feat(distribution): 分销站点增加用户数量统计与用户信息展示模块

- 数据模型与迁移: 新增 000082 迁移在 users 表追加 distribution_site_id 并建索引，用户首次在分销站点注册/短信登录时自动绑定站点归属
- 分销管理接口: 新增 GET /admin/distribution/users 接口，聚合本站注册用户与下单客户，返回完整11位手机号、累计消费金额、订单数及来源标签
- 统计与大盘扩展: GET /admin/distribution/sites/:id/analytics 补全今日注册、累计用户、成交客户指标，主站分销商列表追加用户体量展示
- 分销后台前端: 新增「客户与用户」页面 (Users.tsx) 支持一键复制手机号与订单穿透，大盘 (Dashboard.tsx) 增加用户规模核心卡片
- 自动化测试与门禁: 新增 TestListDistributionUsersAndAnalytics 单元测试，通过全量 Go 后端集成测试及前后端构建检查

distribution-admin/src/pages/Dashboard.tsx

@@ -20,6 +20,8 @@ import {
   LineChartOutlined,
   ArrowRightOutlined,
   SkinOutlined,
+  TeamOutlined,
+  ShoppingOutlined,
 } from '@ant-design/icons'
 import { Link } from 'react-router-dom'
 import {
@@ -197,34 +199,35 @@ export default function Dashboard() {
 
       {/* 核心业务指标看板 */}
       <Row gutter={[16, 16]}>
-        <Col xs={24} sm={12} md={8} lg={4}>
-          <Card bordered={false} style={{ background: '#fafafa' }} loading={loading}>
+        <Col xs={24} sm={12} md={6}>
+          <Card bordered={false} style={{ background: '#f6ffed', border: '1px solid #b7eb8f' }} loading={loading}>
             <Statistic
-              title="今日收号 / 累计收号"
-              value={analytics?.today_received_count ?? 0}
-              suffix={`/ ${analytics?.total_received_count ?? 0} 个`}
-              valueStyle={{ color: '#1677ff', fontWeight: 'bold' }}
-            />
-            <div style={{ marginTop: 8 }}>
-              <Link to="/receive" style={{ fontSize: 12 }}>查看收号资产 <ArrowRightOutlined /></Link>
-            </div>
-          </Card>
-        </Col>
-        <Col xs={24} sm={12} md={8} lg={4}>
-          <Card bordered={false} style={{ background: '#fafafa' }} loading={loading}>
-            <Statistic
-              title="在售可租货源"
-              value={analytics?.active_listing_count ?? 0}
-              prefix={<AppstoreOutlined style={{ color: '#52c41a' }} />}
-              suffix="个"
+              title="今日注册 / 累计用户"
+              value={analytics?.today_user_count ?? 0}
+              suffix={`/ ${analytics?.total_user_count ?? 0} 人`}
+              prefix={<TeamOutlined style={{ color: '#52c41a' }} />}
               valueStyle={{ color: '#52c41a', fontWeight: 'bold' }}
             />
             <div style={{ marginTop: 8 }}>
-              <Link to="/accounts" style={{ fontSize: 12 }}>管理商品货架 <ArrowRightOutlined /></Link>
+              <Link to="/users" style={{ fontSize: 12 }}>查看客户列表 <ArrowRightOutlined /></Link>
             </div>
           </Card>
         </Col>
-        <Col xs={24} sm={12} md={8} lg={4}>
+        <Col xs={24} sm={12} md={6}>
+          <Card bordered={false} style={{ background: '#fff7e6', border: '1px solid #ffd591' }} loading={loading}>
+            <Statistic
+              title="本站成交客户"
+              value={analytics?.total_order_user_count ?? 0}
+              suffix="人"
+              prefix={<ShoppingOutlined style={{ color: '#fa8c16' }} />}
+              valueStyle={{ color: '#fa8c16', fontWeight: 'bold' }}
+            />
+            <div style={{ marginTop: 8 }}>
+              <Link to="/users" style={{ fontSize: 12 }}>成交客户分析 <ArrowRightOutlined /></Link>
+            </div>
+          </Card>
+        </Col>
+        <Col xs={24} sm={12} md={6}>
           <Card bordered={false} style={{ background: '#fafafa' }} loading={loading}>
             <Statistic
               title="今日订单量"
@@ -238,7 +241,7 @@ export default function Dashboard() {
             </div>
           </Card>
         </Col>
-        <Col xs={24} sm={12} md={8} lg={4}>
+        <Col xs={24} sm={12} md={6}>
           <Card bordered={false} style={{ background: '#fafafa' }} loading={loading}>
             <Statistic
               title="今日成交 GMV"
@@ -251,7 +254,34 @@ export default function Dashboard() {
             </div>
           </Card>
         </Col>
-        <Col xs={24} sm={12} md={8} lg={4}>
+        <Col xs={24} sm={12} md={6}>
+          <Card bordered={false} style={{ background: '#fafafa' }} loading={loading}>
+            <Statistic
+              title="今日收号 / 累计收号"
+              value={analytics?.today_received_count ?? 0}
+              suffix={`/ ${analytics?.total_received_count ?? 0} 个`}
+              valueStyle={{ color: '#1677ff', fontWeight: 'bold' }}
+            />
+            <div style={{ marginTop: 8 }}>
+              <Link to="/receive" style={{ fontSize: 12 }}>查看收号资产 <ArrowRightOutlined /></Link>
+            </div>
+          </Card>
+        </Col>
+        <Col xs={24} sm={12} md={6}>
+          <Card bordered={false} style={{ background: '#fafafa' }} loading={loading}>
+            <Statistic
+              title="在售可租货源"
+              value={analytics?.active_listing_count ?? 0}
+              prefix={<AppstoreOutlined style={{ color: '#52c41a' }} />}
+              suffix="个"
+              valueStyle={{ color: '#52c41a', fontWeight: 'bold' }}
+            />
+            <div style={{ marginTop: 8 }}>
+              <Link to="/accounts" style={{ fontSize: 12 }}>管理商品货架 <ArrowRightOutlined /></Link>
+            </div>
+          </Card>
+        </Col>
+        <Col xs={24} sm={12} md={6}>
           <Card bordered={false} style={{ background: '#fafafa' }} loading={loading}>
             <Statistic
               title="本月预估分润收益"
@@ -265,14 +295,14 @@ export default function Dashboard() {
             </div>
           </Card>
         </Col>
-        <Col xs={24} sm={12} md={8} lg={4}>
-          <Card bordered={false} style={{ background: '#f6ffed', border: '1px solid #b7eb8f' }} loading={loading}>
+        <Col xs={24} sm={12} md={6}>
+          <Card bordered={false} style={{ background: '#e6f4ff', border: '1px solid #91caff' }} loading={loading}>
             <Statistic
               title="钱包可提现余额"
               value={((analytics?.available_balance_cent ?? 0) / 100).toFixed(2)}
-              prefix={<WalletOutlined style={{ color: '#52c41a' }} />}
+              prefix={<WalletOutlined style={{ color: '#1677ff' }} />}
               suffix="元"
-              valueStyle={{ color: '#52c41a', fontWeight: 'bold' }}
+              valueStyle={{ color: '#1677ff', fontWeight: 'bold' }}
             />
             <div style={{ marginTop: 8 }}>
               <Link to="/wallet" style={{ fontSize: 12 }}>立即提现 <ArrowRightOutlined /></Link>