feat: more role backend and admin/writer roles additions and adjustments

internal/infrastructure/useCases/authorSupport.go

@@ -4,6 +4,7 @@ import (
 	"RenewCMS/internal/domain/audit"
 	"RenewCMS/internal/domain/author"
 	"RenewCMS/internal/domain/image"
+	"RenewCMS/internal/domain/role"
 	"RenewCMS/internal/domain/user"
 	"errors"
 	"strconv"
@@ -14,15 +15,11 @@ const authorChangeSeparator = ", "
 
 type AuthorCaller struct {
 	UserID uint32
-	Role   user.Role
+	Grants role.GrantSet
 }
 
-func isAdminRole(role user.Role) bool {
-	return role == user.RoleOwner || role == user.RoleAdmin
-}
-
-func (c AuthorCaller) isAdmin() bool {
-	return isAdminRole(c.Role)
+func (c AuthorCaller) seesUserEmail() bool {
+	return c.Grants.Holds(role.KeyUsersView)
 }
 
 func authorTarget(a author.Author) audit.Target {