chore(docs): eslint flat config and verify next build

Made-with: Cursor

apps/docs/eslint.config.mjs

@@ -0,0 +1,21 @@
+import { dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+});
+
+export default [
+  ...compat.extends("next/core-web-vitals", "next/typescript"),
+  {
+    files: ["mdx-components.tsx"],
+    rules: {
+      // Nextra 主题在模块顶层合并默认 MDX 组件；与 `use*` 命名冲突于 hooks 规则，见 https://nextra.site/docs/file-conventions/mdx-components-file
+      "react-hooks/rules-of-hooks": "off",
+    },
+  },
+];