diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index af6b2d2..065bb8a 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -38,6 +38,12 @@ function AppRoutes() {
       >
         <Route index element={<Dashboard />} />
         <Route path="merchant-center" element={<MerchantCenter />} />
+        <Route path="merchant-products" element={<MerchantCenter fixedTab="products" title="商品" />} />
+        <Route path="merchant-orders" element={<MerchantCenter fixedTab="orders" title="履约订单" />} />
+        <Route path="merchant-wallet" element={<MerchantCenter fixedTab="wallet" title="钱包" />} />
+        <Route path="merchant-members" element={<MerchantCenter fixedTab="members" title="成员" />} />
+        <Route path="merchant-callbacks" element={<MerchantCenter fixedTab="callbacks" title="回调" />} />
+        <Route path="merchant-api-keys" element={<MerchantCenter fixedTab="api" title="API 密钥" />} />
         <Route
           path="platform-merchants"
           element={
diff --git a/frontend/src/layouts/MainLayout.tsx b/frontend/src/layouts/MainLayout.tsx
index d345956..f2470e1 100644
--- a/frontend/src/layouts/MainLayout.tsx
+++ b/frontend/src/layouts/MainLayout.tsx
@@ -54,53 +54,39 @@ const adminSections: SidebarSection[] = [
     key: 'products',
     label: '商品管理',
     icon: <AppstoreOutlined />,
-    children: [{ key: 'platform-products', label: '平台授权商品', disabled: true }],
+    children: [{ key: 'merchant-products', label: '商品', path: '/merchant-products' }],
   },
   {
     key: 'shops',
-    label: '店铺管理',
+    label: '商户管理',
     icon: <ShopOutlined />,
-    children: [
-      { key: 'shop-list', label: '店铺列表', path: '/platform-merchants' },
-      { key: 'shop-products', label: '店铺商品绑定', disabled: true },
-    ],
+    children: [{ key: 'shop-list', label: '商户列表', path: '/platform-merchants' }],
   },
   {
     key: 'orders',
     label: '订单管理',
     icon: <OrderedListOutlined />,
-    children: [
-      { key: 'auto-orders', label: '自动发货订单', disabled: true },
-      { key: 'manual-verify', label: '手动核销/反核销', disabled: true },
-      { key: 'after-sales', label: '售后订单', disabled: true },
-      { key: 'manual-orders', label: '手动处理订单', disabled: true },
-    ],
+    children: [{ key: 'fulfillment-orders', label: '履约订单', path: '/merchant-orders' }],
   },
   {
     key: 'staff',
     label: '员工管理',
     icon: <TeamOutlined />,
-    children: [
-      { key: 'staff-list', label: '员工列表', disabled: true },
-      { key: 'positions', label: '岗位列表', disabled: true },
-      { key: 'operation-logs', label: '操作日志', disabled: true },
-    ],
+    children: [{ key: 'merchant-members', label: '成员', path: '/merchant-members' }],
   },
   {
     key: 'funds',
     label: '资金',
     icon: <WalletOutlined />,
-    children: [
-      { key: 'point-details', label: '积分明细', disabled: true },
-      { key: 'recharge-requests', label: '充值申请', disabled: true },
-    ],
+    children: [{ key: 'merchant-wallet', label: '钱包', path: '/merchant-wallet' }],
   },
   {
     key: 'open-api',
     label: '开放 API',
     icon: <ApiOutlined />,
     children: [
-      { key: 'api-keys', label: 'API 密钥', path: '/merchant-center' },
+      { key: 'api-keys', label: 'API 密钥', path: '/merchant-api-keys' },
+      { key: 'api-callbacks', label: '回调', path: '/merchant-callbacks' },
       { key: 'api-docs', label: '对接文档', path: '/open-api' },
       { key: 'api-debug', label: '调用调试', path: '/api-debug' },
     ],
@@ -114,17 +100,60 @@ const merchantSections: SidebarSection[] = [
     icon: <DashboardOutlined />,
     path: '/',
   },
+  {
+    key: 'products',
+    label: '商品管理',
+    icon: <AppstoreOutlined />,
