Scheduler: Run button, single card-level Save, remove per-row Save

- Run button (blue) fires script immediately, opens log panel;
  stamps log with manual run timestamp before exec
- Save moved to card footer — one button saves all cron expressions
  for the orchestrator and all its children at once
- Toggle still auto-saves immediately on flip (enable/disable is instant)
- Removed onblur from cron inputs — cron only saves on explicit Save
- api/run.php: validates id, appends timestamp, execs script in background

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

@@ -51,6 +51,17 @@
 .vv-btn-sm:hover { border-color: #888; color: #fff; }
 .vv-btn-sm.active { border-color: #4caf50; color: #4caf50; }
 
+/* Card footer */
+.vv-card-footer { display: flex; align-items: center; gap: 10px;
+                  margin-top: 12px; padding-top: 10px; border-top: 1px solid #333; }
+.vv-save-btn { padding: 5px 18px; background: #4caf50; border: none; color: #fff;
+               border-radius: 4px; cursor: pointer; font-size: 13px; }
+.vv-save-btn:hover { background: #388e3c; }
+.vv-save-status { font-size: 12px; color: #aaa; }
+.vv-run-btn { border-color: #2196f3 !important; color: #2196f3 !important; }
+.vv-run-btn:hover { background: #0d47a1 !important; color: #fff !important;
+                    border-color: #2196f3 !important; }
+
 /* Log panel */
 .vv-log-panel { margin-top: 10px; border-top: 1px solid #333; padding-top: 8px; }
 .vv-log-toolbar { display: flex; justify-content: space-between; align-items: center;