initial multi user feature

app/lib/features/user/data/providers.dart

@@ -17,15 +17,16 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
+import 'dart:io';
+
 import 'package:drift/drift.dart';
 import 'package:drift/native.dart';
 import 'package:path/path.dart' as p;
-import 'package:path_provider/path_provider.dart' as path_provider;
 import 'package:riverpod/experimental/persist.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
-import 'package:sqlite3/sqlite3.dart';
 import 'package:sqlite3_flutter_libs/sqlite3_flutter_libs.dart';
-import 'package:universal_io/io.dart';
+
+import 'package:weblibre/core/filesystem.dart';
 import 'package:weblibre/features/user/data/database/database.dart';
 import 'package:weblibre/features/user/data/database/riverpod_storage.dart';
 
@@ -35,23 +36,13 @@ part 'providers.g.dart';
 UserDatabase userDatabase(Ref ref) {
   final db = UserDatabase(
     LazyDatabase(() async {
-      // put the database file, called db.sqlite here, into the documents folder
-      // for your app.
-      final dbFolder = await path_provider.getApplicationDocumentsDirectory();
-      final file = File(p.join(dbFolder.path, 'user.db'));
+      final file = File(p.join(filesystem.profileDatabasesDir.path, 'user.db'));
 
       // Also work around limitations on old Android versions
       if (Platform.isAndroid) {
         await applyWorkaroundToOpenSqlite3OnOldAndroidVersions();
       }
 
-      // Make sqlite3 pick a more suitable location for temporary files - the
-      // one from the system may be inaccessible due to sandboxing.
-      final cachebase = (await path_provider.getTemporaryDirectory()).path;
-      // We can't access /tmp on Android, which sqlite3 would try by default.
-      // Explicitly tell it about the correct temporary directory.
-      sqlite3.tempDirectory = cachebase;
-
       return NativeDatabase.createInBackground(file);
     }),
   );

app/lib/features/user/data/providers.g.dart

@@ -48,7 +48,7 @@ final class UserDatabaseProvider
   }
 }
 
-String _$userDatabaseHash() => r'b925780435806f0241d7ddb635e301e9fc8baf6e';
+String _$userDatabaseHash() => r'8cc40197f9dbb85ccd8263984218753d3690954b';
 
 @ProviderFor(riverpodDatabaseStorage)
 const riverpodDatabaseStorageProvider = RiverpodDatabaseStorageProvider._();