diff --git a/yunkes/src/components/staffchat/ChatMain.vue b/yunkes/src/components/staffchat/ChatMain.vue
new file mode 100644
index 0000000..936cdbc
--- /dev/null
+++ b/yunkes/src/components/staffchat/ChatMain.vue
@@ -0,0 +1,13 @@
+<!-- 占位组件: Task 11 实现聊天窗口(消息流+定位 msgid),签名锁定如下。 -->
+<script setup lang="ts">
+defineProps<{
+  ownerId: string
+  /** single=单聊(talkerId=客户 wxid), group=群聊(talkerId=room_id) */
+  kind: 'single' | 'group'
+  talkerId: string
+}>()
+</script>
+
+<template>
+  <div class="yk-empty">聊天窗口 — Task 11 实现</div>
+</template>
diff --git a/yunkes/src/components/staffchat/ContactsPane.vue b/yunkes/src/components/staffchat/ContactsPane.vue
new file mode 100644
index 0000000..8f24f8c
--- /dev/null
+++ b/yunkes/src/components/staffchat/ContactsPane.vue
@@ -0,0 +1,8 @@
+<!-- 占位组件: Task 13 实现通讯录视图,签名锁定如下。 -->
+<script setup lang="ts">
+defineProps<{ ownerId: string }>()
+</script>
+
+<template>
+  <div class="yk-empty">通讯录 — Task 13 实现</div>
+</template>
diff --git a/yunkes/src/components/staffchat/MomentsPane.vue b/yunkes/src/components/staffchat/MomentsPane.vue
new file mode 100644
index 0000000..7f83835
--- /dev/null
+++ b/yunkes/src/components/staffchat/MomentsPane.vue
@@ -0,0 +1,8 @@
+<!-- 占位组件: Task 12 实现朋友圈视图,签名锁定如下。 -->
+<script setup lang="ts">
+defineProps<{ ownerId: string }>()
+</script>
+
+<template>
+  <div class="yk-empty">朋友圈 — Task 12 实现</div>
+</template>
diff --git a/yunkes/src/components/staffchat/SessionPane.vue b/yunkes/src/components/staffchat/SessionPane.vue
new file mode 100644
index 0000000..dbe5d9f
--- /dev/null
+++ b/yunkes/src/components/staffchat/SessionPane.vue
@@ -0,0 +1,18 @@
+<!-- 占位组件: Task 10 实现会话列表(好友/群,含搜索+今日条数),签名锁定如下。 -->
+<script setup lang="ts">
+import type { Channel, ChatSession } from '@/api/types'
+
+defineProps<{
+  channel: Channel
+  ownerId: string
+  /** single=好友会话, group=群会话 */
+  kind: 'single' | 'group'
+  /** 当前选中会话 id(talker_id 或 room_id) */
+  activeId: string | null
+}>()
+defineEmits<{ select: [session: ChatSession] }>()
+</script>
+
+<template>
+  <div class="yk-empty">会话列表 — Task 10 实现</div>
+</template>
diff --git a/yunkes/src/components/staffchat/StaffChatSide.vue b/yunkes/src/components/staffchat/StaffChatSide.vue
new file mode 100644
index 0000000..cb5be7a
--- /dev/null
+++ b/yunkes/src/components/staffchat/StaffChatSide.vue
@@ -0,0 +1,149 @@
+<script setup lang="ts">
+import type { Account } from '@/api/types'
+
+const props = defineProps<{ profile: Account | null; ownerIdFallback: string; tab: string }>()
+const emit = defineEmits<{ select: [tab: string]; collapse: [] }>()
+const NAVS = [
+  { key: 'single', label: '单聊' }, { key: 'group', label: '群聊' }, { key: 'moments', label: '朋友圈' },
+  { key: 'contacts', label: '通讯录' }, { key: 'stats', label: '统计分析' },
+] as const
+</script>
+
+<template>
+  <div class="sc-side">
+    <!-- 员工资料卡: 头像+昵称 / 真名·电话 / 微信号 (对齐云客资料卡四要素) -->
