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fix: RuleList 规则名称列 prop standard_name→name

后端 RuleVO.name Jackson 序列化为 name，与 snake_case 策略一致。
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frontend/src/views/module_payment/institution/components/RuleList.vue

@@ -17,7 +17,7 @@
       </template>
       <el-table-column type="index" label="序号" width="60" align="center" />
       <el-table-column prop="rule_id" label="规则ID" min-width="160" show-overflow-tooltip />
-      <el-table-column prop="standard_name" label="规则名称" min-width="140" />
+      <el-table-column prop="name" label="规则名称" min-width="140" />
       <el-table-column label="单笔限额" width="100" align="right">
         <template #default="scope">
           {{ scope.row.single_limit ? `¥${scope.row.single_limit}` : (scope.row.max_amount ? `¥${scope.row.max_amount}` : "-") }}