优化平台商户管理表格列宽分布

frontend/src/pages/PlatformMerchants.tsx

@@ -169,22 +169,22 @@ export default function PlatformMerchants() {
   }
 
   const columns: ColumnsType<Merchant> = [
-    { title: 'ID', dataIndex: 'id', width: 80 },
-    { title: '编码', dataIndex: 'code', width: 180, render: (v) => <Typography.Text code copyable>{v}</Typography.Text> },
-    { title: '名称', dataIndex: 'name', ellipsis: true },
+    { title: 'ID', dataIndex: 'id', width: 70, align: 'center' },
+    { title: '编码', dataIndex: 'code', width: 160, render: (v) => <Typography.Text code copyable={{ text: v }}>{v}</Typography.Text> },
+    { title: '商户名称', dataIndex: 'name', width: 200, ellipsis: true, render: (v) => <span style={{ fontWeight: 600, color: '#0f172a' }}>{v}</span> },
     { title: '联系人', dataIndex: 'contact_name', width: 120, render: (v) => v || '-' },
-    { title: '联系方式', dataIndex: 'contact_info', width: 160, render: (v) => v || '-' },
+    { title: '联系方式', dataIndex: 'contact_info', width: 150, render: (v) => v || '-' },
     {
-      title: '手续费',
+      title: '手续费率',
       key: 'fee',
-      width: 160,
+      width: 140,
       render: (_, r) =>
         r.fee_type === 'fixed'
           ? `固定 ${r.fee_fixed_amount} 积分/单`
           : `${(r.fee_rate_bp / 100).toFixed(2)}%`,
     },
     {
-      title: '功能',
+      title: '开通功能',
       dataIndex: 'features',
       width: 220,
       render: (v) => (
@@ -212,11 +212,12 @@ export default function PlatformMerchants() {
           </span>
         ),
     },
-    { title: '创建时间', dataIndex: 'created_at', width: 180, render: formatDateTime },
+    { title: '创建时间', dataIndex: 'created_at', width: 170, render: formatDateTime },
     {
       title: '操作',
       key: 'action',
-      width: 260,
+      width: 240,
+      fixed: 'right',
       render: (_, record) => (
         <Space size={0}>
           <Button
@@ -308,7 +309,7 @@ export default function PlatformMerchants() {
         loading={loading}
         columns={columns}
         dataSource={data.list}
-        tableLayout="fixed"
+        scroll={{ x: 1400 }}
         pagination={{
           current: data.page,
           pageSize: data.size,