## What
Adds the **Guatemalan Quetzal (GTQ)** as a selectable currency, both as
a primary/display currency and as an account currency.
Following `docs/adding-a-currency.md`, this is a config-driven change:
validation, the Inertia dropdown props, and conversion all derive from
the config entry automatically.
## Changes
- `config/currencies.php` — new `GTQ` entry (`allows_primary` +
`allows_account` both `true`)
- `lang/es.json` — Spanish name: `Quetzal guatemalteco` (enforced
locale)
- `lang/fr.json` — French name: `Quetzal guatémaltèque` (optional
locale)
## Compatibility with the conversion system (verified)
- **ISO 4217:** `GTQ` is the current code (not a
deprecated/pre-redenomination code — avoids the GHC-style ×10000 trap).
- **Provider coverage:** `@fawazahmed0/currency-api` serves `gtq` at a
sane rate (`1 GTQ ≈ 0.131 USD` → ~7.6 GTQ/USD).
- **Live conversion (tinker):** `100 GTQ → 13.13 USD` and `100 EUR →
873.19 GTQ` — both directions return real converted amounts, not the
unconverted passthrough.
- **Options + translation:** `CurrencyOptions` returns GTQ in both
`primaryOptions()` and `accountOptions()`, and renders `Quetzal
guatemalteco` under the `es` locale.
## Tests
```
php artisan test --compact tests/Feature/CurrencyConversionServiceTest.php tests/Feature/LocalizationTest.php
# 16 passed
```
Skipped the optional custom symbol in `resources/js/utils/currency.ts` —
`getCurrencySymbol` falls back to the code and `Intl.NumberFormat`
renders its own glyph (GHS skipped it too).
808d41eee2