Restructure project folders

ABS Client Mac/Audiobookshelf swift.xcodeproj/project.pbxproj

@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXFileReference section */
-		39614D0B2FB4D44500DBEF5E /* Audiobookshelf swift.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Audiobookshelf swift.app"; sourceTree = BUILT_PRODUCTS_DIR; };
+		39614D0B2FB4D44500DBEF5E /* ABS Client.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "ABS Client.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
 /* Begin PBXFileSystemSynchronizedRootGroup section */
@@ -40,7 +40,7 @@
 		39614D0C2FB4D44500DBEF5E /* Products */ = {
 			isa = PBXGroup;
 			children = (
-				39614D0B2FB4D44500DBEF5E /* Audiobookshelf swift.app */,
+				39614D0B2FB4D44500DBEF5E /* ABS Client.app */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -67,7 +67,7 @@
 			packageProductDependencies = (
 			);
 			productName = "Audiobookshelf swift";
-			productReference = 39614D0B2FB4D44500DBEF5E /* Audiobookshelf swift.app */;
+			productReference = 39614D0B2FB4D44500DBEF5E /* ABS Client.app */;
 			productType = "com.apple.product-type.application";
 		};
 /* End PBXNativeTarget section */
@@ -248,21 +248,25 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 1;
-				ENABLE_APP_SANDBOX = YES;
+				DEVELOPMENT_TEAM = PP34X97WS3;
+				ENABLE_APP_SANDBOX = NO;
 				ENABLE_PREVIEWS = YES;
-				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = "ABS Client";
+				INFOPLIST_KEY_CFBundleName = "ABS Client";
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.books";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = "com.local.Audiobookshelf-swift";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.local.ABS-Client";
-				PRODUCT_NAME = "$(TARGET_NAME)";
+				PRODUCT_NAME = "ABS Client";
 				REGISTER_APP_GROUPS = YES;
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_APPROACHABLE_CONCURRENCY = YES;
@@ -278,21 +282,25 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 1;
-				ENABLE_APP_SANDBOX = YES;
+				DEVELOPMENT_TEAM = PP34X97WS3;
+				ENABLE_APP_SANDBOX = NO;
 				ENABLE_PREVIEWS = YES;
-				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = "ABS Client";
+				INFOPLIST_KEY_CFBundleName = "ABS Client";
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.books";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = "com.local.Audiobookshelf-swift";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.local.ABS-Client";
-				PRODUCT_NAME = "$(TARGET_NAME)";
+				PRODUCT_NAME = "ABS Client";
 				REGISTER_APP_GROUPS = YES;
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_APPROACHABLE_CONCURRENCY = YES;

ABS Client Mac/Audiobookshelf swift.xcodeproj/xcuserdata/scarriffle.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Bucket
+   uuid = "31076C78-07D5-4F41-A530-12A6CA1E48B0"
+   type = "1"
+   version = "2.0">
+</Bucket>

ABS Client Mac/Audiobookshelf swift/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,51 +1,61 @@
 {
   "images" : [
     {
+      "filename" : "icon_16x16.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "16x16"
     },
     {
+      "filename" : "icon_16x16@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "16x16"
     },
     {
+      "filename" : "icon_32x32.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "32x32"
     },
     {
+      "filename" : "icon_32x32@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "32x32"
     },
     {
+      "filename" : "icon_128x128.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "128x128"
     },
     {
+      "filename" : "icon_128x128@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "128x128"
     },
     {
+      "filename" : "icon_256x256.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "256x256"
     },
     {
+      "filename" : "icon_256x256@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "256x256"
     },
     {
+      "filename" : "icon_512x512.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "512x512"
     },
     {
+      "filename" : "icon_512x512@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "512x512"

ABS Client Mac/Audiobookshelf swift/Audiobookshelf_swiftApp.swift

@@ -0,0 +1,20 @@
+import SwiftUI
+
+@main
+struct Audiobookshelf_swiftApp: App {
+    @State private var appState = AppState()
+
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+                .environment(appState)
+                .task { await appState.bootstrap() }
+        }
+        .windowResizability(.contentSize)
+
+        Settings {
+            SettingsView()
+                .environment(appState)
+        }
+    }
+}

ABS Client Mac/Audiobookshelf swift/Models/APIResponses.swift

@@ -0,0 +1,86 @@
+import Foundation
+
+struct LoginResponseDTO: Decodable {
+    let user: UserDTO
+}
+
+struct UserDTO: Decodable {
+    let id: String
+    let username: String?
+    let token: String
+}
+
+struct LibrariesResponseDTO: Decodable {
+    let libraries: [LibraryDTO]
+}
+
+struct LibraryDTO: Decodable {
+    let id: String
+    let name: String
+    let mediaType: String?
+}
+
+struct LibraryItemsResponseDTO: Decodable {
+    let results: [LibraryItemDTO]
+    let total: Int?
+}
+
+struct LibraryItemDTO: Decodable {
+    let id: String
+    let mediaType: String?
+    let media: MediaDTO?
+}
+
+struct MediaDTO: Decodable {
+    let metadata: MetadataDTO?
+    let duration: Double?
+    let audioFiles: [AudioFileDTO]?
+    let episodes: [EpisodeDTO]?
+}
+
+struct MetadataDTO: Decodable {
+    let title: String?
+    let authorName: String?
+    let author: String?
+    let description: String?
+}
+
+struct EpisodeDTO: Decodable {
+    let id: String
+    let title: String?
+    let subtitle: String?
+    let pubDate: String?
+    let publishedAt: Double?
+    let season: String?
+    let episode: String?
+    let duration: Double?
+    let audioFile: AudioFileDTO?
+}
+
+struct AudioFileDTO: Decodable {
+    let ino: String
+    let index: Int?
+    let metadata: AudioFileMetadataDTO?
+    let duration: Double?
+
+    struct AudioFileMetadataDTO: Decodable {
+        let filename: String?
+        let ext: String?
+    }
+}
+
+struct ProgressResponseDTO: Decodable {
+    let id: String?
+    let libraryItemId: String?
+    let episodeId: String?
+    let currentTime: Double?
+    let duration: Double?
+    let isFinished: Bool?
+    let lastUpdate: Double?
+}
+
+struct MeResponseDTO: Decodable {
+    let id: String?
+    let username: String?
+    let mediaProgress: [ProgressResponseDTO]?
+}

ABS Client Mac/Audiobookshelf swift/Models/Models.swift

@@ -0,0 +1,81 @@
+import Foundation
+
+struct Library: Codable, Identifiable, Hashable {
+    let id: String
+    let name: String
+    let mediaType: String?
+}
+
+struct LibraryItem: Codable, Identifiable, Hashable {
+    let id: String
+    let title: String
+    let author: String
+    let durationSeconds: Double
+    let audioFiles: [AudioFile]
+    var mediaType: String = "book"
+    var episodeId: String? = nil
+    var description: String? = nil
+
+    var isPodcast: Bool { mediaType == "podcast" }
+    var isPodcastContainer: Bool { isPodcast && episodeId == nil }
+    var isPodcastEpisode: Bool { isPodcast && episodeId != nil }
+
+    static func == (lhs: LibraryItem, rhs: LibraryItem) -> Bool {
+        lhs.id == rhs.id && lhs.episodeId == rhs.episodeId
+    }
+    func hash(into hasher: inout Hasher) {
+        hasher.combine(id)
+        hasher.combine(episodeId)
+    }
+}
+
+struct PodcastEpisode: Identifiable, Hashable, Codable {
+    let id: String
+    let title: String
+    let pubDate: String?
+    let publishedAtMillis: Double?
+    let season: String?
+    let episode: String?
+    let durationSeconds: Double
+    let audioFile: AudioFile
+
+    var formattedDate: String? {
+        if let ms = publishedAtMillis, ms > 0 {
+            let date = Date(timeIntervalSince1970: ms / 1000.0)
+            let df = DateFormatter()
+            df.dateStyle = .medium
+            df.timeStyle = .none
+            return df.string(from: date)
+        }
+        return pubDate
+    }
+}
+
+struct AudioFile: Codable, Hashable {
+    let ino: String
+    let filename: String
+    let ext: String
+    let durationSeconds: Double
+    let index: Int
+}
+
+struct PlaybackProgress: Codable, Hashable {
+    let itemId: String
+    var episodeId: String?
+    var currentTime: Double
+    var duration: Double
+    var isFinished: Bool
+    var updatedAt: Date
+
+    var syncKey: String {
+        if let episodeId { return "\(itemId)|\(episodeId)" }
+        return itemId
+    }
+}
+
+enum DownloadState: Equatable {
+    case notDownloaded
+    case downloading(progress: Double)
+    case downloaded
+    case failed(message: String)
+}

ABS Client Mac/Audiobookshelf swift/Services/ABSClient.swift

@@ -0,0 +1,209 @@
+import Foundation
+
+enum ABSClientError: LocalizedError {
+    case noAuth
+    case invalidURL
+    case httpStatus(Int)
+    case decoding(Error)
+
+    var errorDescription: String? {
+        switch self {
+        case .noAuth: return "Nicht angemeldet."
+        case .invalidURL: return "Ungültige URL."
+        case .httpStatus(let code): return "HTTP-Status \(code)."
+        case .decoding(let err): return "Antwort konnte nicht gelesen werden: \(err.localizedDescription)"
+        }
+    }
+}
+
+@MainActor
+final class ABSClient {
+    private let auth: AuthStore
+    private let session: URLSession
+
+    init(auth: AuthStore) {
+        self.auth = auth
+        let config = URLSessionConfiguration.default
+        config.requestCachePolicy = .reloadIgnoringLocalCacheData
+        config.waitsForConnectivity = false
+        self.session = URLSession(configuration: config)
+    }
+
+    private func makeRequest(path: String, method: String = "GET", body: Data? = nil) throws -> URLRequest {
+        guard !auth.token.isEmpty, !auth.serverURL.isEmpty else { throw ABSClientError.noAuth }
+        guard let url = URL(string: auth.serverURL + path) else { throw ABSClientError.invalidURL }
+        var req = URLRequest(url: url)
+        req.httpMethod = method
+        req.setValue("Bearer \(auth.token)", forHTTPHeaderField: "Authorization")
+        if let body {
+            req.setValue("application/json", forHTTPHeaderField: "Content-Type")
+            req.httpBody = body
+        }
+        return req
+    }
+
+    private func perform<T: Decodable>(_ req: URLRequest, as: T.Type) async throws -> T {
+        let (data, response) = try await session.data(for: req)
+        guard let http = response as? HTTPURLResponse else { throw ABSClientError.httpStatus(0) }
+        guard (200..<300).contains(http.statusCode) else { throw ABSClientError.httpStatus(http.statusCode) }
+        do {
+            return try JSONDecoder().decode(T.self, from: data)
+        } catch {
+            throw ABSClientError.decoding(error)
+        }
+    }
+
+    func fetchLibraries() async throws -> [Library] {
+        let req = try makeRequest(path: "/api/libraries")
+        let dto = try await perform(req, as: LibrariesResponseDTO.self)
+        return dto.libraries.map { Library(id: $0.id, name: $0.name, mediaType: $0.mediaType) }
+    }
+
+    func fetchItems(libraryId: String) async throws -> [LibraryItem] {
+        let req = try makeRequest(path: "/api/libraries/\(libraryId)/items?limit=500&sort=media.metadata.title")
+        let dto = try await perform(req, as: LibraryItemsResponseDTO.self)
+        return dto.results.map { Self.toLibraryItem(from: $0) }
+    }
+
+    private static func toLibraryItem(from raw: LibraryItemDTO) -> LibraryItem {
+        let meta = raw.media?.metadata
+        let mediaType = raw.mediaType ?? "book"
+        let files: [AudioFile] = (raw.media?.audioFiles ?? []).enumerated().map { idx, f in
+            AudioFile(
+                ino: f.ino,
+                filename: f.metadata?.filename ?? "track-\(idx).mp3",
+                ext: (f.metadata?.ext ?? "mp3").trimmingCharacters(in: CharacterSet(charactersIn: ".")),
+                durationSeconds: f.duration ?? 0,
+                index: f.index ?? idx
+            )
+        }.sorted { $0.index < $1.index }
+        let authorString = meta?.authorName ?? meta?.author ?? (mediaType == "podcast" ? "Podcast" : "Unbekannter Autor")
+        var item = LibraryItem(
+            id: raw.id,
+            title: meta?.title ?? "Unbekannt",
+            author: authorString,
+            durationSeconds: raw.media?.duration ?? 0,
+            audioFiles: files
+        )
+        item.mediaType = mediaType
+        item.description = meta?.description
+        return item
+    }
+
+    func fetchEpisodes(podcastItemId: String) async throws -> (LibraryItem, [PodcastEpisode]) {
+        let req = try makeRequest(path: "/api/items/\(podcastItemId)?expanded=1")
+        let raw = try await perform(req, as: LibraryItemDTO.self)
+        let item = Self.toLibraryItem(from: raw)
+        let episodes: [PodcastEpisode] = (raw.media?.episodes ?? []).compactMap { ep in
+            guard let af = ep.audioFile else { return nil }
+            let ext = (af.metadata?.ext ?? "mp3").trimmingCharacters(in: CharacterSet(charactersIn: "."))
+            let audioFile = AudioFile(
+                ino: af.ino,
+                filename: af.metadata?.filename ?? "episode.\(ext)",
+                ext: ext,
+                durationSeconds: af.duration ?? ep.duration ?? 0,
+                index: 0
+            )
+            return PodcastEpisode(
+                id: ep.id,
+                title: ep.title ?? "Folge",
+                pubDate: ep.pubDate,
+                publishedAtMillis: ep.publishedAt,
+                season: ep.season,
+                episode: ep.episode,
+                durationSeconds: ep.duration ?? af.duration ?? 0,
+                audioFile: audioFile
+            )
+        }.sorted { lhs, rhs in
+            (lhs.publishedAtMillis ?? 0) > (rhs.publishedAtMillis ?? 0)
+        }
+        return (item, episodes)
+    }
+
+    func fetchItemDetail(itemId: String) async throws -> LibraryItem {
+        let req = try makeRequest(path: "/api/items/\(itemId)?expanded=1")
+        let raw = try await perform(req, as: LibraryItemDTO.self)
+        return Self.toLibraryItem(from: raw)
+    }
+
+    private func progressPath(itemId: String, episodeId: String?) -> String {
+        if let episodeId { return "/api/me/progress/\(itemId)/\(episodeId)" }
+        return "/api/me/progress/\(itemId)"
+    }
+
+    func fetchProgress(itemId: String, episodeId: String? = nil) async throws -> PlaybackProgress? {
+        let req = try makeRequest(path: progressPath(itemId: itemId, episodeId: episodeId))
+        let (data, response) = try await session.data(for: req)
+        guard let http = response as? HTTPURLResponse else { return nil }
+        if http.statusCode == 404 { return nil }
+        guard (200..<300).contains(http.statusCode) else { throw ABSClientError.httpStatus(http.statusCode) }
+        let dto = try JSONDecoder().decode(ProgressResponseDTO.self, from: data)
+        return PlaybackProgress(
+            itemId: itemId,
+            episodeId: episodeId,
+            currentTime: dto.currentTime ?? 0,
+            duration: dto.duration ?? 0,
+            isFinished: dto.isFinished ?? false,
+            updatedAt: Date()
+        )
+    }
+
+    func saveProgress(_ progress: PlaybackProgress) async throws {
+        let body: [String: Any] = [
+            "currentTime": progress.currentTime,
+            "duration": progress.duration,
+            "isFinished": progress.isFinished,
+        ]
+        let data = try JSONSerialization.data(withJSONObject: body)
+        let req = try makeRequest(
+            path: progressPath(itemId: progress.itemId, episodeId: progress.episodeId),
+            method: "PATCH",
+            body: data
+        )
+        let (_, response) = try await session.data(for: req)
+        guard let http = response as? HTTPURLResponse, (200..<300).contains(http.statusCode) else {
+            throw ABSClientError.httpStatus((response as? HTTPURLResponse)?.statusCode ?? 0)
+        }
+    }
+
+    func fetchAllProgress() async throws -> [PlaybackProgress] {
+        let req = try makeRequest(path: "/api/me")
+        let dto = try await perform(req, as: MeResponseDTO.self)
+        return (dto.mediaProgress ?? []).compactMap { p in
+            guard let itemId = p.libraryItemId else { return nil }
+            return PlaybackProgress(
+                itemId: itemId,
+                episodeId: p.episodeId,
+                currentTime: p.currentTime ?? 0,
+                duration: p.duration ?? 0,
+                isFinished: p.isFinished ?? false,
+                updatedAt: Date()
+            )
+        }
+    }
+
+    func validateToken() async -> Bool {
+        guard let req = try? makeRequest(path: "/api/me") else { return false }
+        do {
+            let (_, response) = try await session.data(for: req)
+            return ((response as? HTTPURLResponse)?.statusCode ?? 0) < 400
+        } catch {
+            return false
+        }
+    }
+
+    func coverURL(itemId: String) -> URL? {
+        guard !auth.serverURL.isEmpty else { return nil }
+        var comps = URLComponents(string: auth.serverURL + "/api/items/\(itemId)/cover")
+        comps?.queryItems = [URLQueryItem(name: "token", value: auth.token)]
+        return comps?.url
+    }
+
+    func audioFileURL(itemId: String, ino: String) -> URL? {
+        var comps = URLComponents(string: auth.serverURL + "/api/items/\(itemId)/file/\(ino)")
+        comps?.queryItems = [URLQueryItem(name: "token", value: auth.token)]
+        return comps?.url
+    }
+
+    var bearerHeader: [String: String] { ["Authorization": "Bearer \(auth.token)"] }
+}

