cards-native/Sources/Core/Sync/MediaEnvironment.swift

import SwiftUI

/// Environment-Key, der den shared `MediaCache` durch die View-Hierarchie
/// reicht. App-Entrypoint setzt den Wert; Views lesen via
/// `@Environment(\.mediaCache)`.
private struct MediaCacheKey: EnvironmentKey {
    static let defaultValue: MediaCache? = nil
}

extension EnvironmentValues {
    var mediaCache: MediaCache? {
        get { self[MediaCacheKey.self] }
        set { self[MediaCacheKey.self] = newValue }
    }
}