feat: Service层接口化

新增Service接口定义（internal/service/interfaces.go）:
- UserService: 用户认证、查询、更新等接口
- ProfileService: 档案CRUD、状态管理接口
- TextureService: 材质管理、收藏功能接口
- TokenService: 令牌生命周期管理接口
- VerificationService: 验证码服务接口
- CaptchaService: 滑动验证码接口
- UploadService: 上传服务接口
- YggdrasilService: Yggdrasil API接口

新增Service实现:
- user_service_impl.go: 用户服务实现
- profile_service_impl.go: 档案服务实现
- texture_service_impl.go: 材质服务实现
- token_service_impl.go: 令牌服务实现

更新Container:
- 添加Service层字段
- 初始化Service实例
- 添加With*Service选项函数

遵循Go最佳实践:
- 接口定义与实现分离
- 依赖通过构造函数注入
- 便于单元测试mock

internal/container/container.go

@@ -2,6 +2,7 @@ package container
 
 import (
 	"carrotskin/internal/repository"
+	"carrotskin/internal/service"
 	"carrotskin/pkg/auth"
 	"carrotskin/pkg/redis"
 	"carrotskin/pkg/storage"
@@ -26,6 +27,12 @@ type Container struct {
 	TextureRepo repository.TextureRepository
 	TokenRepo   repository.TokenRepository
 	ConfigRepo  repository.SystemConfigRepository
+
+	// Service层
+	UserService    service.UserService
+	ProfileService service.ProfileService
+	TextureService service.TextureService
+	TokenService   service.TokenService
 }
 
 // NewContainer 创建依赖容器
@@ -51,6 +58,12 @@ func NewContainer(
 	c.TokenRepo = repository.NewTokenRepository(db)
 	c.ConfigRepo = repository.NewSystemConfigRepository(db)
 
+	// 初始化Service
+	c.UserService = service.NewUserService(c.UserRepo, c.ConfigRepo, jwtService, redisClient, logger)
+	c.ProfileService = service.NewProfileService(c.ProfileRepo, c.UserRepo, logger)
+	c.TextureService = service.NewTextureService(c.TextureRepo, c.UserRepo, logger)
+	c.TokenService = service.NewTokenService(c.TokenRepo, c.ProfileRepo, logger)
+
 	return c
 }
 
@@ -135,3 +148,31 @@ func WithConfigRepo(repo repository.SystemConfigRepository) Option {
 		c.ConfigRepo = repo
 	}
 }
+
+// WithUserService 设置用户服务
+func WithUserService(svc service.UserService) Option {
+	return func(c *Container) {
+		c.UserService = svc
+	}
+}
+
+// WithProfileService 设置档案服务
+func WithProfileService(svc service.ProfileService) Option {
+	return func(c *Container) {
+		c.ProfileService = svc
+	}
+}
+
+// WithTextureService 设置材质服务
+func WithTextureService(svc service.TextureService) Option {
+	return func(c *Container) {
+		c.TextureService = svc
+	}
+}
+
+// WithTokenService 设置令牌服务
+func WithTokenService(svc service.TokenService) Option {
+	return func(c *Container) {
+		c.TokenService = svc
+	}
+}