feat(recommendations): collect demographics and advance age cohorts

apps/mobile/src/app/(tabs)/index.tsx

@@ -9,6 +9,7 @@ import { player } from '../../player/controller';
 import { usePlayerState } from '../../player/hooks';
 import { useColors } from '../../theme';
 import { ErrorBox, Icon, Screen, useErrorText, type IconName } from '../../ui/kit';
+import { OnboardingGate } from '../../ui/Onboarding';
 import { WaveOrb } from '../../ui/wave/WaveOrb';
 
 /** Имена из /wave/options (Material Symbols) → MaterialIcons. */
@@ -22,6 +23,10 @@ function iconFor(name: string): IconName {
  * На Android спектр недоступен, поэтому пульс берётся из BPM и energy трека (docs/mobile.md).
  */
 export default function HomeScreen() {
+  return <OnboardingGate><WaveHome /></OnboardingGate>;
+}
+
+function WaveHome() {
   const colors = useColors();
   const { t } = useTranslation();
   const tr = t as unknown as (k: string) => string;