feat(auth): 完整认证系统 — 注册/登录/JWT/路由（Task 4 + Task 5）

Task 4 — 认证服务层：
- pkg/utils/password.go: bcrypt 密码加密与校验
- pkg/utils/jwt.go: Access/Refresh Token 生成与解析（jwt/v5@v5.2.1，兼容 Go 1.23）
- app/dto/auth_dto.go: 认证相关请求/响应 DTO（含参数校验 binding tag）
- app/auth/service/auth_service.go: 核心业务逻辑（注册、登录、管理员登录、Token 刷新、个人信息、改密码）
- pkg/middleware/auth.go: JWT 认证中间件 + 角色权限检查中间件

Task 5 — Controller 与路由注册：
- app/auth/controller/auth_controller.go: 前台认证接口（7 个 API）
- app/auth/controller/admin_auth_controller.go: 后台管理认证接口
- app/auth/router.go: auth 模块路由定义（模块自包含）
- router/router.go: 主路由汇总入口（仅做调度，不含具体路由定义）
- cmd/server/main.go: 路由注册迁移到 router.Setup()

已验证全部接口：注册 ✓ 登录 ✓ 获取 profile ✓ 错误密码 ✓ 未认证拒绝 ✓ 非管理员拒绝 ✓

Made-with: Cursor

backend/go-service/app/provider/provider.go

@@ -3,6 +3,8 @@
 package provider
 
 import (
+	"github.com/echochat/backend/app/auth/controller"
+	"github.com/echochat/backend/app/auth/service"
 	"github.com/echochat/backend/config"
 	"github.com/echochat/backend/pkg/db"
 	"github.com/google/wire"
@@ -10,19 +12,32 @@ import (
 	"gorm.io/gorm"
 )
 
-// App 应用根容器，持有所有基础设施组件
+// App 应用根容器，持有基础设施组件和各模块的 Controller/Service
 type App struct {
-	Config *config.Config
-	DB     *gorm.DB
-	Redis  *redis.Client
+	Config             *config.Config
+	DB                 *gorm.DB
+	Redis              *redis.Client
+	AuthService        *service.AuthService              // Auth 认证服务
+	AuthController     *controller.AuthController        // 前台认证控制器
+	AdminAuthController *controller.AdminAuthController  // 后台认证控制器
 }
 
 // NewApp 创建应用实例
-func NewApp(cfg *config.Config, gormDB *gorm.DB, redisClient *redis.Client) *App {
+func NewApp(
+	cfg *config.Config,
+	gormDB *gorm.DB,
+	redisClient *redis.Client,
+	authService *service.AuthService,
+	authCtrl *controller.AuthController,
+	adminAuthCtrl *controller.AdminAuthController,
+) *App {
 	return &App{
-		Config: cfg,
-		DB:     gormDB,
-		Redis:  redisClient,
+		Config:             cfg,
+		DB:                 gormDB,
+		Redis:              redisClient,
+		AuthService:        authService,
+		AuthController:     authCtrl,
+		AdminAuthController: adminAuthCtrl,
 	}
 }
 
@@ -36,10 +51,16 @@ func provideRedisConfig(cfg *config.Config) *config.RedisConfig {
 	return &cfg.Redis
 }
 
+// provideJWTConfig 从全局 Config 中提取 JWTConfig
+func provideJWTConfig(cfg *config.Config) *config.JWTConfig {
+	return &cfg.JWT
+}
+
 // InfraSet 基础设施层 Provider Set
 var InfraSet = wire.NewSet(
 	provideDBConfig,
 	provideRedisConfig,
+	provideJWTConfig,
 	db.NewPostgres,
 	db.NewRedis,
 	NewApp,

backend/go-service/app/provider/wire.go

@@ -4,6 +4,7 @@
 package provider
 
 import (
+	"github.com/echochat/backend/app/auth"
 	"github.com/echochat/backend/config"
 	"github.com/google/wire"
 )
@@ -12,6 +13,7 @@ import (
 func InitializeApp(cfg *config.Config) (*App, error) {
 	wire.Build(
 		InfraSet,
+		auth.AuthSet,
 	)
 	return nil, nil
 }

backend/go-service/app/provider/wire_gen.go

@@ -7,6 +7,9 @@
 package provider
 
 import (
+	"github.com/echochat/backend/app/auth/controller"
+	"github.com/echochat/backend/app/auth/dao"
+	"github.com/echochat/backend/app/auth/service"
 	"github.com/echochat/backend/config"
 	"github.com/echochat/backend/pkg/db"
 )
@@ -25,6 +28,12 @@ func InitializeApp(cfg *config.Config) (*App, error) {
 	if err != nil {
 		return nil, err
 	}
-	app := NewApp(cfg, gormDB, client)
+	userDAO := dao.NewUserDAO(gormDB)
+	roleDAO := dao.NewRoleDAO(gormDB)
+	jwtConfig := provideJWTConfig(cfg)
+	authService := service.NewAuthService(userDAO, roleDAO, jwtConfig)
+	authController := controller.NewAuthController(authService)
+	adminAuthController := controller.NewAdminAuthController(authService)
+	app := NewApp(cfg, gormDB, client, authService, authController, adminAuthController)
 	return app, nil
 }