- Updated various package versions in `Directory.Packages.props` to the latest compatible releases, enhancing overall stability and security.
- Modified test assertions in `GrantBillingGiftCommandHandlerTests`, `RejectPaymentRequestCommandHandlerTests`, `BlockUserCommandHandlerTests`, and `DeleteUserCommandHandlerTests` to use null-safe checks, ensuring robustness against potential null reference exceptions.
- Updated PostgreSqlContainer initialization in `PnvPanelWebApplicationFactory` for improved clarity and maintainability.
- Added new endpoints for creating and managing extension requests, allowing users to request billing period extensions.
- Implemented admin approval processes for extension requests via Telegram, including inline buttons for approval and rejection.
- Introduced a gifting feature for admins to grant additional billing days directly to users without a request.
- Updated the support ticket model to accommodate extension requests and their associated properties.
- Enhanced the Telegram notifier to inform admins of new extension requests and notify users of approval or rejection.
- Updated frontend components to support the new extension request and gifting functionalities, including user interfaces for managing these features.
- Revised API documentation to reflect the new endpoints and their usage in the billing context.