Add explicit vault view factories

internal/vaultview/root.go

@@ -5,19 +5,27 @@ import "git.julianfamily.org/keepassgo/internal/vault"
 // HiddenRoot returns the single synthetic top-level vault group that should be
 // treated as an internal storage root rather than as a user-visible group.
 func HiddenRoot(model vault.Model) string {
-	if len(model.EntriesInPath(nil)) != 0 {
+	if !hasGroup(model.Groups, []string{KeepassRoot}) {
 		return ""
 	}
-	groups := model.ChildGroups(nil)
-	roots := make([]string, 0, len(groups))
+	return KeepassRoot
+}
+
+func hasGroup(groups [][]string, path []string) bool {
 	for _, group := range groups {
-		if group == "Recycle Bin" {
+		if len(group) != len(path) {
 			continue
 		}
-		roots = append(roots, group)
+		match := true
+		for i := range group {
+			if group[i] != path[i] {
+				match = false
+				break
+			}
+		}
+		if match {
+			return true
+		}
 	}
-	if len(roots) != 1 {
-		return ""
-	}
-	return roots[0]
+	return false
 }