功能：恢复商户账号分组查看

backend/internal/handler/user.go

@@ -29,6 +29,17 @@ func (h *UserHandler) ListPlatformAdmins(c *gin.Context) {
 	response.Page(c, list, total, page, size)
 }
 
+func (h *UserHandler) ListMerchantAccountGroups(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
+	list, total, err := h.svc.ListMerchantAccountGroups(page, size)
+	if err != nil {
+		response.ServerError(c, err.Error())
+		return
+	}
+	response.Page(c, list, total, page, size)
+}
+
 type createPlatformAdminReq struct {
 	Username string `json:"username" binding:"required"`
 	Password string `json:"password" binding:"required,min=6"`

backend/internal/router/router.go

@@ -193,6 +193,7 @@ func Setup(h *Handlers) *gin.Engine {
 			admin.Use(middleware.RequireRole(model.RoleAdmin))
 			{
 				admin.GET("/platform/admins", h.User.ListPlatformAdmins)
+				admin.GET("/platform/merchant-accounts", h.User.ListMerchantAccountGroups)
 				admin.POST("/platform/admins", h.User.CreatePlatformAdmin)
 				admin.PATCH("/platform/admins/:id", h.User.UpdatePlatformAdmin)
 				admin.DELETE("/platform/admins/:id", h.User.DeletePlatformAdmin)

backend/internal/service/merchant_test.go

@@ -266,6 +266,40 @@ func TestPlatformAdminCRUDDoesNotCreateMerchantMembership(t *testing.T) {
 	}
 }
 
+func TestListMerchantAccountGroupsExcludesPlatformAdmins(t *testing.T) {
+	db := newServiceTestDB(t)
+	merchantA := model.Merchant{Code: "merchant-accounts-a", Name: "商户账号 A", Status: model.MerchantStatusActive}
+	merchantB := model.Merchant{Code: "merchant-accounts-b", Name: "商户账号 B", Status: model.MerchantStatusActive}
+	employeeA := model.User{Username: "merchant-account-a", PasswordHash: "hash", Role: model.RoleMerchant, Status: 1}
+	employeeB := model.User{Username: "merchant-account-b", PasswordHash: "hash", Role: model.RoleMerchant, Status: 1}
+	admin := model.User{Username: "merchant-account-admin", PasswordHash: "hash", Role: model.RoleAdmin, Status: 1}
+	for _, entity := range []interface{}{&merchantA, &merchantB, &employeeA, &employeeB, &admin} {
+		if err := db.Create(entity).Error; err != nil {
+			t.Fatalf("create fixture: %v", err)
+		}
+	}
+	for _, member := range []model.MerchantMember{
+		{MerchantID: merchantA.ID, UserID: employeeA.ID, Role: model.MemberRoleOperator, Status: 1},
+		{MerchantID: merchantA.ID, UserID: employeeB.ID, Role: "support", Status: 1},
+		{MerchantID: merchantB.ID, UserID: admin.ID, Role: model.MemberRoleOwner, Status: 1},
+	} {
+		if err := db.Create(&member).Error; err != nil {
+			t.Fatalf("create membership: %v", err)
+		}
+	}
+
+	groups, total, err := NewUserService(db, nil).ListMerchantAccountGroups(1, 20)
+	if err != nil {
+		t.Fatalf("list merchant account groups: %v", err)
+	}
+	if total != 1 || len(groups) != 1 {
+		t.Fatalf("expected one merchant group, total=%d groups=%+v", total, groups)
+	}
+	if groups[0].MerchantID != merchantA.ID || groups[0].Merchant == nil || len(groups[0].Members) != 2 {
+		t.Fatalf("unexpected merchant account group: %+v", groups[0])
+	}
+}
+
 func TestEnsureAdminUsesConfiguredCredentialsOnlyForEmptyDatabase(t *testing.T) {
 	db := newServiceTestDB(t)
 	tenant := NewTenantService(db)

