diff --git a/apps/web/src/app/app-shell.tsx b/apps/web/src/app/app-shell.tsx
index af1a7ad..efd9743 100644
--- a/apps/web/src/app/app-shell.tsx
+++ b/apps/web/src/app/app-shell.tsx
@@ -8,12 +8,13 @@
  */
 import { useState } from 'react';
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
-import type { Session, TaskCard, TaskDetail } from '@contracts';
+import type { Session, TaskCard, TaskDetail, WorkOrderReply } from '@contracts';
 import {
   listApprovalsForMeRoute,
   listMessagesRoute,
   listTasksRoute,
   logoutRoute,
+  replyWorkOrderRoute,
   sessionRoute,
   taskDetailRoute,
 } from '@contracts';
@@ -25,6 +26,7 @@ import { ReportDesk } from '@features/desk-report';
 import { Ico } from '@web-shared/Ico.tsx';
 import { call } from '@web-shared/typed-fetch.ts';
 import { useChatWidth } from '@web-shared/useChatWidth.ts';
+import { EmptyState } from '@web-shared/desk/module-kit.tsx';
 import { SURFACE_META, canSeeSurface } from '@web-shared/gov/surfaces.ts';
 import { queryKeys } from './query.ts';
 
@@ -91,6 +93,17 @@ export function AppShell() {
 
   const me = session.data?.staff.name ?? '—';
 
