diff --git a/apps/web/src/app/[locale]/automation/page.tsx b/apps/web/src/app/[locale]/automation/page.tsx
new file mode 100644
index 00000000..b8a3e5cc
--- /dev/null
+++ b/apps/web/src/app/[locale]/automation/page.tsx
@@ -0,0 +1,37 @@
+'use client'
+
+/**
+ * 自動化 (/automation) — Sprint 5 整合頁面
+ * 整合: 自動修復 + 神經指揮 + Drift 偵測
+ * 零假數據: 全部載入現有頁面內容
+ * 建立時間: 2026-04-08 (台北時區)
+ */
+
+import { lazy, Suspense } from 'react'
+import { useTranslations } from 'next-intl'
+import { AppLayout } from '@/components/layout'
+import { PageTabs, type TabConfig } from '@/components/layout/page-tabs'
+
+const AutoRepairContent = lazy(() => import('@/app/[locale]/auto-repair/page'))
+const NeuralCommandContent = lazy(() => import('@/app/[locale]/neural-command/page'))
+const DriftContent = lazy(() => import('@/app/[locale]/drift/page'))
+
+function Loading() {
+  return <div style={{ padding: 32, textAlign: 'center', color: '#87867f' }}>載入中...</div>
+}
+
+export default function AutomationPage({ params }: { params: { locale: string } }) {
+  const t = useTranslations('nav')
+
+  const tabs: TabConfig[] = [
+    { id: 'repair', label: t('autoRepair'), content: <Suspense fallback={<Loading />}><AutoRepairContent params={params} /></Suspense> },
+    { id: 'neural', label: t('neuralCommand'), content: <Suspense fallback={<Loading />}><NeuralCommandContent params={params} /></Suspense> },
+    { id: 'drift', label: t('drift'), content: <Suspense fallback={<Loading />}><DriftContent params={params} /></Suspense> },
+  ]
+
+  return (
+    <AppLayout locale={params.locale}>
+      <PageTabs tabs={tabs} defaultTab="repair" syncWithUrl={true} />
+    </AppLayout>
+  )
+}
diff --git a/apps/web/src/app/[locale]/knowledge/page.tsx b/apps/web/src/app/[locale]/knowledge/page.tsx
new file mode 100644
index 00000000..4770f8fc
--- /dev/null
+++ b/apps/web/src/app/[locale]/knowledge/page.tsx
@@ -0,0 +1,23 @@
+'use client'
+
+/**
+ * 知識 (/knowledge) — Sprint 5 整合頁面
+ * 直接載入現有 knowledge-base 內容
+ * 零假數據: 原封不動使用現有頁面
+ * 建立時間: 2026-04-08 (台北時區)
+ */
+
+import { lazy, Suspense } from 'react'
+import { AppLayout } from '@/components/layout'
+
+const KnowledgeBaseContent = lazy(() => import('@/app/[locale]/knowledge-base/page'))
+
+export default function KnowledgePage({ params }: { params: { locale: string } }) {
+  return (
+    <AppLayout locale={params.locale}>
+      <Suspense fallback={<div style={{ padding: 32, textAlign: 'center', color: '#87867f' }}>載入中...</div>}>
+        <KnowledgeBaseContent params={params} />
+      </Suspense>
+    </AppLayout>
+  )
+}
diff --git a/apps/web/src/app/[locale]/observability/page.tsx b/apps/web/src/app/[locale]/observability/page.tsx
new file mode 100644
index 00000000..0a18b5bb
--- /dev/null
+++ b/apps/web/src/app/[locale]/observability/page.tsx
@@ -0,0 +1,92 @@
+'use client'
+
+/**
+ * 可觀測性 (/observability) — Sprint 5 整合頁面
+ * ================================================
+ * 整合: 服務監控 + APM + 錯誤追蹤 + 應用 + 服務目錄
+ * 使用 PageTabs 共用元件，每個 Tab 載入對應的現有頁面內容
+ *
+ * 零假數據: 所有 Tab 內容串接現有真實 API
+ *
+ * 建立時間: 2026-04-08 (台北時區)
+ * 建立者: Claude Code (Sprint 5 Phase 3)
+ */
+
+import { lazy, Suspense } from 'react'
+import { useTranslations } from 'next-intl'
+import { AppLayout } from '@/components/layout'
+import { PageTabs, type TabConfig } from '@/components/layout/page-tabs'
+
+// 延遲載入現有頁面內容 (避免一次載入所有 Tab)
+// 注意: 這些直接 import 現有頁面的內部邏輯，不是 Mock
+const MonitoringContent = lazy(() => import('@/app/[locale]/monitoring/page').then(m => ({ default: m.default })))
+const APMContent = lazy(() => import('@/app/[locale]/apm/page').then(m => ({ default: m.default })))
+const ErrorsContent = lazy(() => import('@/app/[locale]/errors/page').then(m => ({ default: m.default })))
+const AppsContent = lazy(() => import('@/app/[locale]/apps/page').then(m => ({ default: m.default })))
+const ServicesContent = lazy(() => import('@/app/[locale]/services/page').then(m => ({ default: m.default })))
+
+function TabSkeleton() {
+  return (
+    <div style={{ padding: 32, textAlign: 'center', color: '#87867f' }}>
+      載入中...
