chore: initialize Next.js project baseline

eslint.config.mjs

@@ -0,0 +1,42 @@
+import { FlatCompat } from "@eslint/eslintrc";
+import js from "@eslint/js";
+import tseslint from "typescript-eslint";
+
+const compat = new FlatCompat({
+  baseDirectory: import.meta.dirname,
+  recommendedConfig: js.configs.recommended,
+});
+
+const eslintConfig = [
+  {
+    ignores: [
+      ".next/**",
+      "node_modules/**",
+      "out/**",
+      "next-env.d.ts",
+      ".agents/**",
+      ".claude/**",
+      ".codex/**",
+      ".cursor/**",
+      ".pi/**",
+      ".playwright-mcp/**",
+      ".serena/**",
+      ".spec-workflow/**",
+      ".trae/**",
+      ".trellis/**",
+      "output/**",
+      "tmp/**",
+      "teatea-dashboard-*.png",
+      "teatea-mobile-snapshot.md",
+    ],
+  },
+  ...compat.extends("next/core-web-vitals"),
+  ...tseslint.configs.recommended,
+  {
+    rules: {
+      "@typescript-eslint/no-explicit-any": "error",
+    },
+  },
+];
+
+export default eslintConfig;