feat: ios mobil arayüz tasarımı

ios/Bookibra/Services/ImageCache.swift

@@ -0,0 +1,34 @@
+import Foundation
+import UIKit
+
+protocol ImageCacheProtocol {
+    func image(for url: URL) async throws -> UIImage
+}
+
+final class ImageCache: ImageCacheProtocol {
+    static let shared = ImageCache()
+
+    private let cache = NSCache<NSURL, UIImage>()
+    private let session: URLSession
+
+    init(session: URLSession = .shared) {
+        self.session = session
+        cache.countLimit = 200
+    }
+
+    func image(for url: URL) async throws -> UIImage {
+        if let existing = cache.object(forKey: url as NSURL) {
+            return existing
+        }
+
+        let request = URLRequest(url: url, cachePolicy: .returnCacheDataElseLoad, timeoutInterval: 20)
+        let (data, _) = try await session.data(for: request)
+
+        guard let image = UIImage(data: data) else {
+            throw APIError.invalidResponse
+        }
+
+        cache.setObject(image, forKey: url as NSURL)
+        return image
+    }
+}