+    children: [{ key: 'merchant-products', label: '商品', path: '/merchant-products' }],
+  },
+  {
+    key: 'orders',
+    label: '订单管理',
+    icon: <OrderedListOutlined />,
+    children: [{ key: 'fulfillment-orders', label: '履约订单', path: '/merchant-orders' }],
+  },
+  {
+    key: 'funds',
+    label: '资金',
+    icon: <WalletOutlined />,
+    children: [{ key: 'merchant-wallet', label: '钱包', path: '/merchant-wallet' }],
+  },
+  {
+    key: 'staff',
+    label: '员工管理',
+    icon: <TeamOutlined />,
+    children: [{ key: 'merchant-members', label: '成员', path: '/merchant-members' }],
+  },
   {
     key: 'open-api',
     label: '开放 API',
     icon: <ApiOutlined />,
-    children: [{ key: 'api-keys', label: 'API 密钥', path: '/merchant-center' }],
+    children: [
+      { key: 'api-keys', label: 'API 密钥', path: '/merchant-api-keys' },
+      { key: 'api-callbacks', label: '回调', path: '/merchant-callbacks' },
+    ],
   },
 ]
 
-function getSelectedKey(pathname: string) {
+function getSelectedKey(pathname: string, search: string) {
   if (pathname === '/') return 'dashboard'
-  if (pathname.startsWith('/merchant-center')) return 'api-keys'
+  if (pathname.startsWith('/merchant-products')) return 'merchant-products'
+  if (pathname.startsWith('/merchant-orders')) return 'fulfillment-orders'
+  if (pathname.startsWith('/merchant-wallet')) return 'merchant-wallet'
+  if (pathname.startsWith('/merchant-members')) return 'merchant-members'
+  if (pathname.startsWith('/merchant-callbacks')) return 'api-callbacks'
+  if (pathname.startsWith('/merchant-api-keys')) return 'api-keys'
+  if (pathname.startsWith('/merchant-center')) {
+    const tab = new URLSearchParams(search).get('tab')
+    const tabKeys: Record<string, string> = {
+      products: 'merchant-products',
+      orders: 'fulfillment-orders',
+      wallet: 'merchant-wallet',
+      members: 'merchant-members',
+      callbacks: 'api-callbacks',
+    }
+    return tab ? tabKeys[tab] || 'merchant-products' : 'merchant-products'
+  }
   if (pathname.startsWith('/open-api')) return 'api-docs'
   if (pathname.startsWith('/api-debug')) return 'api-debug'
   if (pathname.startsWith('/platform-merchants')) return 'shop-list'
@@ -145,7 +174,7 @@ export default function MainLayout() {
   const isDocsPage = location.pathname.startsWith('/open-api')
 
   const sections = useMemo(() => (isAdmin ? adminSections : merchantSections), [isAdmin])
-  const selectedKey = getSelectedKey(location.pathname)
+  const selectedKey = getSelectedKey(location.pathname, location.search)
   const [openKeys, setOpenKeys] = useState<string[]>(() => getInitialOpenKeys(sections, selectedKey))
 
   useEffect(() => {
diff --git a/frontend/src/pages/ApiDebugger.tsx b/frontend/src/pages/ApiDebugger.tsx
index b324b09..0702a84 100644
--- a/frontend/src/pages/ApiDebugger.tsx
+++ b/frontend/src/pages/ApiDebugger.tsx
@@ -238,7 +238,7 @@ export default function ApiDebugger() {
         API 调试工具
       </Title>
       <Paragraph type="secondary">
-        填写商户 API 客户端的 AppKey 与 Secret，选择接口并发送请求。签名在浏览器端使用 Web Crypto API 计算。
+        填写商户 API 密钥的 AppKey 与 Secret，选择接口并发送请求。签名在浏览器端使用 Web Crypto API 计算。
        </Paragraph>
 
       <Card
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
index d83e2da..3c79c77 100644
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@@ -199,7 +199,7 @@ export default function Dashboard() {
             <Row gutter={[16, 16]}>
               <Col span={12}>
                 <Statistic
-                  title="API 客户端"
+                  title="API 密钥"
                   value={stats?.active_api_client_count ?? 0}
                   prefix={<ApiOutlined />}
                   suffix={`/ ${numberText(stats?.api_client_count)}`}
