diff --git a/tools/src/hwlab-cli/trace-renderer.ts b/tools/src/hwlab-cli/trace-renderer.ts
index a9e77d66..e1e03769 100644
--- a/tools/src/hwlab-cli/trace-renderer.ts
+++ b/tools/src/hwlab-cli/trace-renderer.ts
@@ -10,8 +10,13 @@ export interface TraceEventRow {
 }
 
 type TraceEvent = Record<string, unknown>;
+type TraceClockFormatter = (value: string) => string;
 
-export function traceDisplayRows(trace: Record<string, unknown> = {}, events: TraceEvent[] = []): TraceEventRow[] {
+export interface TraceDisplayRowsOptions {
+  formatClock?: TraceClockFormatter;
+}
+
+export function traceDisplayRows(trace: Record<string, unknown> = {}, events: TraceEvent[] = [], options: TraceDisplayRowsOptions = {}): TraceEventRow[] {
   const effectiveTrace = traceWithInferredStart(trace, events);
   const rows: TraceEventRow[] = [];
   const renderedSourceEvents = new Set<string>();
@@ -31,7 +36,7 @@ export function traceDisplayRows(trace: Record<string, unknown> = {}, events: Tr
         if (renderedToolIdentities.has(identity)) continue;
         renderedToolIdentities.add(identity);
       }
-      rows.push(traceToolCallRow(effectiveTrace, event));
+      rows.push(traceToolCallRow(effectiveTrace, event, options));
       continue;
     }
     if (isRequestTraceEvent(event)) {
@@ -41,25 +46,25 @@ export function traceDisplayRows(trace: Record<string, unknown> = {}, events: Tr
       continue;
     }
     if (isTerminalAssistantTraceEvent(event)) {
-      rows.push(traceAssistantMessageRow(effectiveTrace, event, { terminal: true }));
+      rows.push(traceAssistantMessageRow(effectiveTrace, event, { terminal: true }, options));
       continue;
     }
     if (isAssistantTraceEvent(event)) {
-      rows.push(traceAssistantMessageRow(effectiveTrace, event, { terminal: false }));
+      rows.push(traceAssistantMessageRow(effectiveTrace, event, { terminal: false }, options));
       continue;
     }
     if (isCompletionTraceEvent(event)) {
       const finalResponseText = traceFinalResponseText(effectiveTrace);
-      rows.push(finalResponseText ? traceFinalResponseRow(event, finalResponseText) : traceCompletionSummaryRow(effectiveTrace, event));
+      rows.push(finalResponseText ? traceFinalResponseRow(event, finalResponseText, options) : traceCompletionSummaryRow(effectiveTrace, event, options));
       continue;
     }
-    rows.push(traceDisplayRow(effectiveTrace, event));
+    rows.push(traceDisplayRow(effectiveTrace, event, options));
   }
-  const progressRow = traceBackendProgressSummaryRow(effectiveTrace, rows, events);
+  const progressRow = traceBackendProgressSummaryRow(effectiveTrace, rows, events, options);
   if (progressRow) rows.push(progressRow);
   if (rows.length > 0) return rows;
   if (events.length === 0) return [];
-  return events.filter((event) => !isSuppressedTraceEvent(event)).map((event) => traceDisplayRow(effectiveTrace, event));
+  return events.filter((event) => !isSuppressedTraceEvent(event)).map((event) => traceDisplayRow(effectiveTrace, event, options));
 }
 
 export function renderTraceRowsMarkdown(rows: TraceEventRow[] = []): string {
@@ -100,7 +105,7 @@ function stripTraceToolOutputFromSummary(value: string): string {
   return value.replace(/\s+(stdout:|stderr:|exitCode=).*$/isu, "").trim();
 }
 
