feat: ios mobil arayüz tasarımı

ios/Bookibra/ViewModels/AuthViewModel.swift

@@ -0,0 +1,53 @@
+import Foundation
+
+@MainActor
+final class AuthViewModel: ObservableObject {
+    enum Mode: String, CaseIterable {
+        case login
+        case register
+    }
+
+    static let tokenKey = "bookibra.jwt"
+    static let emailKey = "bookibra.email"
+
+    @Published var mode: Mode = .login
+    @Published var email = ""
+    @Published var password = ""
+    @Published var isLoading = false
+    @Published var errorMessage: String?
+
+    private let authService: AuthServiceProtocol
+    private let keychain: KeychainStoreProtocol
+
+    init(authService: AuthServiceProtocol, keychain: KeychainStoreProtocol) {
+        self.authService = authService
+        self.keychain = keychain
+    }
+
+    func submit(onSuccess: @escaping () -> Void) async {
+        guard !email.isEmpty, !password.isEmpty else {
+            errorMessage = "E-posta ve şifre gerekli"
+            return
+        }
+
+        isLoading = true
+        defer { isLoading = false }
+
+        do {
+            let response: AuthResponse
+            switch mode {
+            case .login:
+                response = try await authService.login(email: email, password: password)
+            case .register:
+                response = try await authService.register(email: email, password: password)
+            }
+
+            _ = try await authService.profile(token: response.token)
+            _ = keychain.save(response.token, for: Self.tokenKey)
+            _ = keychain.save(response.user.email, for: Self.emailKey)
+            onSuccess()
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+}