diff --git a/frontend/src/pages/MerchantCenter.tsx b/frontend/src/pages/MerchantCenter.tsx
index 0fe831a..49a8469 100644
--- a/frontend/src/pages/MerchantCenter.tsx
+++ b/frontend/src/pages/MerchantCenter.tsx
@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useMemo, useState } from 'react'
+import { useLocation } from 'react-router-dom'
 import {
   Button,
   Descriptions,
@@ -81,10 +82,19 @@ const testOrderStatusOptions = [
   { value: 'failed', label: '发货失败，可重试' },
 ]
 
-export default function MerchantCenter() {
+type MerchantCenterTab = 'products' | 'orders' | 'wallet' | 'api' | 'callbacks' | 'members'
+
+interface MerchantCenterProps {
+  fixedTab?: MerchantCenterTab
+  title?: string
+}
+
+export default function MerchantCenter({ fixedTab, title = '商户中心' }: MerchantCenterProps = {}) {
+  const location = useLocation()
+  const routeTab = useMemo(() => fixedTab ?? tabFromSearch(location.search), [fixedTab, location.search])
   const [merchant, setMerchant] = useState<Merchant | null>(null)
   const [merchantRole, setMerchantRole] = useState<MerchantMember['role']>()
-  const [activeTab, setActiveTab] = useState('products')
+  const [activeTab, setActiveTab] = useState<MerchantCenterTab>(routeTab ?? 'products')
   const [products, setProducts] = useState<PageResult<MerchantProduct>>({ list: [], total: 0, page: 1, size: 10 })
   const [orders, setOrders] = useState<PageResult<FulfillmentOrder>>({ list: [], total: 0, page: 1, size: 10 })
   const [ledger, setLedger] = useState<PageResult<WalletLedgerEntry>>({ list: [], total: 0, page: 1, size: 10 })
@@ -252,8 +262,8 @@ export default function MerchantCenter() {
     setLoading(true)
     try {
       const current = await loadCurrent()
-      const nextTab = resolveEnabledTab(activeTab, current.merchant.features)
-      if (nextTab !== activeTab) {
+      const nextTab = fixedTab ?? resolveEnabledTab(routeTab ?? activeTab, current.merchant.features)
+      if (!fixedTab && nextTab !== activeTab) {
         setActiveTab(nextTab)
       }
       await loadActiveTab(current.role, nextTab)
@@ -262,12 +272,18 @@ export default function MerchantCenter() {
     } finally {
       setLoading(false)
     }
-  }, [activeTab, loadActiveTab, loadCurrent])
+  }, [activeTab, fixedTab, loadActiveTab, loadCurrent, routeTab])
 
   useEffect(() => {
     loadAll()
   }, [loadAll])
 
+  useEffect(() => {
+    if (routeTab && activeTab !== routeTab) {
+      setActiveTab(routeTab)
+    }
+  }, [activeTab, routeTab])
+
   const openProductCreate = () => {
     setEditingProduct(null)
     productForm.resetFields()
@@ -380,7 +396,7 @@ export default function MerchantCenter() {
       })
       setApiCredential(credential)
       setApiClientOpen(false)
-      message.success('API 客户端已创建')
+      message.success('API 密钥已创建')
       loadAPIClients()
     } catch (e) {
       message.error(e instanceof Error ? e.message : '创建失败')
@@ -459,27 +475,39 @@ export default function MerchantCenter() {
   ]
 
   const orderColumns: ColumnsType<FulfillmentOrder> = [
-    { title: '平台订单号', dataIndex: 'order_no', width: 210, render: (v) => <Typography.Text copyable>{v}</Typography.Text> },
-    { title: '商户单号', dataIndex: 'client_order_no', width: 160, ellipsis: true },
-    { title: 'SKU', dataIndex: 'product_sku', width: 150, render: (v) => <Typography.Text code>{v}</Typography.Text> },
-    { title: '商品', dataIndex: 'product_name', ellipsis: true },
-    { title: '基础金额', dataIndex: 'base_amount', width: 100, render: money },
-    { title: '手续费', dataIndex: 'service_fee_amount', width: 100, render: money },
-    { title: '扣款合计', dataIndex: 'amount', width: 100, render: money },
