feat: gamepad navigation rewrite, focus styling, container grid system

- Rewrite useControllerNav.ts with clean console-style navigation:
  Sidebar (up/down wrap, right→containers, left→nothing),
  Container tile grid (spatial nav, no wrap at edges),
  Nav bar support (up from containers, down to grid),
  Inner controls (enter drills in, escape exits, trapped arrows)
- Add data-controller-container to Mesh, Fleet, Settings pages
- Fix Home.vue fragment (modals outside root div) causing Vue warnings
- Remove skip-to-content link (handled by controller nav)
- Orange ambient glow focus styling matching glass aesthetic
- Disable PWA service worker in dev mode (fixes HMR caching)
- Add gamepad-nav skill and GAMEPAD-NAV-MAP.md spec document
- 39 tests covering all navigation patterns

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

neode-ui/src/views/Home.vue

@@ -216,12 +216,12 @@
     <div v-if="uiMode.isChat" class="flex flex-col items-center justify-center min-h-[40vh]">
       <RouterLink to="/dashboard/chat" class="glass-button rounded-lg px-8 py-4 text-lg font-medium">{{ t('home.openAI') }}</RouterLink>
     </div>
-  </div>
 
-  <!-- Wallet Modals -->
-  <SendBitcoinModal :show="showSendModal" @close="showSendModal = false" @sent="loadWeb5Status()" />
-  <ReceiveBitcoinModal :show="showReceiveModal" @close="showReceiveModal = false" @received="loadWeb5Status()" />
-  <TransactionsModal :show="showTransactionsModal" :transactions="walletTransactions" @close="showTransactionsModal = false" />
+    <!-- Wallet Modals -->
+    <SendBitcoinModal :show="showSendModal" @close="showSendModal = false" @sent="loadWeb5Status()" />
+    <ReceiveBitcoinModal :show="showReceiveModal" @close="showReceiveModal = false" @received="loadWeb5Status()" />
+    <TransactionsModal :show="showTransactionsModal" :transactions="walletTransactions" @close="showTransactionsModal = false" />
+  </div>
 </template>
 
 <script setup lang="ts">