feat: Puente Mayúscula-Minúscula + TTS SpeechSynthesis + E2E fixes

app/child/layout.tsx

@@ -0,0 +1,26 @@
+"use client"
+
+import { useEffect, useState } from "react"
+import AudioUnlock from "@/components/child/audio-unlock"
+
+export default function ChildLayout({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  const [audioReady, setAudioReady] = useState(false)
+
+  useEffect(() => {
+    document.body.style.overscrollBehavior = "none"
+  }, [])
+
+  if (!audioReady) {
+    return <AudioUnlock onUnlock={() => setAudioReady(true)} />
+  }
+
+  return (
+    <div className="min-h-dvh bg-background flex flex-col">
+      {children}
+    </div>
+  )
+}