feat: 添加UI优化和用户体验增强

- 新增lastImportInfo计算属性显示导入统计
- 失败记录按钮添加tooltip显示导入时间
- 失败记录对话框添加统计信息展示
- 对话框添加清除历史记录按钮

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

ruoyi-ui/src/views/ccdiEmployee/index.vue

@@ -68,13 +68,18 @@
         >导入</el-button>
       </el-col>
       <el-col :span="1.5" v-if="showFailureButton">
-        <el-button
-          type="warning"
-          plain
-          icon="el-icon-warning"
-          size="mini"
-          @click="viewImportFailures"
-        >查看导入失败记录</el-button>
+        <el-tooltip
+          :content="getLastImportTooltip()"
+          placement="top"
+        >
+          <el-button
+            type="warning"
+            plain
+            icon="el-icon-warning"
+            size="mini"
+            @click="viewImportFailures"
+          >查看导入失败记录</el-button>
+        </el-tooltip>
       </el-col>
       <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
     </el-row>
@@ -272,6 +277,14 @@
       width="1200px"
       append-to-body
     >
+      <el-alert
+        v-if="lastImportInfo"
+        :title="lastImportInfo"
+        type="info"
+        :closable="false"
+        style="margin-bottom: 15px"
+      />
+
       <el-table :data="failureList" v-loading="failureLoading">
         <el-table-column label="姓名" prop="name" align="center" />
         <el-table-column label="柜员号" prop="employeeId" align="center" />
@@ -290,6 +303,7 @@
 
       <div slot="footer" class="dialog-footer">
         <el-button @click="failureDialogVisible = false">关闭</el-button>
+        <el-button type="danger" plain @click="clearImportHistory">清除历史记录</el-button>
       </div>
     </el-dialog>
   </div>
@@ -413,6 +427,18 @@ export default {
       }
     };
   },
+  computed: {
+    /**
+     * 上次导入信息摘要
+     */
+    lastImportInfo() {
+      const savedTask = this.getImportTaskFromStorage();
+      if (savedTask && savedTask.totalCount) {
+        return `导入时间: ${this.parseTime(savedTask.saveTime)} | 总数: ${savedTask.totalCount}条 | 成功: ${savedTask.successCount}条 | 失败: ${savedTask.failureCount}条`;
+      }
+      return '';
+    }
+  },
   created() {
     this.getList();
     this.getDeptTree();