refactor: general architectural cleanup and bug fixes

internal/auth/module.go

@@ -2,10 +2,13 @@ package auth
 
 import (
 	"mal/internal/auth/handler"
+	"mal/internal/auth/middleware"
 	"mal/internal/auth/repository"
 	"mal/internal/auth/service"
+	"mal/internal/domain"
 	"mal/internal/server"
 
+	"github.com/gin-gonic/gin"
 	"go.uber.org/fx"
 )
 
@@ -14,6 +17,9 @@ var Module = fx.Options(
 		repository.NewAuthRepository,
 		service.NewAuthService,
 		handler.NewAuthHandler,
+		func(svc domain.AuthService) gin.HandlerFunc {
+			return middleware.AuthMiddleware(svc)
+		},
 	),
 	fx.Provide(
 		server.AsRouteRegister(func(h *handler.AuthHandler) server.RouteRegister {