ABS Client Mac/Audiobookshelf swift/Services/AppState.swift

@@ -0,0 +1,224 @@
+import Foundation
+import Observation
+
+@Observable
+@MainActor
+final class AppState {
+    let auth: AuthStore
+    let client: ABSClient
+    let network: NetworkMonitor
+    let downloads: DownloadManager
+    let sync: ProgressSyncManager
+    let player: PlayerEngine
+
+    var currentItem: LibraryItem?
+    var isPreparingPlayback: Bool = false
+
+    /// Map: PlaybackProgress.syncKey -> PlaybackProgress (server-known progress).
+    /// Used to show progress bars on covers in the library views.
+    var progressCache: [String: PlaybackProgress] = [:]
+
+    private var syncTimer: Timer?
+    private var lastReportedSecond: Double = -10
+
+    init() {
+        let auth = AuthStore()
+        let client = ABSClient(auth: auth)
+        self.auth = auth
+        self.client = client
+        self.network = NetworkMonitor()
+        self.downloads = DownloadManager(client: client)
+        self.sync = ProgressSyncManager(client: client)
+        self.player = PlayerEngine()
+    }
+
+    func bootstrap() async {
+        auth.restoreSession()
+        network.start { [weak self] online in
+            guard let self else { return }
+            if online {
+                Task { [weak self] in
+                    await self?.sync.drain()
+                    await self?.refreshProgressCache()
+                }
+            }
+        }
+        if auth.isLoggedIn {
+            let ok = await client.validateToken()
+            if !ok {
+                auth.logout()
+            } else {
+                await sync.drain()
+                await refreshProgressCache()
+            }
+        }
+    }
+
+    /// Pulls the entire progress map from the server (via /api/me).
+    func refreshProgressCache() async {
+        guard network.isOnline, auth.isLoggedIn else { return }
+        do {
+            let all = try await client.fetchAllProgress()
+            progressCache = Dictionary(all.map { ($0.syncKey, $0) }, uniquingKeysWith: { _, new in new })
+        } catch {
+            // non-fatal
+        }
+    }
+
+    /// Local update for the cache while we're actively playing.
+    func cacheProgress(itemId: String, episodeId: String?, currentTime: Double, duration: Double, isFinished: Bool) {
+        let p = PlaybackProgress(
+            itemId: itemId, episodeId: episodeId,
+            currentTime: currentTime, duration: duration,
+            isFinished: isFinished, updatedAt: Date()
+        )
+        progressCache[p.syncKey] = p
+    }
+
+    func progress(for item: LibraryItem) -> PlaybackProgress? {
+        progressCache[item.syncKey]
+    }
+
+    func progressFraction(itemId: String, episodeId: String? = nil) -> Double {
+        let key = episodeId.map { "\(itemId)|\($0)" } ?? itemId
+        guard let p = progressCache[key], p.duration > 0 else { return 0 }
+        if p.isFinished { return 1.0 }
+        return min(1, max(0, p.currentTime / p.duration))
+    }
+
+    func play(item: LibraryItem) async {
+        if currentItem?.id == item.id, currentItem?.episodeId == item.episodeId, player.isReady {
+            player.play()
+            return
+        }
+        stopPlayback(reportFinal: true)
+        isPreparingPlayback = true
+        defer { isPreparingPlayback = false }
+
+        var workItem = item
+        // Only fetch detail for books with empty audioFiles (podcast episodes
+        // arrive with their single audioFile already populated by the caller).
+        if !workItem.isPodcast && workItem.audioFiles.isEmpty && network.isOnline {
+            let alreadyDownloaded = downloads.isDownloaded(downloadKey: item.downloadKey)
+            if !alreadyDownloaded, let detail = try? await client.fetchItemDetail(itemId: item.id) {
+                workItem = detail
+            }
+        }
+
+        var startAt: Double = 0
+        if network.isOnline {
+            if let p = try? await client.fetchProgress(itemId: item.id, episodeId: workItem.episodeId) {
+                // Replaying a finished item (or one with progress essentially at the end)
+                // should start from the beginning, not drop the user at the last few seconds.
+                let nearEnd = p.duration > 0 && p.currentTime >= p.duration - 10
+                if !p.isFinished && !nearEnd {
+                    startAt = p.currentTime
+                }
+            }
+        }
+
+        currentItem = workItem
+        player.load(item: workItem, client: client, downloads: downloads, startAt: startAt)
+        if player.errorMessage == nil {
+            player.play()
+            startSyncTimer()
+        }
+    }
+
+    /// Convenience for podcast episodes.
+    func play(podcast: LibraryItem, episode: PodcastEpisode) async {
+        var synthetic = LibraryItem(
+            id: podcast.id,
+            title: episode.title,
+            author: podcast.title,
+            durationSeconds: episode.durationSeconds > 0 ? episode.durationSeconds : episode.audioFile.durationSeconds,
+            audioFiles: [episode.audioFile]
+        )
+        synthetic.mediaType = "podcast"
+        synthetic.episodeId = episode.id
+        await play(item: synthetic)
+    }
+
+    func stopPlayback(reportFinal: Bool = true) {
+        if reportFinal { reportProgress(force: true) }
+        syncTimer?.invalidate()
+        syncTimer = nil
+        player.teardown()
+        currentItem = nil
+        lastReportedSecond = -10
+    }
+
+    func togglePlay() {
+        guard currentItem != nil else { return }
+        player.togglePlay()
+        if !player.isPlaying { reportProgress(force: true) }
+    }
+
+    func skip(by seconds: Double) {
+        guard currentItem != nil else { return }
+        player.skip(by: seconds)
+        reportProgress(force: true)
+    }
+
+    func seekAbsolute(_ target: Double) {
+        guard currentItem != nil else { return }
+        player.seekAbsolute(target)
+        reportProgress(force: true)
+    }
+
+    func setRate(_ newRate: Float) {
+        player.setRate(newRate)
+    }
+
+    private func startSyncTimer() {
+        syncTimer?.invalidate()
+        let timer = Timer.scheduledTimer(withTimeInterval: 5.0, repeats: true) { _ in
+            Task { @MainActor [weak self] in
+                self?.reportProgress(force: false)
+            }
+        }
+        RunLoop.main.add(timer, forMode: .common)
+        syncTimer = timer
+    }
+
+    private func reportProgress(force: Bool) {
+        guard let item = currentItem else { return }
+        let t = player.absoluteCurrentTime
+        let d = player.totalDuration
+        guard d > 0 else { return }
+        if !force && abs(t - lastReportedSecond) < 3 { return }
+        lastReportedSecond = t
+        let finished = (d - t) < 30
+
+        cacheProgress(
+            itemId: item.id,
+            episodeId: item.episodeId,
+            currentTime: t,
+            duration: d,
+            isFinished: finished
+        )
+
+        Task {
+            await sync.report(
+                itemId: item.id,
+                episodeId: item.episodeId,
+                currentTime: t,
+                duration: d,
+                isFinished: finished,
+                isOnline: network.isOnline
+            )
+        }
+    }
+}
+
+extension LibraryItem {
+    /// Matches PlaybackProgress.syncKey for cache lookups.
+    var syncKey: String {
+        if let episodeId { return "\(id)|\(episodeId)" }
+        return id
+    }
+
+    /// The DownloadManager keys downloads by this composite identifier,
+    /// allowing the same podcast item to host multiple per-episode downloads.
+    var downloadKey: String { syncKey }
+}

ABS Client Mac/Audiobookshelf swift/Services/AuthStore.swift

@@ -0,0 +1,94 @@
+import Foundation
+import Observation
+
+enum AuthError: LocalizedError {
+    case invalidURL
+    case badResponse(Int)
+    case noToken
+    case unknown(String)
+
+    var errorDescription: String? {
+        switch self {
+        case .invalidURL: return "Ungültige Server-URL."
+        case .badResponse(let code): return "Server antwortete mit Status \(code)."
+        case .noToken: return "Login fehlgeschlagen: kein Token erhalten."
+        case .unknown(let msg): return msg
+        }
+    }
+}
+
+@Observable
+@MainActor
+final class AuthStore {
+    var isLoggedIn: Bool = false
+    var serverURL: String = ""
+    var username: String = ""
+    var token: String = ""
+    var errorMessage: String?
+
+    func restoreSession() {
+        guard let creds = KeychainStore.load() else { return }
+        self.serverURL = creds.serverURL
+        self.username = creds.username
+        self.token = creds.token
+        self.isLoggedIn = true
+    }
+
+    func login(serverURL rawURL: String, username: String, password: String, remember: Bool) async {
+        errorMessage = nil
+        let normalized = Self.normalizeURL(rawURL)
+        guard let url = URL(string: normalized + "/login") else {
+            errorMessage = AuthError.invalidURL.errorDescription
+            return
+        }
+        var request = URLRequest(url: url)
+        request.httpMethod = "POST"
+        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
+        let body = ["username": username, "password": password]
+        request.httpBody = try? JSONEncoder().encode(body)
+
+        do {
+            let (data, response) = try await URLSession.shared.data(for: request)
+            guard let http = response as? HTTPURLResponse else {
+                errorMessage = "Keine HTTP-Antwort vom Server."
+                return
+            }
+            guard (200..<300).contains(http.statusCode) else {
+                errorMessage = AuthError.badResponse(http.statusCode).errorDescription
+                return
+            }
+            let decoded = try JSONDecoder().decode(LoginResponseDTO.self, from: data)
+            self.serverURL = normalized
+            self.username = decoded.user.username ?? username
+            self.token = decoded.user.token
+            self.isLoggedIn = true
+
+            if remember {
+                try? KeychainStore.save(StoredCredentials(
+                    serverURL: normalized,
+                    username: self.username,
+                    token: self.token
+                ))
+            } else {
+                KeychainStore.delete()
+            }
+        } catch {
+            errorMessage = "Login fehlgeschlagen: \(error.localizedDescription)"
+        }
+    }
+
+    func logout() {
+        KeychainStore.delete()
+        token = ""
+        isLoggedIn = false
+    }
+
+    static func normalizeURL(_ raw: String) -> String {
+        var s = raw.trimmingCharacters(in: .whitespacesAndNewlines)
+        while s.hasSuffix("/") { s.removeLast() }
+        if !s.lowercased().hasPrefix("http://") && !s.lowercased().hasPrefix("https://") {
+            s = "https://" + s
+        }
+        return s
+    }
+}

