diff --git a/scripts/web-live-dom-probe.mjs b/scripts/web-live-dom-probe.mjs
index fb1f52c2..360d53e0 100644
--- a/scripts/web-live-dom-probe.mjs
+++ b/scripts/web-live-dom-probe.mjs
@@ -721,7 +721,7 @@ function freshSessionCandidate(before, after) {
 }
 
 async function realignFreshSession(page, args, sessionOrConversationId) {
-  const selected = await selectConversationViaApi(page, args, sessionOrConversationId, "web-live-dom-probe-fresh-realign").catch((error) => ({ ok: false, phase: "select-conversation", error: error instanceof Error ? error.message : String(error) }));
+  const selected = await selectSessionViaRoute(page, args, sessionOrConversationId, "web-live-dom-probe-fresh-realign").catch((error) => ({ ok: false, phase: "route-session", error: error instanceof Error ? error.message : String(error) }));
   const targetUrl = new URL(`/workbench/sessions/${encodeURIComponent(sessionOrConversationId)}`, args.url);
   targetUrl.searchParams.set("projectId", args.projectId);
   const target = targetUrl.toString();
@@ -760,29 +760,24 @@ async function waitForWorkbenchSessionRouteReady(page, args, timeoutMs) {
   return { ok: workspace.ok && commandInput.ok, timeoutMs, workspace, commandInput, dom };
 }
 
-async function selectConversationViaApi(page, args, conversationId, updatedByClient) {
-  return page.evaluate(async ({ projectId, conversationId, updatedByClient }) => {
-    const workspaceResponse = await fetch(`/v1/workbench/workspace?projectId=${encodeURIComponent(projectId)}`, { credentials: "same-origin" });
-    const workspaceBody = await workspaceResponse.json().catch(() => null);
-    const workspaceId = workspaceBody?.workspace?.workspaceId;
-    if (!workspaceId) return { ok: false, phase: "workspace", status: workspaceResponse.status, workspaceId: null, error: workspaceBody?.error ?? null };
-    const selectResponse = await fetch(`/v1/workbench/workspace/${encodeURIComponent(workspaceId)}/select-conversation`, {
-      method: "POST",
-      credentials: "same-origin",
-      headers: { "content-type": "application/json" },
-      body: JSON.stringify({ projectId, conversationId, updatedByClient })
-    });
-    const selectBody = await selectResponse.json().catch(() => null);
-    return {
-      ok: selectResponse.ok,
-      phase: "select-conversation",
-      status: selectResponse.status,
-      workspaceId,
-      conversationId: selectBody?.workspace?.selectedConversationId ?? conversationId,
-      revision: selectBody?.workspace?.revision ?? null,
-      error: selectBody?.error ?? null
-    };
-  }, { projectId: args.projectId, conversationId, updatedByClient });
+async function selectSessionViaRoute(page, args, conversationId, updatedByClient) {
+  const targetUrl = new URL(`/workbench/sessions/${encodeURIComponent(conversationId)}`, args.url);
+  const target = targetUrl.toString();
+  const navigation = await page.goto(target, { waitUntil: "domcontentloaded", timeout: Math.min(args.timeoutMs, 30000) })
+    .then((response) => ({ ok: true, status: response?.status() ?? null, url: page.url() }))
+    .catch((error) => ({ ok: false, status: null, error: error instanceof Error ? error.message : String(error), url: page.url() }));
+  const ready = await waitForWorkbenchSessionRouteReady(page, args, Math.min(args.timeoutMs, 30000));
+  return {
+    ok: navigation.ok && ready.ok,
+    phase: "route-session",
+    status: navigation.status,
+    sessionId: conversationId,
+    conversationId,
+    updatedByClient,
+    target,
+    navigation,
+    ready
+  };
 }
 
 function freshSessionAlignment(before, after) {
@@ -855,7 +850,7 @@ async function waitForSessionShellReady(page, args, actions) {
     const workspace = document.querySelector("#workspace");
     const create = document.querySelector("#session-create");
     const input = document.querySelector("#command-input");
-    return Boolean(workspace && create && !create.disabled && input && !input.disabled && statusText && !/加载中/u.test(statusText));
+    return Boolean(workspace && create && !create.disabled && input && !input.disabled && !/加载中|等待 workspace/u.test(statusText));
   }, null, { timeout: timeoutMs }).catch(() => null);
