diff --git a/frontend/src/admin/AdminLayout.tsx b/frontend/src/admin/AdminLayout.tsx
index ba33bd1..e02fce3 100644
--- a/frontend/src/admin/AdminLayout.tsx
+++ b/frontend/src/admin/AdminLayout.tsx
@@ -9,6 +9,7 @@ import { useState, useEffect, useCallback } from 'react'
 import { NavLink, Outlet, useLocation } from 'react-router-dom'
 import { fetchAuthState, logout, UNAUTHORIZED_EVENT } from './api'
 import { fetchHealth } from './dal'
+import { COMMAND_PALETTE_PAGES, ROUTE_LABELS, NAV_SECTIONS } from './nav'
 import Login from './Login'
 import { useCommandPalette, CommandPalette } from './useCommandPalette'
 
@@ -88,58 +89,9 @@ function Icon({ name }: { name: string }) {
   }
 }
 
-const NAV_PAGES: Array<{ to: string; label: string; group: string }> = [
-  { to: '/admin', label: '仪表盘', group: '概览' },
-  { to: '/admin/collection', label: '数据采集', group: '数据流水线' },
-      { to: '/admin/data-completeness', label: '数据完整性', group: '数据流水线' },
-      { to: '/admin/data-pipeline', label: '数据管线', group: '数据流水线' },
-      { to: '/admin/predictions', label: '预测历史', group: '数据流水线' },
-  { to: '/admin/backtest', label: '回测', group: '数据流水线' },
-  { to: '/admin/monitoring', label: '监控', group: '评估与监控' },
-  { to: '/admin/eval', label: '评估', group: '评估与监控' },
-  { to: '/admin/settings', label: '设置', group: '系统' },
-  { to: '/admin/logs', label: '日志', group: '系统' },
-]
-
-// 路由 → 面包屑标签
-const ROUTE_LABELS: Record<string, string> = {
-  '/admin': '仪表盘',
-  '/admin/collection': '数据采集',
-  '/admin/data-completeness': '数据完整性',
-  '/admin/data-pipeline': '数据管线',
-  '/admin/predictions': '预测历史',
-  '/admin/backtest': '回测',
-  '/admin/monitoring': '监控',
-  '/admin/settings': '设置',
-  '/admin/logs': '日志',
-  '/admin/eval': '评估',
-}
-
-const NAV_SECTIONS: { title: string; items: Array<{ to: string; label: string; icon: string }> }[] = [
-  {
-    title: '数据流水线',
-    items: [
-      { to: '/admin/collection', label: '数据采集', icon: 'collection' },
-      { to: '/admin/data-completeness', label: '数据完整性', icon: 'chart' },
-      { to: '/admin/predictions', label: '预测历史', icon: 'logs' },
-      { to: '/admin/backtest', label: '回测', icon: 'repeat' },
-    ],
-  },
-  {
-    title: '评估与监控',
-    items: [
-      { to: '/admin/eval', label: '评估', icon: 'eval' },
-      { to: '/admin/monitoring', label: '监控', icon: 'monitor' },
-    ],
-  },
-  {
-    title: '系统设置',
-    items: [
-      { to: '/admin/settings', label: '设置', icon: 'settings' },
-      { to: '/admin/logs', label: '日志', icon: 'logs' },
-    ],
-  },
-]
+// D6: 导航三视图(侧栏/命令面板/面包屑)统一由 admin/nav.ts 的 NAV_ITEMS
+// 单源派生 —— 此处的 NAV_PAGES/ROUTE_LABELS/NAV_SECTIONS 平行清单已删除,
+// 新增页面/改标签只改 nav.ts 一处。
 
 /** 报眉日期行,与前台同款式 */
 function dateLine(): string {
@@ -156,7 +108,7 @@ export default function AdminLayout() {
   const [healthOk, setHealthOk] = useState<boolean | null>(null)
   const [authed, setAuthed] = useState<boolean | null>(null)
   const location = useLocation()
-  const palette = useCommandPalette(NAV_PAGES)
+  const palette = useCommandPalette(COMMAND_PALETTE_PAGES)
 
