diff --git a/admin/src/App.vue b/admin/src/App.vue
index c2f465d..23ac712 100644
--- a/admin/src/App.vue
+++ b/admin/src/App.vue
@@ -13,6 +13,7 @@
           <button class="nav-item" :class="{ active: activeModule === 'platformApps' }" type="button" @click="activeModule = 'platformApps'"><PanelsTopLeft :size="18" /><span>小程序租户</span></button>
           <button class="nav-item" :class="{ active: activeModule === 'content' }" type="button" @click="activeModule = 'content'"><Images :size="18" /><span>广告装修</span></button>
           <button class="nav-item" :class="{ active: activeModule === 'franchise' }" type="button" @click="activeModule = 'franchise'"><Handshake :size="18" /><span>加盟跟进</span></button>
+          <button class="nav-item" :class="{ active: activeModule === 'system' }" type="button" @click="activeModule = 'system'"><ScrollText :size="18" /><span>日志配置</span></button>
           <button
             class="nav-item"
             :class="{ active: activeModule === 'overview' }"
@@ -130,6 +131,11 @@
           :session="session"
         />
 
+        <LogsSystemPanel
+          v-else-if="activeModule === 'system'"
+          :session="session"
+        />
+
         <StoresRoomsPanel
           v-else-if="activeModule === 'stores'"
           :session="session"
@@ -329,6 +335,7 @@ import {
   PanelsTopLeft,
   RadioTower,
   RotateCcw,
+  ScrollText,
   Save,
   Send,
   Sparkles,
@@ -352,6 +359,7 @@ import DevicesPanel from './components/DevicesPanel.vue';
 import PlatformAppsPanel from './components/PlatformAppsPanel.vue';
 import ContentManagementPanel from './components/ContentManagementPanel.vue';
 import FranchisePanel from './components/FranchisePanel.vue';
+import LogsSystemPanel from './components/LogsSystemPanel.vue';
 import {
   ApiError,
   assignCleaningTask,
@@ -388,7 +396,7 @@ import { money } from './format';
 
 const savedToken = ref(localStorage.getItem('qipai.admin.token') || '');
 const tokenDraft = ref(savedToken.value);
-const activeModule = ref<'overview' | 'platformApps' | 'content' | 'franchise' | 'stores' | 'orders' | 'devices' | 'payments' | 'thirdParty' | 'people' | 'cleaning'>('overview');
+const activeModule = ref<'overview' | 'platformApps' | 'content' | 'franchise' | 'system' | 'stores' | 'orders' | 'devices' | 'payments' | 'thirdParty' | 'people' | 'cleaning'>('overview');
 const activeTab = ref('tasks');
 const lastError = ref('');
 const lastMessage = ref('');
@@ -402,6 +410,7 @@ const activeModuleMeta = computed(() => ({
   platformApps: { stage: 'M08-D', title: '多小程序与租户品牌配置' },
   content: { stage: 'M08-D', title: '广告投放与门店装修' },
   franchise: { stage: 'M08-D', title: '加盟申请与跟进运营' },
+  system: { stage: 'M08-D', title: '安全审计与系统配置' },
   stores: { stage: 'M08-D', title: '门店与房间管理' },
   orders: { stage: 'M08-D', title: '订单筛选与运营处置' },
   devices: { stage: 'M08-D', title: '设备资产、拓扑与控制' },
diff --git a/admin/src/api.ts b/admin/src/api.ts
index 0cc3b91..ce133c2 100644
--- a/admin/src/api.ts
+++ b/admin/src/api.ts
@@ -1,6 +1,7 @@
 import type {
   Advertisement,
   AdvertisementInput,
+  AuditLog,
   CleaningSettlement,
   CleaningSettlementDetail,
   CleaningStatistics,
@@ -33,6 +34,7 @@ import type {
   PayoutStateFilter,
   StaffRole,
   SettlementStatus,
+  SystemOverview,
   TaskStatus,
   TransferMode,
   RoomConfigurationStatus,
@@ -532,6 +534,31 @@ export function addFranchiseFollowUp(session: ApiSession, applicationId: string,
     { method: 'POST', body: JSON.stringify(input) });
 }
 
+export function listAuditLogs(session: ApiSession, input: {
+  page: number; pageSize: number; action?: string; resourceType?: string; search?: string;
+  from?: string; to?: string;
+}) {
+  const params = new URLSearchParams({ page: String(input.page), pageSize: String(input.pageSize) });
+  if (input.action) params.set('action', input.action);
+  if (input.resourceType) params.set('resourceType', input.resourceType);
+  if (input.search) params.set('search', input.search);
+  if (input.from) params.set('from', input.from);
+  if (input.to) params.set('to', input.to);
+  return request<PageResult<AuditLog>>(session, `/audit-logs?${params}`);
+}
+
+export function getSystemOverview(session: ApiSession) {
+  return request<SystemOverview>(session, '/system/overview');
+}
+
+export function updateTenantSystemConfig(session: ApiSession, input: {
+  name: string; timezone: string; status?: 'ACTIVE' | 'DISABLED';
+}) {
+  return request<{ tenantId: string; updated: boolean }>(session, '/system/tenant', {
+    method: 'PUT', body: JSON.stringify(input)
+  });
+}
+
 export function createStaffUser(
   session: ApiSession,
   input: { nickname: string; phone: string; note?: string; roles: StaffRole[]; storeIds: string[] }
diff --git a/admin/src/components/LogsSystemPanel.vue b/admin/src/components/LogsSystemPanel.vue
new file mode 100644
index 0000000..2e066b3
--- /dev/null
+++ b/admin/src/components/LogsSystemPanel.vue
@@ -0,0 +1,108 @@
+<template>
+  <section class="system-page">
+    <el-alert v-if="lastError" :title="lastError" type="error" show-icon closable @close="lastError = ''" />
+    <el-tabs v-model="activeTab" class="panel system-tabs">
+      <el-tab-pane label="安全审计" name="audit">
+        <header class="panel-toolbar">
+          <div><p class="section-kicker">M08-D · 可追溯运营</p><h3>安全审计日志</h3></div>
+          <div class="toolbar-actions">
+            <el-button :icon="Download" :disabled="page.items.length === 0" @click="exportCsv">导出当前页</el-button>
+            <el-button :icon="RefreshCw" :loading="auditLoading" @click="loadAudit">刷新</el-button>
+          </div>
+        </header>
+        <div class="audit-filters">
+          <el-input v-model="filters.search" clearable placeholder="操作、资源、追踪号或操作人" @keyup.enter="applyFilters" />
+          <el-input v-model="filters.action" clearable placeholder="操作代码，如 ORDER_CREATED" @keyup.enter="applyFilters" />
+          <el-input v-model="filters.resourceType" clearable placeholder="资源类型，如 ORDER" @keyup.enter="applyFilters" />
+          <el-date-picker v-model="dateRange" type="datetimerange" range-separator="至" start-placeholder="开始时间" end-placeholder="结束时间" />
+          <el-button type="primary" @click="applyFilters">筛选</el-button>
+        </div>
+        <el-table v-loading="auditLoading" :data="page.items" row-key="id" class="data-table">
