- 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
- Wire MessageStore into the in-process executor runtime and project engine
- Forward MessageStore events through dashboard SSE infrastructure for mailbox updates
- Close mailbox pipeline gaps across API routes, server wiring, and mailbox UI components
- Add regression coverage for messaging routes, SSE forwarding, and agent tool behavior
- Document the MessageStore SSE wiring pattern in .fusion/memory.md
- Add role=dialog and aria-modal attributes to all modal dialogs for accessibility
- Standardize close button aria-labels across all modals
- Unify overlay backdrop-filter, z-index, and background styles in styles.css
- Add light theme overrides for non-standard overlay backgrounds
- Update AgentListModal tests to reflect new aria attributes
- Add changeset for @gsxdsm/fusion package
- Add compose button to Agents tab for composing messages to agents
- Compose pre-fills recipient when agent is selected, shows dropdown otherwise
- After send, user stays on Agents tab and selected agent is preserved
- Add 4 regression tests for new compose contract
- Add CSS for mailbox-agents-header layout
