feat: 添加查看导入失败记录按钮

- 在导出按钮后添加"查看导入失败记录"按钮
- 按钮仅在存在失败记录时显示(v-if="showFailureButton")
- 使用tooltip显示上次导入时间信息

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

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

@@ -76,6 +76,20 @@
           v-hasPermi="['ccdi:purchaseTransaction:export']"
         >导出</el-button>
       </el-col>
+      <el-col :span="1.5" v-if="showFailureButton">
+        <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>