+          <el-table-column label="时间" min-width="168"><template #default="{ row }">{{ shortDate(row.createdAt) }}</template></el-table-column>
+          <el-table-column label="操作" min-width="210"><template #default="{ row }"><div class="stack"><strong>{{ row.action }}</strong><span>{{ row.resourceType }}{{ row.resourceId ? ` #${row.resourceId}` : '' }}</span></div></template></el-table-column>
+          <el-table-column label="操作人" min-width="150"><template #default="{ row }"><div class="stack"><strong>{{ row.actorName || row.actorType }}</strong><span>{{ row.actorId ? `#${row.actorId}` : '系统' }}</span></div></template></el-table-column>
+          <el-table-column label="来源" min-width="150"><template #default="{ row }"><div class="stack"><span>{{ row.ip || '-' }}</span><small>{{ compactAgent(row.userAgent) }}</small></div></template></el-table-column>
+          <el-table-column label="追踪号" min-width="180" show-overflow-tooltip prop="traceId" />
+          <el-table-column label="详情" width="92" fixed="right"><template #default="{ row }"><el-button size="small" :icon="Eye" @click="selected = row; drawer = true">查看</el-button></template></el-table-column>
+        </el-table>
+        <el-pagination v-model:current-page="page.page" :page-size="page.pageSize" :total="page.total" layout="prev, pager, next, total" @current-change="loadAudit" />
+      </el-tab-pane>
+
+      <el-tab-pane label="系统配置" name="system">
+        <div v-loading="systemLoading" class="system-workspace">
+          <section class="system-metrics">
+            <span><small>门店</small><strong>{{ overview?.counts.storeCount ?? 0 }}</strong></span>
+            <span><small>用户</small><strong>{{ overview?.counts.userCount ?? 0 }}</strong></span>
+            <span><small>活跃会话</small><strong>{{ overview?.counts.activeSessionCount ?? 0 }}</strong></span>
+            <span><small>今日审计</small><strong>{{ overview?.counts.auditTodayCount ?? 0 }}</strong></span>
+          </section>
+          <section class="system-config-grid">
+            <article class="config-card">
+              <header><div><p class="section-kicker">租户配置</p><h3>{{ overview?.tenant.code || '当前租户' }}</h3></div><el-tag :type="tenantStatusType">{{ overview?.tenant.status || '-' }}</el-tag></header>
+              <el-form label-position="top">
+                <el-form-item label="租户名称"><el-input v-model="tenantForm.name" maxlength="128" /></el-form-item>
+                <el-form-item label="默认时区"><el-input v-model="tenantForm.timezone" placeholder="Asia/Shanghai" /></el-form-item>
+                <el-form-item label="平台状态操作">
+                  <div class="status-control"><el-switch v-model="applyStatus" active-text="本次更新状态" /><el-select v-model="tenantForm.status" :disabled="!applyStatus"><el-option label="启用" value="ACTIVE" /><el-option label="停用" value="DISABLED" /></el-select></div>
+                  <small class="field-help">只有平台管理员可以变更租户启停状态；普通租户管理员请保持关闭。</small>
+                </el-form-item>
+              </el-form>
+              <el-button type="primary" :loading="saving" @click="saveConfig">保存系统配置</el-button>
+            </article>
+            <article class="config-card migration-card">
+              <p class="section-kicker">数据库状态</p><h3>Schema 迁移</h3>
+              <el-descriptions :column="1" border>
+                <el-descriptions-item label="最新版本">{{ overview?.latestMigration?.version || '-' }}</el-descriptions-item>
+                <el-descriptions-item label="迁移名称">{{ overview?.latestMigration?.name || '-' }}</el-descriptions-item>
+                <el-descriptions-item label="执行时间">{{ overview?.latestMigration?.appliedAt ? shortDate(overview.latestMigration.appliedAt) : '-' }}</el-descriptions-item>
+                <el-descriptions-item label="小程序绑定">{{ overview?.counts.appBindingCount ?? 0 }}</el-descriptions-item>
+              </el-descriptions>
+              <el-button :icon="RefreshCw" :loading="systemLoading" @click="loadSystem">刷新运行状态</el-button>
+            </article>
+          </section>
+        </div>
+      </el-tab-pane>
+    </el-tabs>
+
+    <el-drawer v-model="drawer" title="审计事件详情" size="min(640px, 96vw)">
+      <el-descriptions v-if="selected" :column="1" border>
+        <el-descriptions-item label="操作">{{ selected.action }}</el-descriptions-item>
+        <el-descriptions-item label="资源">{{ selected.resourceType }} {{ selected.resourceId || '' }}</el-descriptions-item>
+        <el-descriptions-item label="追踪号">{{ selected.traceId }}</el-descriptions-item>
+        <el-descriptions-item label="操作人">{{ selected.actorName || selected.actorType }} {{ selected.actorId || '' }}</el-descriptions-item>
+        <el-descriptions-item label="脱敏来源 IP">{{ selected.ip || '-' }}</el-descriptions-item>
+      </el-descriptions>
+      <h4>脱敏元数据</h4><pre class="audit-metadata">{{ prettyMetadata }}</pre>
+    </el-drawer>
+  </section>
+</template>
+
+<script setup lang="ts">
+import { computed, reactive, ref, watch } from 'vue';
+import { ElMessage } from 'element-plus';
+import { Download, Eye, RefreshCw } from '@lucide/vue';
+import { ApiError, getSystemOverview, listAuditLogs, updateTenantSystemConfig, type ApiSession } from '../api';
+import { shortDate } from '../format';
+import type { AuditLog, PageResult, SystemOverview } from '../types';
+
+const props = defineProps<{ session: ApiSession }>();
+const activeTab = ref('audit'); const auditLoading = ref(false); const systemLoading = ref(false); const saving = ref(false);
+const lastError = ref(''); const drawer = ref(false); const selected = ref<AuditLog | null>(null);
+const overview = ref<SystemOverview | null>(null); const dateRange = ref<[Date, Date] | null>(null);
+const applyStatus = ref(false);
+const filters = reactive({ search: '', action: '', resourceType: '' });
+const tenantForm = reactive({ name: '', timezone: 'Asia/Shanghai', status: 'ACTIVE' as 'ACTIVE' | 'DISABLED' });
+const page = reactive<PageResult<AuditLog>>({ items: [], total: 0, page: 1, pageSize: 20 });
+const prettyMetadata = computed(() => JSON.stringify(selected.value?.metadata ?? {}, null, 2));
+const tenantStatusType = computed(() => overview.value?.tenant.status === 'ACTIVE' ? 'success' : 'danger');
+
+function captureError(error: unknown) { lastError.value = error instanceof ApiError ? `${error.code}${error.traceId ? ` · ${error.traceId}` : ''}` : error instanceof Error ? error.message : '操作失败'; }
