Reuse account sections and group securities with per-account holdings.
Use Mantine Select to preserve filters and reset pagination on scope changes.
Document component reuse guardrails and cover routes, grouping and scope switching.
Add variant="bond" to PositionCard with bond-specific CSS classes
(.bondCard, .bondMain, etc.) matching the stock expanded layout.
PositionSection now passes variant based on section kind.
Bond cards render 3-column grid (logo | identity | value) with
meta row, identical to stock cards.