## Summary
- **Store `invested_amount` in user's currency** (e.g. EUR) instead of
the account's currency (e.g. BTC), since it represents "how much of my
money did I put in" — a concept tied to the user's home currency.
- **Flip `display_invested_amount`** in API responses: now converts from
user currency → account currency (previously account → user), for the
chart's account-currency toggle mode.
- **Remove redundant conversions** in `AccountMetricsService` since
invested amounts are already in user currency after sync.
## Changes
### Backend (5 files)
- **BinanceBalanceSyncService** — convert to
`$account->user->currency_code` instead of `$account->currency_code`
- **BitpandaBalanceSyncService** — same currency target change
- **IndexaCapitalBalanceSyncService** — inject
`CurrencyConversionService`, convert invested amount float to user
currency before storing as cents
- **DashboardAnalyticsController** — flip `display_invested_amount`
conversion direction (user→account) in both monthly and daily endpoints
- **AccountMetricsService** — remove 4 now-redundant invested_amount
conversion spots (values already in user currency)
### Frontend (6 files)
- **update-balance-dialog.tsx** — invested amount input uses user
currency
- **balances-modal.tsx** — invested amount display and edit uses user
currency
- **account-balance-chart.tsx** — currency toggle: user-currency mode
keeps invested_amount as-is; account-currency mode swaps to
`display_invested_amount`
- **import-balances-drawer.tsx** — passes `investedAmountCurrencyCode`
(user currency) to sub-components
- **import-balance-step-mapping.tsx** /
**import-balance-step-preview.tsx** — format invested amounts in user
currency
### Tests (2 files)
- **IndexaCapitalBalanceSyncTest** — use `app()` instead of `new`
(constructor now has DI), pin account currency to USD for deterministic
assertions
- **DashboardAnalyticsTest** — add EUR-based exchange rate, flip
assertion from `/ 0.90` to `* 0.90`
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