Add explicit per-plan gauge temperature offset

public/app.css

@@ -4463,3 +4463,7 @@ select.f {
  .calendar-toolbar button { padding-left:8px; padding-right:8px; }
  .calendar-toolbar select { grid-column:1 / -1; width:100%; max-width:none; }
 }
+
+.plan-temperature-offset { display:grid; grid-template-columns:minmax(180px,240px) 1fr; gap:16px; align-items:center; margin:16px 0; padding:16px; border:1px solid var(--line); border-radius:10px; background:#faf8f5; }
+.plan-temperature-offset .field-note { margin:0; line-height:1.5; }
+@media(max-width:700px) { .plan-temperature-offset { grid-template-columns:1fr; gap:10px; } }