- docs/reference/tui.md: new TUI reference covering launch, layout,
key bindings, input modes, help panel (F1), persona bar, full slash
command catalog (67 commands / 14 groups), persona YAML schema, and
module architecture table
- docs/reference/persona.md: new persona system reference covering
storage layout, YAML schema, validation rules, argument presets,
PersonaRegistry and PersonaState Python APIs, and TUI slash commands
- CHANGELOG.md: add [3.7.0] section summarising TUI, persona system,
session management, server mode, A2A integration, and key fixes
- README.md: extend Highlights with TUI, persona, session, server mode,
and A2A; add TUI quick-start, session management, and server mode
usage examples
