重新构建dev产物（注册持久化登录、白屏崩溃、视频缩略图三处修复）

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

umd/src_views_messages-view_jsx.dev.js

@@ -3670,8 +3670,10 @@ class SendMessage extends (react__WEBPACK_IMPORTED_MODULE_0___default().PureComp
       this.setState({
         message: msg
       }, _ => {
-        this.messageEditArea.scrollTop = this.messageEditArea.scrollHeight;
-        this.messageEditArea.setSelectionRange(msg.length, msg.length);
+        if (this.messageEditArea) {
+          this.messageEditArea.scrollTop = this.messageEditArea.scrollHeight;
+          this.messageEditArea.setSelectionRange(msg.length, msg.length);
+        }
       });
     }
     if (prevProps.reply != this.props.reply) {