+    <div class="sc-side__card">
+      <el-avatar :size="44" :src="props.profile?.avatar ?? undefined">
+        {{ (props.profile?.nickname || props.ownerIdFallback).slice(0, 1) }}
+      </el-avatar>
+      <div class="sc-side__who">
+        <div class="sc-side__nick">{{ props.profile?.nickname || props.ownerIdFallback }}</div>
+        <div v-if="props.profile?.user_name || props.profile?.phone" class="sc-side__meta">
+          {{ props.profile?.user_name }} {{ props.profile?.phone }}
+        </div>
+        <div class="sc-side__meta">{{ props.profile?.account_id ?? props.ownerIdFallback }}</div>
+      </div>
+    </div>
+    <nav class="sc-side__nav">
+      <button
+        v-for="n in NAVS"
+        :key="n.key"
+        class="sc-side__navbtn"
+        :class="{ 'is-active': props.tab === n.key }"
+        @click="emit('select', n.key)"
+      >{{ n.label }}</button>
+    </nav>
+    <button class="sc-side__collapse" @click="emit('collapse')">收起侧边栏</button>
+  </div>
+</template>
+
+<style scoped>
+/* ══ 员工聊天窗口左栏(墨玉主题,手法沿用 ChatSidebar) ══
+   点阵底 + 玉绿渐变分隔线 + 药丸按钮;card 顶 / nav 中 / collapse 贴底。 */
+.sc-side {
+  display: flex;
+  flex-direction: column;
+  width: 240px;
+  flex: none;
+  position: relative;
+  background:
+    radial-gradient(circle at 1px 1px, rgba(23,29,43,.03) 1px, transparent 0) 0 0/18px 18px,
+    linear-gradient(180deg, #fafbfd 0%, #f6f8fa 100%);
+}
+.sc-side::after {
+  content: '';
+  position: absolute;
+  top: 0; right: 0; bottom: 0;
+  width: 1px;
+  background: linear-gradient(180deg, transparent 0%, rgba(13,159,110,.12) 20%, rgba(23,29,43,.06) 100%);
+  pointer-events: none;
+}
+
+/* ── 员工资料卡(毛玻璃名片) ── */
+.sc-side__card {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  margin: 12px;
+  padding: 12px;
+  background: rgba(255,255,255,.85);
+  backdrop-filter: blur(8px);
+  border: 1px solid rgba(23,29,43,.05);
+  border-radius: 12px;
+  box-shadow: 0 1px 3px rgba(23,29,43,.05);
+}
+.sc-side__card .el-avatar {
+  flex: none;
+  border-radius: 12px;
+  border: 1px solid rgba(23,29,43,.05);
+  box-shadow: 0 1px 3px rgba(23,29,43,.06);
+  font-weight: 600;
+}
+.sc-side__who { min-width: 0; }
+.sc-side__nick {
+  font-size: 15px;
+  font-weight: 600;
+  color: #2b3240;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.sc-side__meta {
+  font-size: 11.5px;
+  color: #8a94a4;
+  margin-top: 2px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+/* ── 竖排导航(玉绿茶丸) ── */
+.sc-side__nav {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  padding: 12px 10px;
+  overflow-y: auto;
+}
+.sc-side__navbtn {
+  padding: 10px 16px;
+  font-size: 13.5px;
+  text-align: left;
+  color: #5a6472;
+  background: rgba(255,255,255,.7);
+  border: 1px solid rgba(23,29,43,.06);
+  border-radius: 999px;
+  cursor: pointer;
+  transition: all 0.2s cubic-bezier(.22,.8,.36,1);
+}
