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

2026-09-17 13:34:38 +08:00
parent dc9fd31c5e
commit 653f13161a
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+# order Specification
+
+## Purpose
+TBD - created by archiving change cart-checkout-orders. Update Purpose after archive.
+## Requirements
+### Requirement: Checkout splits by shop
+`POST /api/orders/checkout` SHALL create one order per distinct shop in the cart, in a single database transaction: stock decrement, order + item insert with price snapshots, cart clear. All amounts use the cart's SKU currencies converted into the buyer-chosen display currency at checkout time.
+
+#### Scenario: two shops → two orders
+- **WHEN** the cart contains SKUs from shops A and B
+- **THEN** two orders are created, each with only its shop's items, and the cart is empty
+
+#### Scenario: insufficient stock
+- **WHEN** any line's qty exceeds SKU stock
+- **THEN** the whole checkout returns 409 and no order is created and stock is unchanged
+
+### Requirement: Order lifecycle
+Status transitions SHALL be: pending_payment → paid → fulfilling → shipped → completed; cancellable only from pending_payment, which MUST restore stock.
+
+#### Scenario: cancel restores stock
+- **WHEN** a customer cancels a pending_payment order
+- **THEN** stock of each SKU increases by the ordered qty and status is cancelled
+
+#### Scenario: illegal transition rejected
+- **WHEN** cancelling a paid order via the customer endpoint
+- **THEN** the API returns 409
+
+### Requirement: Order ownership
+Customers SHALL see only their own orders; shop roles only their shop's orders; platform_admin sees all.
+
+#### Scenario: cross-customer read denied
+- **WHEN** customer X requests customer Y's order id
+- **THEN** the API returns 404
+