build: 重新构建前端资源文件，更新资源哈希

1.  更新index.html中引入的资源文件哈希
2.  新增/替换业务组件的打包资源文件
3.  删除旧的哈希命名的冗余资源文件
4.  同步更新PageHelp.vue组件逻辑，支持顶层字段渲染

bj_power_wms_client/frontend/src/components/PageHelp.vue

@@ -19,6 +19,19 @@
           <span class="lg"><i class="ic lg-fill"></i>怎么填：具体填什么</span>
         </div>
 
+        <!-- 顶层字段（主表单说明） -->
+        <div v-if="data.fields && data.fields.length" class="ph-section">
+          <div class="ph-field" v-for="(f, fi) in data.fields" :key="'top'+fi">
+            <div class="ph-fname">
+              {{ f.name }}
+              <span class="ph-fsource">{{ f.source }}</span>
+            </div>
+            <div class="ph-fpurpose">{{ f.purpose }}</div>
+            <div class="ph-ffill">👉 {{ f.fill }}</div>
+          </div>
+        </div>
+
+        <!-- 分组（多组） -->
         <template v-if="data.sections && data.sections.length">
           <div v-for="(sec, si) in data.sections" :key="si" class="ph-section">
             <div class="ph-sec-title" v-if="sec.title">{{ sec.title }}</div>
@@ -34,19 +47,9 @@
           </div>
         </template>
 
-        <div v-else class="ph-section">
-          <template v-if="data.fields && data.fields.length">
-            <div class="ph-field" v-for="(f, fi) in data.fields" :key="fi">
-              <div class="ph-fname">
-                {{ f.name }}
-                <span class="ph-fsource">{{ f.source }}</span>
-              </div>
-              <div class="ph-fpurpose">{{ f.purpose }}</div>
-              <div class="ph-ffill">👉 {{ f.fill }}</div>
-            </div>
-          </template>
-          <el-empty v-else description="暂无说明" :image-size="70" />
-        </div>
+        <!-- 既无顶层字段也无分组 -->
+        <el-empty v-if="!data.fields && !(data.sections && data.sections.length)"
+          description="暂无说明" :image-size="70" />
       </div>
     </el-drawer>
   </div>