修复数字解析错误

electron/services/chatService.ts

@@ -2227,7 +2227,9 @@ class ChatService {
       if (raw.length === 0) return ''
 
       // 检查是否是 hex 编码
-      if (this.looksLikeHex(raw)) {
+      // 只有当字符串足够长（超过16字符）且看起来像 hex 时才尝试解码
+      // 短字符串（如 "123456" 等纯数字）容易被误判为 hex
+      if (raw.length > 16 && this.looksLikeHex(raw)) {
         const bytes = Buffer.from(raw, 'hex')
         if (bytes.length > 0) {
           const result = this.decodeBinaryContent(bytes, raw)