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/hooks/useContractRegistry.ts

@@ -0,0 +1,27 @@
+'use client'
+
+import { useEffect } from 'react'
+import { useQuery } from '@tanstack/react-query'
+import { fetchContracts } from '@/lib/api/contracts'
+import { setContractAddressDynamic } from '@/lib/contracts/registry'
+
+/**
+ * Fetches contract addresses from the backend and populates the dynamic registry.
+ * Call once near the app root (e.g., inside Providers or AppContext).
+ * All existing getContractAddress() callers automatically see updated values.
+ */
+export function useContractRegistry() {
+  const { data } = useQuery({
+    queryKey: ['contract-registry'],
+    queryFn: fetchContracts,
+    staleTime: 5 * 60 * 1000,
+    gcTime: 30 * 60 * 1000,
+  })
+
+  useEffect(() => {
+    if (!data) return
+    for (const c of data) {
+      if (c.address) setContractAddressDynamic(c.name, c.chain_id, c.address)
+    }
+  }, [data])
+}