feat(integrations): expose oauth callbacks

internal/handler/api/v1/shopify_integration_handler.go

@@ -36,7 +36,7 @@ func (h *ShopifyIntegrationHandler) Delete(c *gin.Context) {
 	response.OK(c, gin.H{"message": "Shopify integration deleted"})
 }
 
-// Auth creates/updates Shopify OAuth credentials.
+// Auth returns the Shopify OAuth authorize URL.
 // POST /api/v1/accounts/:account_id/integrations/shopify/auth
 func (h *ShopifyIntegrationHandler) Auth(c *gin.Context) {
 	accountID, err := parseUintParam(c, "account_id")
@@ -51,12 +51,12 @@ func (h *ShopifyIntegrationHandler) Auth(c *gin.Context) {
 		return
 	}
 
-	hook, svcErr := h.svc.Auth(c.Request.Context(), accountID, req)
+	redirect, svcErr := h.svc.BuildAuthRedirect(c.Request.Context(), accountID, req)
 	if svcErr != nil {
 		handleServiceError(c, svcErr)
 		return
 	}
-	response.OK(c, hook)
+	response.OK(c, redirect)
 }
 
 // GetOrders retrieves Shopify orders for an account.