diff --git a/apps/presentation/dashboard/package.json b/apps/presentation/dashboard/package.json
index d9cda41712..7e125f4cbc 100644
--- a/apps/presentation/dashboard/package.json
+++ b/apps/presentation/dashboard/package.json
@@ -22,7 +22,7 @@
     "smoke:benchmark-study-browser": "node ../../../examples/dashboard-benchmark-study-browser-smoke.mjs",
     "smoke:capability-configuration": "rm -rf node_modules/.cache/loopx-capability-configuration-smoke && tsc --ignoreConfig --target ES2022 --module NodeNext --moduleResolution NodeNext --types node --skipLibCheck --strict --outDir node_modules/.cache/loopx-capability-configuration-smoke smoke/capability-configuration-smoke.ts src/data/capability-configuration.ts && node node_modules/.cache/loopx-capability-configuration-smoke/smoke/capability-configuration-smoke.js",
     "smoke:chat-model-menu": "vite build --ssr smoke/chat-model-menu-smoke.mjs --outDir node_modules/.cache/chat-model-menu --emptyOutDir && node node_modules/.cache/chat-model-menu/chat-model-menu-smoke.js",
-    "smoke:chat-route": "tsc --ignoreConfig --target ES2022 --module ES2022 --moduleResolution Bundler --ignoreDeprecations 6.0 --skipLibCheck --strict --rootDir ../../.. --outDir node_modules/.cache/loopx-chat-route-smoke smoke/chat-route-smoke.ts src/data/chat-model.ts src/vite-env.d.ts && node node_modules/.cache/loopx-chat-route-smoke/apps/presentation/dashboard/smoke/chat-route-smoke.js",
+    "smoke:chat-route": "vite build --ssr smoke/chat-route-smoke.ts --outDir node_modules/.cache/loopx-chat-route-smoke --emptyOutDir && node node_modules/.cache/loopx-chat-route-smoke/chat-route-smoke.js",
     "smoke:chat-stream-stall": "vite build --ssr smoke/chat-stream-stall-smoke.ts --outDir node_modules/.cache/loopx-chat-stream-stall --emptyOutDir && node node_modules/.cache/loopx-chat-stream-stall/chat-stream-stall-smoke.js",
     "smoke:chat-turn-acceptance-retry": "vite build --ssr smoke/chat-turn-acceptance-retry-smoke.ts --outDir node_modules/.cache/loopx-chat-turn-acceptance-retry --emptyOutDir && node node_modules/.cache/loopx-chat-turn-acceptance-retry/chat-turn-acceptance-retry-smoke.js",
     "smoke:demo-readiness": "bash ../../../scripts/loopx-python.sh --exec ../../../examples/dashboard-demo-readiness-smoke.py",
diff --git a/apps/presentation/dashboard/smoke/chat-route-smoke.ts b/apps/presentation/dashboard/smoke/chat-route-smoke.ts
index e30b7f46ca..937501ba86 100644
--- a/apps/presentation/dashboard/smoke/chat-route-smoke.ts
+++ b/apps/presentation/dashboard/smoke/chat-route-smoke.ts
@@ -569,6 +569,24 @@ async function checkSessionHistoryRecoveryContract() {
         === "message-old,message-new",
       "messages from multiple local sessions should retain chronological order",
     );
+    const tied = historySnapshot("session-tied", "ready", [
+      { message_id: "z-request", turn_id: null, role: "user", text: "Original question", created_at: "2026-08-10T02:00:00Z" },
+      { message_id: "a-answer", turn_id: null, role: "agent", text: "完整正文".repeat(3000), created_at: "2026-08-10T02:00:00Z" },
+      { message_id: "m-repeat", turn_id: null, role: "user", text: "Original question", created_at: "2026-08-10T02:00:00Z" },
+    ]);
+    const sameIdElsewhere = historySnapshot("session-other", "ready", [
+      { ...tied.messages[0], text: "Other session" },
+    ]);
+    const ordered = mergeChatSessionMessages([tied, sameIdElsewhere, tied]);
+    check(ordered.filter(row => row.session_id === "session-tied").map(row => row.message_id).join(",")
+      === "z-request,a-answer,m-repeat", "Timestamp ties must retain the original Session's append order, not random ID order");
+    check(ordered.find(row => row.message_id === "a-answer")?.text === tied.messages[1].text,
+      "History ordering must retain the full long answer");
+    check(ordered.length === 4 && ordered.filter(row => row.text === "Original question").length === 2,
+      "Deduplicate only exact stored identities; repeated bodies and colliding cross-session IDs remain");
+    check(mergeChatSessionMessages([sameIdElsewhere, tied]).map(row => `${row.session_id}:${row.message_id}`).join("|")
+      === ordered.map(row => `${row.session_id}:${row.message_id}`).join("|"), "Equal-time cross-session ordering is stable across read completion order");
+
   } finally {
     globalThis.fetch = originalFetch;
   }
diff --git a/apps/presentation/dashboard/src/data/chat.ts b/apps/presentation/dashboard/src/data/chat.ts
index 33fcd85cc9..05331962ca 100644
--- a/apps/presentation/dashboard/src/data/chat.ts
+++ b/apps/presentation/dashboard/src/data/chat.ts
@@ -1025,9 +1025,12 @@ export function mergeChatSessionMessages(snapshots: ChatSessionSnapshot[]) {
       messages.set(`${snapshot.session.session_id}:${message.message_id}`, { ...message, session_id: snapshot.session.session_id });
     }
   }
+  // Store rows are append-ordered; opaque IDs cannot break timestamp ties.
