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/api/scheduler.php

@@ -2,6 +2,28 @@
 header('Content-Type: application/json');
 require_once dirname(__DIR__) . '/include/scheduler.php';
 
+// Batch save — all entries in one load/write/rebuild cycle
+if (!empty($_POST['batch'])) {
+    $entries = json_decode($_POST['batch'], true) ?: [];
+    $clean   = [];
+    foreach ($entries as $e) {
+        $id   = trim($e['id'] ?? '');
+        $cron = trim($e['cron'] ?? '');
+        if (!$id) continue;
+        if ($cron && !in_array($cron, ['@array_start', '@array_stop'], true)
+                  && !preg_match('/^(\S+\s+){4}\S+$/', $cron)) $cron = '';
+        $clean[] = [
+            'id'          => $id,
+            'enabled'     => ($e['enabled'] ?? '0') === '1',
+            'cron'        => $cron,
+            'log_enabled' => ($e['log_enabled'] ?? '0') === '1',
+        ];
+    }
+    $ok = vv_schedule_update_batch($clean);
+    echo json_encode(['ok' => $ok, 'error' => $ok ? null : 'Failed to write schedule']);
+    exit;
+}
+
 $id          = trim($_POST['id']      ?? '');
 $enabled     = (bool)($_POST['enabled'] ?? false);
 $cron        = trim($_POST['cron']    ?? '');