backend/internal/service/user.go

@@ -27,6 +27,14 @@ type UserListQuery struct {
 	Status     *int
 }
 
+// MerchantMemberGroup presents merchant accounts in their actual ownership
+// hierarchy: one merchant and all of its employee accounts.
+type MerchantMemberGroup struct {
+	MerchantID uint                   `json:"merchant_id"`
+	Merchant   *model.Merchant        `json:"merchant,omitempty"`
+	Members    []model.MerchantMember `json:"members"`
+}
+
 func (s *UserService) List(q UserListQuery) ([]model.User, int64, error) {
 	if q.Page < 1 {
 		q.Page = 1
@@ -123,6 +131,55 @@ func (s *UserService) ListPlatformAdmins(page, size int) ([]model.User, int64, e
 	return s.List(UserListQuery{Page: page, Size: size, Role: model.RoleAdmin})
 }
 
+// ListMerchantAccountGroups returns merchant employee accounts grouped by
+// merchant. Platform administrators are excluded from this independent view.
+func (s *UserService) ListMerchantAccountGroups(page, size int) ([]MerchantMemberGroup, int64, error) {
+	page, size = normalizePage(page, size)
+	tx := s.db.Model(&model.MerchantMember{}).
+		Joins("JOIN users ON users.id = merchant_members.user_id AND users.deleted_at IS NULL").
+		Where("users.role = ?", model.RoleMerchant)
+
+	var total int64
+	if err := tx.Distinct("merchant_members.merchant_id").Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+	var merchantIDs []uint
+	if err := tx.Distinct("merchant_members.merchant_id").
+		Order("merchant_members.merchant_id ASC").
+		Offset((page-1)*size).Limit(size).
+		Pluck("merchant_members.merchant_id", &merchantIDs).Error; err != nil {
+		return nil, 0, err
+	}
+	if len(merchantIDs) == 0 {
+		return []MerchantMemberGroup{}, total, nil
+	}
+
+	var members []model.MerchantMember
+	if err := s.db.Model(&model.MerchantMember{}).
+		Joins("JOIN users ON users.id = merchant_members.user_id AND users.deleted_at IS NULL").
+		Where("users.role = ? AND merchant_members.merchant_id IN ?", model.RoleMerchant, merchantIDs).
+		Preload("Merchant").Preload("User").
+		Order("merchant_members.merchant_id ASC, merchant_members.id ASC").
+		Find(&members).Error; err != nil {
+		return nil, 0, err
+	}
+
+	groups := make([]MerchantMemberGroup, 0, len(merchantIDs))
+	byMerchantID := make(map[uint]*MerchantMemberGroup, len(merchantIDs))
+	for _, merchantID := range merchantIDs {
+		groups = append(groups, MerchantMemberGroup{MerchantID: merchantID, Members: []model.MerchantMember{}})
+		byMerchantID[merchantID] = &groups[len(groups)-1]
+	}
+	for _, member := range members {
+		group := byMerchantID[member.MerchantID]
+		if group.Merchant == nil {
+			group.Merchant = member.Merchant
+		}
+		group.Members = append(group.Members, member)
+	}
+	return groups, total, nil
+}
+
 // CreatePlatformAdmin creates an account with platform-only privileges. It
 // deliberately does not assign the account to any merchant.
 func (s *UserService) CreatePlatformAdmin(username, password, nickname string) (*model.User, error) {

frontend/src/api/index.ts

@@ -18,6 +18,7 @@ import type {
   LowBalanceAlertConfig,
   Merchant,
 	MerchantMember,
+	MerchantMemberGroup,
 	MerchantRole,
   MerchantProduct,
   PageResult,
@@ -176,6 +177,8 @@ export const deliveryApi = {
 }
 
 export const platformApi = {
+  merchantAccounts: (params?: Record<string, unknown>) =>
+    request.get('/platform/merchant-accounts', { params }).then((r) => r.data.data as PageResult<MerchantMemberGroup>),
   merchants: (params?: Record<string, unknown>) =>
     request.get('/platform/merchants', { params }).then((r) => r.data.data as PageResult<Merchant>),
   createMerchant: (data: {

