feat(analytics): cashflow view with income/investment/net — split-adjusted + multi-currency
- Add 'investment' category (shares, ETFs, super)
- Analytics API: separate income, investment, expense queries; use amount_aud for FX-aware sums
- Analytics page: cashflow summary (income/expenses/invested/net cash), grouped bar chart,
income + invested rows in 6-month trend table
- MonthlyAnalytics interface: add income, investments, net fields to totals
- DB: amount_aud + exchange_rate_to_aud columns added and backfilled (in prior migration)
siddharthd
d1a0eedf03