- Implement MailRootView with navigation and sidebar for mail management.
- Create MailSidebarView, ThreadListView, and ThreadDetailView for displaying mail content.
- Introduce ComposeView for composing new messages.
- Add MailTheme for consistent styling across mail components.
- Implement adaptive layouts for iOS and macOS.
- Create unit tests for AppNavigationCommand and AppViewModel to ensure correct functionality.
- Implement MailRootView with sidebar, thread list, and detail views.
- Create MailSidebarView for mailbox navigation and filters.
- Add ThreadListView and ThreadDetailView for displaying threads and messages.
- Introduce ComposeView for composing new emails.
- Implement adaptive UI for different platforms (iOS/macOS).
- Add MailTheme for consistent styling across components.
- Create unit tests for AppNavigationCommand and AppViewModel to ensure functionality.