Rename product to Dabenying QA assistant

ai_knowledge_base_v2/apps/user-client/src/components/ChatMessage.vue

@@ -57,7 +57,7 @@ const renderedContent = computed(() => {
 
 <template>
   <article class="message" :class="role">
-    <div class="avatar">{{ role === "assistant" ? "AI" : "我" }}</div>
+    <div class="avatar">{{ role === "assistant" ? "答" : "我" }}</div>
     <div class="bubble">
       <template v-if="role === 'assistant'">
         <div v-if="streaming && assistantParts.reasoning" class="thinking-indicator">

ai_knowledge_base_v2/apps/user-client/src/components/LoginPanel.vue

@@ -76,9 +76,9 @@ function showError(text: string) {
 
 <template>
   <section class="login-panel">
-    <div class="brand-mark">AI</div>
-    <h1>AI知识库助手</h1>
-    <p>企业知识统一问答入口</p>
+    <div class="brand-mark">答</div>
+    <h1>大本营答疑助手</h1>
+    <p>围绕大本营知识库，为学员提供及时、可信的答疑支持。</p>
 
     <label>
       手机号