feat(wms): 新增标签预览功能及相关组件

添加盐雾试验、力学性能、样品、生产和外标签预览组件
实现标签图片下载和打印功能
调整钢卷管理页面布局和功能
优化大屏展示的全屏处理逻辑

klp-ui/src/views/wms/coil/panels/LabelRender/index.vue

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+<template>
+  <div class="label-render-container">
+    <!-- 操作按钮 -->
+    <div class="action-buttons">
+      <el-button type="primary" @click="downloadLabelAsImage">下载标签图片</el-button>
+      <el-button type="primary" @click="printLabel" style="margin-left: 10px;">打印标签</el-button>
+    </div>
+    <!-- 标签预览容器 -->
+    <div class="preview-container" id="label-preview-container" ref="labelRef">
+      <ProductionTagPreview v-if="labelType === '2'" :content="content" />
+      <OuterTagPreview v-if="labelType === '3'" :content="content" />
+      <SampleTagPreview v-if="labelType === '4'" :content="content" />
+      <ForgeTagPreview v-if="labelType === '5'" :content="content" />
+      <SaltSprayTagPreview v-if="labelType === '6'" :content="content" />
+    </div>
+  </div>
+</template>
+
+<script>
+import domToImage from 'dom-to-image';
+import printJS from 'print-js';
+import { Message } from 'element-ui'; // 若使用Element UI，引入消息提示
+
+import ProductionTagPreview from './ProductionTagPreview.vue';
+import OuterTagPreview from './OuterTagPreview.vue';
+import SampleTagPreview from './SampleTagPreview.vue';
+import ForgeTagPreview from './ForgeTagPreview.vue';
+import SaltSprayTagPreview from './SaltSprayTagPreview.vue';
+
+export default {
+  name: 'LabelRender',
+  components: {
+    ProductionTagPreview,
+    OuterTagPreview,
+    SampleTagPreview,
+    ForgeTagPreview,
+    SaltSprayTagPreview,
+  },
+  props: {
+    labelType: {
+      type: String,
+      required: true,
+    },
+    content: {
+      type: Object,
+      required: true,
+    },
+  },
+  methods: {
+    // -------- 图片下载方法 --------
+    async downloadLabelAsImage() {
+      // 1. 获取要转换的DOM容器
+      const labelContainer = document.getElementById('label-preview-container');
+      if (!labelContainer) {
+        Message.error('未找到标签容器，无法下载');
+        return;
+      }
+
+      try {
+        // 2. 用dom-to-image生成PNG图片的DataURL
+        const dataUrl = await domToImage.toPng(labelContainer);
+
+        // 3. 创建临时a标签，触发下载
+        const downloadLink = document.createElement('a');
+        downloadLink.href = dataUrl;
+        downloadLink.download = `标签_${new Date().getTime()}.png`; // 自定义文件名（带时间戳防重复）
+        document.body.appendChild(downloadLink);
+        downloadLink.click();
+        document.body.removeChild(downloadLink); // 下载后移除临时标签
+      } catch (error) {
+        console.error('标签图片下载失败：', error);
+        Message.error('标签图片下载失败，请重试');
+      }
+    },
+
+    // 打印方法
+    printLabel() {
+      // 1. 获取标签容器DOM
+      const labelContainer = document.getElementById('label-preview-container');
+      if (!labelContainer) {
+        Message.error('未找到标签容器，无法打印');
+        return;
+      }
+
+      // 4. 调用print-js打印
+      printJS({
+        printable: 'label-preview-container', // 要打印的元素ID
+        type: 'html', // 打印类型为HTML
+        header: null, // 不显示页眉
+        footer: null, // 不显示页脚
+        // style: printStyles, // 注入打印样式
+        scanStyles: true, // 禁用自动扫描页面样式（避免冲突）
+        targetStyles: ['*'], // 允许所有样式生效
+        printContainer: true, // 打印指定容器
+        onError: (error) => { // 错误处理
+          console.error('打印失败:', error);
+          Message.error('打印失败，请重试');
+        }
+      });
+    }
+  },
+};
+</script>
+
+<style scoped>
+.label-render-container {
+  width: 100%;
+  height: calc(100vh - 200px);
+  display: flex;
+  flex-direction: column;
+  /* 按钮与预览垂直排列 */
+  justify-content: flex-start;
+  align-items: center;
+  padding: 2rem;
+  box-sizing: border-box;
+}
+
+.action-buttons {
+  margin-bottom: 1rem;
+  /* 按钮与预览区的间距 */
+}
+
+.preview-container {
+  background-color: #fff;
+  color: #000;
+  padding: 1.5rem;
+  width: fit-content;
+  min-width: 200px;
+  border-radius: 6px;
+  box-shadow: 0 0 60px rgba(255, 255, 255, 0.2);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  overflow: hidden;
+  transition: all 0.3s ease;
+}
+
+.preview-container:hover {
+  box-shadow: 0 0 80px rgba(255, 255, 255, 0.3);
+  transform: translateY(-2px);
+}
+</style>