+  // Stable sort retains that order within a Session, with a deterministic tie
+  // across Sessions even when their snapshots finish in a different order.
   return [...messages.values()].sort((left, right) =>
     left.created_at.localeCompare(right.created_at)
-      || left.message_id.localeCompare(right.message_id)
+      || (left.session_id ?? "").localeCompare(right.session_id ?? "")
   );
 }
 
diff --git a/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.md b/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.md
index bf3a4d4e7d..1813940400 100644
--- a/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.md
+++ b/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.md
@@ -1288,6 +1288,16 @@ unreadable current Session blocks ordinary send until its exact record recovers;
 never infer an empty conversation or create a replacement driver from a read
 failure. A recovered read does not prove receiver adoption or native GQ02/GQ09.
 
+Equal-timestamp messages retain the original Session's append order: opaque
+message IDs are identity, not chronology. The shared history merge preserves
+complete bodies and repeated text, deduplicates only the same Session/message
+identity, and uses a deterministic Session tie across independent snapshots.
+Browser recovery waits for asynchronous hydration and for the held stale reader
+to settle, including an aborted request; it does not require a response from an
+already timed-out fetch. [Synthetic source-order captures](../../assets/personal-workspace/conversation-history/README.md)
+qualify this read/display boundary, not full history pagination, reply threading
+or installed App/Lark bidirectional delivery.
+
 Following the newest reply also survives a resized viewport or timeline, including
 image layout and expanded replies, without waiting for another message. Scrolling
 up keeps the reader in history across layout changes; the existing latest-message
diff --git a/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.zh-CN.md b/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.zh-CN.md
index b60789ae40..f6effbe558 100644
--- a/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.zh-CN.md
+++ b/docs/architecture/rfcs/app-conversation-and-async-inbox-v0.zh-CN.md
@@ -959,6 +959,13 @@ App 历史与重连读取同一条消息；managed 和 attached 完成存储均
 
 [公开模型评测](../../../examples/evaluations/chat-intake.py) 仅在 release 候选版本验收时显式启用付费调用，默认及新增宣传的模型配置分别至少重复两次。平时 PR、每次提交和 heartbeat 只跑离线回归及受影响的浏览器场景，不运行付费评测。记录候选版本，保留失败；凭证不可用记为跳过，不视为通过。评测使用生产 prompt/parser 和固定公开上下文，覆盖新建、已有负责人、多候选、停止/无授权、纠偏、当前 Goal 追问、引用、否定、普通问答与中英文表达。冲突操作、协议缺失、生成截断均记录为失败。记录模型、prompt/用例哈希、请求参数、token 用量和重复次数，不泄露凭证。该层只验证模型解释已提供证据，不证明真实发现、派发、停止执行或完整 GQ01/GQ02；打包浏览器和实际委派传输测试分别覆盖其边界。
 
+时间戳相同的消息保留原 Session 的追加顺序；随机消息 ID 只标识身份，不表示时间。
+共享历史合并保留完整正文与重复文本，只按同一 Session／消息身份去重；独立快照时间
+相同时按 Session 确定显示顺序，避免读取完成先后影响排序。浏览器恢复检查等待异步
+回填及被挂起的旧读取结束，允许旧请求已经超时，不再强求已取消请求的响应。
+[合成顺序截图](../../assets/personal-workspace/conversation-history/README.md)只验收该读取／显示边界，
+完整历史分页、回复线程和已安装 App／飞书双向送达仍分别验收。
+
 同一对话界面在用户停留底部时跟随输出，上翻阅读后保持位置，并提供回到最新消息的入口。
 窗口或时间线尺寸变化（包括图片布局与展开回复）后仍应跟随最新回复，不必等待下一条消息。
 用户上翻阅读时，布局变化保留当前位置；既有回到最新消息按钮恢复跟随。该行为留在共享
diff --git a/docs/assets/personal-workspace/conversation-history/README.md b/docs/assets/personal-workspace/conversation-history/README.md
new file mode 100644
index 0000000000..df2e1f36e3
--- /dev/null
+++ b/docs/assets/personal-workspace/conversation-history/README.md
@@ -0,0 +1,15 @@
+# Conversation history source order
+
+Synthetic local fixtures only; no private conversation, account or credentials.