ABS Client Mac/Audiobookshelf swift/Services/DownloadManager.swift

@@ -0,0 +1,259 @@
+import Foundation
+import Observation
+
+struct DownloadedTrack: Codable, Hashable {
+    let ino: String
+    let filename: String
+    let localPath: String  // relative to AppPaths.downloadsDirectory
+    let durationSeconds: Double
+
+    enum CodingKeys: String, CodingKey {
+        case ino, filename, localPath, durationSeconds
+    }
+
+    init(ino: String, filename: String, localPath: String, durationSeconds: Double) {
+        self.ino = ino
+        self.filename = filename
+        self.localPath = localPath
+        self.durationSeconds = durationSeconds
+    }
+
+    init(from decoder: Decoder) throws {
+        let c = try decoder.container(keyedBy: CodingKeys.self)
+        ino = try c.decode(String.self, forKey: .ino)
+        filename = try c.decode(String.self, forKey: .filename)
+        localPath = try c.decode(String.self, forKey: .localPath)
+        durationSeconds = try c.decodeIfPresent(Double.self, forKey: .durationSeconds) ?? 0
+    }
+}
+
+struct DownloadedItem: Codable, Hashable {
+    let itemId: String
+    var episodeId: String?
+    let title: String
+    let author: String
+    let durationSeconds: Double
+    let tracks: [DownloadedTrack]
+
+    enum CodingKeys: String, CodingKey {
+        case itemId, episodeId, title, author, durationSeconds, tracks
+    }
+
+    init(itemId: String, episodeId: String? = nil, title: String, author: String, durationSeconds: Double, tracks: [DownloadedTrack]) {
+        self.itemId = itemId
+        self.episodeId = episodeId
+        self.title = title
+        self.author = author
+        self.durationSeconds = durationSeconds
+        self.tracks = tracks
+    }
+
+    init(from decoder: Decoder) throws {
+        let c = try decoder.container(keyedBy: CodingKeys.self)
+        itemId = try c.decode(String.self, forKey: .itemId)
+        episodeId = try c.decodeIfPresent(String.self, forKey: .episodeId)
+        title = try c.decode(String.self, forKey: .title)
+        author = try c.decode(String.self, forKey: .author)
+        durationSeconds = try c.decode(Double.self, forKey: .durationSeconds)
+        tracks = try c.decode([DownloadedTrack].self, forKey: .tracks)
+    }
+
+    var downloadKey: String {
+        if let episodeId { return "\(itemId)|\(episodeId)" }
+        return itemId
+    }
+}
+
+@Observable
+@MainActor
+final class DownloadManager {
+    private let client: ABSClient
+    /// Keyed by downloadKey (itemId or "itemId|episodeId").
+    private(set) var states: [String: DownloadState] = [:]
+    private(set) var downloadedItems: [String: DownloadedItem] = [:]
+
+    private var indexFile: URL { AppPaths.supportDirectory.appendingPathComponent("downloads-index.json") }
+    private var activeTasks: [String: Task<Void, Never>] = [:]
+
+    init(client: ABSClient) {
+        self.client = client
+        try? FileManager.default.createDirectory(at: AppPaths.downloadsDirectory, withIntermediateDirectories: true)
+        loadIndex()
+    }
+
+    func state(for downloadKey: String) -> DownloadState {
+        states[downloadKey] ?? .notDownloaded
+    }
+
+    func isDownloaded(downloadKey: String) -> Bool {
+        if case .downloaded = state(for: downloadKey) { return true }
+        return false
+    }
+
+    func localTrackURLs(for downloadKey: String) -> [URL]? {
+        guard let item = downloadedItems[downloadKey] else { return nil }
+        return item.tracks.map { AppPaths.downloadsDirectory.appendingPathComponent($0.localPath) }
+    }
+
+    /// Downloads a book (whole audioFiles list) or a podcast episode (single audioFile).
+    /// For a podcast episode pass the synthetic LibraryItem that the AppState builds
+    /// (item.id == podcastItemId, item.episodeId == episodeId, audioFiles == [episode.audioFile]).
+    func startDownload(item: LibraryItem) {
+        let key = item.downloadKey
+        guard activeTasks[key] == nil else { return }
+        states[key] = .downloading(progress: 0)
+
+        let task = Task { @MainActor [weak self] in
+            guard let self else { return }
+            var workItem = item
+
+            // Books may arrive with empty audioFiles (list endpoint omits them).
+            // Episodes always arrive populated, since AppState builds the synthetic item.
+            if !workItem.isPodcast && workItem.audioFiles.isEmpty {
+                do {
+                    workItem = try await self.client.fetchItemDetail(itemId: item.id)
+                } catch {
+                    self.states[key] = .failed(message: "Detail konnte nicht geladen werden: \(error.localizedDescription)")
+                    self.activeTasks[key] = nil
+                    return
+                }
+            }
+            if workItem.audioFiles.isEmpty {
+                self.states[key] = .failed(message: "Keine herunterladbaren Audiodateien gefunden.")
+                self.activeTasks[key] = nil
+                return
+            }
+            await self.performDownload(workItem: workItem, downloadKey: key)
+            self.activeTasks[key] = nil
+        }
+        activeTasks[key] = task
+    }
+
+    func cancel(downloadKey: String) {
+        activeTasks[downloadKey]?.cancel()
+        activeTasks[downloadKey] = nil
+        states[downloadKey] = .notDownloaded
+    }
+
+    func delete(downloadKey: String) {
+        cancel(downloadKey: downloadKey)
+        if let item = downloadedItems[downloadKey] {
+            let dir = directoryURL(itemId: item.itemId, episodeId: item.episodeId)
+            try? FileManager.default.removeItem(at: dir)
+            // If this was an episode and the podcast's parent directory is now empty, clean it up too.
+            if item.episodeId != nil {
+                let parent = AppPaths.downloadsDirectory.appendingPathComponent(item.itemId)
+                if let contents = try? FileManager.default.contentsOfDirectory(atPath: parent.path), contents.isEmpty {
+                    try? FileManager.default.removeItem(at: parent)
+                }
+            }
+        }
+        downloadedItems.removeValue(forKey: downloadKey)
+        states[downloadKey] = .notDownloaded
+        persistIndex()
+    }
+
+    private func directoryURL(itemId: String, episodeId: String?) -> URL {
+        var dir = AppPaths.downloadsDirectory.appendingPathComponent(itemId, isDirectory: true)
+        if let episodeId {
+            dir = dir.appendingPathComponent(episodeId, isDirectory: true)
+        }
+        return dir
+    }
+
+    private func relativePath(itemId: String, episodeId: String?, fileName: String) -> String {
+        if let episodeId { return "\(itemId)/\(episodeId)/\(fileName)" }
+        return "\(itemId)/\(fileName)"
+    }
+
+    private func performDownload(workItem: LibraryItem, downloadKey: String) async {
+        let itemDir = directoryURL(itemId: workItem.id, episodeId: workItem.episodeId)
+        do {
+            try FileManager.default.createDirectory(at: itemDir, withIntermediateDirectories: true)
+        } catch {
+            states[downloadKey] = .failed(message: error.localizedDescription)
+            return
+        }
+
+        var tracks: [DownloadedTrack] = []
+        let total = max(workItem.audioFiles.count, 1)
+
+        for (idx, file) in workItem.audioFiles.enumerated() {
+            if Task.isCancelled {
+                states[downloadKey] = .notDownloaded
+                return
+            }
+            guard let url = client.audioFileURL(itemId: workItem.id, ino: file.ino) else { continue }
+            var request = URLRequest(url: url)
+            for (k, v) in client.bearerHeader { request.setValue(v, forHTTPHeaderField: k) }
+
+            do {
+                let (tempURL, response) = try await URLSession.shared.download(for: request)
+                if let http = response as? HTTPURLResponse, !(200..<300).contains(http.statusCode) {
+                    states[downloadKey] = .failed(message: "HTTP \(http.statusCode) bei Datei \(file.filename)")
+                    try? FileManager.default.removeItem(at: tempURL)
+                    return
+                }
+                let ext = file.ext.isEmpty ? "mp3" : file.ext
+                let destName = "\(String(format: "%03d", idx))-\(file.ino).\(ext)"
+                let dest = itemDir.appendingPathComponent(destName)
+                try? FileManager.default.removeItem(at: dest)
+                try FileManager.default.moveItem(at: tempURL, to: dest)
+                tracks.append(DownloadedTrack(
+                    ino: file.ino,
+                    filename: file.filename,
+                    localPath: relativePath(itemId: workItem.id, episodeId: workItem.episodeId, fileName: destName),
+                    durationSeconds: file.durationSeconds
+                ))
+                states[downloadKey] = .downloading(progress: Double(idx + 1) / Double(total))
+            } catch {
+                states[downloadKey] = .failed(message: error.localizedDescription)
+                return
+            }
+        }
+
+        let downloaded = DownloadedItem(
+            itemId: workItem.id,
+            episodeId: workItem.episodeId,
+            title: workItem.title,
+            author: workItem.author,
+            durationSeconds: workItem.durationSeconds,
+            tracks: tracks
+        )
+        downloadedItems[downloadKey] = downloaded
+        states[downloadKey] = .downloaded
+        persistIndex()
+    }
+
+    private func loadIndex() {
+        guard let data = try? Data(contentsOf: indexFile),
+              let decoded = try? JSONDecoder().decode([String: DownloadedItem].self, from: data) else { return }
+        // Re-key by current downloadKey (handles both legacy itemId-only keys and new composite keys).
+        var rekeyed: [String: DownloadedItem] = [:]
+        for (_, item) in decoded {
+            if item.tracks.isEmpty { continue }
+            rekeyed[item.downloadKey] = item
+        }
+        downloadedItems = rekeyed
+        for k in rekeyed.keys {
+            states[k] = .downloaded
+        }
+        // Clean up phantom folders.
+        for (oldKey, item) in decoded where item.tracks.isEmpty {
+            let dir = AppPaths.downloadsDirectory.appendingPathComponent(oldKey)
+            try? FileManager.default.removeItem(at: dir)
+        }
+        if rekeyed.count != decoded.count {
+            persistIndex()
+        }
+    }
+
+    private func persistIndex() {
+        do {
+            let data = try JSONEncoder().encode(downloadedItems)
+            try data.write(to: indexFile, options: .atomic)
+        } catch {
+            // non-fatal
+        }
+    }
+}

ABS Client Mac/Audiobookshelf swift/Services/KeychainStore.swift

@@ -0,0 +1,59 @@
+import Foundation
+import Security
+
+struct StoredCredentials: Codable {
+    let serverURL: String
+    let username: String
+    let token: String
+}
+
+enum KeychainError: Error {
+    case osStatus(OSStatus)
+    case encodingFailed
+}
+
+enum KeychainStore {
+    private static let service = "com.local.Audiobookshelf-swift.auth"
+    private static let account = "primary"
+
+    static func save(_ creds: StoredCredentials) throws {
+        let data = try JSONEncoder().encode(creds)
+
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: account,
+        ]
+        SecItemDelete(query as CFDictionary)
+
+        var attributes = query
+        attributes[kSecValueData as String] = data
+        attributes[kSecAttrAccessible as String] = kSecAttrAccessibleAfterFirstUnlock
+
+        let status = SecItemAdd(attributes as CFDictionary, nil)
+        guard status == errSecSuccess else { throw KeychainError.osStatus(status) }
+    }
+
+    static func load() -> StoredCredentials? {
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: account,
+            kSecReturnData as String: true,
+            kSecMatchLimit as String: kSecMatchLimitOne,
+        ]
+        var item: CFTypeRef?
+        let status = SecItemCopyMatching(query as CFDictionary, &item)
+        guard status == errSecSuccess, let data = item as? Data else { return nil }
+        return try? JSONDecoder().decode(StoredCredentials.self, from: data)
+    }
+
+    static func delete() {
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: account,
+        ]
+        SecItemDelete(query as CFDictionary)
+    }
+}

ABS Client Mac/Audiobookshelf swift/Services/NetworkMonitor.swift

@@ -0,0 +1,31 @@
+import Foundation
+import Network
+import Observation
+
+@Observable
+@MainActor
+final class NetworkMonitor {
+    var isOnline: Bool = true
+
+    private let monitor = NWPathMonitor()
+    private let queue = DispatchQueue(label: "NetworkMonitor")
+
+    func start(onChange: @escaping @MainActor (Bool) -> Void) {
+        monitor.pathUpdateHandler = { [weak self] path in
+            let online = path.status == .satisfied
+            Task { @MainActor [weak self] in
+                guard let self else { return }
+                let previous = self.isOnline
+                self.isOnline = online
+                if previous != online {
+                    onChange(online)
+                }
+            }
+        }
+        monitor.start(queue: queue)
+    }
+
+    func stop() {
+        monitor.cancel()
+    }
+}

