feat: add complete Mayday iOS Xcode project

- Swift 6, SwiftUI, MVVM + async/await architecture
- iOS 17.0 minimum deployment target
- Two targets: Mayday app + MaydayLiveActivity widget extension
- Models: UserResponse, TokenPair, AppNotification, SessionResponse, AlertAttributes
- Services: HTTPClient (actor), AuthService, KeychainService, NotificationsAPIService, PushNotificationService
- ViewModels: AuthViewModel, NotificationsViewModel, SettingsViewModel
- Views: Login/Register/VerifyEmail, NotificationsList/Detail, Settings/ChangePassword/Sessions
- APNs push notifications with UIApplicationDelegate
- ActivityKit Live Activities for Dynamic Island + Lock Screen
- Keychain (Security framework) token storage
- 30-second polling with pagination for notifications
- Xcode project file (project.pbxproj) with correct build phases for both targets

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Mayday/Models/AlertAttributes.swift

@@ -0,0 +1,49 @@
+import ActivityKit
+import Foundation
+
+struct AlertAttributes: ActivityAttributes {
+    let topic: String
+    let alertId: String
+    let severity: Severity
+
+    struct ContentState: Codable, Hashable {
+        let title: String
+        let value: String?
+        let status: AlertStatus
+        let startedAt: Date
+        let updatedAt: Date
+
+        enum CodingKeys: String, CodingKey {
+            case title, value, status
+            case startedAt = "startedAt"
+            case updatedAt = "updatedAt"
+        }
+    }
+}
+
+enum Severity: String, Codable, Hashable {
+    case critical
+    case warning
+    case info
+
+    var color: String {
+        switch self {
+        case .critical: return "red"
+        case .warning: return "yellow"
+        case .info: return "blue"
+        }
+    }
+
+    var emoji: String {
+        switch self {
+        case .critical: return "🔴"
+        case .warning: return "🟡"
+        case .info: return "🔵"
+        }
+    }
+}
+
+enum AlertStatus: String, Codable, Hashable {
+    case active
+    case resolved
+}

Mayday/Models/AppNotification.swift

@@ -0,0 +1,47 @@
+import Foundation
+
+struct AppNotification: Codable, Identifiable {
+    let id: UUID
+    let topic: String
+    let subject: String
+    let body: String
+    let metadata: [String: String]?
+    let status: NotificationStatus
+    let channel: NotificationChannel
+    let readAt: Date?
+    let createdAt: Date
+    let updatedAt: Date
+
+    enum CodingKeys: String, CodingKey {
+        case id, topic, subject, body, metadata, status, channel
+        case readAt = "read_at"
+        case createdAt = "created_at"
+        case updatedAt = "updated_at"
+    }
+
+    var isRead: Bool { readAt != nil }
+}
+
+enum NotificationStatus: String, Codable {
+    case sent
+    case delivered
+    case read
+}
+
+enum NotificationChannel: String, Codable {
+    case inApp = "in_app"
+    case push
+    case email
+}
+
+struct NotificationsPage: Codable {
+    let items: [AppNotification]
+    let total: Int
+    let page: Int
+    let perPage: Int
+
+    enum CodingKeys: String, CodingKey {
+        case items, total, page
+        case perPage = "per_page"
+    }
+}

Mayday/Models/Session.swift

@@ -0,0 +1,19 @@
+import Foundation
+
+struct SessionResponse: Codable, Identifiable {
+    let id: UUID
+    let userAgent: String
+    let ipAddress: String
+    let isCurrent: Bool
+    let createdAt: Date
+    let expiresAt: Date
+
+    enum CodingKeys: String, CodingKey {
+        case id
+        case userAgent = "user_agent"
+        case ipAddress = "ip_address"
+        case isCurrent = "is_current"
+        case createdAt = "created_at"
+        case expiresAt = "expires_at"
+    }
+}

Mayday/Models/TokenPair.swift

@@ -0,0 +1,15 @@
+import Foundation
+
+struct TokenPair: Codable {
+    let accessToken: String
+    let refreshToken: String
+    let expiresAt: Date
+    let tokenType: String
+
+    enum CodingKeys: String, CodingKey {
+        case accessToken = "access_token"
+        case refreshToken = "refresh_token"
+        case expiresAt = "expires_at"
+        case tokenType = "token_type"
+    }
+}

Mayday/Models/User.swift

@@ -0,0 +1,61 @@
+import Foundation
+
+struct UserResponse: Codable, Identifiable {
+    let id: UUID
+    let email: String
+    let status: UserStatus
+    let metadata: [String: AnyCodable]?
+    let emailVerifiedAt: Date?
+    let roles: [String]
+    let createdAt: Date
+    let updatedAt: Date
+
+    enum CodingKeys: String, CodingKey {
+        case id, email, status, metadata, roles
+        case emailVerifiedAt = "email_verified_at"
+        case createdAt = "created_at"
+        case updatedAt = "updated_at"
+    }
+}
+
+enum UserStatus: String, Codable {
+    case pending
+    case active
+    case suspended
+    case deleted
+}
+
+// Helper for Any JSON values
+struct AnyCodable: Codable {
+    let value: Any
+
+    init(_ value: Any) {
+        self.value = value
+    }
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        if let int = try? container.decode(Int.self) {
+            value = int
+        } else if let double = try? container.decode(Double.self) {
+            value = double
+        } else if let bool = try? container.decode(Bool.self) {
+            value = bool
+        } else if let string = try? container.decode(String.self) {
+            value = string
+        } else {
+            value = ""
+        }
+    }
+
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.singleValueContainer()
+        switch value {
+        case let int as Int: try container.encode(int)
+        case let double as Double: try container.encode(double)
+        case let bool as Bool: try container.encode(bool)
+        case let string as String: try container.encode(string)
+        default: try container.encode("")
+        }
+    }
+}