Varaverk: monitor grid overhaul + Containers & VMs card

Monitor layout (8-col grid):
- Row 1: System | Power | CPU | Memory | Network
- Row 2: Scripts | Partner & Fallback (span 3) | Containers & VMs (span 4)
- Row 3: GPU (span 2) | Transcode (span 2) | Streams (span 4)
- Row 4: Parity (cols 1-2) | Pools (cols 3-4) | Array (cols 5-8)

New Containers & VMs card:
- Reads FolderView3 folders from docker.json; expand/collapse per folder
- VMs listed first (virsh); containers show start/stop/webui/edit actions
- 2-column balanced layout; collapses to 1 column below 900px
- Docker WebUI URLs resolved from dockerMan template XMLs

New files: include/vms.php, include/docker_folders.php, api/docker_action.php, api/snapshot.php
Responsive: explicit grid-column placements reset at 1024px breakpoint

Plugin/usr/local/emhttp/plugins/varaverk/include/vms.php

@@ -0,0 +1,46 @@
+<?php
+function vv_get_vms(): array {
+    if (!file_exists('/usr/bin/virsh')) return ['available' => false, 'vms' => []];
+
+    exec('virsh list --all --name 2>/dev/null', $names, $rc);
+    if ($rc !== 0) return ['available' => false, 'vms' => []];
+
+    $vms = [];
+    foreach ($names as $raw) {
+        $name = trim($raw);
+        if ($name === '') continue;
+
+        $state = trim(shell_exec('virsh domstate ' . escapeshellarg($name) . ' 2>/dev/null') ?? 'unknown');
+
+        $vcpus  = null;
+        $memMb  = null;
+        if ($state === 'running') {
+            $info = shell_exec('virsh dominfo ' . escapeshellarg($name) . ' 2>/dev/null') ?? '';
+            if (preg_match('/CPU\(s\)\s*:\s*(\d+)/i', $info, $m))       $vcpus = (int)$m[1];
+            if (preg_match('/Used memory\s*:\s*(\d+)/i', $info, $m))    $memMb = (int)round((int)$m[1] / 1024);
+        }
+
+        // OS detection from libvirt XML
+        $os = 'linux';
+        $xmlPath = '/etc/libvirt/qemu/' . $name . '.xml';
+        if (file_exists($xmlPath)) {
+            $xml = @file_get_contents($xmlPath) ?: '';
+            if (stripos($xml, 'windows') !== false || stripos($xml, 'win10') !== false || stripos($xml, 'win11') !== false) $os = 'windows';
+            elseif (stripos($xml, 'darwin') !== false || stripos($xml, 'macos') !== false) $os = 'macos';
+        }
+        $nl = strtolower($name);
+        if (str_contains($nl, 'win'))                                     $os = 'windows';
+        elseif (str_contains($nl, 'mac') || str_contains($nl, 'osx'))    $os = 'macos';
+        elseif (str_contains($nl, 'bsd') || str_contains($nl, 'freebsd')) $os = 'bsd';
+
+        $vms[] = [
+            'name'   => $name,
+            'state'  => $state,
+            'os'     => $os,
+            'vcpus'  => $vcpus,
+            'mem_mb' => $memMb,
+        ];
+    }
+
+    return ['available' => true, 'vms' => $vms];
+}