feat: Add purchase options support

https://github.com/jaywcjlove/StoreKitHelper/issues/2

README.md

@@ -109,6 +109,20 @@ var body: some View {
 }
 ```
 
+The default purchase call remains unchanged:
+
+```swift
+await store.purchase(product)
+```
+
+If you need StoreKit purchase options, you can now pass them through directly:
+
+```swift
+await store.purchase(product, options: [
+    .appAccountToken(appAccountToken)
+])
+```
+
 Compatible legacy usage:
 
 ```swift
@@ -232,7 +246,7 @@ enum PurchaseStatus {
 
 ### StoreContext Methods
 
-- `purchase(_ product: Product)` - Purchase a specific product
+- `purchase(_ product: Product, options: Set<Product.PurchaseOption> = [])` - Purchase a specific product, optionally forwarding StoreKit purchase options
 - `restorePurchases()` - Restore previous purchases
 - `isPurchased(_ productID: ProductID) -> Bool` - Check if a product is purchased by ID
 - `isPurchased(_ product: InAppProduct) -> Bool` - Check if a product is purchased

README.zh.md

@@ -109,6 +109,20 @@ var body: some View {
 }
 ```
 
+默认购买调用方式保持不变：
+
+```swift
+await store.purchase(product)
+```
+
+如果需要传递 StoreKit 的购买选项，现在也可以直接透传：
+
+```swift
+await store.purchase(product, options: [
+    .appAccountToken(appAccountToken)
+])
+```
+
 兼容旧写法：
 
 ```swift
@@ -230,7 +244,7 @@ enum PurchaseStatus {
 
 ### StoreContext 方法
 
-- `purchase(_ product: Product)` - 购买指定产品
+- `purchase(_ product: Product, options: Set<Product.PurchaseOption> = [])` - 购买指定产品，并可选透传 StoreKit 购买参数
 - `restorePurchases()` - 恢复之前的购买
 - `isPurchased(_ productID: ProductID) -> Bool` - 根据 ID 检查产品是否已购买
 - `isPurchased(_ product: InAppProduct) -> Bool` - 检查产品是否已购买

Sources/StoreKitHelper/StoreKitHelper.swift

@@ -92,10 +92,9 @@ public final class StoreContext: ObservableObject {
     
     // MARK: 购买产品
     /// - Parameter product: 要购买的产品
-    public func purchase(_ product: Product) async {
+    public func purchase(_ product: Product, options: Set<Product.PurchaseOption> = []) async {
         do {
-            let result = try await product.purchase()
-            
+            let result = try await product.purchase(options: options)
             switch result {
             case .success(let verificationResult):
                 if let transaction = checkVerified(verificationResult) {