fix: align all pages with design system mocks — stat cards, tables, detail panels

Dashboard: correct stat card labels (Exchanges/Success Rate/Errors/Throughput/Latency p99),
add detail text, trends, sparklines on all cards, Agent column, LIVE badge,
expanded detail panel with Agent/Correlation/Timestamp, "Open full details" link.

Agent Health: per-group meta (TPS/routes) in GroupCard header, proper HTML table
with column headers for instance list.

Agent Instance: stat card detail props (heap info, start date), scope trail with
inline status/version/routes badges.

Routes: 5th In-Flight stat card, enriched stat card props (detail/trend/sparkline),
SLA threshold line on latency chart.

Exchange Detail: Agent stat box in header.

Also: vite proxy CORS fix, cross-env dev scripts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/AgentHealth/AgentHealth.module.css

@@ -19,15 +19,54 @@
   margin-bottom: 20px;
 }
 
-.instanceRow {
+/* GroupCard meta strip */
+.groupMeta {
   display: flex;
+  gap: 16px;
   align-items: center;
-  gap: 8px;
-  padding: 8px 12px;
+  font-size: 12px;
+  color: var(--text-muted);
+}
+
+.groupMeta strong {
+  color: var(--text-primary);
+}
+
+/* Instance table */
+.instanceTable {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 12px;
+}
+
+.instanceTable thead tr {
+  border-bottom: 1px solid var(--border-subtle);
+}
+
+.instanceTable thead th {
+  padding: 6px 8px;
+  text-align: left;
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  white-space: nowrap;
+}
+
+.thStatus {
+  width: 24px;
+}
+
+.tdStatus {
+  width: 24px;
+  padding: 0 4px 0 8px;
+}
+
+.instanceRow {
   cursor: pointer;
   transition: background 0.1s;
   border-bottom: 1px solid var(--border-subtle);
-  font-size: 12px;
 }
 
 .instanceRow:last-child {
@@ -38,6 +77,15 @@
   background: var(--bg-hover);
 }
 
+.instanceRow td {
+  padding: 7px 8px;
+  vertical-align: middle;
+}
+
+.instanceRowActive {
+  background: var(--bg-selected, var(--bg-hover));
+}
+
 .instanceName {
   font-weight: 600;
   color: var(--text-primary);
@@ -49,6 +97,24 @@
   font-family: var(--font-mono);
 }
 
+.instanceError {
+  font-size: 11px;
+  color: var(--error);
+  font-family: var(--font-mono);
+}
+
+.instanceHeartbeatDead {
+  font-size: 11px;
+  color: var(--error);
+  font-family: var(--font-mono);
+}
+
+.instanceHeartbeatStale {
+  font-size: 11px;
+  color: var(--warning);
+  font-family: var(--font-mono);
+}
+
 .instanceLink {
   color: var(--text-muted);
   text-decoration: none;