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/OnboardingIdentity.vue

@@ -33,7 +33,7 @@
               <button
                 v-for="p in purposes"
                 :key="p.value"
-                @click="selectedPurpose = p.value"
+                @click="playNavSound('action'); selectedPurpose = p.value"
                 class="px-4 py-3 rounded-lg border text-left transition-all"
                 :class="selectedPurpose === p.value
                   ? 'bg-white/15 border-white/30 text-white'
@@ -79,6 +79,7 @@
 import { ref, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { rpcClient } from '@/api/rpc-client'
+import { playNavSound } from '@/composables/useNavSounds'
 
 const router = useRouter()
 const nameInput = ref<HTMLInputElement | null>(null)
@@ -117,6 +118,7 @@ async function createIdentity() {
         purpose: selectedPurpose.value
       }
     })
+    playNavSound('action')
     router.push('/onboarding/backup').catch(() => {})
   } catch (err) {
     if (isServerStartingError(err)) {