style(audit): 优化审计页面时间筛选布局

- 在充值审计和退款审计页面中，为"充值时间"和"提交时间"标签添加固定宽度

src/views/audit/rechargeAudit.vue

@@ -33,7 +33,7 @@
           <el-col :span="12">
             <div class="time-controls">
               <div class="time-group">
-                <el-text size="large">充值时间：</el-text>
+                <el-text size="large" style="width: 80px">充值时间：</el-text>
                 <el-date-picker v-model="getTime" type="datetimerange" range-separator="至" start-placeholder="起始时间"
                                 end-placeholder="结束时间" style="width: 400px"/>
                 <el-button @click="getToday()" style="margin-left: 10px"> 今</el-button>

src/views/audit/refundAudit.vue

@@ -32,7 +32,7 @@
             <el-col :span="15">
               <div class="time-controls">
                 <div class="time-group">
-                  <el-text size="large">提交时间：</el-text>
+                  <el-text size="large" style="width: 80px">提交时间：</el-text>
                   <el-date-picker v-model="dateRange" type="datetimerange" range-separator="至" start-placeholder="开始时间"
                     end-placeholder="结束时间" style="width: 400px" />
                   <el-button @click="getToday()" style="margin-left: 10px">今</el-button>