diff --git a/scripts/web-live-dom-probe.mjs b/scripts/web-live-dom-probe.mjs
index 2cea5db5..547219e6 100644
--- a/scripts/web-live-dom-probe.mjs
+++ b/scripts/web-live-dom-probe.mjs
@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-// SPEC: PJ2026-010401 Web工作台 - Workbench 可见性与性能探针
+// SPEC: PJ2026-01060505 Workbench Performance draft-2026-06-17-p0; PJ2026-010401 Web工作台 - Workbench 可见性与性能探针
 import { createHash } from "node:crypto";
 import { spawn } from "node:child_process";
 import fs from "node:fs";
@@ -936,7 +936,27 @@ async function collectTraceTimelineSample(page, args, index) {
     const trace = latestAgent?.querySelector(".trace-timeline") ?? null;
     const details = trace?.querySelector("details") ?? null;
     const rows = latestAgent ? [...latestAgent.querySelectorAll(".trace-render-row")] : [];
+    const rowPreview = (row) => row?.textContent?.replace(/\s+/gu, " ").trim().slice(0, 240) ?? null;
+    const rowSummary = (row) => row ? {
+      rowId: row.getAttribute("data-row-id") ?? null,
+      kind: row.getAttribute("data-row-kind") ?? null,
+      terminal: row.getAttribute("data-terminal") === "true",
+      status: row.getAttribute("data-event-status") ?? null,
+      preview: rowPreview(row)
+    } : null;
+    const isUserVisibleOutputRow = (row) => {
+      const rowId = row.getAttribute("data-row-id") ?? "";
+      const kind = row.getAttribute("data-row-kind") ?? "";
+      const text = row.textContent?.replace(/\s+/gu, " ").trim() ?? "";
+      if (kind === "tool" || rowId.startsWith("tool:")) return true;
+      if (rowId.startsWith("trace-final-response:")) return true;
+      if (/助手(?:最终)?消息|assistant (?:final )?message|final response/iu.test(text)) return true;
+      if (row.getAttribute("data-terminal") === "true" && row.querySelector(".trace-row-body")?.textContent?.trim()) return true;
+      return false;
+    };
     const latestRow = rows.at(-1) ?? null;
+    const userVisibleRows = rows.filter(isUserVisibleOutputRow);
+    const latestUserVisibleRow = userVisibleRows.at(-1) ?? null;
     const empty = latestAgent?.querySelector(".trace-empty") ?? null;
     const finalResponse = latestAgent?.querySelector(".message-final-response") ?? null;
     return {
@@ -949,7 +969,11 @@ async function collectTraceTimelineSample(page, args, index) {
       traceOpen: details instanceof HTMLDetailsElement ? details.open : null,
       rowCount: rows.length,
       emptyLabel: empty?.textContent?.replace(/\s+/gu, " ").trim() ?? null,
-      latestRowPreview: latestRow?.textContent?.replace(/\s+/gu, " ").trim().slice(0, 240) ?? null,
+      latestRowPreview: rowPreview(latestRow),
+      latestRow: rowSummary(latestRow),
+      userVisibleRowCount: userVisibleRows.length,
+      latestUserVisibleRowPreview: rowPreview(latestUserVisibleRow),
+      latestUserVisibleRow: rowSummary(latestUserVisibleRow),
       finalTextChars: finalResponse?.textContent?.trim().length ?? 0
     };
   }, index);
@@ -1057,6 +1081,7 @@ function compactSessionState(state) {
 
 function summarizeTraceRun(samples, dom, sessionSummary) {
   const firstDomRow = samples.find((sample) => Number(sample.rowCount ?? 0) > 0) ?? null;
+  const firstUserVisibleRow = samples.find((sample) => Number(sample.userVisibleRowCount ?? 0) > 0) ?? null;
   const firstRestEvent = samples.find((sample) => Number(sample.traceFetch?.eventCount ?? 0) > 0) ?? null;
   const last = samples.at(-1) ?? null;
   const failedFetches = samples.filter((sample) => sample.traceFetch && sample.traceFetch.ok !== true);
@@ -1069,8 +1094,12 @@ function summarizeTraceRun(samples, dom, sessionSummary) {
     finalAgentStatus: last?.agentStatus ?? null,
     finalTraceStatus: last?.traceStatus ?? null,
     finalDomRowCount: last?.rowCount ?? null,
+    finalUserVisibleDomRowCount: last?.userVisibleRowCount ?? null,
     firstDomRowVisibleAt: firstDomRow?.sampledAt ?? null,
     firstDomRowPreview: firstDomRow?.latestRowPreview ?? null,
+    firstUserVisibleRowAt: firstUserVisibleRow?.sampledAt ?? null,
+    firstUserVisibleRowPreview: firstUserVisibleRow?.latestUserVisibleRowPreview ?? null,
+    firstUserVisibleRow: firstUserVisibleRow?.latestUserVisibleRow ?? null,
     firstRestEventVisibleAt: firstRestEvent?.sampledAt ?? null,
     firstRestEventCount: firstRestEvent?.traceFetch?.eventCount ?? null,
     restTraceOk: samples.some((sample) => sample.traceFetch?.ok === true),
@@ -1087,8 +1116,10 @@ function summarizeProbePerformance(actions, startedAt, samples, traceSummary) {
     startedAt,
     submittedAt,
     firstDomTraceRowAt: traceSummary?.firstDomRowVisibleAt ?? null,
+    firstUserVisibleTraceRowAt: traceSummary?.firstUserVisibleRowAt ?? null,
     firstRestTraceEventAt: traceSummary?.firstRestEventVisibleAt ?? null,
     submitToFirstDomTraceRowMs: submittedAt && traceSummary?.firstDomRowVisibleAt ? Math.max(0, new Date(traceSummary.firstDomRowVisibleAt).getTime() - new Date(submittedAt).getTime()) : null,
+    submitToFirstUserVisibleTraceRowMs: submittedAt && traceSummary?.firstUserVisibleRowAt ? Math.max(0, new Date(traceSummary.firstUserVisibleRowAt).getTime() - new Date(submittedAt).getTime()) : null,
