## What
Adds the **Danish Krone (DKK)** as both a user primary currency and an
account currency.
Per `docs/adding-a-currency.md` this is a config change — validation
(`ProfileUpdateRequest`, `StoreAccountRequest`, `UpdateAccountRequest`),
the Inertia dropdown props and conversion all derive from
`config/currencies.php`.
Both pre-checks in the doc pass:
- `DKK` is the current ISO 4217 code (no deprecated-code trap like
`GHC`/`GHS`).
- The provider covers it: `EUR→DKK = 7.4754`, consistent with the ERM II
peg (~7.46).
## Closing the translation gap
Currency names are translated in PHP by `CurrencyOptions`, so they never
appear as literal `__()` keys in the TS/TSX source — `LocalizationTest`
never saw them, and a missing Spanish name silently shipped the English
one. The doc even warned about it.
`LocalizationTest` now feeds the configured currency names into its
translatable-key check, so Spanish is enforced and French warns, exactly
like every other key. That surfaced pre-existing gaps, now filled:
- Spanish: PKR, BRL, DOP, SAR
- French: those four plus NGN
## Also
Dropped the docs' "add a symbol" step. `getCurrencySymbol` has no
callers left — every consumer of `utils/currency` imports
`formatCurrency` only — so entries in its map change nothing on screen.
Removing the function itself is a separate cleanup.
## QA
Real browser QA against the running app, in Spanish:
- `DKK - Corona danesa` appears in the profile currency select; saving
persists `users.currency_code = 'DKK'` and survives a reload.
- `DKK - Corona danesa` appears in the create-account currency select;
created a `Danske Bank Private` account and confirmed
`accounts.currency_code = 'DKK'`.
- Conversion both ways: `100 EUR → 747.68 DKK`, `100 DKK → 13.38 EUR`.
- `LocalizationTest` + `CurrencyConversionServiceTest` green; `pint`,
`phpstan`, `prettier`, `eslint` clean.
## Demo
<!-- PLACEHOLDER: drag the video here -->
**⬆️ Attach `~/Downloads/dkk-currency-qa.mp4` here.**
## Follow-up (out of scope)
Prod already holds accounts and users on currencies that aren't in the
config (PLN, MAD, PHP).
`AccountUserCurrencyService::resolveImportedCurrency` accepts whatever a
bank reports and `forceFill`s it onto `users.currency_code`, bypassing
validation — so those users can't save **any** profile change, and their
currency select renders empty. Worth a separate issue: either
validate/fall back on import, or make the selects tolerate an
out-of-list current value.
## Summary
Adds `docs/adding-a-currency.md`, mirroring
`docs/adding-a-banking-provider.md` but for currencies. Distilled from
the NGN (#642) and GHS (#644) additions.
The gist: adding a currency is a config change, not a feature.
- **Required**: one entry in `config/currencies.php`. Validation (Form
Requests), the Inertia dropdown props, and conversion all auto-derive
from it via `CurrencyOptions` / `CurrencyConversionService`.
- **Translation**: add the name to `lang/es.json` (enforced),
`lang/fr.json` optional. Flagged that `LocalizationTest` won't
auto-catch a missing one, since the name is translated in PHP, not
scanned from TS source.
- **Optional**: a custom short symbol in
`resources/js/utils/currency.ts`.
- **Two gotchas**: use the current ISO 4217 code (the GHC→GHS lesson
from #644), and verify the provider covers the code at the right rate
via the CDN URL.
## Testing
Docs-only change; no code touched.
Víctor Falcón