feat(brand): rename product to 帮道

frontend/src/views/content/broadcast.vue

@@ -2,7 +2,7 @@
   <div class="broadcast-page">
     <section class="page-head">
       <div>
-        <h1>银城大喇叭</h1>
+        <h1>帮道大喇叭</h1>
         <p>向当前租户全员公开发布公司通知；可额外定向提醒项目、岗位或职级人员，并设置必读。撤回会停止员工端展示，但保留发布记录。</p>
       </div>
       <el-button type="danger" icon="Plus" :disabled="publishing || publishPending || !scopeTenantId || !storageAvailable" @click="openPublish">发布消息</el-button>
@@ -91,7 +91,7 @@
 
     <el-dialog
       v-model="publishVisible"
-      title="发布银城大喇叭消息"
+      title="发布帮道大喇叭消息"
       width="680px"
       destroy-on-close
       :close-on-click-modal="false"