+async function loadAudit() { if (!props.session.token) return; auditLoading.value = true; lastError.value = ''; try { const result = await listAuditLogs(props.session, { page: page.page, pageSize: page.pageSize, search: filters.search.trim() || undefined, action: filters.action.trim() || undefined, resourceType: filters.resourceType.trim() || undefined, from: dateRange.value?.[0].toISOString(), to: dateRange.value?.[1].toISOString() }); Object.assign(page, result); } catch (error) { captureError(error); } finally { auditLoading.value = false; } }
+async function loadSystem() { if (!props.session.token) return; systemLoading.value = true; lastError.value = ''; try { overview.value = await getSystemOverview(props.session); Object.assign(tenantForm, { name: overview.value.tenant.name, timezone: overview.value.tenant.timezone, status: overview.value.tenant.status }); applyStatus.value = false; } catch (error) { captureError(error); } finally { systemLoading.value = false; } }
+function applyFilters() { page.page = 1; void loadAudit(); }
+async function saveConfig() { if (!tenantForm.name.trim() || !tenantForm.timezone.trim()) return ElMessage.warning('请填写租户名称和有效时区'); saving.value = true; try { await updateTenantSystemConfig(props.session, { name: tenantForm.name.trim(), timezone: tenantForm.timezone.trim(), status: applyStatus.value ? tenantForm.status : undefined }); ElMessage.success('系统配置已保存'); await loadSystem(); } catch (error) { captureError(error); } finally { saving.value = false; } }
+function compactAgent(value: string) { return value ? value.slice(0, 36) : '-'; }
+function csvCell(value: unknown) { return `"${String(value ?? '').replace(/"/g, '""')}"`; }
+function exportCsv() { const rows = [['时间', '操作', '资源类型', '资源ID', '操作人', '来源IP', '追踪号'], ...page.items.map((item) => [item.createdAt, item.action, item.resourceType, item.resourceId, item.actorName || item.actorType, item.ip, item.traceId])]; const blob = new Blob([`\ufeff${rows.map((row) => row.map(csvCell).join(',')).join('\n')}`], { type: 'text/csv;charset=utf-8' }); const url = URL.createObjectURL(blob); const anchor = document.createElement('a'); anchor.href = url; anchor.download = `audit-logs-${new Date().toISOString().slice(0, 10)}.csv`; anchor.click(); URL.revokeObjectURL(url); }
+watch(() => props.session.token, (token) => { if (token) void Promise.all([loadAudit(), loadSystem()]); }, { immediate: true });
+</script>
diff --git a/admin/src/styles.css b/admin/src/styles.css
index 7ab896e..ee789ca 100644
--- a/admin/src/styles.css
+++ b/admin/src/styles.css
@@ -239,6 +239,102 @@
   gap: 16px;
 }
 
+.system-page,
+.system-workspace {
+  display: grid;
+  gap: 16px;
+}
+
+.system-tabs {
+  padding: 0 18px 18px;
+}
+
+.audit-filters {
+  display: grid;
+  grid-template-columns: minmax(210px, 1fr) 210px 180px minmax(320px, 1.2fr) auto;
+  gap: 10px;
+  margin-bottom: 16px;
+}
+
+.system-metrics {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 12px;
+}
+
+.system-metrics > span {
+  display: grid;
+  gap: 6px;
+  padding: 16px 18px;
+  border: 1px solid #dbe3ec;
+  border-radius: 14px;
+  background: #f8fafc;
+}
+
+.system-metrics small,
+.field-help {
+  color: #66758a;
+}
+
+.system-metrics strong {
+  font-size: 26px;
+}
+
+.system-config-grid {
+  display: grid;
+  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
+  gap: 16px;
+}
+
+.config-card {
+  padding: 18px;
+  border: 1px solid #dbe3ec;
+  border-radius: 14px;
+  background: #fff;
+}
+
+.config-card > header,
+.status-control {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.config-card h3 {
+  margin-top: 4px;
+}
+
+.status-control {
+  width: 100%;
+}
+
+.status-control .el-select {
+  width: 150px;
+}
+
+.field-help {
+  display: block;
+  margin-top: 7px;
+  font-size: 12px;
+}
+
+.migration-card .el-button {
+  margin-top: 16px;
+}
+
+.audit-metadata {
+  overflow: auto;
+  min-height: 160px;
+  padding: 14px;
+  border-radius: 10px;
+  background: #14202b;
+  color: #d9e7ef;
+  font: 12px/1.6 ui-monospace, SFMono-Regular, Consolas, monospace;
+  white-space: pre-wrap;
+  word-break: break-word;
+}
+
 .franchise-metrics {
   display: grid;
   grid-template-columns: repeat(4, minmax(0, 1fr));
@@ -321,7 +417,10 @@
 
 @media (max-width: 980px) {
   .franchise-metrics,
-  .franchise-filters {
+  .franchise-filters,
+  .system-metrics,
+  .audit-filters,
+  .system-config-grid {
     grid-template-columns: repeat(2, minmax(0, 1fr));
   }
 }
@@ -329,6 +428,9 @@
 @media (max-width: 560px) {
   .franchise-metrics,
   .franchise-filters,
+  .system-metrics,
+  .audit-filters,
+  .system-config-grid,
   .follow-up-form .el-form {
     grid-template-columns: 1fr;
   }
diff --git a/admin/src/types.ts b/admin/src/types.ts
index 25a1274..c481146 100644
--- a/admin/src/types.ts
+++ b/admin/src/types.ts
@@ -539,6 +539,42 @@ export interface FranchiseApplicationDetail {
   followUps: FranchiseFollowUp[];
 }
 
+export interface AuditLog {
+  id: string;
+  tenantId: string;
+  actorType: string;
+  actorId: string | null;
+  actorName: string | null;
+  action: string;
+  resourceType: string;
+  resourceId: string | null;
+  traceId: string;
+  ip: string;
+  userAgent: string;
+  metadata: unknown;
+  createdAt: string;
+}
+
+export interface SystemOverview {
+  tenant: {
+    id: string;
+    code: string;
+    name: string;
+    status: 'ACTIVE' | 'DISABLED';
+    timezone: string;
+    createdAt: string;
+    updatedAt: string;
+  };
+  counts: {
+    storeCount: number;
+    userCount: number;
+    activeSessionCount: number;
+    appBindingCount: number;
+    auditTodayCount: number;
+  };
+  latestMigration: null | { version: string; name: string; appliedAt: string };
+}
+
 export interface CleaningTask {
   id: string;
   taskNo: string;
diff --git a/backend/package.json b/backend/package.json
index d74b5a6..1b8af78 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -17,7 +17,7 @@
     "db:migrate:verify": "npm run build && node dist/db/migrate-cli.js verify",
     "db:migrate:down": "npm run build && node dist/db/migrate-cli.js down",
     "test:mysql:migration": "npm run build && node tests/mysql-migration-roundtrip.test.mjs",
