fix: separate sealed final response diagnostics

web/hwlab-cloud-web/scripts/workbench-e2e-server.ts

@@ -1,4 +1,4 @@
-// SPEC: PJ2026-010401 Web工作台 draft-2026-06-18-r1; PJ2026-0104010803 唯一投影 draft-2026-06-19-p0-projector-resume; PJ2026-010403 API契约 draft-2026-06-18-r1.
+// SPEC: PJ2026-010401 Web工作台 draft-2026-06-18-r1; PJ2026-0104010803 唯一投影 draft-2026-06-19-p2-terminal-sealed-final-response; PJ2026-010403 API契约 draft-2026-06-18-r1.
 // Responsibility: Same-origin fake Workbench API and static server for Playwright browser regression tests.
 
 import { createReadStream, existsSync, statSync } from "node:fs";
@@ -139,6 +139,7 @@ async function handleRequest(request: IncomingMessage, response: ServerResponse)
     const traceId = decodeURIComponent(traceMatch[1] ?? "");
     if (state.scenarioId === "completed-replay-detail-404" && traceId === "trc_completed") return json(response, 404, { ok: false, status: 404, error: { code: "trace_replay_unavailable" } });
     if (state.scenarioId === "trace-hydration-timeout-diagnostic" && traceId === "trc_trace_hydration_timeout") return json(response, 504, { ok: false, status: 504, error: { code: "trace_hydration_timeout", message: "Trace 更新超时，运行记录暂不可见。" } });
+    if (state.scenarioId === "sealed-final-response-diagnostics" && traceId === "trc_sealed_final_diag") return json(response, 504, { ok: false, status: 504, error: { code: "trace_hydration_timeout", message: "Trace 更新超时，运行记录暂不可见。" } });
     if (traceId === state.staleTraceId) return json(response, 502, { ok: false, status: 502, error: { code: "upstream_unavailable", message: "stale trace is unavailable" } });
     return json(response, 200, workbenchTracePayload(traceId, url));
   }
@@ -386,6 +387,10 @@ function createScenarioState(scenarioId: string): ScenarioState {
     sessions.unshift(traceHydrationTimeoutSession());
     traces.trc_trace_hydration_timeout = traceHydrationTimeoutTrace();
   }
+  if (id === "sealed-final-response-diagnostics") {
+    sessions.unshift(sealedFinalResponseDiagnosticSession());
+    traces.trc_sealed_final_diag = sealedFinalResponseDiagnosticTrace();
+  }
   if (id === "scroll-follow-long-trace") {
     const session = scrollFollowSession();
     sessions.unshift(session);
@@ -425,6 +430,8 @@ function createScenarioState(scenarioId: string): ScenarioState {
           ? "ses_projection_sse_error"
         : id === "trace-hydration-timeout-diagnostic"
           ? "ses_trace_hydration_timeout"
+        : id === "sealed-final-response-diagnostics"
+          ? "ses_sealed_final_diag"
         : id === "create-while-route-loading"
           ? "ses_running"
           : base.selectedSessionId;
@@ -706,6 +713,45 @@ function traceHydrationTimeoutSession(): SessionRecord {
   };
 }
 
+function sealedFinalResponseDiagnosticTrace(): JsonRecord {
+  const now = new Date().toISOString();
+  const finalText = "已完成的 sealed final response 不应被诊断覆盖。";
+  return {
+    traceId: "trc_sealed_final_diag",
+    status: "completed",
+    sessionId: "ses_sealed_final_diag",
+    threadId: "thr_sealed_final_diag",
+    turnId: "turn_sealed_final_diag",
+    events: [],
+    eventCount: 1,
+    fullTraceLoaded: false,
+    hasMore: true,
+    finalResponse: { text: finalText, status: "completed" },
+    terminalEvidence: { terminal: true, status: "completed" },
+    sealedAt: now
+  };
+}
+
+function sealedFinalResponseDiagnosticSession(): SessionRecord {
+  const now = new Date().toISOString();
+  const finalText = "已完成的 sealed final response 不应被诊断覆盖。";
+  const trace = sealedFinalResponseDiagnosticTrace();
+  return {
+    sessionId: "ses_sealed_final_diag",
+    threadId: "thr_sealed_final_diag",
+    status: "completed",
+    lastTraceId: "trc_sealed_final_diag",
+    updatedAt: now,
+    messageCount: 2,
+    firstUserMessagePreview: "sealed final response diagnostic separation",
+    turnSummary: { traceId: "trc_sealed_final_diag", status: "completed", running: false, terminal: true, sealedAt: now },
+    messages: [
+      { id: "msg_sealed_final_user", messageId: "msg_sealed_final_user", role: "user", title: "用户", text: "sealed final response diagnostic separation", status: "sent", createdAt: now, sessionId: "ses_sealed_final_diag", threadId: "thr_sealed_final_diag", turnId: "turn_sealed_final_diag" },
+      { id: "msg_sealed_final_agent", messageId: "msg_sealed_final_agent", role: "agent", title: "Code Agent", text: finalText, status: "completed", createdAt: now, updatedAt: now, sessionId: "ses_sealed_final_diag", threadId: "thr_sealed_final_diag", traceId: "trc_sealed_final_diag", turnId: "turn_sealed_final_diag", sealedAt: now, runnerTrace: trace, finalResponse: { text: finalText, status: "completed" } }
+    ]
+  };
+}
+
 function noFinalRunningTrace(): JsonRecord {
   const createdAt = new Date().toISOString();
   return {

