refactor(contract/export/preview): 优化合同打印导出功能，添加页码和修复样式

1.  移除coilTable的异常行高亮逻辑
2.  修复导航栏告警badge的显示逻辑
3.  为合同导出和预览添加页码标注，调整打印样式
4.  移除冗余的合同打印预览代码

klp-ui/src/layout/components/Navbar.vue

@@ -12,7 +12,7 @@
           <el-icon class="el-icon-document-checked" />
         </div>
         <div class="right-menu-item hover-effect" @click="gotoWarning" title="告警信息">
-          <el-badge :is-dot="hasWarning" class="nav-badge">
+          <el-badge :value="hasWarning || ''" class="nav-badge">
             <el-icon class="el-icon-bell" />
           </el-badge>
         </div>
@@ -116,9 +116,9 @@ export default {
     },
     checkWarning() {
       listMaterialWarning({ pageNum: 1, pageSize: 1, warningStatus: '0' }).then(response => {
-        this.hasWarning = response.total > 0
+        this.hasWarning = response.total
       }).catch(() => {
-        this.hasWarning = false
+        this.hasWarning = 0
       })
     },
     async logout() {