build apk issue

[nimr77]

running the flutter build apk on the example gives this error

../lib/src/objectdb_storage_indexeddb.dart:7:8: Error: Not found: 'dart:indexed_db'
import 'dart:indexed_db';
       ^
../lib/src/objectdb_storage_indexeddb.dart:8:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

 - package:lipsum

For solutions, see https://dart.dev/go/unsound-null-safety
../lib/src/objectdb_storage_indexeddb.dart:13:14: Error: Type 'Database' not found.
  late final Database _db;
             ^^^^^^^^
../lib/src/objectdb_storage_indexeddb.dart:13:14: Error: 'Database' isn't a type.
  late final Database _db;
             ^^^^^^^^
../lib/src/objectdb_storage_indexeddb.dart:21:7: Error: 'Database' isn't a type.
      Database db = e.target.result;
      ^^^^^^^^
../lib/src/objectdb_storage_indexeddb.dart:20:17: Error: The getter 'window' isn't defined for the class 'IndexedDBStorage'.
 - 'IndexedDBStorage' is from 'package:objectdb/src/objectdb_storage_indexeddb.dart' ('../lib/src/objectdb_storage_indexeddb.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'window'.
    _db = await window.indexedDB!.open(_name, version: 1, onUpgradeNeeded: (e) {
                ^^^^^^
Unhandled exception:
FileSystemException(uri=org-dartlang-untranslatable-uri:dart%3Aindexed_db; message=StandardFileSystem only supports file:* and data:* URIs)
#0      StandardFileSystem.entityForUri (package:front_end/src/api_prototype/standard_file_system.dart:34:7)
#1      asFileUri (package:vm/kernel_front_end.dart:659:37)
#2      writeDepfile (package:vm/kernel_front_end.dart:799:21)
<asynchronous suspension>
#3      FrontendCompiler.compile (package:frontend_server/frontend_server.dart:625:9)
<asynchronous suspension>
#4      starter (package:frontend_server/frontend_server.dart:1451:12)
<asynchronous suspension>
#5      main (file:///b/s/w/ir/x/w/sdk/pkg/frontend_server/bin/frontend_server_starter.dart:10:14)
<asynchronous suspension>



FAILURE: Build failed with an exception.

* Where:
Script '/home/nim.hermony-technology/development/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 1159

* What went wrong:
Execution failed for task ':app:compileFlutterBuildRelease'.
> Process 'command '/home/nim.hermony-technology/development/flutter/bin/flutter'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 20s
Running Gradle task 'assembleRelease'...                           20.9s
Gradle task assembleRelease failed with exit code 1

this is only flutter doctor:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.3.10, on Pop!_OS 22.04 LTS
    6.0.12-76060006-generic, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version
    32.1.0-rc1)
[✓] Chrome - develop for the web
[✓] Linux toolchain - develop for Linux desktop
[!] Android Studio (not installed)
[✓] VS Code (version 1.74.2)
[✓] Connected device (2 available)
[✓] HTTP Host Availability

! Doctor found issues in 1 category.