web/hwlab-cloud-web/src/components/workbench/ConversationPanel.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
-// SPEC: PJ2026-01060505 Workbench Performance draft-2026-06-17-p0
-// Confirms Workbench message visibility after Vue render and browser paint.
+// SPEC: PJ2026-01060505 Workbench Performance draft-2026-06-17-p0; PJ2026-0104010803 唯一投影 draft-2026-06-19-p2-terminal-sealed-final-response.
+// Confirms Workbench message visibility after Vue render and keeps sealed final responses separate from diagnostics.
 
 import { computed, nextTick, onMounted, ref, watch } from "vue";
 import type { ChatMessage } from "@/types";
@@ -80,7 +80,7 @@ function isAwaitingAgentBody(message: ChatMessage): boolean {
 }
 
 function showMessageText(message: ChatMessage): boolean {
-  return !messageDiagnosticText(message) && Boolean(visibleMessageText(message));
+  return Boolean(visibleMessageText(message));
 }
 
 function messageDiagnosticText(message: ChatMessage): string | null {
@@ -132,8 +132,8 @@ function traceAutoExpanded(message: ChatMessage): boolean | null {
       </header>
       <TraceTimeline v-if="message.role === 'agent' && message.runnerTrace" :trace="message.runnerTrace" :auto-expanded="traceAutoExpanded(message)" :storage-key="traceStorageKey(message)" />
       <LoadingState v-if="isAwaitingAgentBody(message)" class="message-loading" label="思考中..." compact />
+      <MessageMarkdown v-if="showMessageText(message)" class="message-text" :source="visibleMessageText(message)" />
       <p v-if="messageDiagnosticText(message)" class="message-text projection-diagnostic">{{ messageDiagnosticText(message) }}</p>
-      <MessageMarkdown v-else-if="showMessageText(message)" class="message-text" :source="visibleMessageText(message)" />
     </article>
     <div v-if="!workbench.sessionDetailLoading && workbench.activeMessages.length === 0 && workbench.error" class="conversation-empty-hint conversation-error-hint">加载失败：{{ workbench.error }}</div>
     <div v-else-if="!workbench.sessionDetailLoading && workbench.activeMessages.length === 0" class="conversation-empty-hint">发起对话，或从左侧选择 session。</div>

web/hwlab-cloud-web/tests/workbench-e2e/specs/projection-diagnostics.spec.ts

@@ -1,3 +1,6 @@
+// SPEC: PJ2026-010401 Web工作台 draft-2026-06-18-r1; PJ2026-0104010803 唯一投影 draft-2026-06-19-p2-terminal-sealed-final-response.
+// Responsibility: Workbench diagnostic visibility regression, including separation from sealed final response.
+
 import { expect, gotoWorkbench, saveScreenshot, test } from "../fixtures/test";
 import { selectors, sessionTab } from "../fixtures/selectors";
 
@@ -42,3 +45,17 @@ test.describe("REST gap hydration errors", () => {
     await saveScreenshot(page, testInfo, "trace-hydration-timeout-visible");
   });
 });
+
+test.describe("sealed final response diagnostics separation", () => {
+  test.use({ scenarioId: "sealed-final-response-diagnostics" });
+
+  test("keeps completed final response visible while showing diagnostics separately", async ({ page }, testInfo) => {
+    await gotoWorkbench(page, "/workbench/sessions/ses_sealed_final_diag");
+    const card = page.locator(`${selectors.messageCard}[data-role="agent"][data-status="completed"]`).last();
+    await expect(card.locator(".projection-diagnostic")).toContainText("Trace 更新超时");
+    const finalResponse = card.locator(".message-text").filter({ hasText: "已完成的 sealed final response 不应被诊断覆盖。" });
+    await expect(finalResponse).toBeVisible();
+    await expect(finalResponse).not.toContainText("Trace 更新超时");
+    await saveScreenshot(page, testInfo, "sealed-final-response-diagnostic-separate");
+  });
+});