   const after = await collectSessionState(page, args);
   const result = { action: "session-shell-ready", ready: Boolean(ready), timeoutMs, before, after };
@@ -902,13 +897,15 @@ async function collectSessionState(page, args = null) {
     };
   });
   if (!args) return dom;
-  const workspace = await fetchJsonFromPage(page, `/v1/workbench/workspace?projectId=${encodeURIComponent(args.projectId)}`, { timeoutMs: 8000 });
-  const conversations = await fetchJsonFromPage(page, `/v1/agent/conversations?projectId=${encodeURIComponent(args.projectId)}`, { timeoutMs: 8000 });
+  const currentSessionId = firstNonEmpty(dom.routeConversationId, dom.activeTab?.sessionId, dom.activeTab?.conversationId);
+  const sessions = await fetchJsonFromPage(page, "/v1/workbench/sessions?limit=50", { timeoutMs: 8000 });
+  const sessionDetail = currentSessionId ? await fetchJsonFromPage(page, `/v1/workbench/sessions/${encodeURIComponent(currentSessionId)}`, { timeoutMs: 8000 }) : null;
+  const sessionMessages = currentSessionId ? await fetchJsonFromPage(page, `/v1/workbench/sessions/${encodeURIComponent(currentSessionId)}/messages`, { timeoutMs: 8000 }) : null;
   return {
     ...dom,
     api: {
-      workspace: summarizeWorkspaceFetch(workspace),
-      conversations: summarizeConversationsFetch(conversations)
+      workspace: summarizeCurrentSessionFetch(currentSessionId, sessionDetail, sessionMessages),
+      conversations: summarizeWorkbenchSessionsFetch(sessions)
     }
   };
 }
@@ -961,52 +958,65 @@ async function fetchJsonFromPage(page, requestPath, options = {}) {
   }, { requestPath, timeoutMs });
 }
 
-function summarizeWorkspaceFetch(fetchResult) {
-  const workspace = fetchResult?.json?.workspace ?? fetchResult?.json?.data?.workspace ?? null;
-  const selected = workspace?.selectedConversation ?? null;
+function summarizeCurrentSessionFetch(sessionId, detailFetch, messagesFetch) {
+  const detailBody = detailFetch?.json?.session ?? detailFetch?.json?.data?.session ?? detailFetch?.json?.data ?? detailFetch?.json ?? null;
+  const messages = messagesFromFetch(messagesFetch);
+  const latestMessage = messages.at(-1) ?? null;
   return {
-    ok: fetchResult?.ok === true,
-    path: fetchResult?.path ?? null,
-    status: fetchResult?.status ?? null,
-    error: fetchResult?.error ?? null,
-    bodyPreview: fetchResult?.ok === true ? null : fetchResult?.bodyPreview ?? null,
-    workspaceId: workspace?.workspaceId ?? null,
-    projectId: normalizeProbeProjectId(workspace?.projectId) ?? null,
-    revision: workspace?.revision ?? null,
-    selectedConversationId: workspace?.selectedConversationId ?? selected?.conversationId ?? null,
-    selectedAgentSessionId: workspace?.selectedAgentSessionId ?? selected?.sessionId ?? null,
-    activeTraceId: workspace?.activeTraceId ?? selected?.lastTraceId ?? null,
-    selectedConversationStatus: selected?.status ?? workspace?.sessionStatus ?? null,
-    selectedMessagesCount: Array.isArray(selected?.messages) ? selected.messages.length : selected?.messagesCount ?? null
+    ok: detailFetch?.ok === true || messagesFetch?.ok === true,
+    path: detailFetch?.path ?? messagesFetch?.path ?? null,
+    status: detailFetch?.status ?? messagesFetch?.status ?? null,
+    error: detailFetch?.error ?? messagesFetch?.error ?? null,
+    bodyPreview: detailFetch?.ok === true || messagesFetch?.ok === true ? null : detailFetch?.bodyPreview ?? messagesFetch?.bodyPreview ?? null,
+    workspaceId: null,
+    projectId: normalizeProbeProjectId(detailBody?.projectId) ?? null,
+    revision: detailBody?.revision ?? detailBody?.updatedAt ?? null,
+    selectedConversationId: firstNonEmpty(detailBody?.sessionId, detailBody?.id, sessionId),
+    selectedAgentSessionId: firstNonEmpty(detailBody?.sessionId, detailBody?.id, sessionId),
+    activeTraceId: firstNonEmpty(detailBody?.lastTraceId, detailBody?.traceId, latestMessage?.traceId, latestMessage?.runnerTrace?.traceId),
+    selectedConversationStatus: detailBody?.status ?? detailBody?.state ?? latestMessage?.status ?? null,
+    selectedMessagesCount: messages.length
   };
 }
 
-function summarizeConversationsFetch(fetchResult) {