-    { title: '支付', dataIndex: 'payment_status', width: 90, render: paymentStatusTag },
-    { title: '履约', dataIndex: 'fulfillment_status', width: 100, render: fulfillmentStatusTag },
-    { title: '上游单号', dataIndex: 'provider_order_no', width: 140, ellipsis: true, render: (v) => v || '-' },
+    {
+      title: '平台订单号',
+      dataIndex: 'order_no',
+      width: 190,
+      ellipsis: true,
+      render: (v) => <Typography.Text copyable ellipsis style={{ maxWidth: '100%' }}>{v}</Typography.Text>,
+    },
+    { title: '商户单号', dataIndex: 'client_order_no', width: 140, ellipsis: true },
+    {
+      title: 'SKU',
+      dataIndex: 'product_sku',
+      width: 130,
+      ellipsis: true,
+      render: (v) => <Typography.Text code ellipsis style={{ maxWidth: '100%' }}>{v}</Typography.Text>,
+    },
+    { title: '商品', dataIndex: 'product_name', width: 220, ellipsis: true },
+    { title: '基础金额', dataIndex: 'base_amount', width: 88, render: money },
+    { title: '手续费', dataIndex: 'service_fee_amount', width: 82, render: money },
+    { title: '扣款合计', dataIndex: 'amount', width: 88, render: money },
+    { title: '支付', dataIndex: 'payment_status', width: 76, render: paymentStatusTag },
+    { title: '履约', dataIndex: 'fulfillment_status', width: 86, render: fulfillmentStatusTag },
+    { title: '上游单号', dataIndex: 'provider_order_no', width: 120, ellipsis: true, render: (v) => v || '-' },
     {
       title: '链接有效期',
       dataIndex: 'delivery_link_expires_at',
-      width: 160,
+      width: 140,
       render: (_, record) => record.delivery_link_revoked_at ? <Tag color="red">已作废</Tag> : formatDateTime(record.delivery_link_expires_at),
     },
-    { title: '时间', dataIndex: 'created_at', width: 180, render: formatDateTime },
+    { title: '时间', dataIndex: 'created_at', width: 150, render: formatDateTime },
     {
       title: '发货链接',
       key: 'delivery_link',
-      width: 220,
+      width: 150,
       render: (_, record) => record.delivery_link_revoked_at ? (
         <Button type="link" size="small" onClick={() => restoreDeliveryLink(record.order_no)}>取消作废</Button>
       ) : (
@@ -547,12 +575,141 @@ export default function MerchantCenter() {
     { title: '状态', dataIndex: 'status', width: 90, render: (v) => (v === 1 ? <Tag color="green">启用</Tag> : <Tag>禁用</Tag>) },
   ]
 
+  const productContent = (
+    <Space direction="vertical" style={{ width: '100%' }} size="middle">
+      <Space style={{ width: '100%', justifyContent: 'space-between' }}>
+        <Typography.Text type="secondary">通用商品以商户 SKU 对外销售。</Typography.Text>
+        {canManage && <Button type="primary" icon={<PlusOutlined />} onClick={openProductCreate}>新增商品</Button>}
+      </Space>
+      <Table
+        rowKey="id"
+        loading={loading}
+        columns={productColumns}
+        dataSource={products.list}
+        tableLayout="fixed"
+        pagination={pageConfig(products, loadProducts)}
+      />
+    </Space>
+  )
+
+  const orderContent = (
+    <Space direction="vertical" style={{ width: '100%' }} size="middle">
+      <Space style={{ width: '100%', justifyContent: 'space-between' }}>
+        <Typography.Text type="secondary">发货链接由后端生成并带签名，用户只填写游戏 UID。</Typography.Text>
+        {canManage && (
+          <Space>
+            <Button type="primary" icon={<PlusOutlined />} onClick={openTestOrderCreate}>
+              创建测试订单
+            </Button>
+          </Space>
+        )}
+      </Space>
+      <Table
+        rowKey="id"
+        loading={loading}
+        columns={orderColumns}
+        dataSource={orders.list}
+        tableLayout="fixed"
+        scroll={{ x: 1660 }}
+        pagination={pageConfig(orders, loadOrders)}
+      />
+    </Space>
+  )
+