frontend/src/pages/PlatformUsers.tsx

@@ -1,12 +1,14 @@
-import { useCallback, useEffect, useState } from 'react'
-import { Button, Form, Input, Modal, Popconfirm, Space, Switch, Table, Tag, Typography, message } from 'antd'
+import { useCallback, useEffect, useMemo, useState } from 'react'
+import { Button, Form, Input, Modal, Popconfirm, Space, Switch, Table, Tabs, Tag, Typography, message } from 'antd'
 import { DeleteOutlined, EditOutlined, PlusOutlined, ReloadOutlined } from '@ant-design/icons'
 import type { ColumnsType } from 'antd/es/table'
-import { userApi } from '../api'
+import { platformApi, userApi } from '../api'
 import { PageHeader } from '../components/PageHeader'
-import type { PageResult, User } from '../types'
+import type { MerchantMember, MerchantMemberGroup, PageResult, User } from '../types'
 import { formatDateTime } from '../utils/time'
 import { useAuth } from '../store/auth'
+import { roleText } from './merchantCenterUtils'
+import { useNavigate } from 'react-router-dom'
 
 type AdminFormValues = {
   username: string
@@ -17,7 +19,10 @@ type AdminFormValues = {
 
 export default function PlatformUsers() {
   const { user: currentUser } = useAuth()
+  const navigate = useNavigate()
+  const [tab, setTab] = useState('admins')
   const [admins, setAdmins] = useState<PageResult<User>>({ list: [], total: 0, page: 1, size: 20 })
+  const [merchantAccounts, setMerchantAccounts] = useState<PageResult<MerchantMemberGroup>>({ list: [], total: 0, page: 1, size: 20 })
   const [loading, setLoading] = useState(false)
   const [submitting, setSubmitting] = useState(false)
   const [editingAdmin, setEditingAdmin] = useState<User | null>(null)
@@ -35,9 +40,21 @@ export default function PlatformUsers() {
     }
   }, [admins.page, admins.size])
 
+  const loadMerchantAccounts = useCallback(async (page = merchantAccounts.page, size = merchantAccounts.size) => {
+    setLoading(true)
+    try {
+      setMerchantAccounts(await platformApi.merchantAccounts({ page, size }))
+    } catch (e) {
+      message.error(e instanceof Error ? e.message : '加载失败')
+    } finally {
+      setLoading(false)
+    }
+  }, [merchantAccounts.page, merchantAccounts.size])
+
   useEffect(() => {
-    void loadAdmins()
-  }, [loadAdmins])
+    if (tab === 'admins') void loadAdmins()
+    else void loadMerchantAccounts()
+  }, [loadAdmins, loadMerchantAccounts, tab])
 
   const openCreate = () => {
     setEditingAdmin(null)
@@ -106,21 +123,75 @@ export default function PlatformUsers() {
     },
   ]
 