-function traceToolCallRow(trace: Record<string, unknown>, event: TraceEvent): TraceEventRow {
+function traceToolCallRow(trace: Record<string, unknown>, event: TraceEvent, options: TraceDisplayRowsOptions): TraceEventRow {
   const command = cleanShellCommand(event.command);
   const status = traceStatusToken(event);
   const toolName = traceToolName(event, command);
@@ -109,7 +114,7 @@ function traceToolCallRow(trace: Record<string, unknown>, event: TraceEvent): Tr
     rowId: `tool:${event.itemId ?? event.seq ?? `${event.label ?? event.type ?? "tool"}:${event.createdAt ?? "unknown"}`}`,
     seq: numberOrNull(event.seq),
     tone: traceEventTone(event),
-    header: `${traceEventClock(event)} total=${formatTraceDuration(traceRelativeMs(trace, event))} ${status} ${toolName}`.trim(),
+    header: `${traceEventClock(event, options)} total=${formatTraceDuration(traceRelativeMs(trace, event))} ${status} ${toolName}`.trim(),
     body,
     preview: command ? compactTraceOneLine(command, 2000) : null,
     bodyFormat: "text"
@@ -171,7 +176,7 @@ export function traceNoiseEventCount(events: TraceEvent[] = []): number {
   return Array.isArray(events) ? events.filter((event) => isNoisyTraceEvent(event)).length : 0;
 }
 
-function traceAssistantMessageRow(trace: Record<string, unknown>, event: TraceEvent, { terminal }: { terminal: boolean }): TraceEventRow {
+function traceAssistantMessageRow(trace: Record<string, unknown>, event: TraceEvent, { terminal }: { terminal: boolean }, options: TraceDisplayRowsOptions): TraceEventRow {
   const text = cleanTraceDetailText(event.message ?? event.outputSummary ?? assistantStreamText(trace, event) ?? "");
   const index = Number.isInteger(event.messageIndex) ? Number(event.messageIndex) : null;
   const count = Number.isInteger(event.messageCount) ? Number(event.messageCount) : null;
@@ -179,19 +184,19 @@ function traceAssistantMessageRow(trace: Record<string, unknown>, event: TraceEv
     rowId: `event:${event.seq ?? `${event.label ?? event.type ?? "assistant"}:${event.createdAt ?? "unknown"}`}`,
     seq: numberOrNull(event.seq),
     tone: "ok",
-    header: `${traceEventClock(event)}  ${terminal ? "助手最终消息" : "助手消息"}${index ? ` ${index}${count ? `/${count}` : ""}` : ""}`,
+    header: `${traceEventClock(event, options)}  ${terminal ? "助手最终消息" : "助手消息"}${index ? ` ${index}${count ? `/${count}` : ""}` : ""}`,
     terminal: terminal ? true : undefined,
     body: text || null,
     bodyFormat: "markdown"
   };
 }
 
-function traceFinalResponseRow(event: TraceEvent, finalText: string): TraceEventRow {
+function traceFinalResponseRow(event: TraceEvent, finalText: string, options: TraceDisplayRowsOptions): TraceEventRow {
   return {
     rowId: `trace-final-response:${event.seq ?? "completed"}`,
     seq: numberOrNull(event.seq),
     tone: "ok",
-    header: `${traceEventClock(event)}  助手最终消息`,
+    header: `${traceEventClock(event, options)}  助手最终消息`,
     terminal: true,
     body: finalText,
     bodyFormat: "markdown"
@@ -203,17 +208,17 @@ function traceFinalResponseText(trace: Record<string, unknown>): string | null {
   return nonEmptyString(response?.text ?? response?.content ?? response?.message);
 }
 
-function traceCompletionSummaryRow(trace: Record<string, unknown>, event: TraceEvent): TraceEventRow {
+function traceCompletionSummaryRow(trace: Record<string, unknown>, event: TraceEvent, options: TraceDisplayRowsOptions): TraceEventRow {
   return {
     rowId: `trace-completion:${event.seq ?? "turn"}`,
     seq: numberOrNull(event.seq),
     tone: traceEventTone(event),
-    header: `${traceEventClock(event)}  轮次完成（总耗时 ${formatTraceDuration(traceRelativeMs(trace, event))}）`,
+    header: `${traceEventClock(event, options)}  轮次完成（总耗时 ${formatTraceDuration(traceRelativeMs(trace, event))}）`,
     body: null
   };
 }
 