+  const walletContent = (
+    <Space direction="vertical" style={{ width: '100%' }} size="middle">
+      <Space style={{ width: '100%', justifyContent: 'space-between' }}>
+        <Descriptions size="small" bordered column={3} style={{ flex: 1 }}>
+          <Descriptions.Item label="可用余额">{money(wallet?.available_balance ?? 0)}</Descriptions.Item>
+          <Descriptions.Item label="冻结余额">{money(wallet?.frozen_balance ?? 0)}</Descriptions.Item>
+          <Descriptions.Item label="币种">{wallet?.currency || 'POINT'}</Descriptions.Item>
+        </Descriptions>
+        {canFinance && (
+          <Button
+            icon={<WalletOutlined />}
+            onClick={() => {
+              walletForm.resetFields()
+              walletForm.setFieldsValue({ idempotency_key: `manual-${Date.now()}` })
+              setWalletOpen(true)
+            }}
+          >
+            调整
+          </Button>
+        )}
+      </Space>
+      {canFinance ? (
+        <Table
+          rowKey="id"
+          loading={loading}
+          columns={ledgerColumns}
+          dataSource={ledger.list}
+          tableLayout="fixed"
+          pagination={pageConfig(ledger, loadWallet)}
+        />
+      ) : (
+        <Typography.Text type="secondary">当前角色可查看余额，钱包流水仅财务或负责人可见。</Typography.Text>
+      )}
+    </Space>
+  )
+
+  const apiKeyContent = (
+    <Space direction="vertical" style={{ width: '100%' }} size="middle">
+      <Space style={{ width: '100%', justifyContent: 'space-between' }}>
+        <Typography.Text type="secondary">用于开放 API 调用鉴权。新 Secret 只在创建后显示一次，请及时保存。</Typography.Text>
+        {canManage && <Button type="primary" icon={<ApiOutlined />} onClick={() => {
+          apiClientForm.resetFields()
+          apiClientForm.setFieldsValue({ signature_version: 'v1', scopes: ['products:read', 'orders:read', 'orders:write'] })
+          setApiClientOpen(true)
+        }}>新增密钥</Button>}
+      </Space>
+      <Table rowKey="id" loading={loading} columns={apiClientColumns} dataSource={apiClients} tableLayout="fixed" />
+    </Space>
+  )
+
+  const callbackContent = (
+    <Space direction="vertical" style={{ width: '100%' }} size="middle">
+      <Space style={{ width: '100%', justifyContent: 'space-between' }}>
+        <Typography.Text type="secondary">回调事件通过 outbox 持久化发送。</Typography.Text>
+        {canManage && <Button type="primary" icon={<PlusOutlined />} onClick={() => {
+          callbackForm.resetFields()
+          callbackForm.setFieldsValue({ events: ['order.fulfillment.updated'] })
+          setCallbackOpen(true)
+        }}>新增回调</Button>}
+      </Space>
+      <Table rowKey="id" loading={loading} columns={callbackColumns} dataSource={callbacks} tableLayout="fixed" />
+    </Space>
+  )
+
+  const memberContent = (
+    <Space direction="vertical" style={{ width: '100%' }} size="middle">
+      <Space style={{ width: '100%', justifyContent: 'space-between' }}>
+        <Typography.Text type="secondary">成员角色独立于平台账号角色。</Typography.Text>
+        {merchantRole === 'owner' && <Button type="primary" icon={<PlusOutlined />} onClick={() => {
+          memberForm.resetFields()
+          memberForm.setFieldsValue({ role: 'operator' })
+          setMemberOpen(true)
+        }}>添加成员</Button>}
+      </Space>
+      <Table rowKey="id" loading={loading} columns={memberColumns} dataSource={members} tableLayout="fixed" />
+    </Space>
+  )
+
+  const tabItems = [
+    { key: 'products', label: '商品', disabled: !hasFeature('products'), children: productContent },
+    { key: 'orders', label: '履约订单', disabled: !hasFeature('orders'), children: orderContent },
+    { key: 'wallet', label: '钱包', disabled: !hasFeature('wallet'), children: walletContent },
