chore：AI回答显示思考...

pages_tool/ai-chat/ai-chat-message.vue

@@ -1115,7 +1115,8 @@ async sendStreamMessage(userMessage, attachments = []) {
   } else {
     targetMsg = this.messages[loadingIdx]
     this._stopLoadingTextRotation(targetMsg)
-    targetMsg.loadingText = this.$lang('ai-chat.index.receivingReply')
+    // 固定文案, 不走 $lang: 远端语言覆写会覆盖本地 lang 文件, 导致改了 lang/zh-cn 也不生效
+    targetMsg.loadingText = '思考中'
     // 进入流式接收状态: 让思考面板在收到 thought 事件时自动展开并显示"思考中..."
     this.$set(targetMsg, 'isStreaming', true)
     if (!targetMsg.thoughtsText) this.$set(targetMsg, 'thoughtsText', '')
@@ -3169,7 +3170,8 @@ _handleStreamError(msg) {
               gap: 12rpx;
               
               .typing-dots {
-                display: flex;
+                /* 隐藏三个圆点动画 */
+                display: none !important;
                 align-items: center;
                 
                 .dot {