-    "test": "npm run build && node tests/backend-contract.test.mjs && node tests/mqtt-service.test.mjs && node tests/migration-contract.test.mjs && node tests/mysql-pool-contract.test.mjs && node tests/migration-runner.test.mjs && node tests/legacy-money.test.mjs && node tests/legacy-read-repository.test.mjs && node tests/task-repository.test.mjs && node tests/platform-config-repository.test.mjs && node tests/auth.test.mjs && node tests/rbac.test.mjs && node tests/user-management.test.mjs && node tests/store-room.test.mjs && node tests/content-management.test.mjs && node tests/franchise.test.mjs && node tests/store-discovery.test.mjs && node tests/store-access.test.mjs && node tests/pricing.test.mjs && node tests/order-state.test.mjs && node tests/order-query.test.mjs && node tests/order-management.test.mjs && node tests/order-share.test.mjs && node tests/payment.test.mjs && node tests/wechat-pay.test.mjs && node tests/third-party.test.mjs && node tests/profit-sharing.test.mjs && node tests/device.test.mjs && node tests/iot-protocol.test.mjs && node tests/device-control.test.mjs && node tests/order-device-automation.test.mjs && node tests/hardware-smoke-runner.test.mjs && node tests/wallet-ledger.test.mjs && node tests/recharge-service.test.mjs && node tests/recharge-route.test.mjs && node tests/marketing-benefit-service.test.mjs && node tests/member-profile-service.test.mjs && node tests/member-profile-route.test.mjs && node tests/cleaning-payout-service.test.mjs && node tests/cleaning-route.test.mjs && node tests/business-statistics.test.mjs"
+    "test": "npm run build && node tests/backend-contract.test.mjs && node tests/mqtt-service.test.mjs && node tests/migration-contract.test.mjs && node tests/mysql-pool-contract.test.mjs && node tests/migration-runner.test.mjs && node tests/legacy-money.test.mjs && node tests/legacy-read-repository.test.mjs && node tests/task-repository.test.mjs && node tests/platform-config-repository.test.mjs && node tests/auth.test.mjs && node tests/rbac.test.mjs && node tests/user-management.test.mjs && node tests/store-room.test.mjs && node tests/content-management.test.mjs && node tests/franchise.test.mjs && node tests/system-operations.test.mjs && node tests/store-discovery.test.mjs && node tests/store-access.test.mjs && node tests/pricing.test.mjs && node tests/order-state.test.mjs && node tests/order-query.test.mjs && node tests/order-management.test.mjs && node tests/order-share.test.mjs && node tests/payment.test.mjs && node tests/wechat-pay.test.mjs && node tests/third-party.test.mjs && node tests/profit-sharing.test.mjs && node tests/device.test.mjs && node tests/iot-protocol.test.mjs && node tests/device-control.test.mjs && node tests/order-device-automation.test.mjs && node tests/hardware-smoke-runner.test.mjs && node tests/wallet-ledger.test.mjs && node tests/recharge-service.test.mjs && node tests/recharge-route.test.mjs && node tests/marketing-benefit-service.test.mjs && node tests/member-profile-service.test.mjs && node tests/member-profile-route.test.mjs && node tests/cleaning-payout-service.test.mjs && node tests/cleaning-route.test.mjs && node tests/business-statistics.test.mjs"
   },
   "dependencies": {
     "@fastify/cors": "^11.2.0",
diff --git a/backend/src/app.ts b/backend/src/app.ts
index c665c0d..d04bff3 100644
--- a/backend/src/app.ts
+++ b/backend/src/app.ts
@@ -57,6 +57,10 @@ import {
   type BusinessStatisticsRouteOptions
 } from './routes/business-statistics.js';
 import { registerFranchiseRoutes, type FranchiseRouteOptions } from './routes/franchise.js';
+import {
+  registerSystemOperationsRoutes,
+  type SystemOperationsRouteOptions
+} from './routes/system-operations.js';
 
 export interface BuildAppOptions {
   config?: AppConfig;
@@ -83,6 +87,7 @@ export interface BuildAppOptions {
   cleaning?: CleaningRouteOptions;
   businessStatistics?: BusinessStatisticsRouteOptions;
   franchise?: FranchiseRouteOptions;
+  systemOperations?: SystemOperationsRouteOptions;
 }
 
 declare module 'fastify' {
@@ -193,6 +198,9 @@ export async function buildApp(options: BuildAppOptions = {}): Promise<FastifyIn
   if (options.franchise) {
     await registerFranchiseRoutes(app, options.franchise);
   }
+  if (options.systemOperations) {
+    await registerSystemOperationsRoutes(app, options.systemOperations);
+  }
 
   return app;
 }
diff --git a/backend/src/operations/system-operations-repository.ts b/backend/src/operations/system-operations-repository.ts
new file mode 100644
index 0000000..38fb416
--- /dev/null
+++ b/backend/src/operations/system-operations-repository.ts
@@ -0,0 +1,128 @@
+import type { PoolConnection, ResultSetHeader, RowDataPacket } from 'mysql2/promise';
+import type { ManagementActor } from '../auth/user-management-repository.js';
+import type { MySqlPool } from '../db/mysql.js';
+
+export interface AuditLogQuery {
+  tenantId: string; page: number; pageSize: number; action?: string; resourceType?: string;
+  actorId?: string; search?: string; from?: Date; to?: Date;
+}
+
+interface AuditRow extends RowDataPacket {
+  id: string; tenantId: string; actorType: string; actorId: string | null; actorName: string | null;
+  action: string; resourceType: string; resourceId: string | null; traceId: string;
+  ip: string; userAgent: string; metadata: unknown; createdAt: Date;
+}
+
+export class SystemOperationsError extends Error {
+  constructor(public readonly code: string) { super(code); }
+}
+
+export class SystemOperationsRepository {
+  constructor(private readonly pool: MySqlPool) {}
+
+  async listAuditLogs(input: AuditLogQuery) {
+    const page = Number.isSafeInteger(input.page) && input.page > 0 ? input.page : 1;
+    const pageSize = Number.isSafeInteger(input.pageSize)
+      ? Math.min(100, Math.max(1, input.pageSize)) : 20;
+    const where = ['l.tenant_id = ?']; const params: Array<string | Date> = [input.tenantId];
+    if (input.action) { where.push('l.action = ?'); params.push(input.action); }
+    if (input.resourceType) { where.push('l.resource_type = ?'); params.push(input.resourceType); }
+    if (input.actorId) { where.push('l.actor_id = ?'); params.push(input.actorId); }
+    if (input.from) { where.push('l.created_at >= ?'); params.push(input.from); }
+    if (input.to) { where.push('l.created_at < ?'); params.push(input.to); }
+    if (input.search) {
+      where.push('(l.action LIKE ? OR l.resource_type LIKE ? OR l.trace_id LIKE ? OR u.nickname LIKE ?)');
+      const term = `%${input.search}%`; params.push(term, term, term, term);
+    }
