• fix(sync): allow past recurrence end dates during deserialization (#220) by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/225
• fix(settings): enhance import data version compatibility with semantic versioning by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/226
• fix: implement notification channels on android and refactor interface by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/229
• fix(tags): add tag creation in select dialog by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/230
• feat(about): enhance onboarding tour completion with polished dialog and correct navigation by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/234
• feat(ui): add skip quick add setting and enhance task creation flow by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/235
• feat(tasks): enhance CSV import with tag support and Todoist format by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/236
• fix(tasks): support string priorities and flexible date formats in CSV import by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/237
• fix: add Asian font fallbacks to theme configuration by @ahmet-cetinkaya in https://github.com/ahmet-cetinkaya/whph/pull/238

Full Changelog: https://github.com/ahmet-cetinkaya/whph/compare/v0.20.4...v0.21.0