ABS Client Mac/Audiobookshelf swift/Services/PlayerEngine.swift

@@ -0,0 +1,354 @@
+import Foundation
+import AVFoundation
+import MediaPlayer
+import Observation
+
+#if canImport(UIKit)
+import UIKit
+private typealias PlayerArtworkImage = UIImage
+#else
+import AppKit
+private typealias PlayerArtworkImage = NSImage
+#endif
+
+@Observable
+@MainActor
+final class PlayerEngine {
+    var isPlaying: Bool = false
+    var absoluteCurrentTime: Double = 0
+    var totalDuration: Double = 0
+    var rate: Float = 1.0
+    var isReady: Bool = false
+    var errorMessage: String?
+
+    private var player: AVQueuePlayer?
+    private var trackDurations: [Double] = []
+    private var trackPlayerItems: [AVPlayerItem] = []
+    private var currentTrackIndex: Int = 0
+    private var timeObserver: Any?
+    private var endObservers: [NSObjectProtocol] = []
+    private var isSeeking: Bool = false
+
+    var itemId: String?
+
+    // Now-playing metadata that travels with the current item.
+    private var currentTitle: String = ""
+    private var currentAuthor: String = ""
+    private var currentCoverURL: URL?
+    private var remoteCommandsConfigured: Bool = false
+
+    nonisolated init() {}
+
+    func load(item: LibraryItem, client: ABSClient, downloads: DownloadManager, startAt absoluteTime: Double) {
+        teardown()
+        self.itemId = item.id
+        self.errorMessage = nil
+
+        let useLocal = downloads.isDownloaded(downloadKey: item.downloadKey)
+        let urls: [URL]
+
+        if useLocal, let localURLs = downloads.localTrackURLs(for: item.downloadKey), !localURLs.isEmpty {
+            urls = localURLs
+            trackDurations = (0..<localURLs.count).map { idx in
+                idx < item.audioFiles.count ? item.audioFiles[idx].durationSeconds : 0
+            }
+        } else {
+            guard !item.audioFiles.isEmpty else {
+                errorMessage = "Dieses Hörbuch enthält keine abspielbaren Audiodateien."
+                return
+            }
+            urls = item.audioFiles.compactMap { client.audioFileURL(itemId: item.id, ino: $0.ino) }
+            trackDurations = item.audioFiles.map { $0.durationSeconds }
+        }
+
+        // When audio files carry no duration (e.g. some podcast episodes or
+        // freshly-scanned items), fall back to the item's reported total.
+        // Distribute equally across all tracks so that trackDurations.count
+        // always matches trackPlayerItems.count — a mismatch breaks
+        // handleTrackEnd and refreshAbsoluteTime.
+        if trackDurations.allSatisfy({ $0 <= 0 }) && item.durationSeconds > 0 {
+            let count = max(1, trackDurations.count)
+            let perTrack = item.durationSeconds / Double(count)
+            trackDurations = Array(repeating: perTrack, count: count)
+        }
+
+        totalDuration = trackDurations.reduce(0, +)
+
+        trackPlayerItems = urls.map { AVPlayerItem(url: $0) }
+
+        let queue = AVQueuePlayer(items: trackPlayerItems)
+        queue.rate = rate
+        self.player = queue
+
+        let center = NotificationCenter.default
+        for (idx, playerItem) in trackPlayerItems.enumerated() {
+            let token = center.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: playerItem, queue: .main) { [weak self] _ in
+                Task { @MainActor [weak self] in
+                    self?.handleTrackEnd(finishedIndex: idx)
+                }
+            }
+            endObservers.append(token)
+        }
+
+        seekAbsolute(absoluteTime)
+
+        timeObserver = queue.addPeriodicTimeObserver(
+            forInterval: CMTime(seconds: 0.5, preferredTimescale: 600),
+            queue: .main
+        ) { [weak self] _ in
+            Task { @MainActor [weak self] in
+                self?.refreshAbsoluteTime()
+            }
+        }
+
+        currentTitle = item.title
+        currentAuthor = item.author
+        currentCoverURL = client.coverURL(itemId: item.id)
+
+        configureRemoteCommandsIfNeeded()
+        updateNowPlayingInfo()
+        fetchAndAttachArtwork()
+
+        isReady = true
+    }
+
+    func play() {
+        player?.play()
+        player?.rate = rate
+        isPlaying = true
+        updateNowPlayingInfo()
+    }
+
+    func pause() {
+        player?.pause()
+        isPlaying = false
+        updateNowPlayingInfo()
+    }
+
+    func togglePlay() {
+        isPlaying ? pause() : play()
+    }
+
+    func setRate(_ newRate: Float) {
+        rate = newRate
+        if isPlaying { player?.rate = newRate }
+        updateNowPlayingInfo()
+    }
+
+    func skip(by seconds: Double) {
+        seekAbsolute(absoluteCurrentTime + seconds)
+    }
+
+    func seekAbsolute(_ target: Double) {
+        let clamped = max(0, min(target, max(totalDuration - 0.5, 0)))
+        var remaining = clamped
+        var trackIndex = 0
+        for (idx, dur) in trackDurations.enumerated() {
+            if remaining <= dur || idx == trackDurations.count - 1 {
+                trackIndex = idx
+                break
+            }
+            remaining -= dur
+        }
+        switchToTrack(index: trackIndex)
+        absoluteCurrentTime = clamped
+        guard let currentItem = player?.currentItem else {
+            // No item to seek (e.g. empty queue after failed insert) — don't
+            // leave isSeeking stuck, which would freeze refreshAbsoluteTime.
+            return
+        }
+        isSeeking = true
+        let cmTime = CMTime(seconds: max(0, remaining), preferredTimescale: 600)
+        // Use a small tolerance so seeking succeeds on formats where exact
+        // keyframe alignment isn't guaranteed (e.g. VBR MP3 without a Xing
+        // header). Zero-tolerance seeks fail silently on such files, causing
+        // the slider to snap back because the player position never moved.
+        let tolerance = CMTime(seconds: 0.5, preferredTimescale: 600)
+        currentItem.seek(to: cmTime, toleranceBefore: tolerance, toleranceAfter: tolerance) { [weak self] _ in
+            Task { @MainActor [weak self] in
+                self?.isSeeking = false
+                self?.refreshAbsoluteTime()
+                self?.updateNowPlayingInfo()
+            }
+        }
+    }
+
+    private func switchToTrack(index: Int) {
+        guard index < trackPlayerItems.count, let player else { return }
+        if index == currentTrackIndex, player.currentItem === trackPlayerItems[index] { return }
+
+        let wasPlaying = isPlaying
+        player.removeAllItems()
+        for i in index..<trackPlayerItems.count {
+            let it = trackPlayerItems[i]
+            it.seek(to: .zero, completionHandler: nil)
+            if player.canInsert(it, after: nil) {
+                player.insert(it, after: nil)
+            }
+        }
+        currentTrackIndex = index
+        if wasPlaying { player.play(); player.rate = rate }
+    }
+
+    private func handleTrackEnd(finishedIndex: Int) {
+        if finishedIndex < trackDurations.count - 1 {
+            currentTrackIndex = finishedIndex + 1
+        } else {
+            isPlaying = false
+            updateNowPlayingInfo()
+        }
+    }
+
+    private func refreshAbsoluteTime() {
+        guard let player, let current = player.currentItem else { return }
+        if isSeeking { return }
+        if let idx = trackPlayerItems.firstIndex(where: { $0 === current }) {
+            currentTrackIndex = idx
+        }
+        let trackTime = current.currentTime().seconds
+        let prior = trackDurations.prefix(currentTrackIndex).reduce(0, +)
+        let absolute = prior + (trackTime.isFinite ? trackTime : 0)
+        // AVPlayer can report an item duration slightly longer than the metadata we have.
+        // Clamp the visible time so the scrubber/labels never exceed totalDuration.
+        let cap = totalDuration > 0 ? totalDuration : absolute
+        absoluteCurrentTime = max(0, min(absolute, cap))
+        let wasPlaying = isPlaying
+        isPlaying = player.timeControlStatus == .playing
+        if wasPlaying != isPlaying { updateNowPlayingInfo() }
+    }
+
+    func teardown() {
+        if let token = timeObserver { player?.removeTimeObserver(token) }
+        timeObserver = nil
+        for obs in endObservers { NotificationCenter.default.removeObserver(obs) }
+        endObservers.removeAll()
+        player?.pause()
+        player?.removeAllItems()
+        player = nil
+        trackPlayerItems.removeAll()
+        trackDurations.removeAll()
+        isPlaying = false
+        isReady = false
+        absoluteCurrentTime = 0
+        totalDuration = 0
+        currentTrackIndex = 0
+        itemId = nil
+        errorMessage = nil
+        isSeeking = false
+        currentTitle = ""
+        currentAuthor = ""
+        currentCoverURL = nil
+        clearNowPlayingInfo()
+    }
+
+    // MARK: - Now-playing / remote commands
+
+    private func configureRemoteCommandsIfNeeded() {
+        guard !remoteCommandsConfigured else { return }
+        remoteCommandsConfigured = true
+
+        let center = MPRemoteCommandCenter.shared()
+
+        center.playCommand.addTarget { [weak self] _ in
+            Task { @MainActor in self?.play() }
+            return .success
+        }
+        center.pauseCommand.addTarget { [weak self] _ in
+            Task { @MainActor in self?.pause() }
+            return .success
+        }
+        center.togglePlayPauseCommand.addTarget { [weak self] _ in
+            Task { @MainActor in self?.togglePlay() }
+            return .success
+        }
+        applyRemoteSkipInterval(seconds: Self.currentSkipSeconds())
+        center.skipForwardCommand.addTarget { [weak self] _ in
+            let s = Double(Self.currentSkipSeconds())
+            Task { @MainActor in self?.skip(by: s) }
+            return .success
+        }
+        center.skipBackwardCommand.addTarget { [weak self] _ in
+            let s = Double(Self.currentSkipSeconds())
+            Task { @MainActor in self?.skip(by: -s) }
+            return .success
+        }
+        // Keep the lock-screen icon in sync with the user's preference.
+        NotificationCenter.default.addObserver(
+            forName: UserDefaults.didChangeNotification, object: nil, queue: .main
+        ) { [weak self] _ in
+            Task { @MainActor [weak self] in
+                self?.applyRemoteSkipInterval(seconds: Self.currentSkipSeconds())
+            }
+        }
+        center.changePlaybackPositionCommand.addTarget { [weak self] event in
+            guard let posEvent = event as? MPChangePlaybackPositionCommandEvent else {
+                return .commandFailed
+            }
+            let target = posEvent.positionTime
+            Task { @MainActor in self?.seekAbsolute(target) }
+            return .success
+        }
+        center.changePlaybackRateCommand.supportedPlaybackRates = [0.75, 1.0, 1.25, 1.5, 1.75, 2.0]
+        center.changePlaybackRateCommand.addTarget { [weak self] event in
+            guard let rateEvent = event as? MPChangePlaybackRateCommandEvent else { return .commandFailed }
+            Task { @MainActor in self?.setRate(rateEvent.playbackRate) }
+            return .success
+        }
+    }
+
+    private func updateNowPlayingInfo() {
+        guard itemId != nil else {
+            clearNowPlayingInfo()
+            return
+        }
+        var info: [String: Any] = [
+            MPMediaItemPropertyTitle: currentTitle,
+            MPMediaItemPropertyArtist: currentAuthor,
+            MPMediaItemPropertyPlaybackDuration: totalDuration,
+            MPNowPlayingInfoPropertyElapsedPlaybackTime: absoluteCurrentTime,
+            MPNowPlayingInfoPropertyPlaybackRate: isPlaying ? Double(rate) : 0.0,
+            MPNowPlayingInfoPropertyDefaultPlaybackRate: 1.0,
+            MPNowPlayingInfoPropertyMediaType: MPNowPlayingInfoMediaType.audio.rawValue,
+        ]
+        // Preserve artwork across updates so we don't blank the lock-screen image.
+        if let existing = MPNowPlayingInfoCenter.default().nowPlayingInfo,
+           let art = existing[MPMediaItemPropertyArtwork] {
+            info[MPMediaItemPropertyArtwork] = art
+        }
+        MPNowPlayingInfoCenter.default().nowPlayingInfo = info
+    }
+
+    private func fetchAndAttachArtwork() {
+        guard let url = currentCoverURL else { return }
+        Task.detached {
+            do {
+                let (data, _) = try await URLSession.shared.data(from: url)
+                guard let img = PlayerArtworkImage(data: data) else { return }
+                let artwork = MPMediaItemArtwork(boundsSize: img.size) { _ in img }
+                await MainActor.run { [weak self] in
+                    // Drop the result if the user has since switched items.
+                    guard let self, self.currentCoverURL == url else { return }
+                    var info = MPNowPlayingInfoCenter.default().nowPlayingInfo ?? [:]
+                    info[MPMediaItemPropertyArtwork] = artwork
+                    MPNowPlayingInfoCenter.default().nowPlayingInfo = info
+                }
+            } catch { }
+        }
+    }
+
+    private func clearNowPlayingInfo() {
+        MPNowPlayingInfoCenter.default().nowPlayingInfo = nil
+    }
+
+    private func applyRemoteSkipInterval(seconds: Int) {
+        let center = MPRemoteCommandCenter.shared()
+        center.skipForwardCommand.preferredIntervals = [NSNumber(value: seconds)]
+        center.skipBackwardCommand.preferredIntervals = [NSNumber(value: seconds)]
+    }
+
+    /// Reads the user-configured skip duration; defaults to 30s when unset.
+    static func currentSkipSeconds() -> Int {
+        let raw = UserDefaults.standard.integer(forKey: "skipDurationSeconds")
+        return raw > 0 ? raw : 30
+    }
+}

