Varaverk: arrange mode, folder management, rsync standalone, layout fixes

Scheduler UI:
- Arrange mode: drag scripts between orchs and reorder within arrays; right
  panel shows unassigned script pool; Save Arrangement commits to master.conf
- + Folder: named collapsible subfolders for Custom Scripts stored in schedule.json
- Rsync children: hide Run/Dry Run/Log/location when orch is ON; show standalone
  location + cron controls when orch is OFF; cron only fires when both filled
- Non-conf-managed children (transcode): toggles now show enabled when orch is on
- Right panel height sync: fix ResizeObserver feedback loop via align-self:flex-start
  on left panel and left.offsetHeight in vvFitRight
- How do I use this: updated to cover arrange, folders, rsync standalone, transcode

New API endpoints:
- board.php, clearlock.php, movescript.php, rawconf.php, readscript.php
- reorderarray.php, rsync_standalone.php, savefolders.php

run.php / dryrun.php: accept optional --location= arg for standalone rsync calls

Plugin/usr/local/emhttp/plugins/varaverk/api/readscript.php

@@ -0,0 +1,20 @@
+<?php
+// Read-only endpoint: return full content of any script in SCRIPTS_DIR.
+header('Content-Type: application/json');
+require_once dirname(__DIR__) . '/include/config.php';
+
+$id = trim($_GET['id'] ?? '');
+
+// Must be relative path within SCRIPTS_DIR, no traversal, must end in .sh or .md
+if (!$id || str_contains($id, '..') || !preg_match('/^[A-Za-z0-9_.\-\/]+\.(sh|md)$/', $id)) {
+    echo json_encode(['ok' => false, 'error' => 'Invalid id']);
+    exit;
+}
+
+$path = SCRIPTS_DIR . '/' . $id;
+if (!file_exists($path)) {
+    echo json_encode(['ok' => false, 'error' => 'Not found']);
+    exit;
+}
+
+echo json_encode(['ok' => true, 'content' => file_get_contents($path)]);