fix: onboarding gamepad — autofocus, click sounds, focus styles

All screens:
- playNavSound('action') on every button click
- path-action-button orange focus glow (removed from suppression list)

Per-screen autofocus:
- Intro: CTA button (after animation)
- Path: Continue button
- Identity: name input
- Backup: passphrase input, Continue after download
- Verify: Sign Challenge, then Finish after verification
- Done: Set Password button

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/OnboardingIntro.vue

@@ -73,6 +73,7 @@ import { ref, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 import AnimatedLogo from '@/components/AnimatedLogo.vue'
 import { rpcClient } from '@/api/rpc-client'
+import { playNavSound } from '@/composables/useNavSounds'
 
 const router = useRouter()
 const ctaButton = ref<HTMLButtonElement | null>(null)
@@ -85,6 +86,7 @@ onMounted(() => {
 })
 
 function goToOptions() {
+  playNavSound('action')
   router.push('/onboarding/path').catch(() => {})
 }