feat: scaffold Antonym fashion store

Anonymous Bitcoin-only fashion e-commerce with:
- Vue 3 + Tailwind 4 frontend with glassmorphism dark/light design system
- Express 5 + SQLite backend with BTCPay Server integration
- Nostr identity (NIP-07/keypair) for anonymous purchase tracking
- ChaCha20-Poly1305 encrypted shipping addresses
- Admin panel with order/product/stock management
- SVG logo splash animation with clip-path reveal
- 5 seeded products across 4 categories

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

shared/types.ts

@@ -0,0 +1,96 @@
+export interface Product {
+  id: string
+  name: string
+  slug: string
+  description: string
+  priceSats: number
+  images: string[]
+  sizes: SizeStock[]
+  category: string
+  isActive: boolean
+  createdAt: string
+  updatedAt: string
+}
+
+export interface SizeStock {
+  size: string
+  stock: number
+}
+
+export type OrderStatus =
+  | 'pending'
+  | 'paid'
+  | 'confirmed'
+  | 'shipped'
+  | 'delivered'
+  | 'cancelled'
+
+export interface Order {
+  id: string
+  nostrPubkey: string | null
+  email: string | null
+  btcpayInvoiceId: string | null
+  status: OrderStatus
+  items: OrderItem[]
+  totalSats: number
+  note: string | null
+  createdAt: string
+  updatedAt: string
+}
+
+export interface OrderItem {
+  productId: string
+  productName: string
+  size: string
+  quantity: number
+  priceSats: number
+}
+
+export interface OrderEvent {
+  id: number
+  orderId: string
+  status: OrderStatus
+  note: string | null
+  createdAt: string
+}
+
+export interface CartItem {
+  productId: string
+  slug: string
+  name: string
+  size: string
+  quantity: number
+  priceSats: number
+  image: string
+}
+
+export interface CreateOrderRequest {
+  items: { productId: string; size: string; quantity: number }[]
+  shippingAddress: ShippingAddress
+  email?: string
+  nostrPubkey?: string
+  note?: string
+}
+
+export interface ShippingAddress {
+  name: string
+  line1: string
+  line2?: string
+  city: string
+  state?: string
+  postalCode: string
+  country: string
+}
+
+export interface CreateOrderResponse {
+  orderId: string
+  invoiceUrl: string
+  invoiceId: string
+}
+
+export interface ApiError {
+  error: {
+    code: string
+    message: string
+  }
+}