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/board.php

@@ -0,0 +1,88 @@
+<?php
+// Live board data: locks, recent errors, partner reachability.
+header('Content-Type: application/json');
+require_once dirname(__DIR__) . '/include/config.php';
+
+$out = ['ok' => true];
+
+// ── Active locks ──────────────────────────────────────────────────────────
+$lockDir = '/tmp/unraid_locks';
+$locks   = [];
+if (is_dir($lockDir)) {
+    foreach (glob($lockDir . '/*.lock') ?: [] as $lf) {
+        $name    = basename($lf, '.lock');
+        $age     = time() - (int)filemtime($lf);
+        $content = trim(file_get_contents($lf) ?: '');
+        // content is "PID:scriptname" — extract PID
+        $pid = preg_match('/^(\d+)/', $content, $pm) ? $pm[1] : '';
+        // Skip if PID is still alive (it's legitimately running)
+        if ($pid && file_exists("/proc/$pid")) continue;
+        $locks[] = ['name' => $name, 'file' => basename($lf), 'age' => $age];
+    }
+}
+$out['locks'] = $locks;
+
+// ── Recent errors ──────────────────────────────────────────────────────────
+$errors = [];
+if (is_dir(LOG_DIR)) {
+    $cutoff = time() - 7 * 86400; // only logs touched in last 7 days
+    foreach (glob(LOG_DIR . '/*.log') ?: [] as $lf) {
+        if (filemtime($lf) < $cutoff) continue;
+        $script = basename($lf, '.log');
+        $lines  = array_slice(@file($lf) ?: [], -200);
+        $lastErr = null;
+        foreach (array_reverse($lines) as $raw) {
+            // Strip ANSI escape codes
+            $clean = preg_replace('/\033\[[0-9;]*[mK]/', '', rtrim($raw));
+            if (!$clean) continue;
+            if (preg_match('/\[(?:ERROR|WARN|CRITICAL|FAILED)\]/i', $clean) ||
+                preg_match('/\b(?:ERROR|CRITICAL|FAILED):\s/i', $clean) ||
+                str_contains($clean, '✗') ||
+                (str_contains($clean, '⚠') && !str_contains($clean, '♥'))) {
+                $lastErr = mb_substr($clean, 0, 220);
+                break;
+            }
+        }
+        if ($lastErr !== null) {
+            $errors[] = ['script' => $script, 'line' => $lastErr, 'ts' => (int)filemtime($lf)];
+        }
+    }
+    usort($errors, fn($a, $b) => $b['ts'] - $a['ts']);
+}
+$out['errors'] = array_slice($errors, 0, 20);
+
+// ── Partner reachability ───────────────────────────────────────────────────
+$cacheFile = '/tmp/vv_partner_cache.json';
+$cacheTtl  = 30;
+$partnerData = null;
+
+if (file_exists($cacheFile) && (time() - (int)filemtime($cacheFile)) < $cacheTtl) {
+    $partnerData = json_decode(file_get_contents($cacheFile), true);
+} else {
+    $confRaw = vv_read_conf_raw('master.conf');
+    preg_match('/^\s*HOST1(?:_NAME)?\s*=\s*["\']?(\S+?)["\']?\s*(?:#.*)?$/m', $confRaw, $m1);
+    preg_match('/^\s*HOST2(?:_NAME)?\s*=\s*["\']?(\S+?)["\']?\s*(?:#.*)?$/m', $confRaw, $m2);
+    $host1 = $m1[1] ?? '';
+    $host2 = $m2[1] ?? '';
+    $mine  = vv_get_hostname();
+    $partnerHost = null;
+    if ($mine && $host1 && strcasecmp($mine, $host1) === 0) $partnerHost = $host2;
+    if ($mine && $host2 && strcasecmp($mine, $host2) === 0) $partnerHost = $host1;
+
+    if ($partnerHost) {
+        $start   = microtime(true);
+        $result  = shell_exec('ping -c1 -W1 ' . escapeshellarg($partnerHost) . ' 2>&1');
+        $elapsed = (int)round((microtime(true) - $start) * 1000);
+        $reached = str_contains((string)$result, '1 received')
+                || str_contains((string)$result, '1 packets received');
+        $partnerData = [
+            'host'      => $partnerHost,
+            'reachable' => $reached,
+            'latency'   => $reached ? $elapsed : null,
+        ];
+        @file_put_contents($cacheFile, json_encode($partnerData));
+    }
+}
+$out['partner'] = $partnerData;
+
+echo json_encode($out);