+  /**
+   * 工单回传 —— 视图区与对话区同一条口。
+   * 回传后按键失效、画面由服务端重投影:前端不自行推演卡与工单的状态(§9.2)。
+   */
+  const replyOrder = useMutation({
+    mutationFn: (reply: WorkOrderReply) => call(replyWorkOrderRoute, { body: { reply } }),
+    onSuccess: () => {
+      void queryClient.invalidateQueries({ queryKey: ['desk'] });
+    },
+  });
+
   return (
     <div className="app-shell">
       <div className="app-body">
@@ -186,29 +199,72 @@ export function AppShell() {
               onPick={setTaskId}
               onCollapse={() => setCollapsed(true)}
             />
+            {/*
+              手上没任务时,三栏也得**站得住**:中栏与对话区各给自己的空态。
+              少一栏会让整个工位看着像坏了 —— 空态是常态,不是缺页。
+            */}
             {detail.data !== undefined ? (
-              <ViewRegion key={current} detail={detail.data} />
+              <ViewRegion
+                key={current}
+                detail={detail.data}
+                onReplyOrder={(reply) => replyOrder.mutate(reply)}
+              />
             ) : (
               <main className="execution-panel">
-                <div className="jc-list-empty">
-                  <Ico name="list-checks" s={18} />
-                  {tasks.isLoading ? '载入中…' : '还没有落到你工位的任务'}
-                </div>
+                {tasks.isLoading ? (
+                  <div className="jc-list-empty">
+                    <Ico name="list-checks" s={18} />
+                    载入中…
+                  </div>
+                ) : (
+                  <EmptyState
+                    ico="list-checks"
+                    tone="brand"
+                    title="手上没有任务"
+                    desc="流程走到你负责的活动时,任务会连同办这件事要用的全部上下文一起送到这里 —— 待处理的事、往来记录、产出的文件都在一屏之内。"
+                    hint="有新任务时左侧列表会亮角标"
+                  />
+                )}
               </main>
             )}
-            {detail.data !== undefined && (
-              <i
-                className="jc-vsplit"
-                title="拖拽调整对话区宽度 · 双击复位"
-                onPointerDown={split.onSplitDown}
-                onDoubleClick={split.onSplitReset}
-              />
-            )}
-            {detail.data !== undefined && (
-              <section className="session-chat">
-                <TaskChat key={current} />
-              </section>
-            )}
+            <i
+              className="jc-vsplit"
+              title="拖拽调整对话区宽度 · 双击复位"
+              onPointerDown={split.onSplitDown}
+              onDoubleClick={split.onSplitReset}
+            />
+            <section className="session-chat">
+              {detail.data !== undefined ? (
+                <TaskChat key={current} detail={detail.data} onLocate={() => undefined} />
+              ) : (
+                <div className="jc-tch">
+                  <header className="jc-tch-head">
+                    <span className="jc-tch-mark">
+                      <Ico name="bot" s={15} />
+                    </span>
+                    <b className="jc-tch-name">任务助理</b>
+                    <em className="jc-tch-tag">Agent</em>
+                    <span className="jc-tch-desc">开一单即可对话</span>
+                  </header>
+                  <div className="jc-tch-scroll">
+                    <EmptyState
+                      ico="messages-square"
+                      tone="brand"
+                      title="还没有可对话的任务"
+                      desc="每一单任务都有自己的对话:AI 有结论、要派工、或者要你拿个主意,都在那一单里说 —— 所以得先有一单在手。"
+                    />
+                  </div>
+                  <div className="copilot-composer session-composer">
+                    <div className="composer-row">
+                      <textarea rows={2} disabled placeholder="选中一单任务后就能在这里交代" />
+                      <button className="copilot-send" disabled>
+                        <Ico name="send" s={14} /> 发送
+                      </button>
+                    </div>
+                  </div>
+                </div>
+              )}
+            </section>
           </div>
         ) : module === 'approvals' ? (
           <ApprovalDesk />
diff --git a/apps/web/src/app/styles/app.css b/apps/web/src/app/styles/app.css
index 9c3270d..98e6d5c 100644
--- a/apps/web/src/app/styles/app.css
+++ b/apps/web/src/app/styles/app.css
@@ -2922,3 +2922,31 @@
 .proto-root .jc-tnav-btn.back svg {
   transform: translateY(-2px);
 }
+
+/* ── 工作日志(补充,非原型)—— 一行一步,标明谁的产出 ────────────────── */
+.proto-root .jc-log { display: flex; flex-direction: column; }
+.proto-root .jc-log-row { display: flex; gap: 10px; align-items: baseline; padding: 8px 2px; }
+.proto-root .jc-log-row + .jc-log-row { border-top: 1px solid var(--line-soft); }
+.proto-root .jc-log-at { flex: none; font-size: 10.5px; color: var(--ink-4); }
+.proto-root .jc-log-side { flex: none; font-size: 10.5px; font-weight: 700; padding: 1px 7px; border-radius: 999px; background: var(--soft); color: var(--ink-2); }
+/* 归侧四类各一色:机器 / 人 / 人裁 / 世界等待 —— 一眼看出这一步是谁推的 */
+.proto-root .jc-log-row.t-machine .jc-log-side { background: var(--brand-wash); color: var(--brand-deep); }
+.proto-root .jc-log-row.t-human .jc-log-side { background: #e6f7f4; color: #0a6a64; }
+.proto-root .jc-log-row.t-human-verdict .jc-log-side { background: #fff4e5; color: #de7802; }
+.proto-root .jc-log-row.t-world-wait .jc-log-side { background: var(--soft); color: var(--ink-3); }
+.proto-root .jc-log-t { flex: 1; min-width: 0; }
+.proto-root .jc-log-t b { display: block; font-size: 12.5px; font-weight: 600; }
+.proto-root .jc-log-t em { display: block; margin-top: 2px; font-style: normal; font-size: 11px; line-height: 1.6; color: var(--ink-3); }
+/* 成果二级界面的返回键 —— 顶部页签不变,右槽换成它 */
+.proto-root .jc-tnav-back { width: auto; padding: 0 9px; gap: 5px; font-size: 11.5px; font-weight: 600; }
+
+/* ── 窄对话区的抗压(补充,非原型)────────────────────────────────────
+   对话区在小屏上会被压到 ~210px(工作区优先保「五按钮 + 翻页」,任务列表可收起让位)。
+   卡片原样搬过来是不抗压的:卡头标题 `flex: 1` 没设 `min-width: 0`,一挤就**逐字折断**
+   成竖排单字;按钮同理。这里只教卡片怎么变窄,不改任何一栏的尺寸。
+
+   降级的顺序是:先让状态芯片换行下沉(标题拿回整行),标题始终整词可读 —— 而不是把
+   「工单 · 执行」截成一个「工」字。截断能让布局不崩,但读的人不知道这是什么卡。 */
+.proto-root .jc-fc-h { flex-wrap: wrap; row-gap: 3px; }
+.proto-root .jc-fc-h b { min-width: 0; flex: 1 1 auto; }
+.proto-root .jc-fc-open { white-space: nowrap; }
diff --git a/apps/web/src/features/desk-task/internal/TaskChat.tsx b/apps/web/src/features/desk-task/internal/TaskChat.tsx
index 5692ac0..2ab7285 100644
--- a/apps/web/src/features/desk-task/internal/TaskChat.tsx
+++ b/apps/web/src/features/desk-task/internal/TaskChat.tsx
@@ -1,45 +1,95 @@
 /**
  * 对话区 —— 「对话流是**一切回环输入的唯一入口**」(OS 4.1)。
  *
- * 壳(`jc-tch` 题头 / 滚动区 / composer)照原型留着;气泡与卡族备在 `chat-bubbles.tsx`。
- * 空态文案从用人的角度写 —— 空对话是这一单刚开始时的**常态**,不是缺陷。
+ * 壳(`jc-tch` 题头 / 滚动区 / composer)由 `ChatStream` 自己带;这里只做取数与回传:
+ * 说一句、答卡、答工单,回传后按键失效,画面由服务端重投影(前端零过程状态)。
+ *
+ * **有内容就渲染内容,没内容才落空态** —— 空对话是这一单刚开始时的常态,不是缺陷;
+ * 但一旦真有话,占位就变成了谎:角标说有、正文说没有,人会以为坏了。
  */
+import { useMutation, useQueryClient } from '@tanstack/react-query';
+import type { ChatCardReply, TaskDetail, WorkOrderReply } from '@contracts';
+import { replyChatCardRoute, replyWorkOrderRoute, sayRoute } from '@contracts';
+import { call } from '@web-shared/typed-fetch.ts';
 import { Ico } from '@web-shared/Ico.tsx';
+import { EmptyState } from '@web-shared/desk/module-kit.tsx';
+import { ChatStream } from './chat-bubbles.tsx';
 
