feat: enhance models and services with Sendable conformance, add preview data for debugging

Mayday/Models/AppNotification.swift

@@ -1,6 +1,6 @@
 import Foundation
 
-struct AppNotification: Codable, Identifiable {
+struct AppNotification: Codable, Identifiable, Sendable {
     let id: UUID
     let topic: String
     let subject: String
@@ -22,19 +22,19 @@ struct AppNotification: Codable, Identifiable {
     var isRead: Bool { readAt != nil }
 }
 
-enum NotificationStatus: String, Codable {
+enum NotificationStatus: String, Codable, Sendable {
     case sent
     case delivered
     case read
 }
 
-enum NotificationChannel: String, Codable {
+enum NotificationChannel: String, Codable, Sendable {
     case inApp = "in_app"
     case push
     case email
 }
 
-struct NotificationsPage: Codable {
+struct NotificationsPage: Codable, Sendable {
     let items: [AppNotification]
     let total: Int
     let page: Int

Mayday/Models/Session.swift

@@ -1,6 +1,6 @@
 import Foundation
 
-struct SessionResponse: Codable, Identifiable {
+struct SessionResponse: Codable, Identifiable, Sendable {
     let id: UUID
     let userAgent: String
     let ipAddress: String

Mayday/Models/TokenPair.swift

@@ -1,6 +1,6 @@
 import Foundation
 
-struct TokenPair: Codable {
+struct TokenPair: Codable, Sendable {
     let accessToken: String
     let refreshToken: String
     let expiresAt: Date

Mayday/Models/User.swift

@@ -1,6 +1,6 @@
 import Foundation
 
-struct UserResponse: Codable, Identifiable {
+struct UserResponse: Codable, Identifiable, Sendable {
     let id: UUID
     let email: String
     let status: UserStatus
@@ -18,7 +18,7 @@ struct UserResponse: Codable, Identifiable {
     }
 }
 
-enum UserStatus: String, Codable {
+enum UserStatus: String, Codable, Sendable {
     case pending
     case active
     case suspended
@@ -26,7 +26,7 @@ enum UserStatus: String, Codable {
 }
 
 // Helper for Any JSON values
-struct AnyCodable: Codable {
+struct AnyCodable: Codable, @unchecked Sendable {
     let value: Any
 
     init(_ value: Any) {