feat: add labels to nodes in monitoring

public/styles/main.css

@@ -4248,10 +4248,49 @@ html {
     font-family: 'Courier New', monospace;
 }
 
+.ip-label {
+    color: var(--text-tertiary);
+    font-size: 0.75rem;
+    font-weight: 500;
+    opacity: 0.8;
+    margin-right: 0.25rem;
+}
+
 .node-status {
     margin-bottom: 0.75rem;
 }
 
+.node-labels {
+    margin-bottom: 0.75rem;
+}
+
+.labels-container {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.35rem;
+    margin-bottom: 0.5rem;
+}
+
+.labels-divider {
+    height: 1px;
+    background: var(--border-primary);
+    margin: 0.5rem 0;
+    opacity: 0.3;
+}
+
+.label-chip {
+    display: inline-flex;
+    align-items: center;
+    font-size: 0.75rem;
+    padding: 0.25rem 0.5rem;
+    border-radius: 9999px;
+    background: rgba(30, 58, 138, 0.35);
+    border: 1px solid rgba(59, 130, 246, 0.4);
+    color: #dbeafe;
+    white-space: nowrap;
+    font-family: inherit;
+}
+
 .node-uptime {
     display: flex;
     justify-content: space-between;
@@ -4385,6 +4424,27 @@ html {
     font-weight: 600;
 }
 
+.value-label {
+    color: var(--text-secondary);
+    font-size: 0.8rem;
+    font-weight: 500;
+    opacity: 0.8;
+}
+
+.error-label {
+    color: var(--text-secondary);
+    font-size: 0.8rem;
+    font-weight: 500;
+    opacity: 0.8;
+    margin-bottom: 0.25rem;
+}
+
+.error-message {
+    color: var(--text-primary);
+    font-size: 0.875rem;
+    font-style: italic;
+}
+
 .resource-utilization {
     display: flex;
     align-items: center;