fix: force UTF-8 on console output to avoid GBK encoding errors

Windows Chinese locale defaults stdout to GBK which cannot encode
emoji characters used in log messages. Reconfigure stdout to UTF-8.

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

log_utils.py

@@ -48,7 +48,8 @@ class LoggerManager:
         file_handler.setFormatter(file_formatter)
         _logger.addHandler(file_handler)
 
-        # 控制台处理器
+        # 控制台处理器（强制 UTF-8 避免 GBK 编码错误）
+        sys.stdout.reconfigure(encoding='utf-8', errors='replace')
         console_handler = logging.StreamHandler(sys.stdout)
         console_formatter = logging.Formatter(LOG_FORMAT, DATE_FORMAT)
         console_handler.setFormatter(console_formatter)