+    { key: 'api', label: 'API 密钥', disabled: !hasFeature('api'), children: apiKeyContent },
+    { key: 'callbacks', label: '回调', disabled: !hasFeature('callbacks'), children: callbackContent },
+    { key: 'members', label: '成员', children: memberContent },
+  ]
+  const fixedTabContent = tabItems.find((item) => item.key === fixedTab)?.children
+
   return (
     <div>
       <Space style={{ marginBottom: 16, width: '100%', justifyContent: 'space-between' }}>
         <div>
           <Typography.Title level={4} style={{ margin: 0 }}>
-            商户中心
+            {title}
           </Typography.Title>
           <Typography.Text type="secondary">
             {merchant ? `${merchant.name} / ${merchant.code}` : '加载中'} · {merchantRole ? roleText(merchantRole) : '-'}
@@ -563,154 +720,13 @@ export default function MerchantCenter() {
         </Button>
       </Space>
 
-      <Tabs
-        activeKey={activeTab}
-        onChange={setActiveTab}
-        items={[
-          {
-            key: 'products',
-            label: '商品',
-            disabled: !hasFeature('products'),
-            children: (
-              <Space direction="vertical" style={{ width: '100%' }} size="middle">
-                <Space style={{ width: '100%', justifyContent: 'space-between' }}>
-                  <Typography.Text type="secondary">通用商品以商户 SKU 对外销售。</Typography.Text>
-                  {canManage && <Button type="primary" icon={<PlusOutlined />} onClick={openProductCreate}>新增商品</Button>}
-                </Space>
-                <Table
-                  rowKey="id"
-                  loading={loading}
-                  columns={productColumns}
-                  dataSource={products.list}
-                  tableLayout="fixed"
-                  pagination={pageConfig(products, loadProducts)}
-                />
-              </Space>
-            ),
-          },
-          {
-            key: 'orders',
-            label: '履约订单',
-            disabled: !hasFeature('orders'),
-            children: (
-              <Space direction="vertical" style={{ width: '100%' }} size="middle">
-                <Space style={{ width: '100%', justifyContent: 'space-between' }}>
-                  <Typography.Text type="secondary">发货链接由后端生成并带签名，用户只填写游戏 UID。</Typography.Text>
-                  {canManage && (
-                    <Space>
-                      <Button type="primary" icon={<PlusOutlined />} onClick={openTestOrderCreate}>
-                        创建测试订单
-                      </Button>
-                    </Space>
-                  )}
-                </Space>
-                <Table
-                  rowKey="id"
-                  loading={loading}
-                  columns={orderColumns}
-                  dataSource={orders.list}
-                  tableLayout="fixed"
-                  scroll={{ x: 1500 }}
-                  pagination={pageConfig(orders, loadOrders)}
-                />
-              </Space>
-            ),
-          },
-          {
-            key: 'wallet',
-            label: '钱包',
-            disabled: !hasFeature('wallet'),
-            children: (
-              <Space direction="vertical" style={{ width: '100%' }} size="middle">
-                <Space style={{ width: '100%', justifyContent: 'space-between' }}>
-                  <Descriptions size="small" bordered column={3} style={{ flex: 1 }}>
-                    <Descriptions.Item label="可用余额">{money(wallet?.available_balance ?? 0)}</Descriptions.Item>
-                    <Descriptions.Item label="冻结余额">{money(wallet?.frozen_balance ?? 0)}</Descriptions.Item>
-                    <Descriptions.Item label="币种">{wallet?.currency || 'POINT'}</Descriptions.Item>