ABS Client Mac/Audiobookshelf swift/Services/ProgressSyncManager.swift

@@ -0,0 +1,94 @@
+import Foundation
+import Observation
+
+@Observable
+@MainActor
+final class ProgressSyncManager {
+    private let client: ABSClient
+    private(set) var queuedCount: Int = 0
+    private(set) var lastSyncError: String?
+
+    /// Latest progress per itemId, persisted to disk.
+    private var queue: [String: PlaybackProgress] = [:]
+
+    private let queueFile: URL
+
+    init(client: ABSClient) {
+        self.client = client
+        let dir = AppPaths.supportDirectory
+        try? FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
+        self.queueFile = dir.appendingPathComponent("progress-queue.json")
+        loadQueue()
+    }
+
+    func report(itemId: String, episodeId: String? = nil, currentTime: Double, duration: Double, isFinished: Bool, isOnline: Bool) async {
+        let progress = PlaybackProgress(
+            itemId: itemId,
+            episodeId: episodeId,
+            currentTime: currentTime,
+            duration: duration,
+            isFinished: isFinished,
+            updatedAt: Date()
+        )
+        let key = progress.syncKey
+
+        if isOnline {
+            do {
+                try await client.saveProgress(progress)
+                queue.removeValue(forKey: key)
+                persist()
+                lastSyncError = nil
+                return
+            } catch {
+                lastSyncError = error.localizedDescription
+            }
+        }
+
+        queue[key] = progress
+        persist()
+    }
+
+    func drain() async {
+        guard !queue.isEmpty else { return }
+        let snapshot = queue
+        for (id, progress) in snapshot {
+            do {
+                try await client.saveProgress(progress)
+                queue.removeValue(forKey: id)
+            } catch {
+                lastSyncError = error.localizedDescription
+                break
+            }
+        }
+        persist()
+    }
+
+    private func loadQueue() {
+        guard let data = try? Data(contentsOf: queueFile),
+              let decoded = try? JSONDecoder().decode([String: PlaybackProgress].self, from: data) else { return }
+        queue = decoded
+        queuedCount = decoded.count
+    }
+
+    private func persist() {
+        queuedCount = queue.count
+        do {
+            let data = try JSONEncoder().encode(queue)
+            try data.write(to: queueFile, options: .atomic)
+        } catch {
+            lastSyncError = "Queue konnte nicht gespeichert werden: \(error.localizedDescription)"
+        }
+    }
+}
+
+enum AppPaths {
+    static var supportDirectory: URL {
+        let base = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).first
+            ?? URL(fileURLWithPath: NSHomeDirectory()).appendingPathComponent("Library/Application Support")
+        return base.appendingPathComponent("AudiobookshelfClient", isDirectory: true)
+    }
+
+    static var downloadsDirectory: URL {
+        supportDirectory.appendingPathComponent("downloads", isDirectory: true)
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/ContentView.swift

@@ -0,0 +1,16 @@
+import SwiftUI
+
+struct ContentView: View {
+    @Environment(AppState.self) private var app
+
+    var body: some View {
+        Group {
+            if app.auth.isLoggedIn {
+                MainView()
+            } else {
+                LoginView()
+            }
+        }
+        .frame(minWidth: 900, minHeight: 600)
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/LibraryGridView.swift

@@ -0,0 +1,21 @@
+import SwiftUI
+
+struct LibraryGridView: View {
+    let items: [LibraryItem]
+    let onSelect: (LibraryItem) -> Void
+
+    private let columns = [GridItem(.adaptive(minimum: 180), spacing: 20)]
+
+    var body: some View {
+        ScrollView {
+            LazyVGrid(columns: columns, spacing: 20) {
+                ForEach(items) { item in
+                    LibraryItemCell(item: item)
+                        .contentShape(Rectangle())
+                        .onTapGesture { onSelect(item) }
+                }
+            }
+            .padding(20)
+        }
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/LibraryItemCell.swift

@@ -0,0 +1,158 @@
+import SwiftUI
+
+struct LibraryItemCell: View {
+    @Environment(AppState.self) private var app
+    let item: LibraryItem
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            ZStack(alignment: .bottom) {
+                ZStack(alignment: .topTrailing) {
+                    cover
+                    downloadBadge
+                        .padding(8)
+                }
+                CoverProgressBar(fraction: app.progressFraction(itemId: item.id, episodeId: item.episodeId))
+                    .padding(.horizontal, 6)
+                    .padding(.bottom, 6)
+            }
+            Text(item.title)
+                .font(.headline)
+                .lineLimit(2, reservesSpace: true)
+                .multilineTextAlignment(.leading)
+            Text(item.author)
+                .font(.subheadline)
+                .foregroundStyle(.secondary)
+                .lineLimit(1, reservesSpace: true)
+        }
+        .contextMenu {
+            downloadMenuItems
+        }
+    }
+
+    private var cover: some View {
+        Group {
+            if let url = app.client.coverURL(itemId: item.id) {
+                AsyncImage(url: url) { phase in
+                    switch phase {
+                    case .empty:
+                        Rectangle().fill(.quaternary)
+                            .overlay(ProgressView().controlSize(.small))
+                    case .success(let img):
+                        img.resizable().aspectRatio(contentMode: .fill)
+                    case .failure:
+                        Rectangle().fill(.quaternary)
+                            .overlay(Image(systemName: "book.closed").foregroundStyle(.secondary))
+                    @unknown default:
+                        Rectangle().fill(.quaternary)
+                    }
+                }
+            } else {
+                Rectangle().fill(.quaternary)
+            }
+        }
+        .frame(width: 180, height: 180)
+        .clipShape(RoundedRectangle(cornerRadius: 8))
+    }
+
+    @ViewBuilder
+    private var downloadBadge: some View {
+        let state = app.downloads.state(for: item.syncKey)
+        switch state {
+        case .downloaded:
+            Image(systemName: "checkmark.circle.fill")
+                .foregroundStyle(.white, .green)
+                .font(.title3)
+                .shadow(radius: 2)
+        case .downloading(let p):
+            DownloadProgressRing(progress: p)
+        case .failed:
+            Image(systemName: "exclamationmark.circle.fill")
+                .foregroundStyle(.white, .red)
+                .font(.title3)
+                .shadow(radius: 2)
+        case .notDownloaded:
+            EmptyView()
+        }
+    }
+
+    @ViewBuilder
+    private var downloadMenuItems: some View {
+        let key = item.syncKey
+        let state = app.downloads.state(for: key)
+        if item.isPodcastContainer {
+            // Whole-podcast downloads aren't supported; instructions only.
+            Text("Episoden zum Download in der Podcast-Ansicht auswählen")
+        } else {
+            switch state {
+            case .notDownloaded, .failed:
+                Button {
+                    app.downloads.startDownload(item: item)
+                } label: {
+                    Label("Für Offline herunterladen", systemImage: "arrow.down.circle")
+                }
+            case .downloading:
+                Button {
+                    app.downloads.cancel(downloadKey: key)
+                } label: {
+                    Label("Download abbrechen", systemImage: "xmark.circle")
+                }
+            case .downloaded:
+                Button(role: .destructive) {
+                    app.downloads.delete(downloadKey: key)
+                } label: {
+                    Label("Heruntergeladene Dateien löschen", systemImage: "trash")
+                }
+            }
+        }
+    }
+}
+
+/// Green progress bar drawn at the bottom of a cover (grid view).
+/// Hidden completely when there's no known progress.
+struct CoverProgressBar: View {
+    let fraction: Double
+
+    var body: some View {
+        if fraction > 0 {
+            GeometryReader { geo in
+                ZStack(alignment: .leading) {
+                    RoundedRectangle(cornerRadius: 2, style: .continuous)
+                        .fill(Color.black.opacity(0.55))
+                        .frame(height: 4)
+                    RoundedRectangle(cornerRadius: 2, style: .continuous)
+                        .fill(Color.green)
+                        .frame(width: max(2, geo.size.width * fraction), height: 4)
+                }
+            }
+            .frame(height: 4)
+            .shadow(color: .black.opacity(0.35), radius: 1, y: 1)
+        }
+    }
+}
+
+struct DownloadProgressRing: View {
+    let progress: Double
+
+    var body: some View {
+        ZStack {
+            Circle()
+                .fill(Color.black.opacity(0.75))
+            Circle()
+                .stroke(Color.white.opacity(0.25), lineWidth: 3)
+                .padding(4)
+            Circle()
+                .trim(from: 0, to: max(0.03, min(progress, 1)))
+                .stroke(Color.white, style: StrokeStyle(lineWidth: 3, lineCap: .round))
+                .rotationEffect(.degrees(-90))
+                .padding(4)
+                .animation(.easeInOut(duration: 0.25), value: progress)
+            Image(systemName: "arrow.down")
+                .font(.system(size: 12, weight: .bold))
+                .foregroundStyle(.white)
+        }
+        .frame(width: 32, height: 32)
+        .shadow(color: .black.opacity(0.4), radius: 3, x: 0, y: 1)
+        .help("Wird heruntergeladen … \(Int(progress * 100)) %")
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/LibraryListView.swift

@@ -0,0 +1,154 @@
+import SwiftUI
+
+enum LibraryLayout: String, CaseIterable, Identifiable {
+    case grid
+    case list
+
+    var id: String { rawValue }
+    var label: String { self == .grid ? "Kachelansicht" : "Listenansicht" }
+    var systemImage: String { self == .grid ? "square.grid.2x2" : "list.bullet" }
+}
+
+struct LibraryListView: View {
+    let items: [LibraryItem]
+    let onSelect: (LibraryItem) -> Void
+
+    var body: some View {
+        ScrollView {
+            LazyVStack(spacing: 0) {
+                ForEach(Array(items.enumerated()), id: \.element.id) { idx, item in
+                    LibraryListRow(item: item)
+                        .contentShape(Rectangle())
+                        .onTapGesture { onSelect(item) }
+                    if idx < items.count - 1 {
+                        Divider().padding(.leading, 76)
+                    }
+                }
+            }
+            .padding(.vertical, 4)
+        }
+    }
+}
+
+struct LibraryListRow: View {
+    @Environment(AppState.self) private var app
+    let item: LibraryItem
+
+    var body: some View {
+        HStack(spacing: 12) {
+            cover
+            VStack(alignment: .leading, spacing: 2) {
+                Text(item.title)
+                    .font(.headline)
+                    .lineLimit(1)
+                Text(item.author)
+                    .font(.subheadline)
+                    .foregroundStyle(.secondary)
+                    .lineLimit(1)
+                let fraction = app.progressFraction(itemId: item.id, episodeId: item.episodeId)
+                if fraction > 0 {
+                    GeometryReader { geo in
+                        ZStack(alignment: .leading) {
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.gray.opacity(0.3))
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.green)
+                                .frame(width: max(2, geo.size.width * fraction))
+                        }
+                    }
+                    .frame(height: 3)
+                    .padding(.top, 2)
+                    .padding(.trailing, 40)
+                }
+            }
+            Spacer(minLength: 8)
+            if item.durationSeconds > 0 {
+                Text(formatDuration(item.durationSeconds))
+                    .font(.caption.monospacedDigit())
+                    .foregroundStyle(.secondary)
+            }
+            downloadStatus
+                .frame(width: 28)
+        }
+        .padding(.horizontal, 16)
+        .padding(.vertical, 8)
+        .contextMenu { downloadMenuItems }
+    }
+
+    private var cover: some View {
+        Group {
+            if let url = app.client.coverURL(itemId: item.id) {
+                AsyncImage(url: url) { phase in
+                    switch phase {
+                    case .empty:
+                        Rectangle().fill(.quaternary)
+                    case .success(let img):
+                        img.resizable().aspectRatio(contentMode: .fill)
+                    case .failure:
+                        Rectangle().fill(.quaternary)
+                            .overlay(Image(systemName: "book.closed").foregroundStyle(.secondary))
+                    @unknown default:
+                        Rectangle().fill(.quaternary)
+                    }
+                }
+            } else {
+                Rectangle().fill(.quaternary)
+            }
+        }
+        .frame(width: 48, height: 48)
+        .clipShape(RoundedRectangle(cornerRadius: 4))
+    }
+
+    @ViewBuilder
+    private var downloadStatus: some View {
+        let state = app.downloads.state(for: item.downloadKey)
+        switch state {
+        case .downloaded:
+            Image(systemName: "checkmark.circle.fill")
+                .foregroundStyle(.white, .green)
+                .font(.title3)
+        case .downloading(let p):
+            DownloadProgressRing(progress: p)
+                .frame(width: 24, height: 24)
+        case .failed:
+            Image(systemName: "exclamationmark.circle.fill")
+                .foregroundStyle(.white, .red)
+                .font(.title3)
+        case .notDownloaded:
+            EmptyView()
+        }
+    }
+
+    @ViewBuilder
+    private var downloadMenuItems: some View {
+        let key = item.downloadKey
+        let state = app.downloads.state(for: key)
+        if item.isPodcastContainer {
+            Text("Episoden zum Download in der Podcast-Ansicht auswählen")
+        } else {
+            switch state {
+            case .notDownloaded, .failed:
+                Button { app.downloads.startDownload(item: item) } label: {
+                    Label("Für Offline herunterladen", systemImage: "arrow.down.circle")
+                }
+            case .downloading:
+                Button { app.downloads.cancel(downloadKey: key) } label: {
+                    Label("Download abbrechen", systemImage: "xmark.circle")
+                }
+            case .downloaded:
+                Button(role: .destructive) {
+                    app.downloads.delete(downloadKey: key)
+                } label: {
+                    Label("Heruntergeladene Dateien löschen", systemImage: "trash")
+                }
+            }
+        }
+    }
+
+    private func formatDuration(_ seconds: Double) -> String {
+        guard seconds.isFinite, seconds > 0 else { return "" }
+        let total = Int(seconds)
+        let h = total / 3600
+        let m = (total % 3600) / 60
+        if h > 0 { return "\(h) h \(m) min" }
+        return "\(m) min"
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/LoginView.swift

