feat: 为多个页面添加操作帮助功能，替换旧版静态资源文件

1. 新增PageHelp通用帮助组件，实现页面左下角悬浮帮助按钮
2. 为WMS、MES、工位终端多个业务页面接入帮助系统
3. 替换项目中旧的打包静态资源文件，更新资源引用路径
4. 新增各模块的帮助文档配置数据

bj_power_workstation/frontend/src/components/PageHelp.vue

@@ -0,0 +1,54 @@
+<template>
+  <!-- 页面右下角 "?" 帮助按钮：点击弹出当前界面整体介绍 + 关键字段说明 -->
+  <div class="page-help">
+    <el-tooltip content="操作说明" placement="top">
+      <el-button class="help-fab" circle @click="open">?</el-button>
+    </el-tooltip>
+
+    <el-drawer v-model="show" :title="data.title || '操作说明'" size="480px" append-to-body>
+      <div class="ph-overview" v-if="data.overview">{{ data.overview }}</div>
+
+      <div v-if="data.sections && data.sections.length">
+        <div v-for="(sec, si) in data.sections" :key="si">
+          <h3 class="ph-sec-title">{{ sec.title }}</h3>
+          <p class="ph-sec-overview" v-if="sec.overview">{{ sec.overview }}</p>
+          <el-table :data="sec.fields" border size="small" class="ph-table">
+            <el-table-column prop="name" label="字段" width="120" />
+            <el-table-column prop="source" label="来源" width="80" />
+            <el-table-column prop="purpose" label="用途" min-width="110" show-overflow-tooltip />
+            <el-table-column prop="fill" label="怎么操作" min-width="130" show-overflow-tooltip />
+          </el-table>
+        </div>
+      </div>
+
+      <el-table v-else :data="data.fields" border size="small" class="ph-table">
+        <el-table-column prop="name" label="字段" width="120" />
+        <el-table-column prop="source" label="来源" width="80" />
+        <el-table-column prop="purpose" label="用途" min-width="110" show-overflow-tooltip />
+        <el-table-column prop="fill" label="怎么操作" min-width="130" show-overflow-tooltip />
+      </el-table>
+    </el-drawer>
+  </div>
+</template>
+
+<script setup>
+import { ref } from 'vue'
+
+defineProps({
+  data: { type: Object, default: () => ({ title: '操作说明', overview: '', fields: [] }) }
+})
+
+const show = ref(false)
+function open() { show.value = true }
+</script>
+
+<style scoped>
+.page-help { position: fixed; right: 20px; bottom: 20px; z-index: 2000; }
+.help-fab { width: 58px; height: 58px; background: #1668dc; color: #fff; font-weight: 700;
+  font-size: 26px; box-shadow: 0 3px 10px rgba(22,50,79,.35); }
+.help-fab:hover { background: #0e57c3; }
+.ph-overview { color: #555; line-height: 1.7; margin-bottom: 14px; white-space: pre-line; }
+.ph-sec-title { margin: 12px 0 4px; font-size: 15px; }
+.ph-sec-overview { color: #777; margin: 4px 0 8px; line-height: 1.6; font-size: 13px; }
+.ph-table :deep(.el-table__cell), .ph-table :deep(td.el-table__cell) { padding: 4px 6px; font-size: 12px; }
+</style>