feat(admin): 运营后台（登录/查看/审核编辑/补全）+ 写入API + 审计留痕

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

admin-frontend/vite.config.ts

@@ -0,0 +1,9 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+
+// Served under /ping by the admin Go binary; base must match the nginx prefix.
+export default defineConfig({
+  base: "/ping/",
+  plugins: [react()],
+  build: { outDir: "dist", emptyOutDir: true },
+});