feat(HRM): 添加附件显示组件并优化表单逻辑

添加FileList组件用于显示附件列表
在请假和外出申请详情页中显示附件
优化审批部门选择逻辑，仅在新增时显示
修复请假申请编辑时的审批类型校验问题

klp-ui/src/components/FileList/index.vue

@@ -0,0 +1,119 @@
+<template>
+  <div class="file-list-container">
+    <el-table 
+      :data="fileList" 
+      border 
+      size="small" 
+      v-loading="loading"
+      style="width: 100%;"
+    >
+      <el-table-column 
+        label="文件名" 
+        prop="originalName" 
+        min-width="200"
+      >
+        <template slot-scope="scope">
+          <i class="el-icon-document" style="margin-right: 8px;"></i>
+          {{ scope.row.originalName }}
+        </template>
+      </el-table-column>
+      <el-table-column 
+        label="操作" 
+        width="100" 
+        align="center"
+      >
+        <template slot-scope="scope">
+          <el-button 
+            type="text" 
+            icon="el-icon-download" 
+            @click="downloadFile(scope.row)"
+            size="small"
+          >
+            下载
+          </el-button>
+        </template>
+      </el-table-column>
+    </el-table>
+    
+    <!-- 空数据提示 -->
+    <div v-if="fileList.length === 0 && !loading" class="empty-tip">
+      <el-empty description="暂无文件数据"></el-empty>
+    </div>
+  </div>
+</template>
+
+<script>
+import { listByIds } from "@/api/system/oss";
+
+export default {
+  name: "FileList",
+  props: {
+    ossIds: {
+      type: String,
+      default: '',
+    },
+  },
+  data() {
+    return {
+      fileList: [],
+      loading: false // 加载状态
+    }
+  },
+  watch: {
+    ossIds: {
+      handler(val) {
+        if (val) {
+          this.getFileList();
+        } else {
+          this.fileList = []; // 清空文件列表
+        }
+      },
+      immediate: true,
+    }
+  },
+  methods: {
+    async getFileList() {
+      if (!this.ossIds) return;
+      
+      this.loading = true;
+      try {
+        let res = await listByIds(this.ossIds);
+        this.fileList = res.data || [];
+      } catch (error) {
+        this.$message.error('获取文件列表失败：' + (error.message || '未知错误'));
+        this.fileList = [];
+      } finally {
+        this.loading = false;
+      }
+    },
+    
+    // 文件下载方法
+    downloadFile(file) {
+      if (!file || !file.ossId) {
+        this.$message.warning('文件下载地址不存在');
+        return;
+      }
+      this.$download.oss(file.ossId);
+    }
+  }
+}
+</script>
+
+<style scoped>
+.file-list-container {
+  width: 100%;
+  min-height: 100px;
+}
+
+.empty-tip {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  height: 200px;
+}
+
+::v-deep .el-table {
+  --el-table-header-text-color: #606266;
+  --el-table-row-hover-bg-color: #f5f7fa;
+}
+</style>