fix: 完善聊天解析与导出体验

- 修复引用消息名称和图片布局
- 明确单会话图片测试日志范围
- 支持导出文件附件
- 完善图片批测、会话刷新和安全退出

src/main/message-parser.ts

@@ -590,10 +590,10 @@ function parseQuoteMessage(content: string): {
   if (referMsgStart === -1 || referMsgEnd === -1) return {}
 
   const referMsgXml = content.substring(referMsgStart, referMsgEnd + '</refermsg>'.length)
-  const sender =
-    sanitizeQuotedContent(extractXmlValue(referMsgXml, 'displayname')) ||
-    sanitizeQuotedContent(extractXmlValue(referMsgXml, 'fromusr')) ||
-    undefined
+  const displayName = sanitizeQuotedContent(extractXmlValue(referMsgXml, 'displayname'))
+  const chatUser = sanitizeQuotedSenderId(extractXmlValue(referMsgXml, 'chatusr'))
+  const fromUser = sanitizeQuotedSenderId(extractXmlValue(referMsgXml, 'fromusr'))
+  const sender = displayName || chatUser || fromUser || undefined
   const referContent = extractXmlValue(referMsgXml, 'content')
   const referType = extractXmlValue(referMsgXml, 'type')
 
@@ -653,6 +653,10 @@ function sanitizeQuotedContent(content: string): string {
   return decoded
 }
 
+function sanitizeQuotedSenderId(value: string): string {
+  return decodeXmlEntities(String(value || '')).trim()
+}
+
 function stripChatroomPrefix(content: string): string {
   return String(content || '')
     .replace(/^[0-9a-z_-]+@chatroom:\s*/i, '')