feat(balance): detail-account wizard (pivot date) (#215)
feat(balance): assistant detailler un compte agrege (date pivot)
feat(balance): per-security drill-down + latent gain (#216)
feat(balance): drill-down par titre + gain latent (table comptes)
feat(balance): multi-security entry UI + SecurityPicker (#214)
feat(balance): UI saisie multi-titres (SecurityPicker, sous-lignes)
feat(balance): reducer holdings + dispatch account.kind (#213)
feat(balance): refonte editeur — reducer holdings + dispatch account.kind
feat(balance): service securities + save snapshot detaille (holdings)
feat(balance): securities service + detailed snapshot save (#212)
feat(balance): convert priced accounts to detailed (v16) (#211)
feat(balance): conversion des comptes cotes existants (migration v16)
feat(balance): schema & migrations v14/v15 + types (#210)
feat(balance): schema & migrations v14/v15 + types (securities, holdings, account.kind)