import Foundation public struct CreditEvent: Identifiable, Equatable, Codable, Sendable {    public var id: UUID    public let date: Date    public let service: String    public let creditsUsed: Double     public init(id: UUID = UUID(), date: Date, service: String, creditsUsed: Double) {        self.id = id        self.date = date        self.service = service        self.creditsUsed = creditsUsed    }     private enum CodingKeys: String, CodingKey {        case id        case date        case service        case creditsUsed    }     public init(from decoder: Decoder) throws {        let container = try decoder.container(keyedBy: CodingKeys.self)        self.id = try container.decodeIfPresent(UUID.self, forKey: .id) ?? UUID()        self.date = try container.decode(Date.self, forKey: .date)        self.service = try container.decode(String.self, forKey: .service)        self.creditsUsed = try container.decode(Double.self, forKey: .creditsUsed)    }     public func encode(to encoder: Encoder) throws {        var container = encoder.container(keyedBy: CodingKeys.self)        try container.encode(self.id, forKey: .id)        try container.encode(self.date, forKey: .date)        try container.encode(self.service, forKey: .service)        try container.encode(self.creditsUsed, forKey: .creditsUsed)    }} public struct CreditsSnapshot: Equatable, Codable, Sendable {    public let remaining: Double    public let events: [CreditEvent]    public let updatedAt: Date     public init(remaining: Double, events: [CreditEvent], updatedAt: Date) {        self.remaining = remaining        self.events = events        self.updatedAt = updatedAt    }}