- Add SessionContext for central state management
- Add TabBar component for session tabs
- Add SplitLayout for side-by-side session viewing
- Add ChatPanel wrapper component
- Refactor ChatInput to uncontrolled input for performance
- Add SCP file transfer for SSH hosts (Mochi)
- Fix stats undefined crash on session restore
- Store host info in sessions for upload routing
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
