fix(transfer): support default tree-schema databases

Closes #7104

apps/desktop/src/lib/database/dataTransferSelection.ts

@@ -1,5 +1,6 @@
 import { isInternalDorisCatalog } from "@/lib/database/databaseFeatureSupport";
-import type { CatalogInfo } from "@/types/database";
+import { decodeSelectableDatabaseValue, encodeSelectableDatabaseValue } from "@/lib/database/defaultDatabase";
+import type { CatalogInfo, DatabaseType } from "@/types/database";
 
 export interface TransferDatabaseSelection {
   connectionId: string;
@@ -8,6 +9,18 @@ export interface TransferDatabaseSelection {
   database: string;
 }
 
+export function encodeTransferDatabaseOptions(databaseType: DatabaseType | undefined, databases: readonly string[]): string[] {
+  return databases.map((database) => encodeSelectableDatabaseValue(databaseType, database));
+}
+
+export function decodeTransferDatabaseOption(databaseType: DatabaseType | undefined, option: string): string {
+  return decodeSelectableDatabaseValue(databaseType, option);
+}
+
+export function isTransferDatabaseSelected(option: string): boolean {
+  return option.length > 0;
+}
+
 export function normalizeTransferCatalog(catalog: string, catalogs: readonly CatalogInfo[]): string {
   const normalizedCatalog = catalog.trim();
   if (!normalizedCatalog) return "";