   // 登录门禁:挂载时探测会话,收到 401 事件(会话过期)自动切回登录页
   useEffect(() => {
diff --git a/frontend/src/admin/nav.ts b/frontend/src/admin/nav.ts
new file mode 100644
index 0000000..7b67e7d
--- /dev/null
+++ b/frontend/src/admin/nav.ts
@@ -0,0 +1,67 @@
+/**
+ * Admin 导航单源(D6)。
+ *
+ * 背景: 侧栏(NAV_SECTIONS)、命令面板(NAV_PAGES)、面包屑(ROUTE_LABELS)
+ * 此前各维护一份平行清单,已出现漂移 —— data-pipeline 不在侧栏、
+ * 「系统」vs「系统设置」命名不一致、monitoring/eval 两处顺序相反。
+ *
+ * 现在只允许维护 NAV_ITEMS 一份,其余视图一律由此派生;
+ * 禁止再新建平行导航清单(修改入口/新增页面只改这里)。
+ */
+
+export interface NavItem {
+  to: string
+  label: string
+  /** 命令面板中的分组名(展示原样) */
+  group: string
+  /** 侧栏图标名(见 AdminLayout 的 Icon) */
+  icon: string
+  /** 仅命令面板/面包屑可达,不进侧栏(深链页) */
+  hideFromSidebar?: boolean
+}
+
+/** 唯一的导航配置源。顺序 = 侧栏渲染顺序(命令面板分组内顺序与之相同)。 */
+export const NAV_ITEMS: NavItem[] = [
+  { to: '/admin', label: '仪表盘', group: '概览', icon: 'chart' },
+  { to: '/admin/collection', label: '数据采集', group: '数据流水线', icon: 'collection' },
+  { to: '/admin/data-completeness', label: '数据完整性', group: '数据流水线', icon: 'chart' },
+  { to: '/admin/data-pipeline', label: '数据管线', group: '数据流水线', icon: 'chart', hideFromSidebar: true },
+  { to: '/admin/predictions', label: '预测历史', group: '数据流水线', icon: 'logs' },
+  { to: '/admin/backtest', label: '回测', group: '数据流水线', icon: 'repeat' },
+  { to: '/admin/eval', label: '评估', group: '评估与监控', icon: 'eval' },
+  { to: '/admin/monitoring', label: '监控', group: '评估与监控', icon: 'monitor' },
+  { to: '/admin/settings', label: '设置', group: '系统', icon: 'settings' },
+  { to: '/admin/logs', label: '日志', group: '系统', icon: 'logs' },
+]
+
+/** 命令面板条目(原 NAV_PAGES 的唯一来源) */
+export const COMMAND_PALETTE_PAGES = NAV_ITEMS.map(({ to, label, group }) => ({ to, label, group }))
+
+/** 路由 → 面包屑标签(原 ROUTE_LABELS 的唯一来源) */
+export const ROUTE_LABELS: Record<string, string> = Object.fromEntries(
+  NAV_ITEMS.map(i => [i.to, i.label]),
+)
+
+/** 侧栏分组标题的历史显示名(仅侧栏使用;与面板分组名不同时在此映射) */
+const SIDEBAR_GROUP_TITLES: Record<string, string> = {
+  系统: '系统设置',
+}
+
+/**
+ * 侧栏分组(原 NAV_SECTIONS 的唯一来源)。
+ * 仪表盘(group=概览)在 AdminLayout 中独立渲染于顶部,不进分组循环。
+ */
+export const NAV_SECTIONS = (() => {
+  const sidebarItems = NAV_ITEMS.filter(i => !i.hideFromSidebar && i.group !== '概览')
+  const titles: string[] = []
+  for (const i of sidebarItems) {
+    const title = SIDEBAR_GROUP_TITLES[i.group] ?? i.group
+    if (!titles.includes(title)) titles.push(title)
+  }
+  return titles.map(title => ({
+    title,
+    items: sidebarItems
+      .filter(i => (SIDEBAR_GROUP_TITLES[i.group] ?? i.group) === title)
+      .map(({ to, label, icon }) => ({ to, label, icon })),
+  }))
+})()