fix : error nil pointer endpoint access menu

internal/domain/access/response.go

@@ -17,21 +17,33 @@ type AvailableMenuResponse struct {
 
 func MapMenuModelToResponse(pages []RolePageModel) []AvailableMenuResponse {
 	pageMap := make(map[string]*AvailableMenuChildResponse)
+	childrenMap := make(map[string][]*AvailableMenuChildResponse)
 
 	var result []AvailableMenuResponse
 
+	// First pass: create all menu items
 	for _, p := range pages {
 		pageMap[p.ID] = &AvailableMenuChildResponse{
 			Title: p.Name,
 			Icon:  p.Icon.String,
 			To:    p.Url.String,
 		}
+	}
 
+	// Second pass: build parent-child relationships
+	for _, p := range pages {
 		if p.ParentId.String != "" {
-			pageMap[p.ParentId.String].Children = append(pageMap[p.ParentId.String].Children, pageMap[p.ID])
+			// Check if parent exists before adding child
+			if parent, exists := pageMap[p.ParentId.String]; exists {
+				parent.Children = append(parent.Children, pageMap[p.ID])
+			}
+		} else {
+			// Track root items
+			childrenMap[p.ID] = pageMap[p.ID].Children
 		}
 	}
 
+	// Third pass: build result with root items only
 	for _, p := range pages {
 		if p.ParentId.String == "" {
 			result = append(result, AvailableMenuResponse{