Fix Android safe-area handling and window maximization

- Fix extension signature verification on Android by canonicalizing paths (symlink compatibility)
- Implement proper safe-area-inset handling for mobile devices
- Add reactive header height measurement to UI store
- Fix maximized window positioning to respect safe-areas and header
- Create reusable HaexDebugOverlay component for mobile debugging
- Fix Swiper navigation by using absolute positioning instead of flex-1
- Remove debug logging after Android compatibility confirmed

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/pages/vault/[vaultId]/index.vue

@@ -1,7 +1,7 @@
 <template>
-  <div class="w-full h-full flex items-center justify-center">
+  <UDashboardPanel resizable>
     <HaexDesktop />
-  </div>
+  </UDashboardPanel>
 </template>
 
 <script setup lang="ts">