Enhance Proxmox views with improved loading states and UI updates

- Updated serverplaceholder.blade.php to enhance loading skeletons for server details.
- Added navigation breadcrumbs to statistics, subdomain, and system views for better user experience.
- Improved loading indicators for CPU, network, memory, and disk charts in statistics.blade.php.
- Refined storage.blade.php layout with section dividers and improved drive display, including bus type indicators and quota usage.
- Enhanced VNC and Xterm popups with a new header design, loading animations, and reconnect functionality.
- Added error handling for VNC and Xterm connections to inform users when unable to connect.

extensions/Servers/Proxmox/views/subdomain.blade.php

@@ -1,4 +1,9 @@
 <x-proxmox::layout :server="$server" view="subdomain" :status="$status" :status-polling="true" :status-polling-interval="'2s'">
+    <div class="flex items-center gap-1.5 text-xs text-base/50 mb-4">
+        <a href="{{ route('proxmox.server.overview', ['server' => $server->id]) }}" wire:navigate class="hover:text-primary transition-colors">Overview</a>
+        <x-ri-arrow-right-s-line class="size-3" />
+        <span class="text-base/70">Subdomain</span>
+    </div>
     <div class="flex items-center justify-between mb-6">
         <div>
             <div class="flex items-center gap-2 min-w-0">