Introduces the first versions of client and staff mobile application prototypes, including platform-specific assets, screens, and configuration for Android, iOS, macOS, Linux, and Windows. Adds documentation, AI prompt guides, and a new staff payments feature module with repository, use cases, and presentation logic. Also includes generated localization files and supporting resources for both client and staff apps.
Introduces the client billing feature with domain, data, and presentation layers. Adds billing BLoC, navigation, UI widgets, and integrates with mock financial repository. Updates localization files for billing-related strings, adds new icons and typography, and registers url_launcher plugins for Linux, macOS, and Windows platforms.
Relocated all app directories (client, design_system_viewer, staff) and their contents under the new 'apps/mobile' path. This change improves project organization and prepares for future platform-specific structuring.