-                  </Descriptions>
-                  {canFinance && (
-                    <Button
-                      icon={<WalletOutlined />}
-                      onClick={() => {
-                        walletForm.resetFields()
-                        walletForm.setFieldsValue({ idempotency_key: `manual-${Date.now()}` })
-                        setWalletOpen(true)
-                      }}
-                    >
-                      调整
-                    </Button>
-                  )}
-                </Space>
-                {canFinance ? (
-                  <Table
-                    rowKey="id"
-                    loading={loading}
-                    columns={ledgerColumns}
-                    dataSource={ledger.list}
-                    tableLayout="fixed"
-                    pagination={pageConfig(ledger, loadWallet)}
-                  />
-                ) : (
-                  <Typography.Text type="secondary">当前角色可查看余额，钱包流水仅财务或负责人可见。</Typography.Text>
-                )}
-              </Space>
-            ),
-          },
-          {
-            key: 'api',
-            label: 'API 客户端',
-            disabled: !hasFeature('api'),
-            children: (
-              <Space direction="vertical" style={{ width: '100%' }} size="middle">
-                <Space style={{ width: '100%', justifyContent: 'space-between' }}>
-                  <Typography.Text type="secondary">新密钥只在创建后显示一次。</Typography.Text>
-                  {canManage && <Button type="primary" icon={<ApiOutlined />} onClick={() => {
-                    apiClientForm.resetFields()
-                    apiClientForm.setFieldsValue({ signature_version: 'v1', scopes: ['products:read', 'orders:read', 'orders:write'] })
-                    setApiClientOpen(true)
-                  }}>新增客户端</Button>}
-                </Space>
-                <Table rowKey="id" loading={loading} columns={apiClientColumns} dataSource={apiClients} tableLayout="fixed" />
-              </Space>
-            ),
-          },
-          {
-            key: 'callbacks',
-            label: '回调',
-            disabled: !hasFeature('callbacks'),
-            children: (
-              <Space direction="vertical" style={{ width: '100%' }} size="middle">
-                <Space style={{ width: '100%', justifyContent: 'space-between' }}>
-                  <Typography.Text type="secondary">回调事件通过 outbox 持久化发送。</Typography.Text>
-                  {canManage && <Button type="primary" icon={<PlusOutlined />} onClick={() => {
-                    callbackForm.resetFields()
-                    callbackForm.setFieldsValue({ events: ['order.fulfillment.updated'] })
-                    setCallbackOpen(true)
-                  }}>新增回调</Button>}
-                </Space>
-                <Table rowKey="id" loading={loading} columns={callbackColumns} dataSource={callbacks} tableLayout="fixed" />
-              </Space>
-            ),
-          },
-          {
-            key: 'members',
-            label: '成员',
-            children: (
-              <Space direction="vertical" style={{ width: '100%' }} size="middle">
-                <Space style={{ width: '100%', justifyContent: 'space-between' }}>
-                  <Typography.Text type="secondary">成员角色独立于平台账号角色。</Typography.Text>
-                  {merchantRole === 'owner' && <Button type="primary" icon={<PlusOutlined />} onClick={() => {
-                    memberForm.resetFields()
-                    memberForm.setFieldsValue({ role: 'operator' })
-                    setMemberOpen(true)
-                  }}>添加成员</Button>}
-                </Space>
