diff --git a/web/hwlab-cloud-web/app-trace.test.ts b/web/hwlab-cloud-web/app-trace.test.ts
index 3d55e62f..d66c085b 100644
--- a/web/hwlab-cloud-web/app-trace.test.ts
+++ b/web/hwlab-cloud-web/app-trace.test.ts
@@ -121,6 +121,30 @@ test("trace display rows suppress low-value AgentRun backend noise", () => {
   assert.match(text, /当前可见 1 个 device-pod/u);
 });
 
+test("trace display rows collapse successful assistant-only AgentRun turns", () => {
+  const events = [
+    event(1, "agentrun:request:accepted", { message: "accepted" }),
+    event(2, "agentrun:run:reused"),
+    event(3, "agentrun:command:created"),
+    event(4, "agentrun:runner-job:reused"),
+    event(5, "agentrun:backend:codex-app-server:reused"),
+    event(6, "agentrun:backend:turn/start:completed"),
+    event(7, "agentrun:assistant:message", {
+      type: "assistant",
+      status: "completed",
+      terminal: true,
+      message: "HWLAB663_FINAL_T2_OK"
+    }),
+    event(8, "agentrun:terminal:completed", { type: "result", terminal: true, status: "completed" })
+  ];
+
+  const rows = traceDisplayRows({ traceId: "trc_agentrun_assistant_only", events }, events);
+  assert.equal(rows.length, 1);
+  assert.equal(rows[0].tone, "ok");
+  assert.match(rows[0].header, /助手最后一条消息/u);
+  assert.match(rows[0].body ?? "", /HWLAB663_FINAL_T2_OK/u);
+});
+
 function traceEvents() {
   return [
     event(1, "request:accepted", { promptSummary: "请检查 trace" }),
diff --git a/web/hwlab-cloud-web/app-trace.ts b/web/hwlab-cloud-web/app-trace.ts
index d152db57..872a58da 100644
--- a/web/hwlab-cloud-web/app-trace.ts
+++ b/web/hwlab-cloud-web/app-trace.ts
@@ -289,6 +289,7 @@ export function traceDisplayRows(trace, events) {
   const commandGroups = traceCommandExecutionGroups(events);
   const requestEvent = tracePrimaryRequestEvent(events);
   const hasTerminalAssistant = events.some((event) => isTerminalAssistantTraceEvent(event));
+  const terminalAssistantOnly = hasTerminalAssistant && !events.some((event) => isCommandExecutionTraceEvent(event));
   const renderedCommands = new Set();
   let requestRendered = false;
   let setupRendered = false;
@@ -315,6 +316,7 @@ export function traceDisplayRows(trace, events) {
       continue;
     }
     if (isRequestTraceEvent(event)) {
+      if (terminalAssistantOnly) continue;
       if (!requestRendered) {
         const row = traceRequestSummaryRow(trace, event, requestEvent ?? event);
         if (row) rows.push(row);
@@ -323,6 +325,7 @@ export function traceDisplayRows(trace, events) {
       continue;
     }
     if (isSetupTraceEvent(event)) {
+      if (terminalAssistantOnly) continue;
       if (!setupRendered) {
         const row = traceSetupSummaryRow(trace, events, event);
         if (row) rows.push(row);
@@ -638,7 +641,7 @@ function traceAssistantSummaryRow(trace, event, index = 0) {
   return {
     rowId: `event:${event.seq ?? `${event.label ?? event.type ?? "assistant"}:${event.createdAt ?? "unknown"}`}`,
     seq: event.seq ?? null,
-    tone: traceEventTone(event),
+    tone: terminal ? "ok" : traceEventTone(event),
     header: terminal
       ? `${traceClock(event.createdAt)}  🤖 助手最后一条消息，轮次完成（总耗时 ${elapsed}）`
       : `${traceClock(event.createdAt)}  🤖 助手消息${index === 0 ? "（第一条）" : ""}`,