     submitToFirstRestTraceEventMs: submittedAt && traceSummary?.firstRestEventVisibleAt ? Math.max(0, new Date(traceSummary.firstRestEventVisibleAt).getTime() - new Date(submittedAt).getTime()) : null,
     totalSampleWindowMs: samples.length >= 2 ? Math.max(0, new Date(samples.at(-1).sampledAt).getTime() - new Date(samples[0].sampledAt).getTime()) : 0
   };
diff --git a/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue b/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
index 9834f27e..ede8b71b 100644
--- a/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
+++ b/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
@@ -120,7 +120,7 @@ function terminalTraceEmptyLabel(status: unknown): string {
       </summary>
       <div class="trace-disclosure-body">
         <ol ref="listRef" @scroll="onScroll">
-          <li v-for="(row, index) in readableRows" :key="rowKey(row, index)" class="trace-render-row" :data-event-status="row.tone" :data-terminal="row.terminal ? 'true' : 'false'" :data-row-kind="rowIsTool(row) ? 'tool' : 'message'">
+          <li v-for="(row, index) in readableRows" :key="rowKey(row, index)" class="trace-render-row" :data-event-status="row.tone" :data-terminal="row.terminal ? 'true' : 'false'" :data-row-kind="rowIsTool(row) ? 'tool' : 'message'" :data-row-id="row.rowId">
             <details v-if="rowIsTool(row)" class="trace-tool-details">
               <summary>
                 <code>{{ row.header }}</code>
diff --git a/web/hwlab-cloud-web/src/stores/workbench.ts b/web/hwlab-cloud-web/src/stores/workbench.ts
index 4870d994..74602e05 100644
--- a/web/hwlab-cloud-web/src/stores/workbench.ts
+++ b/web/hwlab-cloud-web/src/stores/workbench.ts
@@ -370,7 +370,48 @@ export const useWorkbenchStore = defineStore("workbench", () => {
   async function waitForPendingSessionCreate(conversationId: string): Promise<SessionCreatePersistenceResult> {
     const pending = pendingSessionCreates.get(conversationId);
     if (!pending) return { ok: true, error: null };
-    return pending;
+    const result = await pending;
+    if (result.ok) {
+      if (pendingSessionCreates.get(conversationId) === pending) pendingSessionCreates.delete(conversationId);
+      return result;
+    }
+    const recovered = await recoverPendingSessionCreate(conversationId, result.error);
+    if (recovered.ok && pendingSessionCreates.get(conversationId) === pending) pendingSessionCreates.delete(conversationId);
+    return recovered;
+  }
+
+  async function recoverPendingSessionCreate(conversationId: string, originalError: string | null): Promise<SessionCreatePersistenceResult> {
+    const normalized = normalizeWorkbenchConversationId(conversationId);
+    if (!normalized) return { ok: false, error: originalError ?? "session create failed" };
+    const selectedProjectId = activeProjectId.value;
+    const [workspaceResult, conversationResult] = await Promise.all([
+      api.workbench.workspace(selectedProjectId),
+      api.workbench.conversation(normalized, { projectId: selectedProjectId })
+    ]);
+    const workspaceSnapshot = workspaceResult.ok ? workspaceResult.data?.workspace ?? null : null;
+    const workspaceSelectedId = selectedConversationIdFromWorkspace(workspaceSnapshot);
+    const workspaceConversation = workspaceSnapshot?.selectedConversation?.conversationId === normalized ? workspaceSnapshot.selectedConversation : null;
+    const conversation = conversationResult.ok && !isArchivedConversation(conversationResult.data?.conversation) ? conversationResult.data?.conversation ?? null : null;
+    if (workspaceSelectedId !== normalized && !workspaceConversation && !conversation) {
+      return { ok: false, error: originalError ?? workspaceResult.error ?? conversationResult.error ?? "session create failed" };
+    }
+    const authoritativeConversation = conversation ?? workspaceConversation ?? visibleConversations.value.find((item) => item.conversationId === normalized) ?? null;
+    if (authoritativeConversation) {
+      rememberConversationDetail(authoritativeConversation);
+      conversations.value = mergeConversationIntoList(conversations.value, authoritativeConversation);
+    }
+    if (workspaceSnapshot && activeConversationId.value === normalized) {
+      const persistedProjectId = conversationProjectId(authoritativeConversation, selectedProjectId);
+      workspace.value = authoritativeConversation ? workspaceWithSelectedConversation(workspaceSnapshot, authoritativeConversation, persistedProjectId) : workspaceSnapshot;
+      rememberWorkspaceSnapshot(persistedProjectId, workspace.value);
+      error.value = null;
+      void hydrateTurnStatusAuthority(messages.value);
+      void hydrateTraceEvents(messages.value);
+      if (authoritativeConversation) void refreshSelectedSessionStatus(authoritativeConversation);
+      void refreshConversations(normalized);
+      restartRealtime("create-session-recovered");
+    }
+    return { ok: true, error: null };
   }
 
   function setActiveConversationSelection(conversationId: string | null | undefined): void {