+            <LendingPlaceholder />
+          </div>
+          <BorrowMarket market="USDC" />
+        </div>
+      </div>
+    </div>
+  );
+}