Add restart tips on frontend

static/styles.css

@@ -1390,4 +1390,16 @@ input[type="number"]::-webkit-inner-spin-button {
     .countdown-label {
         font-size: 0.75rem;
     }
+}
+
+/* Restart notice text styles */
+.restart-notice {
+    color: #d32f2f;
+    font-size: 1rem;
+    font-style: italic;
+    font-family: 'Calibri', sans-serif;
+    margin: 8px 0 4px;
+    padding-left: 2px;
+    line-height: 1.4;
+    opacity: 0.9;
 }