-export function TaskChat() {
-  return (
-    <div className="jc-tch">
-      <header className="jc-tch-head">
-        <span className="jc-tch-mark">
-          <Ico name="bot" s={15} />
-        </span>
-        <b className="jc-tch-name">任务助理</b>
-        <em className="jc-tch-tag">Agent</em>
-        <span className="jc-tch-desc">盯着这单推进 · 有事随时说</span>
-      </header>
+export function TaskChat({ detail, onLocate }: { detail: TaskDetail; onLocate: (orderId: string) => void }) {
+  const queryClient = useQueryClient();
+  const taskId = detail.card.id;
 
-      <div className="jc-tch-scroll">
-        <div className="jc-empty t-brand">
-          <span className="jc-empty-art">
-            <i className="r1" />
-            <i className="r2" />
-            <span className="jc-empty-ico">
-              <Ico name="messages-square" s={26} />
-            </span>
+  /** 回传后一律重取任务投影 —— 卡与工单的状态由服务端说,前端不自行推演 */
+  const refresh = () => {
+    void queryClient.invalidateQueries({ queryKey: ['desk', 'task', taskId] });
+    void queryClient.invalidateQueries({ queryKey: ['desk', 'tasks'] });
+  };
+
+  const say = useMutation({
+    mutationFn: (text: string) => call(sayRoute, { params: { taskId }, body: { text } }),
+    onSuccess: refresh,
+  });
+  const replyCard = useMutation({
+    mutationFn: (reply: ChatCardReply) => call(replyChatCardRoute, { body: { reply } }),
+    onSuccess: refresh,
+  });
+  const replyOrder = useMutation({
+    mutationFn: (reply: WorkOrderReply) => call(replyWorkOrderRoute, { body: { reply } }),
+    onSuccess: refresh,
+  });
+
+  if (detail.chat.length === 0) {
+    return (
+      <div className="jc-tch">
+        <header className="jc-tch-head">
+          <span className="jc-tch-mark">
+            <Ico name="bot" s={15} />
           </span>
-          <b>还没有消息</b>
-          <p>AI 有结论、要派工、或者要你拿个主意,都会在这里说。你也可以随时交代两句。</p>
+          <b className="jc-tch-name">任务助理</b>
+          <em className="jc-tch-tag">Agent</em>
+          <span className="jc-tch-desc">盯着这单推进</span>
+        </header>
+        <div className="jc-tch-scroll">
+          <EmptyState
+            ico="messages-square"
+            tone="brand"
+            title="还没有消息"
+            desc="AI 有结论、要派工、或者要你拿个主意,都会在这里说。你也可以随时交代两句。"
+          />
+        </div>
+        <div className="copilot-composer session-composer">
+          <div className="composer-row">
+            <textarea
+              rows={2}
+              placeholder="有什么要补充或交代的?"
+              onKeyDown={(e) => {
+                if (e.key !== 'Enter' || e.shiftKey) return;
+                e.preventDefault();
+                const text = e.currentTarget.value.trim();
+                if (text !== '') {
+                  say.mutate(text);
+                  e.currentTarget.value = '';
+                }
+              }}
+            />
+            <button className="copilot-send" disabled={say.isPending}>
+              <Ico name="send" s={14} /> 发送
+            </button>
+          </div>
         </div>
       </div>
+    );
+  }
 