+    const [counts] = await this.pool.execute<Array<RowDataPacket & { total: number }>>(
+      `SELECT COUNT(*) AS total FROM qipai_audit_logs l
+       LEFT JOIN qipai_users u ON u.id = l.actor_id WHERE ${where.join(' AND ')}`, params
+    );
+    const offset = (page - 1) * pageSize;
+    const [rows] = await this.pool.execute<AuditRow[]>(
+      `SELECT l.id, l.tenant_id AS tenantId, l.actor_type AS actorType,
+              l.actor_id AS actorId, u.nickname AS actorName, l.action,
+              l.resource_type AS resourceType, l.resource_id AS resourceId,
+              l.trace_id AS traceId, l.ip, l.user_agent AS userAgent,
+              l.metadata, l.created_at AS createdAt
+       FROM qipai_audit_logs l LEFT JOIN qipai_users u ON u.id = l.actor_id
+       WHERE ${where.join(' AND ')} ORDER BY l.id DESC
+       LIMIT ${pageSize} OFFSET ${offset}`, params
+    );
+    return { items: rows.map((row) => ({ ...row, id: String(row.id), tenantId: String(row.tenantId),
+      actorId: row.actorId === null ? null : String(row.actorId),
+      resourceId: row.resourceId === null ? null : String(row.resourceId),
+      ip: maskIp(row.ip), metadata: sanitizeMetadata(parseJson(row.metadata)) })),
+      total: Number(counts[0]?.total ?? 0), page, pageSize };
+  }
+
+  async getSystemOverview(tenantId: string) {
+    const [tenants] = await this.pool.execute<RowDataPacket[]>(
+      `SELECT id, code, name, status, timezone, created_at AS createdAt, updated_at AS updatedAt
+       FROM qipai_tenants WHERE id = ? AND deleted_at IS NULL`, [tenantId]
+    );
+    if (!tenants[0]) throw new SystemOperationsError('SYSTEM_TENANT_NOT_FOUND');
+    const [counts] = await this.pool.execute<RowDataPacket[]>(
+      `SELECT
+        (SELECT COUNT(*) FROM qipai_stores WHERE tenant_id = ? AND deleted_at IS NULL) AS storeCount,
+        (SELECT COUNT(*) FROM qipai_users WHERE tenant_id = ? AND deleted_at IS NULL) AS userCount,
+        (SELECT COUNT(*) FROM qipai_auth_sessions WHERE tenant_id = ? AND revoked_at IS NULL AND expires_at > UTC_TIMESTAMP(3)) AS activeSessionCount,
+        (SELECT COUNT(*) FROM qipai_tenant_apps WHERE tenant_id = ? AND deleted_at IS NULL) AS appBindingCount,
+        (SELECT COUNT(*) FROM qipai_audit_logs WHERE tenant_id = ? AND created_at >= UTC_DATE()) AS auditTodayCount`,
+      [tenantId, tenantId, tenantId, tenantId, tenantId]
+    );
+    const [migrations] = await this.pool.execute<RowDataPacket[]>(
+      'SELECT version, name, applied_at AS appliedAt FROM qipai_schema_migrations ORDER BY version DESC LIMIT 1'
+    );
+    return { tenant: { ...tenants[0], id: String(tenants[0].id) },
+      counts: Object.fromEntries(Object.entries(counts[0] ?? {}).map(([key, value]) => [key, Number(value)])),
+      latestMigration: migrations[0] ?? null };
+  }
+
+  async updateTenant(actor: ManagementActor, tenantId: string, input: {
+    name: string; timezone: string; status?: 'ACTIVE' | 'DISABLED';
+  }) {
+    return this.transaction(async (connection) => {
+      const [rows] = await connection.execute<Array<RowDataPacket & { name: string; timezone: string; status: string }>>(
+        'SELECT name, timezone, status FROM qipai_tenants WHERE id = ? AND deleted_at IS NULL FOR UPDATE', [tenantId]
+      );
+      if (!rows[0]) throw new SystemOperationsError('SYSTEM_TENANT_NOT_FOUND');
+      await connection.execute<ResultSetHeader>(
+        `UPDATE qipai_tenants SET name = ?, timezone = ?, status = COALESCE(?, status)
+         WHERE id = ? AND deleted_at IS NULL`, [input.name, input.timezone, input.status ?? null, tenantId]
+      );
+      await connection.execute(
+        `INSERT INTO qipai_audit_logs
+          (tenant_id, actor_type, actor_id, action, resource_type, resource_id,
+           trace_id, ip, user_agent, metadata) VALUES (?, 'USER', ?, 'TENANT_SYSTEM_CONFIG_UPDATED',
+           'TENANT', ?, ?, ?, ?, ?)`,
+        [tenantId, actor.userId, tenantId, actor.traceId, actor.ip, actor.userAgent.slice(0, 255),
+          JSON.stringify({ before: rows[0], after: input })]
+      );
+      return { tenantId, updated: true };
+    });
+  }
+
+  private async transaction<T>(work: (connection: PoolConnection) => Promise<T>) {
+    const connection = await this.pool.getConnection();
+    try { await connection.beginTransaction(); const result = await work(connection); await connection.commit(); return result; }
+    catch (error) { await connection.rollback(); throw error; } finally { connection.release(); }
+  }
+}
+
+function parseJson(value: unknown): unknown {
+  if (typeof value !== 'string') return value;
+  try { return JSON.parse(value); } catch { return {}; }
+}
+function sanitizeMetadata(value: unknown): unknown {
+  if (Array.isArray(value)) return value.map(sanitizeMetadata);
+  if (!value || typeof value !== 'object') return value;
+  return Object.fromEntries(Object.entries(value as Record<string, unknown>).map(([key, item]) =>
+    [key, /(secret|token|password|private|credential|certificate|api.?key|phone|openid|receiver|voucher)/i.test(key)
+      ? '[REDACTED]' : sanitizeMetadata(item)]));
+}
+function maskIp(ip: string) {
+  if (!ip) return '';
+  if (ip.includes(':')) return `${ip.split(':').slice(0, 2).join(':')}::****`;
+  const parts = ip.split('.'); return parts.length === 4 ? `${parts[0]}.${parts[1]}.***.***` : '***';
+}
diff --git a/backend/src/routes/system-operations.ts b/backend/src/routes/system-operations.ts
new file mode 100644
index 0000000..0cde1f4
--- /dev/null
+++ b/backend/src/routes/system-operations.ts
@@ -0,0 +1,183 @@
+import type { FastifyInstance, FastifyReply, FastifyRequest } from 'fastify';
+import { z } from 'zod';
+import type { AuthRepository } from '../auth/auth-repository.js';
+import { authenticateAccessToken } from '../auth/authenticate.js';
+import type { AccessProfile } from '../auth/rbac-repository.js';
+import type { ManagementActor } from '../auth/user-management-repository.js';
+import {
+  SystemOperationsError,
+  type SystemOperationsRepository
+} from '../operations/system-operations-repository.js';
+
+const id = z.string().regex(/^[1-9]\d{0,19}$/);
+const auditQuerySchema = z.object({
+  tenantId: id.optional(),
+  page: z.coerce.number().int().min(1).default(1),
+  pageSize: z.coerce.number().int().min(1).max(100).default(20),
+  action: z.string().trim().min(1).max(128).optional(),
+  resourceType: z.string().trim().min(1).max(64).optional(),
