Fix profile dropdown width to show full currency display

- Increase dropdown width from w-56 to w-64
- Prevents EverQuest-style coin display from being cut off

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/layout/AppTopBar.vue

@@ -170,7 +170,7 @@ const navigateToNotifications = () => {
                 </span>
               </Button>
             </DropdownMenuTrigger>
-            <DropdownMenuContent align="end" class="w-56">
+            <DropdownMenuContent align="end" class="w-64">
               <!-- Wallet Balance -->
               <DropdownMenuItem @click="() => router.push('/wallet')" class="gap-2">
                 <Wallet class="h-4 w-4 text-muted-foreground" />