统一文件上传方式为直接上传，更新环境变量示例

pkg/config/config.go

@@ -21,7 +21,6 @@ type Config struct {
 	JWT         JWTConfig      `mapstructure:"jwt"`
 	Casbin      CasbinConfig   `mapstructure:"casbin"`
 	Log         LogConfig      `mapstructure:"log"`
-	Upload      UploadConfig   `mapstructure:"upload"`
 	Email       EmailConfig    `mapstructure:"email"`
 	Security    SecurityConfig `mapstructure:"security"`
 }
@@ -99,14 +98,6 @@ type LogConfig struct {
 	Compress   bool   `mapstructure:"compress"`
 }
 
-// UploadConfig 文件上传配置
-type UploadConfig struct {
-	MaxSize        int64    `mapstructure:"max_size"`
-	AllowedTypes   []string `mapstructure:"allowed_types"`
-	TextureMaxSize int64    `mapstructure:"texture_max_size"`
-	AvatarMaxSize  int64    `mapstructure:"avatar_max_size"`
-}
-
 // EmailConfig 邮件配置
 type EmailConfig struct {
 	Enabled  bool   `mapstructure:"enabled"`
@@ -203,12 +194,6 @@ func setDefaults() {
 	viper.SetDefault("log.max_age", 28)
 	viper.SetDefault("log.compress", true)
 
-	// 文件上传默认配置
-	viper.SetDefault("upload.max_size", 10485760)
-	viper.SetDefault("upload.texture_max_size", 2097152)
-	viper.SetDefault("upload.avatar_max_size", 1048576)
-	viper.SetDefault("upload.allowed_types", []string{"image/png", "image/jpeg"})
-
 	// 邮件默认配置
 	viper.SetDefault("email.enabled", false)
 	viper.SetDefault("email.smtp_port", 587)
@@ -370,25 +355,6 @@ func overrideFromEnv(config *Config) {
 		}
 	}
 
-	// 处理文件上传配置
-	if maxSize := os.Getenv("UPLOAD_MAX_SIZE"); maxSize != "" {
-		if val, err := strconv.ParseInt(maxSize, 10, 64); err == nil {
-			config.Upload.MaxSize = val
-		}
-	}
-
-	if textureMaxSize := os.Getenv("UPLOAD_TEXTURE_MAX_SIZE"); textureMaxSize != "" {
-		if val, err := strconv.ParseInt(textureMaxSize, 10, 64); err == nil {
-			config.Upload.TextureMaxSize = val
-		}
-	}
-
-	if avatarMaxSize := os.Getenv("UPLOAD_AVATAR_MAX_SIZE"); avatarMaxSize != "" {
-		if val, err := strconv.ParseInt(avatarMaxSize, 10, 64); err == nil {
-			config.Upload.AvatarMaxSize = val
-		}
-	}
-
 	// 处理邮件配置
 	if emailEnabled := os.Getenv("EMAIL_ENABLED"); emailEnabled != "" {
 		config.Email.Enabled = emailEnabled == "true" || emailEnabled == "True" || emailEnabled == "TRUE" || emailEnabled == "1"