fix: onboarding gamepad focus styles + sounds

- glass-button gets orange glow on focus-visible (was suppressed)
- Input fields get orange border on focus-visible
- Restore link made focusable (tabindex, role, keydown.enter)
- Gamepad nav sounds play via existing fallback handler

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

neode-ui/src/style.css

@@ -60,7 +60,6 @@
 }
 
 /* Elements with existing styles: suppress the global glow, let their own styles handle it */
-.glass-button:focus-visible,
 .glass-card:focus-visible,
 .sidebar-nav-item:focus-visible,
 .path-action-button:focus-visible,
@@ -70,6 +69,18 @@ input:focus-visible,
 textarea:focus-visible,
 select:focus-visible {
   box-shadow: unset;
+  border-color: rgba(251, 146, 60, 0.4);
+  outline: none;
+}
+
+/* Glass button: orange glow on gamepad/keyboard focus */
+.glass-button:focus-visible {
+  outline: none;
+  box-shadow:
+    0 0 0 1px rgba(251, 146, 60, 0.5),
+    0 0 16px rgba(251, 146, 60, 0.25),
+    0 0 32px rgba(251, 146, 60, 0.1);
+  border-color: rgba(251, 146, 60, 0.4);
 }
 
 /* Mobile touch targets — ensure tappable elements meet 44px minimum */