+The desktop captures use 1512 × 982; the narrow capture uses 390 × 844.
+
+- [Before](before-desktop.png): opaque message-ID sorting puts the answer before its same-second question.
+- [After](after-desktop.png): the Session append order keeps the question before its answer.
+- [Narrow](after-narrow.png): the same source order remains readable at 390 px.
+
+The existing conversation-history-recovery scenario also exercises failed older
+reads, draft retention, current-session send blocking, projection rehydration,
+retired observers and zero replay. The chat-route smoke checks complete long
+bodies, repeated text, scoped identity and deterministic cross-session ties.
+This qualifies source/display order and synthetic recovery, not complete
+pagination, reply threading, native input or real App/Lark media delivery.
diff --git a/docs/assets/personal-workspace/conversation-history/after-desktop.png b/docs/assets/personal-workspace/conversation-history/after-desktop.png
new file mode 100644
index 0000000000..cf5e8edbc5
Binary files /dev/null and b/docs/assets/personal-workspace/conversation-history/after-desktop.png differ
diff --git a/docs/assets/personal-workspace/conversation-history/after-narrow.png b/docs/assets/personal-workspace/conversation-history/after-narrow.png
new file mode 100644
index 0000000000..44a1c714a1
Binary files /dev/null and b/docs/assets/personal-workspace/conversation-history/after-narrow.png differ
diff --git a/docs/assets/personal-workspace/conversation-history/before-desktop.png b/docs/assets/personal-workspace/conversation-history/before-desktop.png
new file mode 100644
index 0000000000..41d3bc5b2a
Binary files /dev/null and b/docs/assets/personal-workspace/conversation-history/before-desktop.png differ
diff --git a/examples/personal-workspace-browser/conversation-history-recovery.mjs b/examples/personal-workspace-browser/conversation-history-recovery.mjs
index a5db023c38..12344c4bd0 100644
--- a/examples/personal-workspace-browser/conversation-history-recovery.mjs
+++ b/examples/personal-workspace-browser/conversation-history-recovery.mjs
@@ -5,7 +5,7 @@ import { openWorkspacePage } from "./scenario-context.mjs";
 
 async function overlappingHistoryRefresh(browser, url) {
   const currentId = "session-manager-loopx-manager-codex", oldId = "older-overlap-session", turnId = "overlap-recovered-turn";
-  const staleRead = Promise.withResolvers(), staleStarted = Promise.withResolvers(), stream = Promise.withResolvers();
+  const staleRead = Promise.withResolvers(), staleStarted = Promise.withResolvers(), staleSettled = Promise.withResolvers(), stream = Promise.withResolvers();
   let oldReads = 0, freshReads = false;
   const context = await openWorkspacePage(browser, url, {
     gotoWaitUntil: "domcontentloaded",
@@ -27,7 +27,10 @@ async function overlappingHistoryRefresh(browser, url) {
         if (oldReads === 1) return route.fulfill({ status: 503, json: { error: "Synthetic missing history" } });
         if (!freshReads) {
           staleStarted.resolve(); await staleRead.promise;
-          return route.fulfill({ status: 503, json: { error: "Older request failed after recovery" } }).catch(() => {});
+          try {
+            await route.fulfill({ status: 503, json: { error: "Older request failed after recovery" } }).catch(() => {});
+          } finally { staleSettled.resolve(); }
+          return;
         }
         return route.fallback();
       });
@@ -46,8 +49,9 @@ async function overlappingHistoryRefresh(browser, url) {
     await notice.waitFor({ state: "hidden" });
     const composer = page.getByLabel("向 LoopX 发送消息");
     await composer.fill("保留这条草稿，稍后继续。");
-    const lateResponse = page.waitForResponse(response => new URL(response.url()).pathname === `/api/chat/sessions/${oldId}` && response.status() === 503);
-    staleRead.resolve(); await (await lateResponse).finished();
+    // The request may already have timed out: no browser response exists then.
