feat: 添加配置加载和重载功能，使用读写锁确保线程安全，并优化错误处理信息

config/config.go

@@ -1,12 +1,18 @@
 package config
 
 import (
+	"fmt"
 	"os"
+	"sync"
 
 	"gopkg.in/yaml.v3"
 )
 
-var ConfigManager = &Config{}
+var (
+	ConfigManager = &Config{}
+	configLock    = &sync.RWMutex{}
+	configLoaded  = false
+)
 
 type Config struct {
 	SteamApiKey      string `yaml:"steam_api_key"`
@@ -26,25 +32,46 @@ type Config struct {
 	} `yaml:"web_server"`
 }
 
+// LoadConfig 从指定路径加载配置文件
 func (cm *Config) LoadConfig(path string) error {
+	configLock.Lock()
+	defer configLock.Unlock()
+
 	data, err := os.ReadFile(path)
 	if err != nil {
-		return err
+		return fmt.Errorf("读取配置文件失败: %w", err)
 	}
 
-	err = yaml.Unmarshal(data, &cm)
+	err = yaml.Unmarshal(data, cm)
 	if err != nil {
-		return err
+		return fmt.Errorf("解析配置文件失败: %w", err)
 	}
+
+	configLoaded = true
 	return nil
 }
 
+// GetConfig 获取配置实例，如果未加载则尝试从默认路径加载
 func (cm *Config) GetConfig() *Config {
-	if cm == nil {
+	configLock.RLock()
+	if configLoaded {
+		configLock.RUnlock()
+		return cm
+	}
+	configLock.RUnlock()
+
+	// 如果当前实例是ConfigManager但配置尚未加载，尝试加载
+	if cm == ConfigManager {
 		err := ConfigManager.LoadConfig("config.yml")
 		if err != nil {
-			panic(err)
+			panic(fmt.Errorf("加载默认配置失败: %w", err))
 		}
 	}
+
 	return cm
 }
+
+// ReloadConfig 重新加载配置
+func ReloadConfig(path string) error {
+	return ConfigManager.LoadConfig(path)
+}