-function traceNoiseSummaryRow(trace: Record<string, unknown>, events: TraceEvent[]): TraceEventRow {
+function traceNoiseSummaryRow(trace: Record<string, unknown>, events: TraceEvent[], options: TraceDisplayRowsOptions): TraceEventRow {
   const lastEvent = events.at(-1);
   const status = nonEmptyString(trace.status ?? trace.traceStatus ?? lastEvent?.status) ?? "running";
   const lastLabel = lastEvent ? readableTraceLabel(lastEvent) : "未观测";
@@ -221,13 +226,13 @@ function traceNoiseSummaryRow(trace: Record<string, unknown>, events: TraceEvent
     rowId: "trace-noise-summary",
     seq: numberOrNull(lastEvent?.seq),
     tone: lastEvent ? traceEventTone(lastEvent) : "source",
-    header: `${traceEventClock(lastEvent)}  Trace ${status}，等待可读事件`,
+    header: `${traceEventClock(lastEvent, options)}  Trace ${status}，等待可读事件`,
     body: `已隐藏 ${events.length} 条 AgentRun backend 状态事件。最新原始事件：${lastLabel}。`,
     bodyFormat: "text"
   };
 }
 
-function traceBackendProgressSummaryRow(trace: Record<string, unknown>, rows: TraceEventRow[], events: TraceEvent[]): TraceEventRow | null {
+function traceBackendProgressSummaryRow(trace: Record<string, unknown>, rows: TraceEventRow[], events: TraceEvent[], options: TraceDisplayRowsOptions): TraceEventRow | null {
   if (!Array.isArray(events) || events.length === 0) return null;
   if (rows.some((row) => row.rowId.startsWith("tool:") || /助手|轮次完成/u.test(row.header))) return null;
   const lastRenderedSeq = Math.max(0, ...rows.map((row) => row.seq ?? 0).filter(Number.isFinite));
@@ -235,16 +240,16 @@ function traceBackendProgressSummaryRow(trace: Record<string, unknown>, rows: Tr
     const seq = numberOrNull(event.seq) ?? 0;
     return seq > lastRenderedSeq && (isRequestTraceEvent(event) || isSetupTraceEvent(event) || isNoisyTraceEvent(event));
   });
-  return hiddenProgress.length > 0 ? traceNoiseSummaryRow(trace, hiddenProgress) : null;
+  return hiddenProgress.length > 0 ? traceNoiseSummaryRow(trace, hiddenProgress, options) : null;
 }
 
-function traceDisplayRow(trace: Record<string, unknown>, event: TraceEvent): TraceEventRow {
+function traceDisplayRow(trace: Record<string, unknown>, event: TraceEvent, options: TraceDisplayRowsOptions): TraceEventRow {
   const label = readableTraceLabel(event);
   return {
     rowId: `event:${event.seq ?? `${event.label ?? event.type ?? "event"}:${event.createdAt ?? "unknown"}`}`,
     seq: numberOrNull(event.seq),
     tone: traceEventTone(event),
-    header: `${traceEventClock(event)} total=${formatTraceDuration(traceRelativeMs(trace, event))} ${traceStatusToken(event)} ${label}`.trim(),
+    header: `${traceEventClock(event, options)} total=${formatTraceDuration(traceRelativeMs(trace, event))} ${traceStatusToken(event)} ${label}`.trim(),
     body: traceDisplayBody(event)
   };
 }
@@ -437,13 +442,15 @@ function traceEventTone(event: TraceEvent): TraceEventRow["tone"] {
   return "source";
 }
 