-      <div className="copilot-composer session-composer">
-        <div className="composer-row">
-          <textarea rows={2} disabled placeholder="有什么要补充或交代的?" />
-          <button className="copilot-send" disabled>
-            <Ico name="send" s={14} /> 发送
-          </button>
-        </div>
-      </div>
-    </div>
+  return (
+    <ChatStream
+      chat={detail.chat}
+      orders={detail.workOrders}
+      thinking={say.isPending}
+      onSay={(text) => say.mutate(text)}
+      onReplyCard={(reply) => replyCard.mutate(reply)}
+      onReplyOrder={(reply) => replyOrder.mutate(reply)}
+      onLocate={onLocate}
+    />
   );
 }
diff --git a/apps/web/src/features/desk-task/internal/ViewRegion.tsx b/apps/web/src/features/desk-task/internal/ViewRegion.tsx
index 6d043f6..e9d181a 100644
--- a/apps/web/src/features/desk-task/internal/ViewRegion.tsx
+++ b/apps/web/src/features/desk-task/internal/ViewRegion.tsx
@@ -11,24 +11,31 @@
  * 不写「这块还没做」—— 后者是开发视角,用户不关心,也看不懂。
  */
 import { useState } from 'react';
-import type { TaskDetail } from '@contracts';
+import type { FileDoc, TaskDetail, WorkOrderReply } from '@contracts';
 import { TERMINAL_STATE_LABEL } from '@contracts';
 import { Ico } from '@web-shared/Ico.tsx';
 import ScrollArea from '@web-shared/ScrollArea.tsx';
 import { EmptyState } from '@web-shared/desk/module-kit.tsx';
 import { ViewBlocks } from '@ui';
+import { WorkOrderReport } from './work-order-report.tsx';
+import { FileViewer } from './FileViewer.tsx';
 
 
 type Tab = 'open' | 'comms' | 'done' | 'wf' | 'log';
 
 export type ViewRegionProps = {
   readonly detail: TaskDetail;
+  /** 工单回传 —— 由壳层接路由,视图区只管把人填的东西交出去 */
+  onReplyOrder: (reply: WorkOrderReply) => void;
 };
 
 
-export function ViewRegion({ detail }: ViewRegionProps) {
+export function ViewRegion({ detail, onReplyOrder }: ViewRegionProps) {
   const [view, setView] = useState<Tab>('open');
   const [page, setPage] = useState(0);
+  /** 表单值是**过程状态**,只活在这一次填写里:回传成功后画面由服务端重投影 */
+  const [values, setValues] = useState<Record<string, string>>({});
+  const [openFile, setOpenFile] = useState<FileDoc | undefined>(undefined);
 
