完善服务端材质渲染（未测试），删除profile表中不必要的isActive字段及相关接口

internal/types/common.go

@@ -35,7 +35,7 @@ type RegisterRequest struct {
 	Username         string `json:"username" binding:"required,min=3,max=50" example:"newuser"`
 	Email            string `json:"email" binding:"required,email" example:"user@example.com"`
 	Password         string `json:"password" binding:"required,min=6,max=128" example:"password123"`
-	VerificationCode string `json:"verification_code" binding:"required,len=6" example:"123456"` // 邮箱验证码
+	VerificationCode string `json:"verification_code" binding:"required,len=6" example:"123456"`                                   // 邮箱验证码
 	Avatar           string `json:"avatar" binding:"omitempty,url" example:"https://rustfs.example.com/avatars/user_1/avatar.png"` // 可选，用户自定义头像
 }
 
@@ -158,7 +158,6 @@ type ProfileInfo struct {
 	Name       string     `json:"name" example:"PlayerName"`
 	SkinID     *int64     `json:"skin_id,omitempty" example:"1"`
 	CapeID     *int64     `json:"cape_id,omitempty" example:"2"`
-	IsActive   bool       `json:"is_active" example:"true"`
 	LastUsedAt *time.Time `json:"last_used_at,omitempty" example:"2025-10-01T12:00:00Z"`
 	CreatedAt  time.Time  `json:"created_at" example:"2025-10-01T10:00:00Z"`
 	UpdatedAt  time.Time  `json:"updated_at" example:"2025-10-01T10:00:00Z"`
@@ -212,4 +211,13 @@ type SystemConfigResponse struct {
 	RegistrationEnabled bool   `json:"registration_enabled" example:"true"`
 	MaxTexturesPerUser  int    `json:"max_textures_per_user" example:"100"`
 	MaxProfilesPerUser  int    `json:"max_profiles_per_user" example:"5"`
-}
+}
+
+// RenderResponse 材质渲染响应
+type RenderResponse struct {
+	URL          string     `json:"url" example:"https://rustfs.example.com/renders/xxx.png"`
+	ContentType  string     `json:"content_type" example:"image/png"`
+	ETag         string     `json:"etag,omitempty" example:"abc123def456"`
+	Size         int64      `json:"size" example:"2048"`
+	LastModified *time.Time `json:"last_modified,omitempty" example:"2025-10-01T12:00:00Z"`
+}