* refactor(tui): port to charm v2
bumped bubbletea, lipgloss, bubbles, wish, and huh to v2. Mostly
mechanical chur, new import paths, vewport getter/setter api, view()
returns tea.view now, huh.theme became an interface so the theme package
needed a small reshape. Render plumbing is gone (no more lipgloss.Render
field on the Model or MakeRenderer in main.go). All pages still work
over ssh. setting up for the refund composer next
* style(tui): gofmt main.go and menu.go
replacing duplicated border/selection logic in
account_orders.go and cart.go. Also fixes a latent SSH rendering bug
in cart.go where lipgloss.NewStyle() was used instead of theme.Base().