+  actorId: id.optional(),
+  search: z.string().trim().min(1).max(128).optional(),
+  from: z.coerce.date().optional(),
+  to: z.coerce.date().optional()
+}).strict();
+const tenantQuerySchema = z.object({ tenantId: id.optional() }).strict();
+const updateTenantSchema = z.object({
+  tenantId: id.optional(),
+  name: z.string().trim().min(1).max(128),
+  timezone: z.string().trim().min(1).max(64),
+  status: z.enum(['ACTIVE', 'DISABLED']).optional()
+}).strict();
+
+export interface SystemOperationsRouteOptions {
+  repository: Pick<SystemOperationsRepository, 'listAuditLogs' | 'getSystemOverview' | 'updateTenant'>;
+  authRepository: Pick<AuthRepository, 'validateSession'>;
+  accessControl: { getAccessProfile(tenantId: string, userId: string): Promise<AccessProfile> };
+  jwtSecret: string;
+}
+
+export async function registerSystemOperationsRoutes(
+  app: FastifyInstance,
+  options: SystemOperationsRouteOptions
+) {
+  app.get('/admin-api/audit-logs', async (request, reply) => {
+    const actor = await requireManager(request, reply, options);
+    const query = auditQuerySchema.safeParse(request.query);
+    if (!actor || !query.success) return actor ? invalid(reply, request.traceId) : undefined;
+    const tenantId = resolveTenant(actor, query.data.tenantId);
+    if (!tenantId) return tenantForbidden(reply, request.traceId);
+    const to = query.data.to ?? new Date();
+    const from = query.data.from ?? new Date(to.getTime() - 30 * 86400000);
+    if (to.getTime() <= from.getTime() || to.getTime() - from.getTime() > 366 * 86400000) {
+      return invalid(reply, request.traceId);
+    }
+    return handle(reply, request.traceId, async () => ({
+      code: 0,
+      data: await options.repository.listAuditLogs({ ...query.data, tenantId, from, to }),
+      traceId: request.traceId
+    }));
+  });
+
+  app.get('/admin-api/system/overview', async (request, reply) => {
+    const actor = await requireManager(request, reply, options);
+    const query = tenantQuerySchema.safeParse(request.query);
+    if (!actor || !query.success) return actor ? invalid(reply, request.traceId) : undefined;
+    const tenantId = resolveTenant(actor, query.data.tenantId);
+    if (!tenantId) return tenantForbidden(reply, request.traceId);
+    return handle(reply, request.traceId, async () => ({
+      code: 0,
+      data: await options.repository.getSystemOverview(tenantId),
+      traceId: request.traceId
+    }));
+  });
+
+  app.put('/admin-api/system/tenant', async (request, reply) => {
+    const actor = await requireManager(request, reply, options);
+    const body = updateTenantSchema.safeParse(request.body);
+    if (!actor || !body.success || !isValidTimeZone(body.data.timezone)) {
+      return actor ? invalid(reply, request.traceId) : undefined;
+    }
+    const tenantId = resolveTenant(actor, body.data.tenantId);
+    if (!tenantId) return tenantForbidden(reply, request.traceId);
+    if (body.data.status && !isPlatform(actor.access)) {
+      return reply.status(403).send({
+        code: 'SYSTEM_STATUS_FORBIDDEN',
+        message: 'Platform management permission is required to change tenant status.',
+        traceId: request.traceId
+      });
+    }
+    return handle(reply, request.traceId, async () => ({
+      code: 0,
+      data: await options.repository.updateTenant(actor, tenantId, body.data),
+      traceId: request.traceId
+    }));
+  });
+}
+
+async function requireManager(
+  request: FastifyRequest,
+  reply: FastifyReply,
+  options: SystemOperationsRouteOptions
+): Promise<ManagementActor | null> {
+  const auth = await authenticateAccessToken(
+    request.headers.authorization,
+    options.authRepository,
+    options.jwtSecret
+  );
+  if (!auth) {
+    reply.status(401).send({
+      code: 'AUTH_SESSION_INVALID',
+      message: 'Authentication required.',
+      traceId: request.traceId
+    });
+    return null;
+  }
+  const access = await options.accessControl.getAccessProfile(
+    auth.session.tenantId,
+    auth.session.user.id
+  );
+  if (!access.capabilities.includes('tenant.manage') && !isPlatform(access)) {
+    reply.status(403).send({
+      code: 'SYSTEM_OPERATIONS_FORBIDDEN',
+      message: 'Tenant management permission is required.',
+      traceId: request.traceId
+    });
+    return null;
+  }
+  return {
+    tenantId: auth.session.tenantId,
+    userId: auth.session.user.id,
+    access,
+    traceId: request.traceId,
+    ip: request.ip,
+    userAgent: request.headers['user-agent'] ?? ''
+  };
+}
+
+function resolveTenant(actor: ManagementActor, requested?: string) {
+  if (!requested || requested === actor.tenantId) return actor.tenantId;
+  return isPlatform(actor.access) ? requested : null;
+}
+
+function isPlatform(access: AccessProfile) {
+  return access.roles.includes('PLATFORM_ADMIN') || access.capabilities.includes('platform.manage');
+}
+
+function isValidTimeZone(value: string) {
+  try {
+    new Intl.DateTimeFormat('en-US', { timeZone: value }).format();
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function handle(reply: FastifyReply, traceId: string, work: () => Promise<unknown>) {
+  try {
+    return await work();
+  } catch (error) {
+    if (!(error instanceof SystemOperationsError)) throw error;
+    const statusCode = error.code.endsWith('_NOT_FOUND') ? 404 : 400;
+    return reply.status(statusCode).send({
+      code: error.code,
+      message: 'The system operations request is invalid.',
+      traceId
+    });
+  }
+}
+
+function invalid(reply: FastifyReply, traceId: string) {
+  return reply.status(400).send({
+    code: 'INVALID_SYSTEM_OPERATIONS_REQUEST',
+    message: 'The system operations request is invalid.',
+    traceId
+  });
+}
+
+function tenantForbidden(reply: FastifyReply, traceId: string) {
+  return reply.status(403).send({
+    code: 'SYSTEM_TENANT_FORBIDDEN',
+    message: 'The tenant is outside the allowed scope.',
+    traceId
+  });
+}
diff --git a/backend/src/server.ts b/backend/src/server.ts
index 1742b43..1100011 100644
--- a/backend/src/server.ts
+++ b/backend/src/server.ts
@@ -42,6 +42,7 @@ import { CleaningTaskRepository } from './cleaning/cleaning-task-repository.js';
 import { CleaningPayoutService } from './cleaning/cleaning-payout-service.js';
 import { BusinessStatisticsRepository } from './operations/business-statistics-repository.js';
