scheduler: replace hint paragraph with compact 3-column legend grid

Plugin/usr/local/emhttp/plugins/varaverk/pages/scheduler.php

@@ -15,9 +15,17 @@ foreach ($tree as $orch) {
 ?>
 
 <div id="vv-scheduler">
-  <p class="vv-hint">Toggle saves immediately. Fill in cron expressions and hit
-  <strong>Save Schedule</strong> at the bottom. <strong>Run</strong> fires now;
-  <strong>Dry Run</strong> sets DRY_RUN=1. Log opens on the right.</p>
+  <div class="vv-legend">
+    <div class="vv-legend-item"><span class="vv-lk">Toggle</span><span class="vv-lv">Saves immediately — no button needed</span></div>
+    <div class="vv-legend-item"><span class="vv-lk">Cron</span><span class="vv-lv">5-field expression &nbsp;<code class="vv-lcode">*/30 * * * *</code></span></div>
+    <div class="vv-legend-item"><span class="vv-lk vv-lk-event">⚡ Badge</span><span class="vv-lv">Fires on array start or stop — not cron</span></div>
+    <div class="vv-legend-item"><span class="vv-lk">Save Schedule</span><span class="vv-lv">Writes all cron fields at once</span></div>
+    <div class="vv-legend-item"><span class="vv-lk">Run</span><span class="vv-lv">Execute now; log opens on the right</span></div>
+    <div class="vv-legend-item"><span class="vv-lk">Dry Run</span><span class="vv-lv">Same as Run with <code class="vv-lcode">DRY_RUN=1</code> — no writes</span></div>
+    <div class="vv-legend-item"><span class="vv-lk vv-lk-stop">■ Stop</span><span class="vv-lv">Kill running script and clear any stuck locks</span></div>
+    <div class="vv-legend-item"><span class="vv-lk">Verbose</span><span class="vv-lv">Pass <code class="vv-lcode">--log</code> for detailed output</span></div>
+    <div class="vv-legend-item"><span class="vv-lk">Log</span><span class="vv-lv">Open log — auto-scrolls; scroll up to pause, bottom to resume</span></div>
+  </div>
 
   <div id="vv-sched-layout">