ui: add manual fault reset action

docs/pro-runtime-hardening-workboard.md

@@ -279,6 +279,7 @@ Einführen eines klaren Betriebsmodells mit Fault-, Recovery- und Muted-Zuständ
 - `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.
 - Control-plane now exposes `POST /runtime/fault/reset` so operators can acknowledge `faulted` state; `TestRuntimeFaultReset*` covers the new HTTP path.
+- Control-plane UI now also offers a Danger Zone `Reset Fault` button that calls the same endpoint so operators can acknowledge faults from the dashboard.
 
 
 ## Zielzustände laut Konzept
@@ -329,6 +330,7 @@ Einführen eines klaren Betriebsmodells mit Fault-, Recovery- und Muted-Zuständ
 |---|---|---|
 | 2026-04-05 | Faulted escalation on persistent critical queue | `muted` now surfaces `RuntimeStateFaulted` when queue health stays critical and metrics capture every transition. |
 | 2026-04-05 | Manual fault reset endpoint | Added `POST /runtime/fault/reset` so operators can acknowledge `faulted` before the supervisor re-enters recovery. |
+| 2026-04-05 | Fault-reset UI shortcut | Danger Zone now hosts a Reset Fault button wired to `/runtime/fault/reset` so operators get an in-app acknowledgement path without manual HTTP calls. |
 
 ## WS-02 Verifikation
 | Datum | Fokus | Ergebnis |

internal/control/ui.html

@@ -1121,6 +1121,7 @@ input.input-error {
           <div class="actions-row" style="margin-top:0">
             <button class="danger-btn" id="danger-stop" type="button">Emergency Stop TX</button>
             <button class="danger-btn" id="danger-refresh" type="button">Hard Refresh Runtime</button>
+            <button class="danger-btn secondary" id="danger-reset-fault" type="button">Reset Fault</button>
           </div>
         </div>
       </div>
@@ -1175,6 +1176,7 @@ const state = {
   dirty: new Set(),
   pendingRequests: 0,
   txBusy: false,
+  faultResetBusy: false,
   toggleBusy: {},
   pollersStarted: false,
   mobilePanelsApplied: false,
@@ -1489,6 +1491,26 @@ async function txAction(action) {
   }
 }
 
+async function resetFaultAction() {
+  if (state.faultResetBusy) return;
+  state.faultResetBusy = true;
+  render();
+  beginRequest();
+  try {
+    await api('/runtime/fault/reset', { method: 'POST' });
+    toast('Fault reset', 'ok');
+    log('Fault reset request accepted', 'ok');
+    await loadRuntime({ silent: true });
+  } catch (error) {
+    toast(error.message, 'err');
+    log('Fault reset failed: ' + error.message, 'err');
+  } finally {
+    state.faultResetBusy = false;
+    endRequest();
+    render();
+  }
+}
+
 function fmt(n) {
   if (n == null) return '--';
   if (n >= 1e9) return (n / 1e9).toFixed(2) + 'G';
@@ -1686,6 +1708,12 @@ function render() {
   $('btn-refresh').disabled = state.pendingRequests > 0;
   $('danger-stop').disabled = stopDisabled;
   $('danger-refresh').disabled = state.pendingRequests > 0;
+  const resetFaultBtn = $('danger-reset-fault');
+  if (resetFaultBtn) {
+    const resetDisabled = state.faultResetBusy || !state.server.runtimeOk;
+    resetFaultBtn.disabled = resetDisabled;
+    resetFaultBtn.textContent = state.faultResetBusy ? 'Resetting…' : 'Reset Fault';
+  }
 
   syncDirtyInput('freq-slider', 'frequencyMHz', (v) => typeof v === 'number' ? v.toFixed(1) : '100.0');
   syncDirtyInput('freq-num', 'frequencyMHz', (v) => typeof v === 'number' ? v.toFixed(1) : '100.0');
@@ -1901,6 +1929,7 @@ function bindInputs() {
   $('danger-stop').addEventListener('click', () => txAction('stop'));
   $('btn-refresh').addEventListener('click', manualRefresh);
   $('danger-refresh').addEventListener('click', manualRefresh);
+  $('danger-reset-fault').addEventListener('click', () => resetFaultAction());
 
   document.querySelectorAll('.toggle[data-toggle]').forEach((toggle) => {
     const key = toggle.dataset.toggle;