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/scheduler.php

@@ -33,6 +33,23 @@ function vv_schedule_update(string $id, bool $enabled, string $cron, bool $log_e
     return vv_cron_rebuild($schedule);
 }
 
+function vv_schedule_update_batch(array $entries): bool {
+    $schedule = vv_schedule_load();
+    foreach ($entries as $e) {
+        $id = trim($e['id'] ?? '');
+        if (!$id) continue;
+        $schedule[$id] = [
+            'id'          => $id,
+            'enabled'     => (bool)($e['enabled'] ?? false),
+            'cron'        => trim($e['cron'] ?? ''),
+            'log_enabled' => (bool)($e['log_enabled'] ?? false),
+            'updated'     => date('c'),
+        ];
+    }
+    if (!vv_schedule_save($schedule)) return false;
+    return vv_cron_rebuild($schedule);
+}
+
 function vv_job_flags(string $id): string {
     $schedule = vv_schedule_load();
     return !empty($schedule[$id]['log_enabled']) ? '--log' : '';