feat(cloud): dashboard rows link to detail + desk Web Audio on critical

cloud/public/assets/app.js

@@ -55,6 +55,55 @@
     return badge;
   }
 
+  // --- desk audio alert: repeating beep while any unacknowledged critical exists ---
+  // No binary asset (air-gapped friendly): a WebAudio oscillator tone. The browser
+  // blocks audio until a user gesture, so the context is created on first click.
+  var audioCtx = null;
+  var alarmTimer = null;
+  var beepedCritical = {}; // event_id -> true; each new critical beeps once immediately
+
+  function unlockAudio() {
+    if (!audioCtx) {
+      var AC = window.AudioContext || window.webkitAudioContext;
+      if (AC) audioCtx = new AC();
+    }
+    document.removeEventListener('click', unlockAudio);
+  }
+
+  function beep() {
+    if (!audioCtx) return;
+    try {
+      var osc = audioCtx.createOscillator();
+      var gain = audioCtx.createGain();
+      osc.type = 'sine';
+      osc.frequency.value = 880;
+      gain.gain.value = 0.2;
+      osc.connect(gain);
+      gain.connect(audioCtx.destination);
+      osc.start();
+      osc.stop(audioCtx.currentTime + 0.4);
+    } catch (e) {
+      // audio unavailable; the visual list still surfaces the critical event
+    }
+  }
+
+  function updateAlarm(events) {
+    var hasUnackedCritical = false;
+    events.forEach(function (ev) {
+      var acked = ev.acknowledged_by !== null && ev.acknowledged_by !== undefined && ev.acknowledged_by !== '';
+      if (ev.severity === 'critical' && !acked) {
+        hasUnackedCritical = true;
+        if (!beepedCritical[ev.event_id]) { beepedCritical[ev.event_id] = true; beep(); }
+      }
+    });
+    if (hasUnackedCritical && !alarmTimer) {
+      alarmTimer = setInterval(beep, 3000);
+    } else if (!hasUnackedCritical && alarmTimer) {
+      clearInterval(alarmTimer);
+      alarmTimer = null;
+    }
+  }
+
   function buildRow(ev) {
     var isAcked = ev.acknowledged_by !== null && ev.acknowledged_by !== undefined && ev.acknowledged_by !== '';
 
@@ -68,7 +117,11 @@
 
     var type = document.createElement('div');
     type.className = 'event-type';
-    type.textContent = String(ev.event_type || '');
+    var typeLink = document.createElement('a');
+    typeLink.className = 'event-detail-link';
+    typeLink.href = '/events/' + encodeURIComponent(ev.event_id) + '/view';
+    typeLink.textContent = String(ev.event_type || '');
+    type.appendChild(typeLink);
     meta.appendChild(type);
 
     var sub = document.createElement('div');
@@ -118,6 +171,8 @@
       return aAcked ? 1 : -1; // unacknowledged first
     });
 
+    updateAlarm(sorted); // before any early return, so an emptied list also silences the alarm
+
     root.textContent = '';
     root.removeAttribute('aria-busy');
     if (sorted.length === 0) {
@@ -154,6 +209,8 @@
     });
   }
 
+  document.addEventListener('click', unlockAudio);
+
   loadCsrfToken();
   loadEvents();
   setInterval(loadEvents, POLL_INTERVAL_MS);