ui: show fault telemetry in control health panel

docs/pro-runtime-hardening-workboard.md

@@ -277,6 +277,8 @@ Einführen eines klaren Betriebsmodells mit Fault-, Recovery- und Muted-Zuständ
 - `evaluateRuntimeState` now waits for a short healthy streak before leaving `muted`, logging a degraded-severity recovery event once the queue settles.
 - Persistent queue-critical streaks while `muted` now escalate to `faulted` with `FaultSeverityFaulted`, keeping `RuntimeStateFaulted` observable.
 - `EngineStats` and `txBridge` now expose transition/fault counters plus `lastFault`, surfacing the new telemetry through `/runtime`.
+- Control-plane UI now renders those WS-02 transition counters, fault count, and last-fault summary so operators can watch runtime escalations without digging through logs.
+
 
 ## Zielzustände laut Konzept
 - `idle`

internal/control/ui.html

@@ -1079,6 +1079,9 @@ input.input-error {
           <div class="health-line"><div class="name">Runtime</div><div class="val" id="health-runtime">--</div></div>
           <div class="health-line"><div class="name">Runtime Signal</div><div class="val" id="health-indicator">--</div></div>
           <div class="health-line"><div class="name">Runtime Alert</div><div class="val" id="health-alert">--</div></div>
+          <div class="health-line"><div class="name">Transitions (D/M/F)</div><div class="val" id="health-transitions">--</div></div>
+          <div class="health-line"><div class="name">Fault Count</div><div class="val" id="health-fault-count">--</div></div>
+          <div class="health-line"><div class="name">Last Fault</div><div class="val" id="health-last-fault">--</div></div>
           <div class="health-line"><div class="name">Audio Buffer</div><div class="val" id="health-audio">--</div></div>
           <div class="health-line"><div class="name">Last Update</div><div class="val" id="health-last">--</div></div>
         </div>
@@ -1782,6 +1785,43 @@ function updateHealth(engine, audioStream) {
 
   const last = Math.max(state.server.lastConfigAt || 0, state.server.lastRuntimeAt || 0);
   updateText('health-last', ageString(last));
+
+  const transitionsAvailable = engine.degradedTransitions != null || engine.mutedTransitions != null || engine.faultedTransitions != null;
+  const transitionsText = transitionsAvailable ? `${Number(engine.degradedTransitions ?? 0)} / ${Number(engine.mutedTransitions ?? 0)} / ${Number(engine.faultedTransitions ?? 0)}` : '--';
+  updateText('health-transitions', transitionsText);
+
+  const faultCountValue = engine.faultCount != null ? Number(engine.faultCount) : 0;
+  const hasFaultCount = engine.faultCount != null;
+  updateText('health-fault-count', hasFaultCount ? String(faultCountValue) : '--');
+  const faultCountEl = $('health-fault-count');
+  if (faultCountEl) {
+    faultCountEl.className = 'val' + (hasFaultCount ? (faultCountValue > 0 ? ' warn' : ' good') : '');
+  }
+
+  const lastFaultEl = $('health-last-fault');
+  const lastFault = engine.lastFault;
+  if (lastFaultEl) {
+    if (lastFault) {
+      const severity = String(lastFault.severity || '').toLowerCase();
+      const severityClass = severity === 'faulted' ? 'err' : 'warn';
+      const severityLabel = (lastFault.severity || 'Fault').toUpperCase();
+      const reasonLabel = lastFault.reason ? ` ${lastFault.reason}` : '';
+      const messageLabel = lastFault.message ? ` - ${lastFault.message}` : '';
+      let whenLabel = '';
+      if (lastFault.time) {
+        const parsed = new Date(lastFault.time);
+        if (!Number.isNaN(parsed.getTime())) {
+          whenLabel = ` @ ${parsed.toLocaleTimeString()}`;
+        }
+      }
+      const title = `${severityLabel}${reasonLabel}`;
+      updateText('health-last-fault', `${title}${messageLabel}${whenLabel}`);
+      lastFaultEl.className = 'val ' + severityClass;
+    } else {
+      lastFaultEl.className = 'val good';
+      updateText('health-last-fault', 'None');
+    }
+  }
 }
 
 function updateMeters(engine, driver, audioStream) {
@@ -2004,4 +2044,4 @@ async function init() {
 init();
 </script>
 </body>
-</html>
+</html>