feat: three nuxt frontends, demo seed, rounding + money-exponent + rate-cast fixes, archived specs

2026-09-17 13:34:38 +08:00
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+# frontend-mall Specification
+
+## Purpose
+TBD - created by archiving change frontend-apps. Update Purpose after archive.
+## Requirements
+### Requirement: Localized storefront
+The mall SHALL render UI strings and catalog content in en or zh from one switcher, defaulting to en.
+
+#### Scenario: switch to Chinese
+- **WHEN** a shopper switches locale to zh
+- **THEN** navigation, buttons and product names render in Chinese without reload errors
+
+### Requirement: Multi-currency display
+The mall SHALL offer a currency switcher (enabled currencies from the API) converting SKU prices for display; checkout uses the selected currency.
+
+#### Scenario: switch currency
+- **WHEN** a shopper switches from USD to JPY on a product priced $10.00
+- **THEN** the displayed price reflects the API conversion rate (integer minor units)
+
+### Requirement: Shopping flow
+A shopper SHALL be able to browse, view detail, add to cart, checkout with a shipping address, pay (mock), track shipments, confirm delivery, and request an invoice — all against the live API.
+
+#### Scenario: end-to-end purchase
+- **WHEN** a registered shopper completes checkout on a non-empty cart
+- **THEN** orders appear under Orders and the cart is empty
+