fix: chart Y-axis auto-scaling, error rate unit, memory reference line, pointer events

- Throughput chart: divide totalCount by bucket duration (seconds) so Y-axis shows true msg/s instead of raw bucket counts; fixes flat-line appearance when TPS is low but totalCount is large
- Error Rate chart: convert failedCount/totalCount to percentage; change yLabel from "err/h" to "%" to match KPI stat card unit
- Memory chart: add threshold line at jvm.memory.heap.max so chart Y-axis extends to max heap and shows the reference line (spec 5.3)
- Agent state: suppress containerStatus badge when value is "UNKNOWN"; only render it with "Container: <state>" label when a non-UNKNOWN secondary state is present (spec 5.4)
- DashboardTab chartGrid: add pointer-events:none with pointer-events:auto on children so the chart grid overlay does not intercept clicks on the Application Health table rows below (spec 5.5)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/src/pages/AgentInstance/AgentInstance.tsx

@@ -66,16 +66,20 @@ export default function AgentInstance() {
     60,
   );
 
-  const chartData = useMemo(
-    () =>
-      (timeseries?.buckets || []).map((b: any) => ({
-        time: new Date(b.timestamp).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' }),
-        throughput: b.totalCount,
-        latency: b.avgDurationMs,
-        errors: b.failedCount,
-      })),
-    [timeseries],
-  );
+  const chartData = useMemo(() => {
+    const buckets: any[] = timeseries?.buckets || [];
+    // Compute bucket duration in seconds from consecutive timestamps (for msg/s conversion)
+    const bucketSecs =
+      buckets.length >= 2
+        ? (new Date(buckets[1].timestamp).getTime() - new Date(buckets[0].timestamp).getTime()) / 1000
+        : 60;
+    return buckets.map((b: any) => ({
+      time: new Date(b.timestamp).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' }),
+      throughput: bucketSecs > 0 ? b.totalCount / bucketSecs : b.totalCount,
+      latency: b.avgDurationMs,
+      errorPct: b.totalCount > 0 ? (b.failedCount / b.totalCount) * 100 : 0,
+    }));
+  }, [timeseries]);
 
   const feedEvents = useMemo<FeedEvent[]>(() => {
     const mapped = (events || [])
@@ -118,7 +122,7 @@ export default function AgentInstance() {
   const throughputSeries = useMemo(
     () =>
       chartData.length
-        ? [{ label: 'Throughput', data: chartData.map((d: any, i: number) => ({ x: i, y: d.throughput })) }]
+        ? [{ label: 'msg/s', data: chartData.map((d: any, i: number) => ({ x: i, y: d.throughput })) }]
         : null,
     [chartData],
   );
@@ -126,7 +130,7 @@ export default function AgentInstance() {
   const errorSeries = useMemo(
     () =>
       chartData.length
-        ? [{ label: 'Errors', data: chartData.map((d: any, i: number) => ({ x: i, y: d.errors })) }]
+        ? [{ label: 'Error %', data: chartData.map((d: any, i: number) => ({ x: i, y: d.errorPct })) }]
         : null,
     [chartData],
   );
@@ -229,6 +233,9 @@ export default function AgentInstance() {
             <span className={styles.scopeCurrent}>{agent.displayName}</span>
             <StatusDot variant={statusVariant} />
             <Badge label={agent.status} color={statusColor} />
+            {agent.containerStatus && agent.containerStatus !== 'UNKNOWN' && (
+              <Badge label={`Container: ${agent.containerStatus}`} variant="outlined" color="auto" />
+            )}
             {agent.version && <Badge label={agent.version} variant="outlined" color="auto" />}
             <Badge
               label={`${agent.activeRoutes ?? (agent.routeIds?.length ?? 0)}/${agent.totalRoutes ?? (agent.routeIds?.length ?? 0)} routes`}
@@ -324,7 +331,12 @@ export default function AgentInstance() {
             </span>
           </div>
           {heapSeries ? (
-            <AreaChart series={heapSeries} height={160} yLabel="MB" />
+            <AreaChart
+              series={heapSeries}
+              height={160}
+              yLabel="MB"
+              threshold={heapMax != null ? { value: heapMax / (1024 * 1024), label: 'Max Heap' } : undefined}
+            />
           ) : (
             <EmptyState title="No data" description="No heap metrics available" />
           )}
@@ -352,7 +364,7 @@ export default function AgentInstance() {
             </span>
           </div>
           {errorSeries ? (
-            <LineChart series={errorSeries} height={160} yLabel="err/h" />
+            <LineChart series={errorSeries} height={160} yLabel="%" />
           ) : (
             <EmptyState title="No data" description="No error data in range" />
           )}

ui/src/pages/DashboardTab/DashboardTab.module.css

@@ -14,6 +14,11 @@
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: 16px;
+  pointer-events: none;
+}
+
+.chartGrid > * {
+  pointer-events: auto;
 }
 
 .chartRow {