fix: escape Cierre quotes, commit eslint deps, restore build lint gate

next.config.mjs

@@ -2,11 +2,6 @@
 const nextConfig = {
   output: 'export',
   images: { unoptimized: true },
-  // Lint is verified separately via `npx next lint` (Task 12 Step 9);
-  // decoupled from the build so a pre-existing, out-of-scope lint issue
-  // (react/no-unescaped-entities in components/sections/Cierre.tsx) does
-  // not block the static export build.
-  eslint: { ignoreDuringBuilds: true },
 };
 
 export default nextConfig;