Fix ESLint warnings

eslint.config.mjs

@@ -9,6 +9,12 @@ const compat = new FlatCompat({
   baseDirectory: __dirname,
 });
 
-const eslintConfig = [...compat.extends("next/core-web-vitals")];
+const eslintConfig = [
+  ...compat.extends("next/core-web-vitals"),
+  {
+    files: ["**/*.js", "**/*.jsx", "**/*.mjs"],
+    ignores: ["**/*.ts", "**/*.tsx"],
+  },
+];
 
 export default eslintConfig;