@@ -0,0 +1,94 @@
+import SwiftUI
+
+struct LoginView: View {
+    @Environment(AppState.self) private var app
+
+    @State private var serverURL: String = ""
+    @State private var username: String = ""
+    @State private var password: String = ""
+    @State private var remember: Bool = true
+    @State private var isLoading: Bool = false
+
+    var body: some View {
+        VStack(spacing: 16) {
+            Spacer()
+            Image(systemName: "books.vertical.fill")
+                .font(.system(size: 48))
+                .foregroundStyle(.tint)
+            Text("ABS Client")
+                .font(.largeTitle).bold()
+            Text("Verbinde dich mit deinem Audiobookshelf-Server")
+                .foregroundStyle(.secondary)
+
+            VStack(alignment: .leading, spacing: 12) {
+                LabeledField(label: "Server-URL", placeholder: "https://abs.example.com") {
+                    TextField("", text: $serverURL)
+                        .textFieldStyle(.roundedBorder)
+                        .disableAutocorrection(true)
+                }
+                LabeledField(label: "Benutzername", placeholder: "user") {
+                    TextField("", text: $username)
+                        .textFieldStyle(.roundedBorder)
+                        .disableAutocorrection(true)
+                }
+                LabeledField(label: "Passwort", placeholder: "••••••") {
+                    SecureField("", text: $password)
+                        .textFieldStyle(.roundedBorder)
+                }
+                Toggle("Anmeldung merken", isOn: $remember)
+                    .toggleStyle(.checkbox)
+            }
+            .frame(maxWidth: 380)
+
+            if let err = app.auth.errorMessage {
+                Text(err)
+                    .foregroundStyle(.red)
+                    .font(.callout)
+                    .multilineTextAlignment(.center)
+                    .frame(maxWidth: 380)
+            }
+
+            Button(action: doLogin) {
+                if isLoading {
+                    ProgressView().controlSize(.small)
+                } else {
+                    Text("Einloggen")
+                        .frame(maxWidth: 200)
+                }
+            }
+            .buttonStyle(.borderedProminent)
+            .controlSize(.large)
+            .disabled(isLoading || serverURL.isEmpty || username.isEmpty || password.isEmpty)
+            .keyboardShortcut(.defaultAction)
+
+            Spacer()
+        }
+        .padding(32)
+    }
+
+    private func doLogin() {
+        isLoading = true
+        Task {
+            await app.auth.login(
+                serverURL: serverURL,
+                username: username,
+                password: password,
+                remember: remember
+            )
+            isLoading = false
+        }
+    }
+}
+
+private struct LabeledField<Content: View>: View {
+    let label: String
+    let placeholder: String
+    @ViewBuilder let content: Content
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 4) {
+            Text(label).font(.subheadline).foregroundStyle(.secondary)
+            content
+        }
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/MainView.swift

@@ -0,0 +1,236 @@
+import SwiftUI
+
+enum LibraryFilter: Hashable {
+    case library(String)
+    case downloaded
+}
+
+@Observable
+@MainActor
+final class LibraryViewModel {
+    var libraries: [Library] = []
+    var items: [LibraryItem] = []
+    var isLoading: Bool = false
+    var errorMessage: String?
+    var selection: LibraryFilter?
+
+    func loadLibraries(client: ABSClient) async {
+        isLoading = true
+        defer { isLoading = false }
+        do {
+            libraries = try await client.fetchLibraries()
+            if selection == nil, let first = libraries.first {
+                selection = .library(first.id)
+            }
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+
+    func loadItems(client: ABSClient, downloads: DownloadManager) async {
+        guard let selection else { return }
+        isLoading = true
+        defer { isLoading = false }
+        switch selection {
+        case .library(let id):
+            do {
+                items = try await client.fetchItems(libraryId: id)
+                errorMessage = nil
+            } catch {
+                errorMessage = error.localizedDescription
+            }
+        case .downloaded:
+            items = downloads.downloadedItems.values.map { di in
+                let files: [AudioFile] = di.tracks.enumerated().map { idx, t in
+                    AudioFile(
+                        ino: t.ino,
+                        filename: t.filename,
+                        ext: "",
+                        durationSeconds: t.durationSeconds,
+                        index: idx
+                    )
+                }
+                var li = LibraryItem(
+                    id: di.itemId,
+                    title: di.title,
+                    author: di.author,
+                    durationSeconds: di.durationSeconds,
+                    audioFiles: files
+                )
+                if let episodeId = di.episodeId {
+                    li.mediaType = "podcast"
+                    li.episodeId = episodeId
+                }
+                return li
+            }.sorted { $0.title.localizedCaseInsensitiveCompare($1.title) == .orderedAscending }
+            errorMessage = nil
+        }
+    }
+}
+
+struct MainView: View {
+    @Environment(AppState.self) private var app
+    @State private var vm = LibraryViewModel()
+    @State private var navPath: [LibraryItem] = []
+    @AppStorage("libraryLayout") private var layoutRaw: String = LibraryLayout.grid.rawValue
+
+    private var layout: LibraryLayout {
+        LibraryLayout(rawValue: layoutRaw) ?? .grid
+    }
+
+    var body: some View {
+        NavigationSplitView {
+            sidebar
+        } detail: {
+            NavigationStack(path: $navPath) {
+                detail
+                    .navigationDestination(for: LibraryItem.self) { podcast in
+                        PodcastDetailView(podcast: podcast)
+                    }
+            }
+        }
+        .task {
+            await vm.loadLibraries(client: app.client)
+            await vm.loadItems(client: app.client, downloads: app.downloads)
+            await app.refreshProgressCache()
+        }
+        .onChange(of: vm.selection) { _, _ in
+            navPath.removeAll()
+            Task {
+                await vm.loadItems(client: app.client, downloads: app.downloads)
+                await app.refreshProgressCache()
+            }
+        }
+        .safeAreaInset(edge: .bottom, spacing: 0) {
+            PlayerBar()
+                .animation(.easeInOut(duration: 0.2), value: app.currentItem?.id)
+                .animation(.easeInOut(duration: 0.2), value: app.isPreparingPlayback)
+        }
+    }
+
+    private func handleSelect(_ item: LibraryItem) {
+        if item.isPodcastContainer {
+            navPath.append(item)
+        } else {
+            Task { await app.play(item: item) }
+        }
+    }
+
+    private var sidebar: some View {
+        List(selection: $vm.selection) {
+            Section("Bibliotheken") {
+                ForEach(vm.libraries) { lib in
+                    Label(lib.name, systemImage: "books.vertical")
+                        .tag(LibraryFilter.library(lib.id))
+                }
+            }
+            Section("Offline") {
+                Label("Heruntergeladen", systemImage: "arrow.down.circle.fill")
+                    .tag(LibraryFilter.downloaded)
+            }
+        }
+        .listStyle(.sidebar)
+        .navigationTitle("ABS Client")
+        .safeAreaInset(edge: .bottom) {
+            sidebarFooter
+        }
+    }
+
+    private var sidebarFooter: some View {
+        VStack(alignment: .leading, spacing: 6) {
+            Divider()
+            HStack(spacing: 8) {
+                Circle()
+                    .fill(app.network.isOnline ? .green : .orange)
+                    .frame(width: 8, height: 8)
+                Text(app.network.isOnline ? "Online" : "Offline")
+                    .font(.caption)
+                if app.sync.queuedCount > 0 {
+                    Text("(\(app.sync.queuedCount) wartend)")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                }
+                Spacer()
+            }
+            HStack {
+                Text(app.auth.username).font(.caption).foregroundStyle(.secondary)
+                Spacer()
+                Button("Abmelden") {
+                    app.stopPlayback()
+                    app.auth.logout()
+                }
+                .buttonStyle(.borderless)
+                .font(.caption)
+            }
+        }
+        .padding(.horizontal, 12)
+        .padding(.vertical, 8)
+    }
+
+    @ViewBuilder
+    private var detail: some View {
+        if vm.isLoading && vm.items.isEmpty {
+            ProgressView("Lade Bibliothek …")
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
+        } else if let err = vm.errorMessage, vm.items.isEmpty {
+            ContentUnavailableView("Fehler", systemImage: "exclamationmark.triangle", description: Text(err))
+        } else if vm.items.isEmpty {
+            ContentUnavailableView("Keine Hörbücher", systemImage: "books.vertical", description: Text("Diese Auswahl enthält noch keine Hörbücher."))
+        } else {
+            Group {
+                switch layout {
+                case .grid:
+                    LibraryGridView(items: vm.items) { item in
+                        handleSelect(item)
+                    }
+                case .list:
+                    LibraryListView(items: vm.items) { item in
+                        handleSelect(item)
+                    }
+                }
+            }
+            .navigationTitle(currentTitle)
+            .toolbar {
+                ToolbarItem(placement: .primaryAction) {
+                    Button {
+                        Task {
+                            await vm.loadLibraries(client: app.client)
+                            await vm.loadItems(client: app.client, downloads: app.downloads)
+                            await app.refreshProgressCache()
+                        }
+                    } label: {
+                        if vm.isLoading {
+                            ProgressView().controlSize(.small)
+                        } else {
+                            Image(systemName: "arrow.clockwise")
+                        }
+                    }
+                    .help("Bibliothek, Cover und Hörfortschritte neu laden")
+                    .disabled(vm.isLoading)
+                }
+                ToolbarItem(placement: .primaryAction) {
+                    Picker("Ansicht", selection: $layoutRaw) {
+                        ForEach(LibraryLayout.allCases) { l in
+                            Image(systemName: l.systemImage)
+                                .help(l.label)
+                                .tag(l.rawValue)
+                        }
+                    }
+                    .pickerStyle(.segmented)
+                    .help("Zwischen Kachel- und Listenansicht wechseln")
+                }
+            }
+        }
+    }
+
+    private var currentTitle: String {
+        switch vm.selection {
+        case .library(let id):
+            return vm.libraries.first(where: { $0.id == id })?.name ?? "Bibliothek"
+        case .downloaded:
+            return "Heruntergeladen"
+        case .none:
+            return "Bibliothek"
+        }
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/PlayerBar.swift

