fix(hrm): 将请假时长单位从天改为小时

修改所有相关组件中的请假时长显示单位，从"天"改为"小时"，包括图表、表格和表单中的标签。同时调整时间差计算逻辑，直接计算小时数而非天数。

klp-ui/src/views/wms/hrm/apply/leave.vue

@@ -49,7 +49,7 @@
                     :value="dict.value"></el-option>
                 </el-select>
               </el-form-item>
-              <el-form-item label="请假天数" :prop="`list[${index}].leaveDays`" :rules="rules.listItem.leaveDays">
+              <el-form-item label="请假小时" :prop="`list[${index}].leaveDays`" :rules="rules.listItem.leaveDays">
                 <el-input v-model="item.leaveDays" placeholder="选择时间后自动计算，也可手动修改" />
               </el-form-item>
               <el-form-item label="请假原因" :prop="`list[${index}].leaveReason`" :rules="rules.listItem.leaveReason">
@@ -126,7 +126,7 @@
               </template>
             </el-table-column>
             <el-table-column label="具体原因" align="center" prop="leaveReason" show-overflow-tooltip />
-            <el-table-column label="请假天数" align="center" prop="leaveDays" />
+            <el-table-column label="请假小时" align="center" prop="leaveDays" />
             <el-table-column label="操作" align="center" width="160">
               <template slot-scope="scope" v-if="scope.row.approvalStatus === '待审批'">
                 <el-button icon="el-icon-edit" size="mini" @click="handleEdit(scope.row)">修改</el-button>
@@ -459,7 +459,7 @@ export default {
         }
         // 计算时间差(毫秒) → 转天 → 保留2位小数
         const diffTime = end - start;
-        const diffDays = (diffTime / (1000 * 60 * 60 * 24)).toFixed(2);
+        const diffDays = parseInt(diffTime / (1000 * 60 * 60));
         // 赋值到对应行的天数输入框
         item.leaveDays = diffDays;
       }