-  const conversations = Array.isArray(fetchResult?.json?.conversations)
-    ? fetchResult.json.conversations
-    : Array.isArray(fetchResult?.json?.data?.conversations)
-      ? fetchResult.json.data.conversations
-      : [];
+function summarizeWorkbenchSessionsFetch(fetchResult) {
+  const sessions = sessionsFromFetch(fetchResult);
   return {
     ok: fetchResult?.ok === true,
     path: fetchResult?.path ?? null,
     status: fetchResult?.status ?? null,
     error: fetchResult?.error ?? null,
     bodyPreview: fetchResult?.ok === true ? null : fetchResult?.bodyPreview ?? null,
-    count: conversations.length,
-    items: conversations.slice(0, 16).map((item) => ({
-      conversationId: item?.conversationId ?? null,
+    count: sessions.length,
+    items: sessions.slice(0, 16).map((item) => ({
+      conversationId: firstNonEmpty(item?.sessionId, item?.id),
       projectId: normalizeProbeProjectId(item?.projectId) ?? null,
-      sessionId: item?.sessionId ?? null,
+      sessionId: firstNonEmpty(item?.sessionId, item?.id),
       threadId: item?.threadId ?? null,
       status: item?.status ?? null,
-      messagesCount: Array.isArray(item?.messages) ? item.messages.length : item?.messagesCount ?? null,
-      lastTraceId: item?.lastTraceId ?? null,
+      messagesCount: Array.isArray(item?.messages) ? item.messages.length : item?.messagesCount ?? item?.messageCount ?? null,
+      lastTraceId: firstNonEmpty(item?.lastTraceId, item?.traceId),
       updatedAt: item?.updatedAt ?? null
     }))
   };
 }
 
+function sessionsFromFetch(fetchResult) {
+  if (Array.isArray(fetchResult?.json?.sessions)) return fetchResult.json.sessions;
+  if (Array.isArray(fetchResult?.json?.data?.sessions)) return fetchResult.json.data.sessions;
+  if (Array.isArray(fetchResult?.json?.items)) return fetchResult.json.items;
+  if (Array.isArray(fetchResult?.json?.data?.items)) return fetchResult.json.data.items;
+  return [];
+}
+
+function messagesFromFetch(fetchResult) {
+  if (Array.isArray(fetchResult?.json?.messages)) return fetchResult.json.messages;
+  if (Array.isArray(fetchResult?.json?.data?.messages)) return fetchResult.json.data.messages;
+  if (Array.isArray(fetchResult?.json?.items)) return fetchResult.json.items;
+  if (Array.isArray(fetchResult?.json?.data?.items)) return fetchResult.json.data.items;
+  return [];
+}
+
 async function submitPrompt(page, args, actions) {
   const readyBefore = await waitForCommandReady(page, args, actions);
   const fresh = [...actions].reverse().find((item) => item.action === "fresh-session") ?? null;
@@ -1280,7 +1290,7 @@ function classifyRunProbeError(error, context = {}) {
   const login = failureDom.login && typeof failureDom.login === "object" ? failureDom.login : {};
   if (/\/login(?:\?|$)/u.test(finalUrl) || failureDom.authState === "login" || login.cardVisible === true) return "auth-redirect-login";
   if (/session_required|session-not-selected/u.test(message)) return "session-not-selected";
-  if (/pre-submit-realign|session-(?:route|workspace|active-tab)-not-aligned|select-conversation/u.test(message)) return "session-not-selected";
+  if (/pre-submit-realign|session-(?:route|workspace|active-tab)-not-aligned|route-session/u.test(message)) return "session-not-selected";
   if (/composer|command-send|command bar|disabledReason|button_disabled/u.test(message)) return "composer-disabled";
   if (/fresh session/u.test(message)) return "fresh-session-not-aligned";
   if (/agent final response did not reach terminal DOM state/u.test(message)) return "agent-terminal-timeout";
@@ -1341,66 +1351,21 @@ async function collectCommandState(page) {
 }
 
 async function selectConversationInBrowserSession(page, args, actions) {
-  const result = await page.evaluate(async ({ projectId, conversationId }) => {
-    const summarizeAuthSession = (body) => ({
+  const authSession = await page.evaluate(async () => {
+    const response = await fetch("/auth/session", { credentials: "same-origin" });
+    const body = await response.json().catch(() => null);
+    return {
+      status: response.status,
       authenticated: body?.authenticated ?? null,