+    // Observe settlement of the held reader, then check the visible owner.
+    staleRead.resolve(); await staleSettled.promise;
     await page.evaluate(() => new Promise(resolveFrame => requestAnimationFrame(() => requestAnimationFrame(resolveFrame))));
     await page.screenshot({ path: resolve(outputDir, "conversation-history-read-order-desktop.png"), animations: "disabled" });
     assert.equal(await notice.isVisible(), false, "An older read failure cannot reopen a recovered history warning");
@@ -234,6 +238,10 @@ export const conversationHistoryRecoveryScenario = {
             message_id: "answer", turn_id: `turn-${id}`, role: "agent", text, created_at: date,
           }]);
         }
+        page.__loopxRuntime.messages.get(currentId).push(
+          { message_id: "z-source-question", turn_id: "same-second", role: "user", text: "同一秒的原问题：请先核对公开资料。", created_at: "2026-08-13T01:00:01Z" },
+          { message_id: "a-source-answer", turn_id: "same-second", role: "agent", text: "同一秒的原回答：核验后再返回结论。", created_at: "2026-08-13T01:00:01Z" },
+        );
         return page.route("**/api/chat/sessions/*", async (route) => {
           if (route.request().method() === "GET" && new URL(route.request().url()).pathname === `/api/chat/sessions/${unavailable}`) {
             failedReads += 1;
@@ -247,6 +255,16 @@ export const conversationHistoryRecoveryScenario = {
       await page.getByRole("navigation", { name: "管家视图" }).getByRole("button", { name: /^(Chat|对话)$/ }).click();
       await page.getByText("目前正在核对微软现金流。", { exact: true }).waitFor({ state: "visible", timeout: 5000 });
       const notice = page.getByRole("status").filter({ hasText: "部分历史暂时无法读取" });
+      const sourceQuestion = page.getByText("同一秒的原问题：请先核对公开资料。", { exact: true });
+      await sourceQuestion.waitFor({ state: "visible" });
+      await page.screenshot({ path: resolve(outputDir, "conversation-history-source-order-desktop.png"), animations: "disabled" });
+      const historyText = await page.locator(".personal-channel-timeline").innerText();
+      assert.ok(historyText.indexOf("同一秒的原问题") < historyText.indexOf("同一秒的原回答"), "The original request stays before its same-second reply");
+      await page.setViewportSize({ width: 390, height: 844 });
+      await sourceQuestion.scrollIntoViewIfNeeded();
+      await page.screenshot({ path: resolve(outputDir, "conversation-history-source-order-mobile.png"), animations: "disabled" });
+      await page.setViewportSize({ width: 1512, height: 982 });
+
       await notice.waitFor({ state: "visible" });
       await page.screenshot({ path: resolve(outputDir, "conversation-history-partial-desktop.png"), animations: "disabled" });
       await page.setViewportSize({ width: 390, height: 844 });
@@ -299,11 +317,12 @@ export const conversationHistoryRecoveryScenario = {
       await page.locator(".personal-goal-link").first().click();
       await page.locator(".personal-manager-link").click();
       await page.getByRole("navigation", { name: "管家视图" }).getByRole("button", { name: /^(Chat|对话)$/ }).click();
+      await page.getByText("只看当前状态。", { exact: true }).waitFor({ state: "visible" });
       assert.equal(await page.getByText("只看当前状态。", { exact: true }).count(), 1, "Projection-only messages retain their exact stored identities");
       assert.equal(api.turnRequests.length, 1, "Projection history does not run an Agent");
       await recoveryObserverHandover(browser, url);
       await retiredHistoryRead(browser, url);
-      return { coverageEntries: context.coverageEntries, note: "History read recovery retains the draft and exact session. Navigation retires its observer and history-read ownership; delayed projection cannot block the current conversation or erase a replacement Turn's interrupt target." };
+      return { coverageEntries: context.coverageEntries, note: "History retains source order for timestamp ties, projection identity, the draft and exact session. Navigation retires its observer and history-read ownership; delayed projection cannot block the current conversation or erase a replacement Turn's interrupt target." };
     } finally {
       await context.close();
     }