+.sc-side__navbtn:hover:not(.is-active) {
+  color: #2b3240;
+  background: #fff;
+  box-shadow: 0 1px 4px rgba(23,29,43,.06);
+}
+.sc-side__navbtn.is-active {
+  color: var(--el-color-primary);
+  background: linear-gradient(135deg, #fff 0%, #e8f7ef 100%);
+  border-color: rgba(13,159,110,.25);
+  font-weight: 600;
+  box-shadow: 0 2px 8px -2px rgba(13,159,110,.25);
+}
+
+/* ── 底部收起 ── */
+.sc-side__collapse {
+  margin: 10px 12px 12px;
+  padding: 8px;
+  font-size: 12px;
+  color: #8a94a4;
+  background: rgba(23,29,43,.04);
+  border: none;
+  border-radius: 999px;
+  cursor: pointer;
+  transition: all 0.2s ease;
+}
+.sc-side__collapse:hover {
+  color: #5a6472;
+  background: rgba(23,29,43,.07);
+}
+</style>
diff --git a/yunkes/src/components/staffchat/StatsPane.vue b/yunkes/src/components/staffchat/StatsPane.vue
new file mode 100644
index 0000000..81a3337
--- /dev/null
+++ b/yunkes/src/components/staffchat/StatsPane.vue
@@ -0,0 +1,8 @@
+<!-- 占位组件: Task 14 实现统计分析视图,签名锁定如下。 -->
+<script setup lang="ts">
+defineProps<{ ownerId: string }>()
+</script>
+
+<template>
+  <div class="yk-empty">统计分析 — Task 14 实现</div>
+</template>
diff --git a/yunkes/src/utils/__tests__/format.spec.ts b/yunkes/src/utils/__tests__/format.spec.ts
index 5f8a87c..f2d34c9 100644
--- a/yunkes/src/utils/__tests__/format.spec.ts
+++ b/yunkes/src/utils/__tests__/format.spec.ts
@@ -36,4 +36,9 @@ describe('relativeChatTime', () => {
     const lastYear = new Date().getFullYear() - 1
     expect(relativeChatTime(at(lastYear, 5, 10))).toBe(`${lastYear}年6月10日`)
   })
+
+  it('null/undefined → 空串(可空友好,免调用方 ?? 0 渲染 1970)', () => {
+    expect(relativeChatTime(null)).toBe('')
+    expect(relativeChatTime(undefined)).toBe('')
+  })
 })
diff --git a/yunkes/src/utils/format.ts b/yunkes/src/utils/format.ts
index 703841a..90d84ec 100644
--- a/yunkes/src/utils/format.ts
+++ b/yunkes/src/utils/format.ts
@@ -24,8 +24,11 @@ export function formatTimeShort(ts?: number | null): string {
 /**
  * 云客聊天窗口相对时间(会话列表/消息时间轴用): 今天→HH:mm,
  * 昨天→`昨天`, 今年→`M月D日`, 往年→`YYYY年M月D日`。
+ * null/undefined → `''`(与 formatTimeShort 一致,调用方可直接传可空字段,
+ * 无需 `?? 0` 兜底——那会把缺时间渲染成 1970年1月1日)。
  */
-export function relativeChatTime(ms: number): string {
+export function relativeChatTime(ms?: number | null): string {
+  if (ms == null) return ''
   const d = new Date(ms)
   const now = new Date()
   const sameDay = (a: Date, b: Date) => a.toDateString() === b.toDateString()
diff --git a/yunkes/src/views/StaffChat.vue b/yunkes/src/views/StaffChat.vue
index 91d8e08..a1db081 100644
--- a/yunkes/src/views/StaffChat.vue
+++ b/yunkes/src/views/StaffChat.vue
@@ -1,14 +1,136 @@
-<!-- 占位组件: Task 8 只加路由, 五视图实现在后续任务替换本文件。 -->
+<!-- 员工聊天窗口骨架(对齐云客 wechat-window): 左栏资料卡+导航 / 中列会话 / 右列内容。
+     各 pane 由 Task 10-14 逐个替换占位实现。 -->
 <script setup lang="ts">
-// Route props (/staff-chat/:ownerId/:tab?/:talkerId?) — see router/index.ts.