-function traceClock(value: unknown): string {
+function traceClock(value: unknown, options: TraceDisplayRowsOptions): string {
+  const timestamp = nonEmptyString(value);
+  if (timestamp && options.formatClock) return options.formatClock(timestamp);
   const date = new Date(String(value ?? ""));
   return Number.isNaN(date.getTime()) ? "--:--:--" : date.toISOString().slice(11, 19);
 }
 
-function traceEventClock(event: TraceEvent | null | undefined): string {
-  return traceClock(traceEventTimestamp(event));
+function traceEventClock(event: TraceEvent | null | undefined, options: TraceDisplayRowsOptions): string {
+  return traceClock(traceEventTimestamp(event), options);
 }
 
 function traceWithInferredStart(trace: Record<string, unknown>, events: TraceEvent[]): Record<string, unknown> {
diff --git a/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts b/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts
index 844e2c41..5ebc26e5 100644
--- a/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts
+++ b/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts
@@ -104,6 +104,16 @@ test("R1 shared trace renderer keeps completion final response at completion eve
   assert.equal(rows.some((row) => row.seq === 1 && row.terminal === true), false);
 });
 
+test("R1 shared trace renderer keeps UTC by default and lets Web supply display clock", () => {
+  const events = [{ seq: 1, label: "item/commandExecution:completed", type: "tool_call", toolName: "commandExecution", status: "completed", command: "date", createdAt: "2026-06-17T06:34:14.586Z" }];
+  const defaultRows = traceDisplayRows({ traceId: "trc_clock" }, events);
+  const displayRows = traceDisplayRows({ traceId: "trc_clock" }, events, {
+    formatClock: (value) => new Intl.DateTimeFormat("zh-CN", { timeZone: "Asia/Shanghai", hour: "2-digit", minute: "2-digit", second: "2-digit", hour12: false }).format(new Date(value))
+  });
+  assert.match(defaultRows[0]?.header ?? "", /^06:34:14 /u);
+  assert.match(displayRows[0]?.header ?? "", /^14:34:14 /u);
+});
+
 test("R1 trace API snapshots stay authoritative over compact result traces", () => {
   const previous = {
     traceId: "trc_merge",
diff --git a/web/hwlab-cloud-web/scripts/workbench-r3-live-hwpod-parity.test.ts b/web/hwlab-cloud-web/scripts/workbench-r3-live-hwpod-parity.test.ts
index 1ede8493..9312901f 100644
--- a/web/hwlab-cloud-web/scripts/workbench-r3-live-hwpod-parity.test.ts
+++ b/web/hwlab-cloud-web/scripts/workbench-r3-live-hwpod-parity.test.ts
@@ -5,6 +5,15 @@ import type { ApiResult, HwpodNodeOpsResponse, HwpodSpecsResponse, LiveProbePayl
 import { summarizeBuilds, summarizeHwpodNodeOps, summarizeProbeRows } from "../src/stores/workbench-live.ts";
 import { liveCall } from "../src/stores/workbench.ts";
 
+Object.defineProperty(globalThis, "window", {
+  configurable: true,
+  value: {
+    HWLAB_CLOUD_WEB_CONFIG: {
+      displayTime: { timeZone: "Asia/Shanghai", locale: "zh-CN", label: "北京时间" }
+    }
+  }
+});
+
 test("R3 probe summary exposes React WorkbenchProbe rows", () => {
   const summary = summarizeProbeRows(liveSurface());
   assert.equal(summary.rows.length, 3);
diff --git a/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue b/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
index a4fc2faa..54f46793 100644
--- a/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
+++ b/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
@@ -4,6 +4,7 @@ import type { RunnerTrace } from "@/types";
 import LoadingState from "@/components/common/LoadingState.vue";
 import MessageMarkdown from "@/components/workbench/MessageMarkdown.vue";
 import { useBottomFollowScroll } from "@/composables/useBottomFollowScroll";
+import { formatDisplayClock } from "@/config/runtime";
 import { traceDisplayRows, type TraceEventRow } from "../../../../../tools/src/hwlab-cli/trace-renderer.ts";
 