   const orders = detail.workOrders;
   const openList = orders.filter((o) => o.done === undefined);
@@ -140,7 +147,15 @@ export function ViewRegion({ detail }: ViewRegionProps) {
             翻页**恒显示**:只有一件也出 1/1,两侧箭头灰显。
             按件数隐藏会让点位条忽有忽无,右侧跟着跳 —— 页签条要定得住。
           */}
-          {view === 'open' && (
+          {/*
+            右槽两态:成果进二级界面时是「返回」,否则待处理位上是翻页。
+            顶部五个按钮**始终不变** —— 二级界面长在工作区内部,不是另一页。
+          */}
+          {openFile !== undefined ? (
+            <button type="button" className="jc-tnav-btn jc-tnav-back" onClick={() => setOpenFile(undefined)}>
+              <Ico name="arrow-left" s={14} /> 返回
+            </button>
+          ) : view === 'open' ? (
             <span className="jc-tnav-pg" aria-label="翻页">
               <button
                 type="button"
@@ -164,7 +179,7 @@ export function ViewRegion({ detail }: ViewRegionProps) {
                 <Ico name="chevron-right" s={15} />
               </button>
             </span>
-          )}
+          ) : null}
         </div>
 
         {/* key:换件 / 换页签即重挂载滚动区,回到正文顶部 */}
@@ -174,7 +189,9 @@ export function ViewRegion({ detail }: ViewRegionProps) {
           vpClassName="wf-body"
           inset={-6}
         >
-          {view === 'comms' ? (
+          {openFile !== undefined ? (
+            <FileViewer doc={openFile} />
+          ) : view === 'comms' ? (
             /* 占位:与外界的往来(邮件线程等)还没接进来 —— 明说没接,不装成「暂无数据」 */
             <EmptyState
               ico="mail"
@@ -185,12 +202,27 @@ export function ViewRegion({ detail }: ViewRegionProps) {
           ) : view === 'wf' ? (
             <WfDetail detail={detail} openN={openList.length} doneN={orders.length - openList.length} />
           ) : view === 'log' ? (
-            <EmptyState
-              ico="archive"
-              tone="brand"
-              title="还没有进展"
-              desc="AI 每推进一步都记在这里,并标明是谁的产出:AI 完成、我填的、我确认的、等外部。"
-            />
+            detail.log.length > 0 ? (
+              <div className="jc-log">
+                {detail.log.map((line) => (
+                  <div key={line.id} className={'jc-log-row t-' + line.side}>
+                    <span className="jc-log-at jc-mono">{line.at.slice(5, 16).replace('T', ' ')}</span>
+                    <span className="jc-log-side">{line.sideLabel}</span>
+                    <span className="jc-log-t">
+                      <b>{line.title}</b>
+                      {line.summary !== undefined && <em>{line.summary}</em>}
+                    </span>
+                  </div>
+                ))}
+              </div>
+            ) : (
+              <EmptyState
+                ico="archive"
+                tone="brand"
+                title="还没有进展"
+                desc="AI 每推进一步都记在这里,并标明是谁的产出:AI 完成、我填的、我确认的、等外部。"
+              />
+            )
           ) : view === 'done' ? (
             <EmptyState
               ico="archive"
@@ -198,6 +230,21 @@ export function ViewRegion({ detail }: ViewRegionProps) {
               title="还没有成果"
               desc="这一单产出的报告与文件会归档在这里,一行一份、点开整篇看。"
             />
+          ) : cur !== undefined ? (
+            /*
+              有工单就把工单摆出来 —— 角标说有 1 件、正文说「手上没有待办」,那是占位在说谎。
+              办这张单要用的上下文(活动推的那一屏、依据、表单)由 WorkOrderReport 一并铺开。
+            */
+            <WorkOrderReport
+              order={cur}
+              detail={detail}
+              typeLine={cur.mode === 'acceptance' ? '验收工单 · 终局唯放行' : '执行工单 · 作业指导书 + 表单'}
+              blocks={cur.mode === 'execution' ? (cur.blocks ?? detail.view) : detail.view}
+              {...(detail.viewHtml === undefined ? {} : { html: detail.viewHtml, srcTitle: detail.card.activity })}
+              values={values}
+              onField={(k, v) => setValues((old) => ({ ...old, [k]: v }))}
+              onReply={onReplyOrder}
+            />
           ) : (
             <EmptyState
               ico="list-checks"