add claude

ios/AiCard/AiCard/Models/User.swift

@@ -0,0 +1,25 @@
+import Foundation
+
+struct User: Codable {
+    let did: String
+    let handle: String
+}
+
+struct LoginRequest: Codable {
+    let identifier: String
+    let password: String
+}
+
+struct LoginResponse: Codable {
+    let accessToken: String
+    let tokenType: String
+    let did: String
+    let handle: String
+    
+    private enum CodingKeys: String, CodingKey {
+        case accessToken = "access_token"
+        case tokenType = "token_type"
+        case did
+        case handle
+    }
+}