       userId: body?.user?.id ?? body?.actor?.id ?? null,
       username: body?.user?.username ?? body?.actor?.username ?? null,
       role: body?.user?.role ?? body?.actor?.role ?? null,
-      status: body?.user?.status ?? body?.actor?.status ?? null
-    });
-    const summarizeWorkspace = (workspace) => workspace ? {
-      workspaceId: workspace.workspaceId ?? null,
-      ownerUserId: workspace.ownerUserId ?? null,
-      projectId: workspace.projectId ?? null,
-      selectedConversationId: workspace.selectedConversationId ?? null,
-      selectedAgentSessionId: workspace.selectedAgentSessionId ?? null,
-      selectedConversationStatus: workspace.selectedConversation?.status ?? null,
-      selectedMessagesCount: workspace.selectedConversation?.messages?.length ?? workspace.selectedConversation?.messagesCount ?? null,
-      revision: workspace.revision ?? null
-    } : null;
-    const sessionResponse = await fetch("/auth/session", { credentials: "same-origin" });
-    const sessionBody = await sessionResponse.json().catch(() => null);
-    const workspaceResponse = await fetch(`/v1/workbench/workspace?projectId=${encodeURIComponent(projectId)}`, { credentials: "same-origin" });
-    const workspaceBody = await workspaceResponse.json().catch(() => null);
-    const workspaceId = workspaceBody?.workspace?.workspaceId;
-    if (!workspaceId) return {
-      ok: false,
-      phase: "workspace",
-      status: workspaceResponse.status,
-      workspaceId: null,
-      authSession: summarizeAuthSession(sessionBody),
-      workspace: summarizeWorkspace(workspaceBody?.workspace),
-      bodyStatus: workspaceBody?.status ?? null,
-      error: workspaceBody?.error ?? null
+      accountStatus: body?.user?.status ?? body?.actor?.status ?? null
     };
-    const selectResponse = await fetch(`/v1/workbench/workspace/${encodeURIComponent(workspaceId)}/select-conversation`, {
-      method: "POST",
-      credentials: "same-origin",
-      headers: { "content-type": "application/json" },
-      body: JSON.stringify({ projectId, conversationId, updatedByClient: "web-live-dom-probe" })
-    });
-    const selectBody = await selectResponse.json().catch(() => null);
-    return {
-      ok: selectResponse.ok,
-      phase: "select-conversation",
-      status: selectResponse.status,
-      workspaceId,
-      authSession: summarizeAuthSession(sessionBody),
-      workspace: summarizeWorkspace(workspaceBody?.workspace),
-      responseStatus: selectBody?.status ?? null,
-      error: selectBody?.error ?? null,
-      conversationId: selectBody?.workspace?.selectedConversationId ?? conversationId,
-      selectedMessageCount: selectBody?.workspace?.selectedConversation?.messages?.length ?? selectBody?.workspace?.selectedConversation?.messagesCount ?? null,
-      sessionStatus: selectBody?.workspace?.selectedConversation?.status ?? selectBody?.workspace?.sessionStatus ?? null
-    };
-  }, { projectId: args.projectId, conversationId: args.conversationId });
-  actions.push({ action: "select-conversation", ...result });
-  if (!result.ok) throw new Error(`browser session select-conversation failed: ${JSON.stringify(result)}`);
-  await page.reload({ waitUntil: "domcontentloaded", timeout: args.timeoutMs });
-  await waitForAuthBootstrap(page, args, actions);
-  await page.locator("#workspace").waitFor({ state: "visible", timeout: args.timeoutMs });
-  await page.locator("#command-input").waitFor({ state: "visible", timeout: args.timeoutMs });
+  });
+  const result = await selectSessionViaRoute(page, args, args.conversationId, "web-live-dom-probe");
+  actions.push({ action: "select-session", authSession, ...result });
+  if (!result.ok) throw new Error(`browser session route selection failed: ${JSON.stringify(result)}`);
 }
 
 async function waitForMessageCards(page, args, actions) {
@@ -1471,19 +1436,27 @@ async function collectDomEvidence(page, args) {
     const workspace = document.querySelector("#workspace");
     const list = document.querySelector("#conversation-list");
     const cards = [...document.querySelectorAll(".message-card")];