-// tab=group 时 talkerId 语义为 roomId; ?msgid= 定位消息(红包转账明细跳转)。
-const props = defineProps<{
-  ownerId: string
-  tab?: string
-  talkerId?: string
-}>()
+import { computed, ref, watch } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import { getAccounts } from '@/api'
+import type { Account } from '@/api/types'
+import StaffChatSide from '@/components/staffchat/StaffChatSide.vue'
+import SessionPane from '@/components/staffchat/SessionPane.vue'
+import ChatMain from '@/components/staffchat/ChatMain.vue'
+import MomentsPane from '@/components/staffchat/MomentsPane.vue'
+import ContactsPane from '@/components/staffchat/ContactsPane.vue'
+import StatsPane from '@/components/staffchat/StatsPane.vue'
+
+const props = defineProps<{ ownerId: string; tab?: string; talkerId?: string }>()
+const route = useRoute()
+const router = useRouter()
+const VALID = ['single', 'group', 'moments', 'contacts', 'stats']
+// 注: 路由 regex 已过滤非法 tab(BOGUS 会进 talkerId 位而非 tab 位,3 段非法 URL 被 catch-all 弹走)
+// 这里 computed 兜底 undefined/'' → single
+const tab = computed(() => (props.tab && VALID.includes(props.tab) ? props.tab : 'single'))
+
+const profile = ref<Account | null>(null)
+const collapsed = ref(false)
+async function loadProfile() {
+  try {
+    const res = await getAccounts({ channel: 'wechat', page: 1, page_size: 100 })
+    profile.value = res.items.find(a => a.account_id === props.ownerId) ?? null
+  } catch {
+    // 后端未起/请求失败: 资料卡退化为 ownerId 兜底显示
+    profile.value = null
+  }
+}
+watch(() => props.ownerId, loadProfile, { immediate: true })
+
+function onSelectTab(t: string) {
+  router.push({ name: 'staff-chat', params: { ownerId: props.ownerId, tab: t } })
+}
+function onSelectSession(s: { type: 'friend' | 'group'; talker_id?: string | null; room_id?: string | null }) {
+  router.push({
+    name: 'staff-chat',
+    params: {
+      ownerId: props.ownerId,
+      tab: s.type === 'group' ? 'group' : 'single',
+      talkerId: s.talker_id ?? s.room_id ?? '',
+    },
+    query: route.query.msgid ? { msgid: String(route.query.msgid) } : {},
+  })
+}
+
+const chatMode = computed(() => tab.value === 'single' || tab.value === 'group')
+const paneKind = computed<'single' | 'group'>(() => (tab.value === 'group' ? 'group' : 'single'))
 </script>
 
 <template>
-  <div data-staff-chat :data-owner-id="props.ownerId" />
+  <div class="sc-root">
+    <button v-if="collapsed" class="sc-root__expand" title="展开侧边栏" @click="collapsed = false">
+      展开侧边栏
+    </button>
+    <StaffChatSide
+      v-else
+      :profile="profile"
+      :owner-id-fallback="props.ownerId"
+      :tab="tab"
+      @select="onSelectTab"
+      @collapse="collapsed = true"
+    />
+    <template v-if="chatMode">
+      <SessionPane
+        class="sc-root__sessions"
+        channel="wechat"
+        :owner-id="props.ownerId"
+        :kind="paneKind"
+        :active-id="props.talkerId || null"
+        @select="onSelectSession"
+      />
+      <ChatMain
+        class="sc-root__chat"
+        :owner-id="props.ownerId"
+        :kind="paneKind"
+        :talker-id="props.talkerId ?? ''"
+      />
+    </template>
+    <MomentsPane v-else-if="tab === 'moments'" class="sc-root__pane" :owner-id="props.ownerId" />
+    <ContactsPane v-else-if="tab === 'contacts'" class="sc-root__pane" :owner-id="props.ownerId" />
+    <StatsPane v-else-if="tab === 'stats'" class="sc-root__pane" :owner-id="props.ownerId" />
+  </div>
 </template>
+
+<style scoped>
+/* 三栏 flex: 左栏 240px(StaffChatSide 自带) / 中列 280px / 右列 flex:1。
+   高度预留 app header,对齐 ChatTimeline 的 calc(100vh - 120px)。 */
+.sc-root {
+  display: flex;
+  gap: 12px;
+  height: calc(100vh - 120px);
+  min-height: 400px;
+}
+
+/* 折叠态竖条展开按钮 */
+.sc-root__expand {
+  flex: none;
+  width: 28px;
+  border: 1px solid rgba(23,29,43,.06);
+  border-radius: 8px;
+  background: rgba(255,255,255,.85);
+  backdrop-filter: blur(8px);
+  color: #5a6472;
+  font-size: 12px;
+  letter-spacing: 0.2em;
+  writing-mode: vertical-lr;
+  cursor: pointer;
+  transition: all 0.2s ease;
+}
+.sc-root__expand:hover {
+  color: var(--el-color-primary);
+  border-color: rgba(13,159,110,.25);
+  box-shadow: 0 2px 8px -2px rgba(13,159,110,.25);
+}
+
+/* 中列(会话列表)与右列(内容) — pane 组件自带内部样式,这里只定占位 */
+.sc-root__sessions {
+  width: 280px;
+  flex: none;
+  min-width: 0;
+}
+.sc-root__chat {
+  flex: 1;
+  min-width: 0;
+}
+.sc-root__pane {
+  flex: 1;
+  min-width: 0;
+  overflow-y: auto;
+}
+</style>