Local work on the social.io handoff before merging the claude
worktree branch. Includes the full per-spec Sources/Core/Design
module (8 files), watchOS target under WatchApp/, Live Activity +
widget extension, entitlements, scheme, and asset catalog.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- 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.