-    const conversationResponse = await fetch(`/v1/agent/conversations?projectId=${encodeURIComponent(projectId)}`, { credentials: "same-origin" }).catch(() => null);
-    const conversationBody = conversationResponse ? await conversationResponse.json().catch(() => null) : null;
-    const conversations = Array.isArray(conversationBody?.conversations) ? conversationBody.conversations : [];
+    const sessionsResponse = await fetch("/v1/workbench/sessions?limit=50", { credentials: "same-origin" }).catch(() => null);
+    const sessionsBody = sessionsResponse ? await sessionsResponse.json().catch(() => null) : null;
+    const sessions = Array.isArray(sessionsBody?.sessions)
+      ? sessionsBody.sessions
+      : Array.isArray(sessionsBody?.data?.sessions)
+        ? sessionsBody.data.sessions
+        : Array.isArray(sessionsBody?.items)
+          ? sessionsBody.items
+          : Array.isArray(sessionsBody?.data?.items)
+            ? sessionsBody.data.items
+            : [];
     const sessionTabs = [...document.querySelectorAll("#session-tabs .session-tab")];
     const activeSessionTab = sessionTabs.find((item) => item.getAttribute("data-active") === "true") ?? null;
     const routeMatch = window.location.pathname.match(/\/workbench\/sessions\/([^/]+)/u) ?? window.location.pathname.match(/\/workspace\/sessions\/([^/]+)/u);
-    const sessionIds = conversations.map((item) => item?.sessionId).filter((value) => typeof value === "string" && value).slice(0, 8);
-    const conversationTraceIds = conversations.map((item) => item?.lastTraceId).filter((value) => typeof value === "string" && value);
+    const sessionIds = sessions.map((item) => item?.sessionId ?? item?.id).filter((value) => typeof value === "string" && value).slice(0, 8);
+    const sessionTraceIds = sessions.map((item) => item?.lastTraceId ?? item?.traceId).filter((value) => typeof value === "string" && value);
     const domTraceIds = cards.map((card) => {
       const trace = card.querySelector(".trace-timeline, .message-trace");
       return firstTraceId(card.getAttribute("data-trace-id"), trace?.getAttribute("data-trace-id"), trace?.getAttribute("data-traceid"), card.textContent, trace?.textContent, document.querySelector(".composer-mode")?.textContent);
     }).filter((value) => typeof value === "string" && value);
-    const traceIds = [...new Set([...conversationTraceIds, ...domTraceIds])].slice(0, 8);
+    const traceIds = [...new Set([...sessionTraceIds, ...domTraceIds])].slice(0, 8);
     const scroll = workspace ? {
       scrollTop: Math.round(workspace.scrollTop),
       scrollHeight: Math.round(workspace.scrollHeight),
@@ -1516,8 +1489,8 @@ async function collectDomEvidence(page, args) {
         titles: sessionTabs.map((item) => item.querySelector("strong")?.textContent?.trim() ?? "").slice(0, 8),
         sessionIds,
         traceIds,
-        conversationsStatus: conversationResponse?.status ?? null,
-        conversationsCount: conversations.length
+        sessionsStatus: sessionsResponse?.status ?? null,
+        sessionsCount: sessions.length
       },
       messageCount: cards.length,
       messageRoles: cards.map((card) => cardRole(card) ?? "unknown"),
@@ -1578,7 +1551,7 @@ function observeBootstrapRoutes(page) {
   page.on("request", (request) => {
     try {
       const url = new URL(request.url());
-      if (!["/auth/bootstrap", "/auth/session", "/auth/workspace-bootstrap", "/v1/workbench/workspace"].includes(url.pathname)) return;
+      if (!["/auth/bootstrap", "/auth/session", "/auth/workspace-bootstrap", "/v1/workbench/sessions"].includes(url.pathname)) return;
       routes.push({ method: request.method(), path: url.pathname });
     } catch {
       // Ignore malformed browser-internal URLs.
@@ -1592,7 +1565,7 @@ function summarizeBootstrapRoutes(routes) {
   return {
     authBootstrapRequested: paths.includes("/auth/bootstrap"),
     authSessionRequested: paths.includes("/auth/session"),
-    workbenchWorkspaceRequested: paths.includes("/v1/workbench/workspace"),
+    workbenchSessionsRequested: paths.includes("/v1/workbench/sessions"),
     legacyWorkspaceBootstrapRequested: paths.includes("/auth/workspace-bootstrap"),
     routes: routes.slice(0, 20)
   };