-                <Table rowKey="id" loading={loading} columns={memberColumns} dataSource={members} tableLayout="fixed" />
-              </Space>
-            ),
-          },
-        ]}
-      />
+      {fixedTab ? fixedTabContent : (
+        <Tabs
+          activeKey={activeTab}
+          onChange={(key) => setActiveTab(key as MerchantCenterTab)}
+          items={tabItems}
+        />
+      )}
 
       <Modal title={editingProduct ? '编辑商品' : '新增商品'} open={productOpen} onOk={submitProduct} onCancel={() => setProductOpen(false)} destroyOnClose width={620}>
         <Form form={productForm} layout="vertical" style={{ marginTop: 16 }}>
@@ -847,7 +863,7 @@ export default function MerchantCenter() {
         </Form>
       </Modal>
 
-      <Modal title="新增 API 客户端" open={apiClientOpen} onOk={submitAPIClient} onCancel={() => setApiClientOpen(false)} destroyOnClose>
+      <Modal title="新增 API 密钥" open={apiClientOpen} onOk={submitAPIClient} onCancel={() => setApiClientOpen(false)} destroyOnClose>
         <Form form={apiClientForm} layout="vertical" style={{ marginTop: 16 }}>
           <Form.Item name="name" label="名称" rules={[{ required: true }]}>
             <Input />
@@ -942,9 +958,15 @@ function featuresToList(features?: string) {
   return list.length > 0 ? list : ['products', 'orders', 'wallet', 'api', 'callbacks']
 }
 
-function resolveEnabledTab(current: string, features?: string) {
+function tabFromSearch(search: string): MerchantCenterTab | null {
+  const tab = new URLSearchParams(search).get('tab')
+  const allowedTabs: MerchantCenterTab[] = ['products', 'orders', 'wallet', 'api', 'callbacks', 'members']
+  return allowedTabs.includes(tab as MerchantCenterTab) ? tab as MerchantCenterTab : null
+}
+
+function resolveEnabledTab(current: MerchantCenterTab, features?: string): MerchantCenterTab {
   const enabled = new Set(featuresToList(features))
-  const tabFeatures: Record<string, string | null> = {
+  const tabFeatures: Record<MerchantCenterTab, string | null> = {
     products: 'products',
     orders: 'orders',
     wallet: 'wallet',
@@ -956,7 +978,7 @@ function resolveEnabledTab(current: string, features?: string) {
   if (feature === null || enabled.has(feature)) {
     return current
   }
-  return ['products', 'orders', 'wallet', 'api', 'callbacks'].find((key) => enabled.has(key)) || 'members'
+  return (['products', 'orders', 'wallet', 'api', 'callbacks'] as MerchantCenterTab[]).find((key) => enabled.has(key)) || 'members'
 }
 
 function money(value?: number | null) {
diff --git a/frontend/src/pages/OpenApiDocs.tsx b/frontend/src/pages/OpenApiDocs.tsx
index 81d1925..3aa1a4c 100644
--- a/frontend/src/pages/OpenApiDocs.tsx
+++ b/frontend/src/pages/OpenApiDocs.tsx
@@ -295,7 +295,7 @@ function OverviewSection() {
       title="概述"
       desc={
         <>
-          面向商户系统调用的开放 API。凭证在「商户中心 / API 客户端」创建，
+          面向商户系统调用的开放 API。凭证在「开放 API / API 密钥」创建，
           采用 <Text code>X-App-Key</Text> + HMAC-SHA256 签名鉴权。
           发货链路同时支持「返回签名链接」和「返回结构化数据」两种模式。
           <Text code>/api/open/v1</Text> 仍是上游回调链路，和本页的商户 API 分开。
@@ -309,7 +309,7 @@ function OverviewSection() {
         message="一句话上手"
         description={
           <ol style={{ margin: 0, paddingLeft: 20 }}>
-            <li>在「商户中心 / API 客户端」创建凭证，获得 <Text code>AppKey</Text> 与 <Text code>AppSecret</Text>。</li>
+            <li>在「开放 API / API 密钥」创建凭证，获得 <Text code>AppKey</Text> 与 <Text code>AppSecret</Text>。</li>
             <li>每次请求携带 <Text code>X-App-Key / X-Timestamp / X-Nonce / X-Sign</Text> 四个鉴权头。</li>
             <li>调用「商品列表」拿到可售 <Text code>sku</Text>，调用「下单」创建订单并扣款。</li>
             <li>拿到 <Text code>order_no</Text> 后，可选择返回发货链接，或者用结构化发货接口完成自建页面流程。</li>