+    </div>
+  )
+}
+
+export default function ObservabilityPage({ params }: { params: { locale: string } }) {
+  const t = useTranslations('nav')
+
+  const tabs: TabConfig[] = [
+    {
+      id: 'monitoring',
+      label: t('monitoring'),
+      content: (
+        <Suspense fallback={<TabSkeleton />}>
+          <MonitoringContent params={params} />
+        </Suspense>
+      ),
+    },
+    {
+      id: 'apm',
+      label: t('apm'),
+      content: (
+        <Suspense fallback={<TabSkeleton />}>
+          <APMContent params={params} />
+        </Suspense>
+      ),
+    },
+    {
+      id: 'errors',
+      label: t('errors'),
+      content: (
+        <Suspense fallback={<TabSkeleton />}>
+          <ErrorsContent params={params} />
+        </Suspense>
+      ),
+    },
+    {
+      id: 'apps',
+      label: t('apps'),
+      content: (
+        <Suspense fallback={<TabSkeleton />}>
+          <AppsContent params={params} />
+        </Suspense>
+      ),
+    },
+    {
+      id: 'services',
+      label: t('services'),
+      content: (
+        <Suspense fallback={<TabSkeleton />}>
+          <ServicesContent params={params} />
+        </Suspense>
+      ),
+    },
+  ]
+
+  return (
+    <AppLayout locale={params.locale}>
+      <PageTabs tabs={tabs} defaultTab="monitoring" syncWithUrl={true} />
+    </AppLayout>
+  )
+}
diff --git a/apps/web/src/app/[locale]/operations/page.tsx b/apps/web/src/app/[locale]/operations/page.tsx
new file mode 100644
index 00000000..3f28c4ab
--- /dev/null
+++ b/apps/web/src/app/[locale]/operations/page.tsx
@@ -0,0 +1,41 @@
+'use client'
+
+/**
+ * 營運 (/operations) — Sprint 5 整合頁面
+ * 整合: 部署管理 + 工單 + 成本分析 + 行動日誌 + 計費
+ * 零假數據: 全部載入現有頁面內容
+ * 建立時間: 2026-04-08 (台北時區)
+ */
+
+import { lazy, Suspense } from 'react'
+import { useTranslations } from 'next-intl'
+import { AppLayout } from '@/components/layout'
+import { PageTabs, type TabConfig } from '@/components/layout/page-tabs'
+
+const DeploymentsContent = lazy(() => import('@/app/[locale]/deployments/page'))
+const TicketsContent = lazy(() => import('@/app/[locale]/tickets/page'))
+const CostContent = lazy(() => import('@/app/[locale]/cost/page'))
+const ActionLogsContent = lazy(() => import('@/app/[locale]/action-logs/page'))
+const BillingContent = lazy(() => import('@/app/[locale]/billing/page'))
+
+function Loading() {
+  return <div style={{ padding: 32, textAlign: 'center', color: '#87867f' }}>載入中...</div>
+}
+
+export default function OperationsPage({ params }: { params: { locale: string } }) {
+  const t = useTranslations('nav')
+
+  const tabs: TabConfig[] = [
+    { id: 'deployments', label: t('deployments'), content: <Suspense fallback={<Loading />}><DeploymentsContent params={params} /></Suspense> },
+    { id: 'tickets', label: t('tickets'), content: <Suspense fallback={<Loading />}><TicketsContent params={params} /></Suspense> },
+    { id: 'cost', label: t('cost'), content: <Suspense fallback={<Loading />}><CostContent params={params} /></Suspense> },
+    { id: 'logs', label: t('actions'), content: <Suspense fallback={<Loading />}><ActionLogsContent params={params} /></Suspense> },
+    { id: 'billing', label: t('billing'), content: <Suspense fallback={<Loading />}><BillingContent params={params} /></Suspense> },
+  ]
+
+  return (
+    <AppLayout locale={params.locale}>