-  return (
-    <div>
-      <PageHeader
-        title="平台管理员"
-        subtitle="仅管理平台系统账号，不关联商户、商户员工或商户角色。"
-        breadcrumbs={[{ title: '账号管理' }]}
-        extra={<Space><Button icon={<ReloadOutlined />} loading={loading} onClick={() => void loadAdmins()}>刷新</Button><Button type="primary" icon={<PlusOutlined />} onClick={openCreate}>新建平台管理员</Button></Space>}
-      />
-      <Table
+  const memberColumns: ColumnsType<MerchantMember> = [
+    { title: '员工账号', dataIndex: ['user', 'username'], width: 260, render: (_, record) => <Typography.Text strong>{record.user?.username || `#${record.user_id}`}</Typography.Text> },
+    { title: '昵称', dataIndex: ['user', 'nickname'], width: 220, render: (_, record) => record.user?.nickname || '-' },
+    { title: '商户角色', dataIndex: 'role', width: 160, render: (role) => <Tag color="blue">{roleText(role)}</Tag> },
+    { title: '成员状态', dataIndex: 'status', width: 130, render: (status) => status === 1 ? <Tag color="green">启用</Tag> : <Tag>停用</Tag> },
+  ]
+
+  const merchantColumns: ColumnsType<MerchantMemberGroup> = [
+    {
+      title: '商户',
+      width: 320,
+      render: (_, record) => <Space direction="vertical" size={0}><Typography.Text strong>{record.merchant?.name || `商户#${record.merchant_id}`}</Typography.Text><Typography.Text type="secondary" style={{ fontSize: 12 }}>{record.merchant?.code || '-'}</Typography.Text></Space>,
+    },
+    { title: '下游账号', width: 130, render: (_, record) => `${record.members.length} 个` },
+    {
+      title: '角色分布',
+      render: (_, record) => {
+        const roles = [...new Set(record.members.map((member) => member.role))]
+        return <Space size={[4, 4]} wrap>{roles.map((role) => <Tag color="blue" key={role}>{roleText(role)}</Tag>)}</Space>
+      },
+    },
+    {
+      title: '操作',
+      width: 160,
+      render: (_, record) => <Button type="link" size="small" onClick={() => {
+        localStorage.setItem('merchant_id', String(record.merchant_id))
+        navigate('/merchant-members')
+      }}>管理商户成员</Button>,
+    },
+  ]
+
+  const items = useMemo(() => [
+    {
+      key: 'admins',
+      label: `平台管理员 (${admins.total})`,
+      children: <Table
         rowKey="id"
         loading={loading}
         columns={columns}
         dataSource={admins.list}
         pagination={{ current: admins.page, pageSize: admins.size, total: admins.total, showSizeChanger: true, onChange: (page, size) => void loadAdmins(page, size) }}
+      />,
+    },
+    {
+      key: 'merchant-accounts',
+      label: `商户账号 (${merchantAccounts.total})`,
+      children: <Table
+        rowKey="merchant_id"
+        loading={loading}
+        columns={merchantColumns}
+        dataSource={merchantAccounts.list}
+        expandable={{
+          expandedRowRender: (record) => <Table rowKey="id" size="small" columns={memberColumns} dataSource={record.members} pagination={false} />,
+          rowExpandable: (record) => record.members.length > 0,
+        }}
+        pagination={{ current: merchantAccounts.page, pageSize: merchantAccounts.size, total: merchantAccounts.total, showSizeChanger: true, onChange: (page, size) => void loadMerchantAccounts(page, size) }}
+      />,
+    },
+  ], [admins, columns, loadAdmins, loadMerchantAccounts, loading, memberColumns, merchantAccounts, merchantColumns])
+
+  return (
+    <div>
+      <PageHeader
+        title="账号管理"
+        subtitle="平台管理员独立管理；商户账号按所属商户展示，下游员工由各商户自行维护。"
+        breadcrumbs={[{ title: '账号管理' }]}
+        extra={<Space><Button icon={<ReloadOutlined />} loading={loading} onClick={() => tab === 'admins' ? void loadAdmins() : void loadMerchantAccounts()}>刷新</Button>{tab === 'admins' && <Button type="primary" icon={<PlusOutlined />} onClick={openCreate}>新建平台管理员</Button>}</Space>}
       />
+      <Tabs activeKey={tab} onChange={setTab} items={items} />
       <Modal
         title={editingAdmin ? '编辑平台管理员' : '新建平台管理员'}
         open={modalOpen}

frontend/src/types/index.ts

@@ -33,6 +33,12 @@ export interface MerchantMember {
   created_at: string
 }
 
+export interface MerchantMemberGroup {
+  merchant_id: number
+  merchant?: Merchant
+  members: MerchantMember[]
+}
+
 export interface MerchantRole {
   id: number
   merchant_id: number