varaverk: green checkmark feedback on schedule save

- Add .vv-save-check span to each job row (orchestrators + children)
- CSS: fade-in-then-out animation (visible 1.2s, fades over 2s)
- vvFlashSaved(job): triggers the checkmark animation on a specific row
- vvFlashStatus(el, msg, ok): shows timed status text (was called but missing)
- vvSaveJob: now shows per-job checkmark on successful save
- vvSaveAll: shows checkmark on each job as its response arrives, plus
  global "✓ All saved" / "✗ Some failed" status text below the button

Plugin/usr/local/emhttp/plugins/varaverk/css/varaverk.css

@@ -60,6 +60,12 @@
 .vv-btn-sm:hover { border-color: #888; color: #fff; }
 .vv-btn-sm.active { border-color: #4caf50; color: #4caf50; }
 
+/* Save checkmark */
+.vv-save-check { color: #4caf50; font-size: 13px; width: 14px; flex-shrink: 0;
+                 opacity: 0; text-align: center; }
+@keyframes vv-check-fade { 0%,60% { opacity: 1; } 100% { opacity: 0; } }
+.vv-save-check.vv-check-show { animation: vv-check-fade 2s forwards; }
+
 /* Running dot */
 .vv-job-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
 .vv-dot-running { background: #4caf50; animation: vv-pulse-dot 1s ease-in-out infinite; }