Add user stats and activity tracking

frontend/app/globals.css

@@ -559,6 +559,73 @@ button span {
   margin-top: 4px;
 }
 
+.profile-grid {
+  display: grid;
+  gap: 20px;
+}
+
+.profile-section {
+  display: grid;
+  gap: 12px;
+}
+
+.stat-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
+  gap: 12px;
+}
+
+.stat-card {
+  padding: 14px;
+  border-radius: 16px;
+  border: 1px solid var(--border);
+  background: rgba(255, 255, 255, 0.05);
+  display: grid;
+  gap: 6px;
+}
+
+.stat-label {
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  color: var(--ink-muted);
+}
+
+.stat-value {
+  font-size: 20px;
+  font-weight: 700;
+}
+
+.stat-value--small {
+  font-size: 14px;
+  font-weight: 600;
+}
+
+.connection-list {
+  display: grid;
+  gap: 10px;
+}
+
+.connection-item {
+  display: flex;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 12px 14px;
+  border-radius: 14px;
+  border: 1px solid var(--border);
+  background: rgba(255, 255, 255, 0.04);
+}
+
+.connection-label {
+  font-weight: 600;
+}
+
+.connection-count {
+  font-size: 12px;
+  color: var(--ink-muted);
+  white-space: nowrap;
+}
+
 .state {
   display: grid;
   gap: 6px;
@@ -685,12 +752,28 @@ button span {
 }
 
 .user-card {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
+  display: grid;
+  grid-template-columns: 1fr auto;
+  align-items: start;
   gap: 16px;
 }
 
+.user-card strong {
+  display: block;
+  font-size: 16px;
+  margin-bottom: 6px;
+}
+
+.user-meta {
+  display: grid;
+  gap: 6px;
+  font-size: 13px;
+}
+
+.user-meta .meta {
+  display: block;
+}
+
 .user-actions {
   display: grid;
   gap: 8px;
@@ -1551,6 +1634,15 @@ button span {
   .cache-row {
     grid-template-columns: 1fr;
   }
+
+  .user-card {
+    grid-template-columns: 1fr;
+  }
+
+  .connection-item {
+    flex-direction: column;
+    align-items: flex-start;
+  }
 }
 
 @media (max-width: 480px) {