 const props = defineProps<{ trace?: RunnerTrace | null; defaultExpanded?: boolean; storageKey?: string; autoExpanded?: boolean | null }>();
@@ -14,7 +15,7 @@ const { following, keepBottomAfterUpdate, onScroll, scrollToBottom } = useBottom
 
 const events = computed(() => Array.isArray(props.trace?.events) ? props.trace.events : []);
 const eventCount = computed(() => props.trace?.eventCount ?? events.value.length);
-const readableRows = computed(() => traceDisplayRows(traceRecord(props.trace), events.value as Record<string, unknown>[]));
+const readableRows = computed(() => traceDisplayRows(traceRecord(props.trace), events.value as Record<string, unknown>[], { formatClock: formatDisplayClock }));
 const projectionDiagnosticLabel = computed(() => {
   const projection = props.trace?.projection ?? null;
   const health = projection?.projectionHealth ?? props.trace?.projectionHealth;
diff --git a/web/hwlab-cloud-web/src/components/workbench/MessageTraceDebugPanel.vue b/web/hwlab-cloud-web/src/components/workbench/MessageTraceDebugPanel.vue
index 4b953ed8..3d71da13 100644
--- a/web/hwlab-cloud-web/src/components/workbench/MessageTraceDebugPanel.vue
+++ b/web/hwlab-cloud-web/src/components/workbench/MessageTraceDebugPanel.vue
@@ -3,6 +3,7 @@ import { computed, ref, watch } from "vue";
 import type { ChatMessage, RunnerTrace, TraceEvent } from "@/types";
 import { firstNonEmptyString } from "@/utils";
 import { useBottomFollowScroll } from "@/composables/useBottomFollowScroll";
+import { formatDisplayClock } from "@/config/runtime";
 import { traceEventBody, traceEventLabel, traceEventMeta } from "@/components/workbench/message-rendering";
 import { traceDisplayRows, traceNoiseEventCount } from "../../../../../tools/src/hwlab-cli/trace-renderer.ts";
 
@@ -15,7 +16,7 @@ const { following, keepBottomAfterUpdate, onScroll, scrollToBottom, toggleFollow
 const trace = computed(() => props.message.runnerTrace ?? null);
 const events = computed(() => Array.isArray(trace.value?.events) ? trace.value.events : []);
 const eventCount = computed(() => trace.value?.eventCount ?? events.value.length);
-const readableRows = computed(() => traceDisplayRows(traceRecord(trace.value), events.value as Record<string, unknown>[]));
+const readableRows = computed(() => traceDisplayRows(traceRecord(trace.value), events.value as Record<string, unknown>[], { formatClock: formatDisplayClock }));
 const noiseCount = computed(() => traceNoiseEventCount(events.value as Record<string, unknown>[]));
 const lastEvent = computed(() => events.value.at(-1) ?? null);
 const lastReadableRow = computed(() => readableRows.value.at(-1) ?? null);
diff --git a/web/hwlab-cloud-web/src/config/runtime.ts b/web/hwlab-cloud-web/src/config/runtime.ts
index 23f5f110..3062a789 100644
--- a/web/hwlab-cloud-web/src/config/runtime.ts
+++ b/web/hwlab-cloud-web/src/config/runtime.ts
@@ -38,6 +38,10 @@ export function formatDisplayDateTime(value: string | Date, options: Intl.DateTi
   return new Intl.DateTimeFormat(config.locale, { hour12: false, ...dateTimeOptions, timeZone: config.timeZone }).format(date);
 }
 
+export function formatDisplayClock(value: string | Date): string {
+  return formatDisplayDateTime(value, { hour: "2-digit", minute: "2-digit", second: "2-digit" });
+}
+
 function requiredDisplayTimeField(value: unknown, field: string): string {
   if (typeof value !== "string" || value.trim().length === 0) {
     throw new Error(`HWLAB Cloud Web displayTime.${field} is required`);