fix(workbench): cap visible timing ticker steps (#2007)

web/hwlab-cloud-web/src/composables/useWorkbenchNowTicker.ts

@@ -4,6 +4,7 @@
 import { onBeforeUnmount, readonly, ref, watch, type Ref } from "vue";
 
 const TICK_INTERVAL_MS = 1000;
+const MAX_VISIBLE_TICK_STEP_MS = TICK_INTERVAL_MS;
 
 const nowMs = ref(Date.now());
 const activeSubscribers = new Map<symbol, boolean>();
@@ -30,8 +31,18 @@ export function useWorkbenchNowTicker(enabled: Ref<boolean>) {
   return { nowMs: readonly(nowMs), refreshNow };
 }
 
-function refreshNow(): void {
-  nowMs.value = Date.now();
+function refreshNow(reset = false): void {
+  const wallNow = Date.now();
+  if (reset) {
+    nowMs.value = wallNow;
+    return;
+  }
+  const previous = Number(nowMs.value);
+  if (!Number.isFinite(previous) || wallNow <= previous) {
+    nowMs.value = wallNow;
+    return;
+  }
+  nowMs.value = Math.min(wallNow, previous + MAX_VISIBLE_TICK_STEP_MS);
 }
 
 function reconcileTimer(): void {
@@ -40,7 +51,7 @@ function reconcileTimer(): void {
   // elapsed/recent labels advance monotonically instead of jumping on resume.
   const shouldRun = isBrowser() && hasActiveSubscriber();
   if (shouldRun && timer === null) {
-    refreshNow();
+    refreshNow(true);
     timer = window.setInterval(refreshNow, TICK_INTERVAL_MS);
     return;
   }