- Split agent mailbox responses into inbox and outbox arrays while keeping messages as an inbox alias
- Add Inbox/Outbox sub-tabs in MailboxView and MailboxModal with unread badge and agent-switch reset behavior
- Render tab-specific empty states and sent-message metadata in the outbox list
- Add dashboard styles and mobile overrides for agent mailbox sub-tabs
- Expand MailboxModal and MailboxView tests to cover sub-tab visibility, switching, reset, and unread badge behavior
- Add .mailbox-view base styles for full-page layout with flexbox and inset edges
- Add mobile responsive styles for .mailbox-view within 768px breakpoint
- Add MailboxView component test covering layout rendering and mobile behavior
- Load agents on mount for compose from any MailboxView tab
- Add .mailbox-view base styles for full-page layout
- Add .mailbox-view mobile overrides with safe-area-inset handling
- Add MailboxView test coverage for compose from inbox with agents
- Add MailboxView as a full-page navigation view replacing the modal-based approach
- Migrate MessageStore from filesystem to SQLite backend for message persistence
- Implement conversation grouping for inbox display with unread badge state
- Remove modal plumbing (useModalManager, AppModals exports) and simplify App.tsx
- Add evictStaleProcessing() to TriageProcessor for self-healing hung triage sessions
- Add comprehensive MailboxView tests and Header mailbox tests
- Update README documentation with MailboxView features
- Add CSS styles for MailboxView component
- Fix MobileNavBar tests for mailbox tab visibility