@@ -0,0 +1,212 @@
+import SwiftUI
+
+struct PlayerBar: View {
+    @Environment(AppState.self) private var app
+    @AppStorage("skipDurationSeconds") private var skipSeconds: Int = 30
+    @State private var scrubbing: Bool = false
+    @State private var scrubValue: Double = 0
+
+    var body: some View {
+        if let item = app.currentItem {
+            VStack(spacing: 0) {
+                Divider()
+                content(item: item)
+                    .padding(.horizontal, 16)
+                    .padding(.vertical, 10)
+                    .background(.bar)
+            }
+            .transition(.move(edge: .bottom).combined(with: .opacity))
+        } else if app.isPreparingPlayback {
+            VStack(spacing: 0) {
+                Divider()
+                HStack(spacing: 12) {
+                    ProgressView().controlSize(.small)
+                    Text("Wiedergabe wird vorbereitet …").font(.subheadline).foregroundStyle(.secondary)
+                    Spacer()
+                }
+                .padding(.horizontal, 16)
+                .padding(.vertical, 14)
+                .background(.bar)
+            }
+        }
+    }
+
+    @ViewBuilder
+    private func content(item: LibraryItem) -> some View {
+        HStack(spacing: 14) {
+            cover(item: item)
+
+            VStack(alignment: .leading, spacing: 2) {
+                Text(item.title).font(.subheadline).bold().lineLimit(1)
+                Text(item.author).font(.caption).foregroundStyle(.secondary).lineLimit(1)
+                if let err = app.player.errorMessage {
+                    Text(err).font(.caption2).foregroundStyle(.red).lineLimit(1)
+                }
+            }
+            .frame(minWidth: 160, idealWidth: 200, maxWidth: 240, alignment: .leading)
+
+            transportControls
+
+            scrubber
+                .frame(minWidth: 200)
+
+            rateMenu
+
+            Spacer(minLength: 0)
+
+            statusIndicator
+
+            Button {
+                app.stopPlayback()
+            } label: {
+                Image(systemName: "xmark.circle.fill")
+                    .foregroundStyle(.secondary)
+            }
+            .buttonStyle(.plain)
+            .help("Wiedergabe beenden")
+        }
+    }
+
+    private func cover(item: LibraryItem) -> some View {
+        Group {
+            if let url = app.client.coverURL(itemId: item.id) {
+                AsyncImage(url: url) { phase in
+                    if let img = phase.image {
+                        img.resizable().aspectRatio(contentMode: .fill)
+                    } else {
+                        Color.gray.opacity(0.3)
+                    }
+                }
+            } else {
+                Color.gray.opacity(0.3)
+            }
+        }
+        .frame(width: 48, height: 48)
+        .clipShape(RoundedRectangle(cornerRadius: 6))
+    }
+
+    private var transportControls: some View {
+        HStack(spacing: 14) {
+            Button { app.skip(by: -Double(skipSeconds)) } label: {
+                Image(systemName: skipBackImage).font(.system(size: 18))
+            }
+            .buttonStyle(.plain)
+            .disabled(!app.player.isReady)
+
+            Button { app.togglePlay() } label: {
+                Image(systemName: app.player.isPlaying ? "pause.circle.fill" : "play.circle.fill")
+                    .font(.system(size: 34))
+            }
+            .buttonStyle(.plain)
+            .disabled(!app.player.isReady)
+            .keyboardShortcut(.space, modifiers: [])
+
+            Button { app.skip(by: Double(skipSeconds)) } label: {
+                Image(systemName: skipForwardImage).font(.system(size: 18))
+            }
+            .buttonStyle(.plain)
+            .disabled(!app.player.isReady)
+        }
+    }
+
+    private var skipForwardImage: String {
+        switch skipSeconds {
+        case ...10: return "goforward.10"
+        case 11...15: return "goforward.15"
+        case 16...30: return "goforward.30"
+        case 31...45: return "goforward.45"
+        case 46...60: return "goforward.60"
+        default: return "goforward.90"
+        }
+    }
+
+    private var skipBackImage: String {
+        switch skipSeconds {
+        case ...10: return "gobackward.10"
+        case 11...15: return "gobackward.15"
+        case 16...30: return "gobackward.30"
+        case 31...45: return "gobackward.45"
+        case 46...60: return "gobackward.60"
+        default: return "gobackward.90"
+        }
+    }
+
+    private var scrubber: some View {
+        VStack(spacing: 2) {
+            Slider(
+                value: Binding(
+                    get: { scrubbing ? scrubValue : app.player.absoluteCurrentTime },
+                    set: { scrubValue = $0; scrubbing = true }
+                ),
+                in: 0...max(app.player.totalDuration, 1),
+                onEditingChanged: { editing in
+                    if !editing {
+                        app.seekAbsolute(scrubValue)
+                        scrubbing = false
+                    }
+                }
+            )
+            .disabled(!app.player.isReady)
+            HStack {
+                Text(formatTime(scrubbing ? scrubValue : app.player.absoluteCurrentTime))
+                    .font(.caption2.monospacedDigit())
+                    .foregroundStyle(.secondary)
+                Spacer()
+                Text(formatTime(app.player.totalDuration))
+                    .font(.caption2.monospacedDigit())
+                    .foregroundStyle(.secondary)
+            }
+        }
+    }
+
+    private var rateMenu: some View {
+        Menu {
+            ForEach([0.75, 1.0, 1.25, 1.5, 1.75, 2.0], id: \.self) { r in
+                Button {
+                    app.setRate(Float(r))
+                } label: {
+                    HStack {
+                        Text(String(format: "%.2g×", r))
+                        if abs(Double(app.player.rate) - r) < 0.01 {
+                            Image(systemName: "checkmark")
+                        }
+                    }
+                }
+            }
+        } label: {
+            Text(String(format: "%.2g×", Double(app.player.rate)))
+                .font(.caption.monospacedDigit())
+                .padding(.horizontal, 8).padding(.vertical, 4)
+                .overlay(Capsule().stroke(Color.secondary.opacity(0.4)))
+        }
+        .menuStyle(.borderlessButton)
+        .fixedSize()
+        .help("Geschwindigkeit")
+    }
+
+    private var statusIndicator: some View {
+        HStack(spacing: 4) {
+            Circle()
+                .fill(app.network.isOnline ? .green : .orange)
+                .frame(width: 6, height: 6)
+            if app.sync.queuedCount > 0 {
+                Text("\(app.sync.queuedCount)")
+                    .font(.caption2)
+                    .foregroundStyle(.secondary)
+            }
+        }
+        .help(app.network.isOnline ? "Online – Fortschritt wird synchronisiert" : "Offline – \(app.sync.queuedCount) Eintrag/Einträge wartend")
+    }
+
+    private func formatTime(_ seconds: Double) -> String {
+        guard seconds.isFinite, seconds >= 0 else { return "0:00" }
+        let total = Int(seconds)
+        let h = total / 3600
+        let m = (total % 3600) / 60
+        let s = total % 60
+        if h > 0 {
+            return String(format: "%d:%02d:%02d", h, m, s)
+        }
+        return String(format: "%d:%02d", m, s)
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/PodcastDetailView.swift

@@ -0,0 +1,233 @@
+import SwiftUI
+
+struct PodcastDetailView: View {
+    @Environment(AppState.self) private var app
+    let podcast: LibraryItem
+
+    @State private var episodes: [PodcastEpisode] = []
+    @State private var podcastDetail: LibraryItem?
+    @State private var isLoading: Bool = true
+    @State private var errorMessage: String?
+
+    var body: some View {
+        VStack(spacing: 0) {
+            header
+            Divider()
+            content
+        }
+        .navigationTitle(podcastDetail?.title ?? podcast.title)
+        .task { await load() }
+    }
+
+    private var header: some View {
+        HStack(spacing: 14) {
+            if let url = app.client.coverURL(itemId: podcast.id) {
+                AsyncImage(url: url) { phase in
+                    if let img = phase.image { img.resizable().aspectRatio(contentMode: .fill) }
+                    else { Color.gray.opacity(0.3) }
+                }
+                .frame(width: 72, height: 72)
+                .clipShape(RoundedRectangle(cornerRadius: 6))
+            }
+            VStack(alignment: .leading, spacing: 4) {
+                Text(podcast.title).font(.title3).bold().lineLimit(2)
+                Text(podcast.author).font(.subheadline).foregroundStyle(.secondary).lineLimit(1)
+                if !episodes.isEmpty {
+                    Text("\(episodes.count) Folge\(episodes.count == 1 ? "" : "n")")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                }
+            }
+            Spacer()
+        }
+        .padding(16)
+    }
+
+    @ViewBuilder
+    private var content: some View {
+        if isLoading {
+            ProgressView("Lade Folgen …")
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
+        } else if let err = errorMessage {
+            ContentUnavailableView("Fehler", systemImage: "exclamationmark.triangle", description: Text(err))
+        } else if episodes.isEmpty {
+            ContentUnavailableView("Keine Folgen", systemImage: "music.note.list", description: Text("Dieser Podcast enthält noch keine Folgen."))
+        } else {
+            ScrollView {
+                LazyVStack(spacing: 0) {
+                    ForEach(Array(episodes.enumerated()), id: \.element.id) { idx, ep in
+                        EpisodeRow(podcast: podcastDetail ?? podcast, episode: ep)
+                            .contentShape(Rectangle())
+                            .onTapGesture {
+                                Task { await app.play(podcast: podcastDetail ?? podcast, episode: ep) }
+                            }
+                        if idx < episodes.count - 1 {
+                            Divider().padding(.leading, 16)
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private func load() async {
+        isLoading = true
+        do {
+            let (detail, eps) = try await app.client.fetchEpisodes(podcastItemId: podcast.id)
+            podcastDetail = detail
+            episodes = eps
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+        isLoading = false
+    }
+}
+
+private struct EpisodeRow: View {
+    @Environment(AppState.self) private var app
+    let podcast: LibraryItem
+    let episode: PodcastEpisode
+
+    private var syntheticItem: LibraryItem {
+        var item = LibraryItem(
+            id: podcast.id,
+            title: episode.title,
+            author: podcast.title,
+            durationSeconds: episode.durationSeconds > 0 ? episode.durationSeconds : episode.audioFile.durationSeconds,
+            audioFiles: [episode.audioFile]
+        )
+        item.mediaType = "podcast"
+        item.episodeId = episode.id
+        return item
+    }
+
+    var body: some View {
+        HStack(alignment: .top, spacing: 12) {
+            Image(systemName: "play.circle.fill")
+                .font(.title)
+                .foregroundStyle(.tint)
+                .frame(width: 28)
+                .padding(.top, 2)
+
+            VStack(alignment: .leading, spacing: 4) {
+                Text(episode.title)
+                    .font(.headline)
+                    .lineLimit(2)
+                HStack(spacing: 10) {
+                    if let date = episode.formattedDate {
+                        Label(date, systemImage: "calendar")
+                            .labelStyle(.titleAndIcon)
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+                    if episode.durationSeconds > 0 {
+                        Label(formatDuration(episode.durationSeconds), systemImage: "clock")
+                            .labelStyle(.titleAndIcon)
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+                    if let season = episode.season, !season.isEmpty {
+                        Text("S\(season)").font(.caption).foregroundStyle(.secondary)
+                    }
+                    if let ep = episode.episode, !ep.isEmpty {
+                        Text("F\(ep)").font(.caption).foregroundStyle(.secondary)
+                    }
+                }
+                let frac = app.progressFraction(itemId: podcast.id, episodeId: episode.id)
+                if frac > 0 {
+                    GeometryReader { geo in
+                        ZStack(alignment: .leading) {
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.gray.opacity(0.3))
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.green)
+                                .frame(width: max(2, geo.size.width * frac))
+                        }
+                    }
+                    .frame(height: 3)
+                    .padding(.top, 2)
+                    .padding(.trailing, 40)
+                }
+            }
+            Spacer(minLength: 0)
+            downloadButton
+                .frame(width: 32)
+                .padding(.top, 4)
+        }
+        .padding(.horizontal, 16)
+        .padding(.vertical, 10)
+        .contextMenu { contextMenuItems }
+    }
+
+    @ViewBuilder
+    private var downloadButton: some View {
+        let key = syntheticItem.downloadKey
+        let state = app.downloads.state(for: key)
+        switch state {
+        case .notDownloaded:
+            Button {
+                app.downloads.startDownload(item: syntheticItem)
+            } label: {
+                Image(systemName: "arrow.down.circle")
+                    .font(.title3)
+                    .foregroundStyle(.secondary)
+            }
+            .buttonStyle(.plain)
+            .help("Episode für Offline herunterladen")
+        case .downloading(let p):
+            DownloadProgressRing(progress: p)
+                .frame(width: 24, height: 24)
+                .onTapGesture { app.downloads.cancel(downloadKey: key) }
+                .help("\(Int(p * 100)) % – zum Abbrechen klicken")
+        case .downloaded:
+            Image(systemName: "checkmark.circle.fill")
+                .foregroundStyle(.white, .green)
+                .font(.title3)
+                .help("Heruntergeladen")
+        case .failed(let msg):
+            Button {
+                app.downloads.startDownload(item: syntheticItem)
+            } label: {
+                Image(systemName: "exclamationmark.arrow.circlepath")
+                    .font(.title3)
+                    .foregroundStyle(.red)
+            }
+            .buttonStyle(.plain)
+            .help("Fehlgeschlagen: \(msg) – zum Wiederholen klicken")
+        }
+    }
+
+    @ViewBuilder
+    private var contextMenuItems: some View {
+        let key = syntheticItem.downloadKey
+        let state = app.downloads.state(for: key)
+        switch state {
+        case .notDownloaded, .failed:
+            Button {
+                app.downloads.startDownload(item: syntheticItem)
+            } label: {
+                Label("Folge herunterladen", systemImage: "arrow.down.circle")
+            }
+        case .downloading:
+            Button {
+                app.downloads.cancel(downloadKey: key)
+            } label: {
+                Label("Download abbrechen", systemImage: "xmark.circle")
+            }
+        case .downloaded:
+            Button(role: .destructive) {
+                app.downloads.delete(downloadKey: key)
+            } label: {
+                Label("Heruntergeladene Folge löschen", systemImage: "trash")
+            }
+        }
+    }
+
+    private func formatDuration(_ seconds: Double) -> String {
+        guard seconds.isFinite, seconds > 0 else { return "" }
+        let total = Int(seconds)
+        let h = total / 3600
+        let m = (total % 3600) / 60
+        if h > 0 { return "\(h) h \(m) min" }
+        return "\(m) min"
+    }
+}