+      <PageTabs tabs={tabs} defaultTab="deployments" syncWithUrl={true} />
+    </AppLayout>
+  )
+}
diff --git a/apps/web/src/app/[locale]/security-compliance/page.tsx b/apps/web/src/app/[locale]/security-compliance/page.tsx
new file mode 100644
index 00000000..721d8139
--- /dev/null
+++ b/apps/web/src/app/[locale]/security-compliance/page.tsx
@@ -0,0 +1,35 @@
+'use client'
+
+/**
+ * 安全合規 (/security-compliance) — Sprint 5 整合頁面
+ * 整合: 安全掃描 + 合規報告
+ * 零假數據: 全部載入現有頁面內容
+ * 建立時間: 2026-04-08 (台北時區)
+ */
+
+import { lazy, Suspense } from 'react'
+import { useTranslations } from 'next-intl'
+import { AppLayout } from '@/components/layout'
+import { PageTabs, type TabConfig } from '@/components/layout/page-tabs'
+
+const SecurityContent = lazy(() => import('@/app/[locale]/security/page'))
+const ComplianceContent = lazy(() => import('@/app/[locale]/compliance/page'))
+
+function Loading() {
+  return <div style={{ padding: 32, textAlign: 'center', color: '#87867f' }}>載入中...</div>
+}
+
+export default function SecurityCompliancePage({ params }: { params: { locale: string } }) {
+  const t = useTranslations('nav')
+
+  const tabs: TabConfig[] = [
+    { id: 'security', label: t('security'), content: <Suspense fallback={<Loading />}><SecurityContent params={params} /></Suspense> },
+    { id: 'compliance', label: t('compliance'), content: <Suspense fallback={<Loading />}><ComplianceContent params={params} /></Suspense> },
+  ]
+
+  return (
+    <AppLayout locale={params.locale}>
+      <PageTabs tabs={tabs} defaultTab="security" syncWithUrl={true} />
+    </AppLayout>
+  )
+}
diff --git a/apps/web/src/components/layout/sidebar.tsx b/apps/web/src/components/layout/sidebar.tsx
index 0dcf7337..7a53adcd 100644
--- a/apps/web/src/components/layout/sidebar.tsx
+++ b/apps/web/src/components/layout/sidebar.tsx
@@ -80,12 +80,12 @@ const NAV_SECTIONS: NavSection[] = [
     sectionKey: 'main',
     sectionLabel: '',
     items: [
-      { id: 'command-center',      href: '/',               labelKey: 'commandCenter',     Icon: LayoutDashboard },
-      { id: 'observability',       href: '/monitoring',      labelKey: 'observability',     Icon: Monitor },
-      { id: 'automation',          href: '/auto-repair',     labelKey: 'automation',        Icon: Wrench },
-      { id: 'operations',          href: '/deployments',     labelKey: 'operations',        Icon: Package },
-      { id: 'security-compliance', href: '/security',        labelKey: 'securityCompliance',Icon: Shield },
-      { id: 'knowledge',           href: '/knowledge-base',  labelKey: 'knowledge',         Icon: BookOpen },
+      { id: 'command-center',      href: '/',                      labelKey: 'commandCenter',     Icon: LayoutDashboard },
+      { id: 'observability',       href: '/observability',          labelKey: 'observability',     Icon: Monitor },
+      { id: 'automation',          href: '/automation',             labelKey: 'automation',        Icon: Wrench },
+      { id: 'operations',          href: '/operations',             labelKey: 'operations',        Icon: Package },
+      { id: 'security-compliance', href: '/security-compliance',    labelKey: 'securityCompliance',Icon: Shield },
+      { id: 'knowledge',           href: '/knowledge',              labelKey: 'knowledge',         Icon: BookOpen },
     ],
   },
   {