diff --git a/web/hwlab-cloud-web/src/components/workbench/WorkbenchBuildSummary.vue b/web/hwlab-cloud-web/src/components/workbench/WorkbenchBuildSummary.vue
index df00b1f0..fb2652d3 100644
--- a/web/hwlab-cloud-web/src/components/workbench/WorkbenchBuildSummary.vue
+++ b/web/hwlab-cloud-web/src/components/workbench/WorkbenchBuildSummary.vue
@@ -1,19 +1,22 @@
 <script setup lang="ts">
 import { computed, ref } from "vue";
 import StatusBadge from "@/components/common/StatusBadge.vue";
+import { displayTimeLabel } from "@/config/runtime";
 import type { LiveSurface } from "@/types";
 import { formatTimestamp, summarizeBuilds } from "@/stores/workbench-live";
 
 const props = defineProps<{ live: LiveSurface | null }>();
 const open = ref(false);
 const summary = computed(() => summarizeBuilds(props.live));
+const timeLabel = computed(() => displayTimeLabel());
+const unavailableTimeText = computed(() => `构建时间不可用（${timeLabel.value}）`);
 </script>
 
 <template>
   <section class="live-build-summary" data-live-build-summary>
     <button id="live-build-toggle" class="status-chip-button" type="button" aria-haspopup="dialog" @click="open = true">
-      <span class="status-chip-label">最新镜像构建时间</span>
-      <StatusBadge :status="summary.tone" :label="summary.latest.builtAt ? formatTimestamp(summary.latest.builtAt) : '构建时间不可用'" />
+      <span class="status-chip-label">最新镜像构建时间（{{ timeLabel }}）</span>
+      <StatusBadge :status="summary.tone" :label="summary.latest.builtAt ? formatTimestamp(summary.latest.builtAt) : unavailableTimeText" />
       <span class="status-chip-meta">{{ summary.latest.label }} · tag {{ summary.latest.tag || 'unknown' }} · commit {{ summary.latest.commitShort || 'unknown' }}</span>
     </button>
     <div v-if="open" class="workbench-dialog-backdrop" role="presentation" @click.self="open = false">
@@ -30,7 +33,7 @@ const summary = computed(() => summarizeBuilds(props.live));
           <li v-for="row in summary.rows" :key="row.key" class="live-build-row" :data-live-build-row="row.key">
             <div class="live-build-row-head">
               <strong>{{ row.label }}</strong>
-              <StatusBadge :status="row.status" :label="row.builtAt ? formatTimestamp(row.builtAt) : '构建时间不可用'" />
+              <StatusBadge :status="row.status" :label="row.builtAt ? formatTimestamp(row.builtAt) : unavailableTimeText" />
             </div>
             <div class="live-build-meta">
               <span>tag {{ row.tag || 'unknown' }}</span>
diff --git a/web/hwlab-cloud-web/src/config/runtime.ts b/web/hwlab-cloud-web/src/config/runtime.ts
index 5c177d1d..23f5f110 100644
--- a/web/hwlab-cloud-web/src/config/runtime.ts
+++ b/web/hwlab-cloud-web/src/config/runtime.ts
@@ -6,6 +6,16 @@ export interface DisplayTimeConfig {
   label: string;
 }
 
+const DEFAULT_DISPLAY_DATE_TIME_OPTIONS: Intl.DateTimeFormatOptions = {
+  year: "numeric",
+  month: "2-digit",
+  day: "2-digit",
+  hour: "2-digit",
+  minute: "2-digit",
+  second: "2-digit",
+  hour12: false
+};
+
 export function displayTimeConfig(): DisplayTimeConfig {
   const config = window.HWLAB_CLOUD_WEB_CONFIG?.displayTime;
   const timeZone = requiredDisplayTimeField(config?.timeZone, "timeZone");
@@ -24,7 +34,8 @@ export function formatDisplayDateTime(value: string | Date, options: Intl.DateTi
   const date = value instanceof Date ? value : new Date(value);
   if (!Number.isFinite(date.getTime())) return String(value);
   const config = displayTimeConfig();
-  return new Intl.DateTimeFormat(config.locale, { hour12: false, ...options, timeZone: config.timeZone }).format(date);
+  const dateTimeOptions = Object.keys(options).length > 0 ? options : DEFAULT_DISPLAY_DATE_TIME_OPTIONS;
+  return new Intl.DateTimeFormat(config.locale, { hour12: false, ...dateTimeOptions, timeZone: config.timeZone }).format(date);
 }
 
 function requiredDisplayTimeField(value: unknown, field: string): string {
diff --git a/web/hwlab-cloud-web/src/stores/workbench-live.ts b/web/hwlab-cloud-web/src/stores/workbench-live.ts
index bf9b4f70..02de84e5 100644
--- a/web/hwlab-cloud-web/src/stores/workbench-live.ts
+++ b/web/hwlab-cloud-web/src/stores/workbench-live.ts
@@ -149,7 +149,7 @@ export function formatTimestamp(value: unknown): string {
   if (!text) return "未观测";
   const date = new Date(text);
   if (!Number.isFinite(date.getTime())) return text;
-  return formatDisplayDateTime(date, { hour12: false });
+  return formatDisplayDateTime(date);
 }
 
 export function shortToken(value: unknown, size = 12): string | null {
@@ -225,7 +225,8 @@ function rowFromLiveHealth(payload: LiveProbePayload | null): BuildRow {
 }
 
 function latestBuildText(row: BuildRow): string {
-  const time = row.builtAt ? `${formatTimestamp(row.builtAt)} ${displayTimeLabel()}` : "构建时间不可用";
+  const label = displayTimeLabel();
+  const time = row.builtAt ? `${formatTimestamp(row.builtAt)} ${label}` : `构建时间不可用（${label}）`;
   return `最新镜像构建时间：${time} · ${row.label} · tag ${row.tag ?? "unknown"} · commit ${row.commitShort ?? "unknown"} · env ${row.envImageTag ?? row.envCommitShort ?? "unknown"} · revision ${row.revisionShort ?? "unknown"}`;
 }