refactor: move vault package to app directory

app/vault/internal/pages/wallet/model.go

@@ -0,0 +1,43 @@
+package wallet
+
+// Payment types
+type PaymentMethodData struct {
+	SupportedMethods string         `json:"supportedMethods"`
+	Data             map[string]any `json:"data,omitempty"`
+}
+
+type PaymentItem struct {
+	Label  string `json:"label"`
+	Amount Money  `json:"amount"`
+}
+
+type Money struct {
+	Currency string `json:"currency"`
+	Value    string `json:"value"` // Decimal as string for precision
+}
+
+type PaymentOptions struct {
+	RequestPayerName  bool `json:"requestPayerName,omitempty"`
+	RequestPayerEmail bool `json:"requestPayerEmail,omitempty"`
+	RequestPayerPhone bool `json:"requestPayerPhone,omitempty"`
+	RequestShipping   bool `json:"requestShipping,omitempty"`
+}
+
+type PaymentDetails struct {
+	Total           PaymentItem      `json:"total"`
+	DisplayItems    []PaymentItem    `json:"displayItems,omitempty"`
+	ShippingOptions []ShippingOption `json:"shippingOptions,omitempty"`
+}
+
+type ShippingOption struct {
+	ID       string `json:"id"`
+	Label    string `json:"label"`
+	Amount   Money  `json:"amount"`
+	Selected bool   `json:"selected,omitempty"`
+}
+
+type PaymentRequest struct {
+	MethodData []PaymentMethodData `json:"methodData"`
+	Details    PaymentDetails      `json:"details"`
+	Options    PaymentOptions      `json:"options,omitempty"`
+}