refactor: 简化 Chat 页面移除推荐智能体模块

- 移除 selectAgentAndCreateSession 方法
- 移除推荐智能体卡片区域
- 精简页面代码

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/views/Chat.vue

@@ -189,18 +189,6 @@ const handleSelectModel = (model: any) => {
   showModelDropdown.value = false
 }
 
-// 选择智能体并创建会话
-const selectAgentAndCreateSession = async (agent: any) => {
-  selectedAgent.value = agent
-  const session = await createSession()
-  if (session) {
-    messages.value = [
-      { id: Date.now(), role: 'assistant', content: `你好！我是 ${agent.name}，有什么我可以帮助你的吗？`, timestamp: new Date() }
-    ]
-    await saveMessage('assistant', messages.value[0].content)
-  }
-}
-
 // 删除会话
 const handleDeleteSession = async (session: any) => {
   try {
@@ -326,28 +314,6 @@ onUnmounted(() => {
               <i class="fa-solid fa-plus mr-2"></i>
               开始新对话
             </button>
-
-            <!-- 推荐智能体 -->
-            <div v-if="chatAgents.length > 0" class="recommend-section">
-              <div class="recommend-title">或选择一个智能体</div>
-              <div class="recommend-cards">
-                <div
-                  v-for="agent in chatAgents.slice(0, 4)"
-                  :key="agent.id"
-                  class="recommend-card"
-                  @click="selectAgentAndCreateSession(agent)"
-                >
-                  <div
-                    class="recommend-avatar"
-                    :style="{ backgroundColor: agent.accentColor + '20', color: agent.accentColor }"
-                  >
-                    {{ agent.avatar }}
-                  </div>
-                  <div class="recommend-name">{{ agent.name }}</div>
-                  <div class="recommend-desc">{{ agent.description || 'AI 助手' }}</div>
-                </div>
-              </div>
-            </div>
           </div>
         </div>
         <!-- 有会话但无消息时显示欢迎提示 -->