feat(marketing): add user logo management module

Users can now save uploaded logos to the backend (marketing_user_logos table),
avoiding repeated uploads. Includes CRUD endpoints: list, save, delete with
a per-user limit of 10 logos.

Made-with: Cursor

cmd/api/main.go

@@ -82,6 +82,7 @@ func main() {
 		&marketingmodel.MarketingCategory{},
 		&marketingmodel.MarketingTemplate{},
 		&marketingmodel.MarketingDownload{},
+		&marketingmodel.UserLogo{},
 		&quitcheckinmodel.Profile{},
 		&quitcheckinmodel.DailyStatus{},
 		&quitcheckinmodel.RelapseEvent{},
@@ -156,12 +157,15 @@ func main() {
 	categoryRepo := marketingrepo.NewCategoryRepository(database.DB)
 	templateRepo := marketingrepo.NewTemplateRepository(database.DB)
 	downloadRepo := marketingrepo.NewDownloadRepository(database.DB)
+	userLogoRepo := marketingrepo.NewUserLogoRepository(database.DB)
 	categorySvc := marketingservice.NewCategoryService(categoryRepo)
 	templateSvc := marketingservice.NewTemplateService(templateRepo)
 	downloadSvc := marketingservice.NewDownloadService(downloadRepo, templateRepo)
+	userLogoSvc := marketingservice.NewUserLogoService(userLogoRepo)
 	marketingCategoryHandler := marketinghandler.NewCategoryHandler(categorySvc)
 	marketingTemplateHandler := marketinghandler.NewTemplateHandler(templateSvc)
 	marketingDownloadHandler := marketinghandler.NewDownloadHandler(downloadSvc)
+	marketingUserLogoHandler := marketinghandler.NewUserLogoHandler(userLogoSvc)
 
 	adminService := adminmodule.NewService(
 		database.DB,
@@ -194,6 +198,7 @@ func main() {
 		marketingCategoryHandler,
 		marketingTemplateHandler,
 		marketingDownloadHandler,
+		marketingUserLogoHandler,
 		quitCheckinHandler,
 	)