refactor: standardize code comments

logger/config.go

@@ -1,11 +1,11 @@
 package logger
 
-// Config 日志配置（简化版）
+// Config is the logger configuration (simplified version)
 type Config struct {
-	Level string `json:"level"` // 日志级别: debug, info, warn, error (默认: info)
+	Level string `json:"level"` // Log level: debug, info, warn, error (default: info)
 }
 
-// SetDefaults 设置默认值
+// SetDefaults sets default values
 func (c *Config) SetDefaults() {
 	if c.Level == "" {
 		c.Level = "info"