fix(cloud): restore running session active trace (#811)

Co-authored-by: Codex Agent <codex@hwlab.local>

internal/cloud/server-code-agent-http.ts

@@ -333,6 +333,8 @@ async function updateManualSessionWorkspace({ params = {}, options = {}, session
     ? await store.getWorkspaceForUser?.({ workspaceId, ownerUserId: options.actor.id, actorRole: options.actor.role })
     : await store.getOrCreateDefaultWorkspace?.({ ownerUserId: options.actor.id, projectId });
   if (!current) return null;
+  const selectedActiveTraceId = manualSessionSelectableActiveTraceId(session);
+  const selectedLastTraceId = safeTraceId(session.lastTraceId) || selectedActiveTraceId || null;
   const updated = await store.updateWorkspace?.({
     workspaceId: current.id,
     ownerUserId: options.actor.id,
@@ -343,13 +345,14 @@ async function updateManualSessionWorkspace({ params = {}, options = {}, session
     selectedConversationId: session.conversationId,
     selectedAgentSessionId: session.id,
     selectedDevicePodId: current.selectedDevicePodId,
-    activeTraceId: null,
+    activeTraceId: selectedActiveTraceId,
     providerProfile,
     patch: {
       ...(current.workspace && typeof current.workspace === "object" ? current.workspace : {}),
       selectedConversationId: session.conversationId,
       selectedAgentSessionId: session.id,
-      activeTraceId: null,
+      activeTraceId: selectedActiveTraceId,
+      ...(selectedLastTraceId ? { lastTraceId: selectedLastTraceId } : {}),
       sessionStatus: session.status,
       threadId: safeOpaqueId(session.threadId) || null,
       providerProfile,
@@ -368,6 +371,31 @@ async function updateManualSessionWorkspace({ params = {}, options = {}, session
   return updated ?? current;
 }
 
+function manualSessionSelectableActiveTraceId(session = {}) {
+  if (!manualSessionHasRunningTraceStatus(session)) return null;
+  return safeTraceId(
+    session.currentTraceId
+      ?? session.session?.currentTraceId
+      ?? session.session?.traceId
+      ?? session.session?.runnerTrace?.traceId
+      ?? session.session?.agentRun?.traceId
+  ) || safeTraceId(session.lastTraceId) || null;
+}
+
+function manualSessionHasRunningTraceStatus(session = {}) {
+  return [
+    session.status,
+    session.session?.sessionStatus,
+    session.session?.lifecycleStatus,
+    session.session?.runnerTrace?.sessionStatus,
+    session.session?.runnerTrace?.status,
+    session.session?.agentRun?.runStatus,
+    session.session?.agentRun?.commandState,
+    session.session?.agentRun?.terminalStatus
+  ].map((value) => String(value ?? "").trim().toLowerCase().replace(/_/gu, "-"))
+    .some((value) => ["running", "busy", "pending", "creating"].includes(value));
+}
+
 function publicManualAgentSession(session) {
   if (!session || typeof session !== "object") return null;
   return {