 import { FranchiseRepository } from './franchise/franchise-repository.js';
+import { SystemOperationsRepository } from './operations/system-operations-repository.js';
 
 const config = loadConfig();
 const pool = createMySqlPool(config);
@@ -225,6 +226,12 @@ const app = await buildApp({
     authRepository,
     accessControl,
     jwtSecret: config.auth.jwtSecret
+  },
+  systemOperations: {
+    repository: new SystemOperationsRepository(pool),
+    authRepository,
+    accessControl,
+    jwtSecret: config.auth.jwtSecret
   }
 });
 app.addHook('onClose', async () => {
diff --git a/backend/tests/mysql-migration-roundtrip.test.mjs b/backend/tests/mysql-migration-roundtrip.test.mjs
index 2e3f6a0..b2b82ec 100644
--- a/backend/tests/mysql-migration-roundtrip.test.mjs
+++ b/backend/tests/mysql-migration-roundtrip.test.mjs
@@ -42,6 +42,7 @@ import { DeviceCommandService } from '../dist/devices/device-command-service.js'
 import { DeviceControlService } from '../dist/devices/device-control-service.js';
 import { MemberProfileService } from '../dist/wallets/member-profile-service.js';
 import { BusinessStatisticsRepository } from '../dist/operations/business-statistics-repository.js';
+import { SystemOperationsRepository } from '../dist/operations/system-operations-repository.js';
 import {
   executeMigrationPlan,
   loadMigrationPlan,
@@ -1795,6 +1796,49 @@ async function assertFranchiseManagement(pool, context) {
   assert.equal(auditRows.some((row) => row.metadata.includes('13800138000')), false);
 }
 
+async function assertSystemOperations(pool, context) {
+  const [adminRows] = await pool.query(
+    `SELECT u.id FROM qipai_users u
+     INNER JOIN qipai_user_roles ur ON ur.tenant_id = u.tenant_id AND ur.user_id = u.id
+     INNER JOIN qipai_roles r ON r.id = ur.role_id AND r.tenant_id = ur.tenant_id
+     WHERE u.tenant_id = ? AND r.code = 'TENANT_ADMIN' LIMIT 1`, [context.tenantId]
+  );
+  const adminId = String(adminRows[0].id);
+  const access = await new RbacRepository(pool).getAccessProfile(context.tenantId, adminId);
+  const actor = { tenantId: context.tenantId, userId: adminId, access,
+    traceId: 'm08d-system-live', ip: '172.18.20.42', userAgent: 'M08-D system live test' };
+  await pool.execute(
+    `INSERT INTO qipai_audit_logs
+      (tenant_id, actor_type, actor_id, action, resource_type, resource_id,
+       trace_id, ip, user_agent, metadata) VALUES (?, 'USER', ?, 'M08D_REDACTION_PROBE',
+       'TENANT', ?, ?, ?, ?, ?)`,
+    [context.tenantId, adminId, context.tenantId, actor.traceId, actor.ip, actor.userAgent,
+      JSON.stringify({ orderId: 'safe-order', phone: '13800138000', nested: { apiKey: 'secret', safe: 'visible' } })]
+  );
+  const repository = new SystemOperationsRepository(pool);
+  const logs = await repository.listAuditLogs({
+    tenantId: context.tenantId, page: 1, pageSize: 20, action: 'M08D_REDACTION_PROBE'
+  });
+  assert.equal(logs.total, 1);
+  assert.equal(logs.items[0].tenantId, context.tenantId);
+  assert.equal(logs.items[0].ip, '172.18.***.***');
+  assert.equal(logs.items[0].metadata.phone, '[REDACTED]');
+  assert.equal(logs.items[0].metadata.nested.apiKey, '[REDACTED]');
+  assert.equal(logs.items[0].metadata.nested.safe, 'visible');
+  const overview = await repository.getSystemOverview(context.tenantId);
+  assert.equal(overview.tenant.id, context.tenantId);
+  assert.equal(overview.latestMigration.version, '2026081003');
+  assert.ok(overview.counts.userCount > 0);
+  await repository.updateTenant(actor, context.tenantId, {
+    name: overview.tenant.name, timezone: overview.tenant.timezone
+  });
+  const updatedLogs = await repository.listAuditLogs({
+    tenantId: context.tenantId, page: 1, pageSize: 20, action: 'TENANT_SYSTEM_CONFIG_UPDATED'
+  });
+  assert.equal(updatedLogs.total, 1);
+  assert.equal(updatedLogs.items[0].actorId, adminId);
+}
+
 async function assertDeviceTopology(pool, context) {
   const [adminRows] = await pool.query(
     `SELECT u.id FROM qipai_users u
@@ -2083,6 +2127,7 @@ try {
   await assertStoreRoomDomain(pool, loginContext);
   await assertContentManagement(pool, loginContext);
   await assertFranchiseManagement(pool, loginContext);
+  await assertSystemOperations(pool, loginContext);
   await assertStoreDiscovery(pool, loginContext);
   await assertSceneAndWifiAccess(pool, loginContext);
   await assertPricingAndReservations(pool, loginContext);
@@ -2173,6 +2218,10 @@ try {
       'versioned decoration publish and archive',
       'store advertisement delivery scope',
       'platform advertisement rejection',
+      'franchise application idempotency and phone-free audit metadata',
+      'franchise assignment and controlled follow-up status transition',
+      'tenant-scoped audit filtering with recursive sensitive metadata redaction',
+      'system overview and audited tenant configuration update',
       'city fallback store filtering',
       'server-side distance sorting',
       'empty manual city result',
diff --git a/backend/tests/system-operations.test.mjs b/backend/tests/system-operations.test.mjs
new file mode 100644
index 0000000..c665dcc
--- /dev/null
+++ b/backend/tests/system-operations.test.mjs
@@ -0,0 +1,117 @@
+import assert from 'node:assert/strict';
+import { buildApp } from '../dist/app.js';
+import { signAccessToken } from '../dist/auth/jwt.js';
+import { SystemOperationsRepository } from '../dist/operations/system-operations-repository.js';
+
+const secret = 'test-only-system-operations-secret-32';
+const token = signAccessToken({
+  sub: '21', sid: '5c4d3af8-c63c-4edb-bf95-b84127bb3f6e', tid: '7', aid: '9', rv: 1
+}, secret, 900);
+let auditQuery;
+let overviewTenantId;
+let updateCall;
+const repository = {
+  async listAuditLogs(input) {
+    auditQuery = input;
+    return { items: [], total: 0, page: input.page, pageSize: input.pageSize };
+  },
+  async getSystemOverview(tenantId) {
+    overviewTenantId = tenantId;
+    return {
+      tenant: { id: tenantId, code: 'demo', name: '演示租户', status: 'ACTIVE', timezone: 'Asia/Shanghai' },
+      counts: { storeCount: 1, userCount: 2, activeSessionCount: 1, appBindingCount: 1, auditTodayCount: 3 },
+      latestMigration: { version: '2026081003', name: 'm08d_franchise_leads' }
+    };
+  },
+  async updateTenant(actor, tenantId, input) {
+    updateCall = { actor, tenantId, input };
+    return { tenantId, updated: true };
