The admin read-only Investor View built capital-account responses
without exited_on, so an exited position showed the active card with
$0s (the LP's own portal was correct). Extracted exit_dates() into
capital_account_router and stamp it in investor_view too; regression
test added. A fund card where every position is exited now renders
greyed (bg + title) so it reads as closed at a glance.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
