fix: use unix timestamp for cache busting, generic server icon for Other category

- Replace hardcoded date version strings with dynamic timestamps:
  overview.tpl uses {$smarty.now}, hooks.php uses time(), AdminHTML uses
  $cacheV = time() in heredoc
- Other category gets a gray server/terminal SVG icon instead of falling
  through to the OS-specific letter badge

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

modules/servers/VirtFusionDirect/lib/AdminHTML.php

@@ -34,9 +34,10 @@ EOT;
     public static function serverInfo($systemUrl, $serviceId)
     {
         $systemUrl = htmlspecialchars($systemUrl, ENT_QUOTES, 'UTF-8');
+        $cacheV = time();
         return <<<EOT
-            <link href="${systemUrl}modules/servers/VirtFusionDirect/templates/css/module.css?v=20260319" rel="stylesheet">
-            <script src="${systemUrl}modules/servers/VirtFusionDirect/templates/js/module.js?v=20260319"></script>
+            <link href="${systemUrl}modules/servers/VirtFusionDirect/templates/css/module.css?v=${cacheV}" rel="stylesheet">
+            <script src="${systemUrl}modules/servers/VirtFusionDirect/templates/js/module.js?v=${cacheV}"></script>
             <div id="vf-loader" class="vf-loader">
                <div id="vf-loading"></div>
             </div>