+  }
+};
+const authRepository = {
+  async validateSession() {
+    return {
+      id: '5c4d3af8-c63c-4edb-bf95-b84127bb3f6e', tenantId: '7', platformAppId: '9',
+      expiresAt: new Date(Date.now() + 60000),
+      user: { id: '21', tenantId: '7', userType: 'STAFF', status: 'ACTIVE', roleVersion: 1,
+        nickname: '管理员', avatarUrl: '', phone: '' }
+    };
+  }
+};
+const tenantAccess = { roles: ['TENANT_ADMIN'], capabilities: ['tenant.manage'], storeIds: [] };
+const app = await buildApp({ systemOperations: {
+  repository, authRepository,
+  accessControl: { async getAccessProfile() { return tenantAccess; } },
+  jwtSecret: secret
+} });
+const auth = { authorization: `Bearer ${token}` };
+
+const listed = await app.inject({ method: 'GET',
+  url: '/admin-api/audit-logs?action=ORDER_CREATED&resourceType=ORDER&page=2&pageSize=10', headers: auth });
+assert.equal(listed.statusCode, 200);
+assert.deepEqual({ tenantId: auditQuery.tenantId, action: auditQuery.action,
+  resourceType: auditQuery.resourceType, page: auditQuery.page },
+{ tenantId: '7', action: 'ORDER_CREATED', resourceType: 'ORDER', page: 2 });
+assert.ok(auditQuery.from instanceof Date);
+assert.ok(auditQuery.to instanceof Date);
+
+const crossTenant = await app.inject({ method: 'GET', url: '/admin-api/audit-logs?tenantId=8', headers: auth });
+assert.equal(crossTenant.statusCode, 403);
+const invalidRange = await app.inject({ method: 'GET',
+  url: '/admin-api/audit-logs?from=2025-01-01&to=2026-08-01', headers: auth });
+assert.equal(invalidRange.statusCode, 400);
+
+const overview = await app.inject({ method: 'GET', url: '/admin-api/system/overview', headers: auth });
+assert.equal(overview.statusCode, 200);
+assert.equal(overviewTenantId, '7');
+assert.equal(overview.json().data.counts.auditTodayCount, 3);
+
+const updated = await app.inject({ method: 'PUT', url: '/admin-api/system/tenant', headers: auth,
+  payload: { name: '新租户名称', timezone: 'Asia/Shanghai' } });
+assert.equal(updated.statusCode, 200);
+assert.deepEqual({ tenantId: updateCall.tenantId, name: updateCall.input.name,
+  timezone: updateCall.input.timezone },
+{ tenantId: '7', name: '新租户名称', timezone: 'Asia/Shanghai' });
+const invalidTimezone = await app.inject({ method: 'PUT', url: '/admin-api/system/tenant', headers: auth,
+  payload: { name: '新租户名称', timezone: 'Mars/Olympus' } });
+assert.equal(invalidTimezone.statusCode, 400);
+const tenantStatusChange = await app.inject({ method: 'PUT', url: '/admin-api/system/tenant', headers: auth,
+  payload: { name: '新租户名称', timezone: 'Asia/Shanghai', status: 'DISABLED' } });
+assert.equal(tenantStatusChange.statusCode, 403);
+assert.equal(tenantStatusChange.json().code, 'SYSTEM_STATUS_FORBIDDEN');
+await app.close();
+
+const platformApp = await buildApp({ systemOperations: {
+  repository, authRepository,
+  accessControl: { async getAccessProfile() {
+    return { roles: ['PLATFORM_ADMIN'], capabilities: ['platform.manage'], storeIds: [] };
+  } }, jwtSecret: secret
+} });
+const platformUpdate = await platformApp.inject({ method: 'PUT', url: '/admin-api/system/tenant', headers: auth,
+  payload: { tenantId: '8', name: '平台目标租户', timezone: 'UTC', status: 'DISABLED' } });
+assert.equal(platformUpdate.statusCode, 200);
+assert.equal(updateCall.tenantId, '8');
+assert.equal(updateCall.input.status, 'DISABLED');
+await platformApp.close();
+
+const sensitivePool = {
+  async execute(sql) {
+    if (sql.includes('COUNT(*)')) return [[{ total: 1 }], []];
+    return [[{
+      id: '99', tenantId: '7', actorType: 'USER', actorId: '21', actorName: '管理员',
+      action: 'CONFIG_UPDATED', resourceType: 'TENANT', resourceId: '7', traceId: 'trace-99',
+      ip: '192.168.10.22', userAgent: 'test',
+      metadata: JSON.stringify({ orderId: '88', phone: '13800138000',
+        nested: { apiKey: 'secret-key', safe: 'visible' } }), createdAt: new Date()
+    }], []];
+  }
+};
+const sanitized = await new SystemOperationsRepository(sensitivePool).listAuditLogs({
+  tenantId: '7', page: 1, pageSize: 20
+});
+assert.equal(sanitized.items[0].ip, '192.168.***.***');
+assert.equal(sanitized.items[0].metadata.phone, '[REDACTED]');
+assert.equal(sanitized.items[0].metadata.nested.apiKey, '[REDACTED]');
+assert.equal(sanitized.items[0].metadata.nested.safe, 'visible');
+
+console.log('PASS: M08-D tenant-scoped audit logs, metadata redaction and system settings routes are present.');
diff --git a/scripts/check-admin-m08-d.mjs b/scripts/check-admin-m08-d.mjs
index fe501d8..b129b89 100644
--- a/scripts/check-admin-m08-d.mjs
+++ b/scripts/check-admin-m08-d.mjs
@@ -19,6 +19,7 @@ for (const pattern of [
   "activeModule = 'platformApps'",
   "activeModule = 'content'",
   "activeModule = 'franchise'",
+  "activeModule = 'system'",
   '平台运营总览',
   'StoresRoomsPanel',
   'OrdersPanel',
@@ -29,6 +30,7 @@ for (const pattern of [
   'PlatformAppsPanel',
   'ContentManagementPanel',
   'FranchisePanel',
+  'LogsSystemPanel',
   '运营总览',
   'savedToken',
   'loadCleaningWorkspace'
@@ -219,6 +221,19 @@ const franchiseRoutes = read('backend/src/routes/franchise.ts');
 assert.match(franchiseRoutes, /'\/app-api\/franchise-applications'/);
 assert.match(franchiseRoutes, /'\/admin-api\/franchise-applications\/:id\/follow-ups'/);
 
+const systemPanel = read('admin/src/components/LogsSystemPanel.vue');
+for (const pattern of ['listAuditLogs', 'getSystemOverview', 'updateTenantSystemConfig',
+  '安全审计日志', '导出当前页', 'Schema 迁移', '脱敏元数据']) {
+  assert.match(systemPanel, new RegExp(pattern));
+}
+const systemRoutes = read('backend/src/routes/system-operations.ts');
+assert.match(systemRoutes, /'\/admin-api\/audit-logs'/);
+assert.match(systemRoutes, /'\/admin-api\/system\/overview'/);
+assert.match(systemRoutes, /'\/admin-api\/system\/tenant'/);
+const systemRepository = read('backend/src/operations/system-operations-repository.ts');
+assert.match(systemRepository, /sanitizeMetadata/);
+assert.match(systemRepository, /TENANT_SYSTEM_CONFIG_UPDATED/);
+
 const routes = read('backend/src/routes/business-statistics.ts');
 assert.match(routes, /'\/app-api\/management\/statistics', '\/admin-api\/statistics'/);
 
@@ -261,6 +276,8 @@ for (const pattern of [
   '.asset-gallery',
   '.component-editor',
   '.franchise-metrics',
+  '.system-metrics',
+  '.audit-filters',
   '@media (max-width: 980px)',
   '@media (max-width: 560px)'
 ]) {