ABS Client Mac/Audiobookshelf swift/Views/SettingsView.swift

@@ -0,0 +1,119 @@
+import SwiftUI
+
+struct SettingsView: View {
+    @Environment(AppState.self) private var app
+
+    @AppStorage("skipDurationSeconds") private var skipSeconds: Int = 30
+    @AppStorage("libraryLayout") private var layoutRaw: String = LibraryLayout.grid.rawValue
+    @AppStorage("autoRefreshOnLaunch") private var autoRefreshOnLaunch: Bool = true
+
+    @State private var showLogoutConfirm: Bool = false
+
+    private static let skipOptions: [Int] = [10, 15, 30, 45, 60, 90]
+
+    var body: some View {
+        TabView {
+            connectionPane
+                .tabItem { Label("Verbindung", systemImage: "server.rack") }
+
+            playbackPane
+                .tabItem { Label("Wiedergabe", systemImage: "play.circle") }
+
+            appearancePane
+                .tabItem { Label("Darstellung", systemImage: "square.grid.2x2") }
+
+            aboutPane
+                .tabItem { Label("Über", systemImage: "info.circle") }
+        }
+        .padding(20)
+        .frame(width: 480, height: 320)
+        .confirmationDialog(
+            "Mit Server abmelden?",
+            isPresented: $showLogoutConfirm,
+            titleVisibility: .visible
+        ) {
+            Button("Abmelden", role: .destructive) {
+                app.stopPlayback()
+                app.auth.logout()
+            }
+            Button("Abbrechen", role: .cancel) { }
+        } message: {
+            Text("Du wirst zur Login-Maske zurückgesetzt. Heruntergeladene Hörbücher bleiben erhalten.")
+        }
+    }
+
+    private var connectionPane: some View {
+        Form {
+            LabeledContent("Server") {
+                Text(app.auth.serverURL.isEmpty ? "—" : app.auth.serverURL)
+                    .foregroundStyle(.secondary)
+                    .textSelection(.enabled)
+            }
+            LabeledContent("Benutzer") {
+                Text(app.auth.username.isEmpty ? "—" : app.auth.username)
+                    .foregroundStyle(.secondary)
+            }
+            LabeledContent("Status") {
+                HStack(spacing: 6) {
+                    Circle()
+                        .fill(app.network.isOnline ? .green : .orange)
+                        .frame(width: 8, height: 8)
+                    Text(app.network.isOnline ? "Online" : "Offline")
+                    if app.sync.queuedCount > 0 {
+                        Text("(\(app.sync.queuedCount) wartend)")
+                            .foregroundStyle(.secondary)
+                    }
+                }
+            }
+            HStack {
+                Spacer()
+                Button(role: .destructive) {
+                    showLogoutConfirm = true
+                } label: {
+                    Label("Abmelden / Server wechseln", systemImage: "rectangle.portrait.and.arrow.right")
+                }
+            }
+        }
+        .formStyle(.grouped)
+    }
+
+    private var playbackPane: some View {
+        Form {
+            Picker("Sprung-Dauer", selection: $skipSeconds) {
+                ForEach(Self.skipOptions, id: \.self) { sec in
+                    Text("\(sec) s").tag(sec)
+                }
+            }
+            Text("Gilt für die Skip-Knöpfe in der Player-Leiste und Medientasten.")
+                .font(.caption)
+                .foregroundStyle(.secondary)
+        }
+        .formStyle(.grouped)
+    }
+
+    private var appearancePane: some View {
+        Form {
+            Picker("Bibliotheks-Ansicht", selection: $layoutRaw) {
+                ForEach(LibraryLayout.allCases) { l in
+                    Label(l.label, systemImage: l.systemImage).tag(l.rawValue)
+                }
+            }
+            Toggle("Beim Start automatisch aktualisieren", isOn: $autoRefreshOnLaunch)
+        }
+        .formStyle(.grouped)
+    }
+
+    private var aboutPane: some View {
+        Form {
+            LabeledContent("Version", value: appVersion)
+            LabeledContent("Heruntergeladen", value: "\(app.downloads.downloadedItems.count) Einträge")
+        }
+        .formStyle(.grouped)
+    }
+
+    private var appVersion: String {
+        let v = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "?"
+        let b = Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion") as? String ?? "?"
+        return "\(v) (\(b))"
+    }
+}

ABS Client iOS/ABS Client iOS.xcodeproj/project.pbxproj

@@ -0,0 +1,341 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 77;
+	objects = {
+
+/* Begin PBXFileReference section */
+		A0000B012FB4E10100AB5001 /* ABS Client iOS.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; name = "ABS Client iOS.app"; path = "ABS Client.app"; sourceTree = BUILT_PRODUCTS_DIR; };
+/* End PBXFileReference section */
+
+/* Begin PBXFileSystemSynchronizedRootGroup section */
+		A0000D012FB4E10100AB5001 /* ABS Client iOS */ = {
+			isa = PBXFileSystemSynchronizedRootGroup;
+			path = "ABS Client iOS";
+			sourceTree = "<group>";
+		};
+/* End PBXFileSystemSynchronizedRootGroup section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		A0000801FB4E10100AB5001 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		A0000201FB4E10100AB5001 = {
+			isa = PBXGroup;
+			children = (
+				A0000D012FB4E10100AB5001 /* ABS Client iOS */,
+				A0000C012FB4E10100AB5001 /* Products */,
+			);
+			sourceTree = "<group>";
+		};
+		A0000C012FB4E10100AB5001 /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				A0000B012FB4E10100AB5001 /* ABS Client iOS.app */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		A0000A01FB4E10100AB5001 /* ABS Client iOS */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = A0001601FB4E10100AB5001 /* Build configuration list for PBXNativeTarget "ABS Client iOS" */;
+			buildPhases = (
+				A0000701FB4E10100AB5001 /* Sources */,
+				A0000801FB4E10100AB5001 /* Frameworks */,
+				A0000901FB4E10100AB5001 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			fileSystemSynchronizedGroups = (
+				A0000D012FB4E10100AB5001 /* ABS Client iOS */,
+			);
+			name = "ABS Client iOS";
+			packageProductDependencies = (
+			);
+			productName = "ABS Client iOS";
+			productReference = A0000B012FB4E10100AB5001 /* ABS Client iOS.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		A0000301FB4E10100AB5001 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				BuildIndependentTargetsInParallel = 1;
+				LastSwiftUpdateCheck = 2640;
+				LastUpgradeCheck = 2640;
+				TargetAttributes = {
+					A0000A01FB4E10100AB5001 = {
+						CreatedOnToolsVersion = 26.4.1;
+					};
+				};
+			};
+			buildConfigurationList = A0000601FB4E10100AB5001 /* Build configuration list for PBXProject "ABS Client iOS" */;
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+				Base,
+			);
+			mainGroup = A0000201FB4E10100AB5001;
+			minimizedProjectReferenceProxies = 1;
+			preferredProjectObjectVersion = 77;
+			productRefGroup = A0000C012FB4E10100AB5001 /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				A0000A01FB4E10100AB5001 /* ABS Client iOS */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		A0000901FB4E10100AB5001 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		A0000701FB4E10100AB5001 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin XCBuildConfiguration section */
+		A0001401FB4E10100AB5001 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
+				MTL_FAST_MATH = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				SDKROOT = iphoneos;
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				TARGETED_DEVICE_FAMILY = 1;
+			};
+			name = Debug;
+		};
+		A0001501FB4E10100AB5001 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				SDKROOT = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				TARGETED_DEVICE_FAMILY = 1;
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		A0001701FB4E10100AB5001 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				ENABLE_PREVIEWS = YES;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = "ABS Client";
+				INFOPLIST_KEY_CFBundleName = "ABS Client";
+				INFOPLIST_KEY_NSAppTransportSecurity_NSAllowsArbitraryLoads = YES;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
+				INFOPLIST_KEY_UIBackgroundModes = audio;
+				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
+				INFOPLIST_KEY_UIStatusBarStyle = UIStatusBarStyleDefault;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.local.absclient.ios;
+				PRODUCT_NAME = "ABS Client";
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
+				SWIFT_VERSION = 5.0;
+			};
+			name = Debug;
+		};
+		A0001801FB4E10100AB5001 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				ENABLE_PREVIEWS = YES;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = "ABS Client";
+				INFOPLIST_KEY_CFBundleName = "ABS Client";
+				INFOPLIST_KEY_NSAppTransportSecurity_NSAllowsArbitraryLoads = YES;
+				INFOPLIST_KEY_NSHumanReadableCopyright = "";
+				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
+				INFOPLIST_KEY_UIBackgroundModes = audio;
+				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
+				INFOPLIST_KEY_UIStatusBarStyle = UIStatusBarStyleDefault;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.local.absclient.ios;
+				PRODUCT_NAME = "ABS Client";
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor;
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
+				SWIFT_VERSION = 5.0;
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		A0000601FB4E10100AB5001 /* Build configuration list for PBXProject "ABS Client iOS" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				A0001401FB4E10100AB5001 /* Debug */,
+				A0001501FB4E10100AB5001 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		A0001601FB4E10100AB5001 /* Build configuration list for PBXNativeTarget "ABS Client iOS" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				A0001701FB4E10100AB5001 /* Debug */,
+				A0001801FB4E10100AB5001 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = A0000301FB4E10100AB5001 /* Project object */;
+}

ABS Client iOS/ABS Client iOS.xcodeproj/xcuserdata/scarriffle.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>ABS Client iOS.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>

ABS Client iOS/ABS Client iOS/ABS_Client_iOSApp.swift

@@ -0,0 +1,31 @@
+import SwiftUI
+import AVFAudio
+
+@main
+struct ABS_Client_iOSApp: App {
+    @State private var appState = AppState()
+
+    init() {
+        configureAudioSession()
+    }
+
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+                .environment(appState)
+                .task { await appState.bootstrap() }
+        }
+    }
+
+    /// Allow background audio + obey the route picker.
+    /// Without this audiobooks pause when the iPhone is locked or muted.
+    private func configureAudioSession() {
+        do {
+            let session = AVAudioSession.sharedInstance()
+            try session.setCategory(.playback, mode: .spokenAudio, options: [])
+            try session.setActive(true)
+        } catch {
+            // non-fatal: user can still play audio while app is foregrounded
+        }
+    }
+}

ABS Client iOS/ABS Client iOS/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ABS Client iOS/ABS Client iOS/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,14 @@
+{
+  "images" : [
+    {
+      "filename" : "icon_1024.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ABS Client iOS/ABS Client iOS/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ABS Client iOS/ABS Client iOS/Models/APIResponses.swift

@@ -0,0 +1,86 @@
+import Foundation
+
+struct LoginResponseDTO: Decodable {
+    let user: UserDTO
+}
+
+struct UserDTO: Decodable {
+    let id: String
+    let username: String?
+    let token: String
+}
+
+struct LibrariesResponseDTO: Decodable {
+    let libraries: [LibraryDTO]
+}
+
+struct LibraryDTO: Decodable {
+    let id: String
+    let name: String
+    let mediaType: String?
+}
+
+struct LibraryItemsResponseDTO: Decodable {
+    let results: [LibraryItemDTO]
+    let total: Int?
+}
+
+struct LibraryItemDTO: Decodable {
+    let id: String
+    let mediaType: String?
+    let media: MediaDTO?
+}
+
+struct MediaDTO: Decodable {
+    let metadata: MetadataDTO?
+    let duration: Double?
+    let audioFiles: [AudioFileDTO]?
+    let episodes: [EpisodeDTO]?
+}
+
+struct MetadataDTO: Decodable {
+    let title: String?
+    let authorName: String?
+    let author: String?
+    let description: String?
+}
+
+struct EpisodeDTO: Decodable {
+    let id: String
+    let title: String?
+    let subtitle: String?
+    let pubDate: String?
+    let publishedAt: Double?
+    let season: String?
+    let episode: String?
+    let duration: Double?
+    let audioFile: AudioFileDTO?
+}
+
+struct AudioFileDTO: Decodable {
+    let ino: String
+    let index: Int?
+    let metadata: AudioFileMetadataDTO?
+    let duration: Double?
+
+    struct AudioFileMetadataDTO: Decodable {
+        let filename: String?
+        let ext: String?
+    }
+}
+
+struct ProgressResponseDTO: Decodable {
+    let id: String?
+    let libraryItemId: String?
+    let episodeId: String?
+    let currentTime: Double?
+    let duration: Double?
+    let isFinished: Bool?
+    let lastUpdate: Double?
+}
+
+struct MeResponseDTO: Decodable {
+    let id: String?
+    let username: String?
+    let mediaProgress: [ProgressResponseDTO]?
+}

ABS Client iOS/ABS Client iOS/Models/Models.swift

@@ -0,0 +1,81 @@
+import Foundation
+
+struct Library: Codable, Identifiable, Hashable {
+    let id: String
+    let name: String
+    let mediaType: String?
+}
+
+struct LibraryItem: Codable, Identifiable, Hashable {
+    let id: String
+    let title: String
+    let author: String
+    let durationSeconds: Double
+    let audioFiles: [AudioFile]
+    var mediaType: String = "book"
+    var episodeId: String? = nil
+    var description: String? = nil
+
+    var isPodcast: Bool { mediaType == "podcast" }
+    var isPodcastContainer: Bool { isPodcast && episodeId == nil }
+    var isPodcastEpisode: Bool { isPodcast && episodeId != nil }
+
+    static func == (lhs: LibraryItem, rhs: LibraryItem) -> Bool {
+        lhs.id == rhs.id && lhs.episodeId == rhs.episodeId
+    }
+    func hash(into hasher: inout Hasher) {
+        hasher.combine(id)
+        hasher.combine(episodeId)
+    }
+}
+
+struct PodcastEpisode: Identifiable, Hashable, Codable {
+    let id: String
+    let title: String
+    let pubDate: String?
+    let publishedAtMillis: Double?
+    let season: String?
+    let episode: String?
+    let durationSeconds: Double
+    let audioFile: AudioFile
+
+    var formattedDate: String? {
+        if let ms = publishedAtMillis, ms > 0 {
+            let date = Date(timeIntervalSince1970: ms / 1000.0)
+            let df = DateFormatter()
+            df.dateStyle = .medium
+            df.timeStyle = .none
+            return df.string(from: date)
+        }
+        return pubDate
+    }
+}
+
+struct AudioFile: Codable, Hashable {
+    let ino: String
+    let filename: String
+    let ext: String
+    let durationSeconds: Double
+    let index: Int
+}
+
+struct PlaybackProgress: Codable, Hashable {
+    let itemId: String
+    var episodeId: String?
+    var currentTime: Double
+    var duration: Double
+    var isFinished: Bool
+    var updatedAt: Date
+
+    var syncKey: String {
+        if let episodeId { return "\(itemId)|\(episodeId)" }
+        return itemId
+    }
+}
+
+enum DownloadState: Equatable {
+    case notDownloaded
+    case downloading(progress: Double)
+    case downloaded
+    case failed(message: String)
+}

ABS Client iOS/ABS Client iOS/Services/ABSClient.swift

@@ -0,0 +1,209 @@
+import Foundation
+
+enum ABSClientError: LocalizedError {
+    case noAuth
+    case invalidURL
+    case httpStatus(Int)
+    case decoding(Error)
+
+    var errorDescription: String? {
+        switch self {
+        case .noAuth: return "Nicht angemeldet."
+        case .invalidURL: return "Ungültige URL."
+        case .httpStatus(let code): return "HTTP-Status \(code)."
+        case .decoding(let err): return "Antwort konnte nicht gelesen werden: \(err.localizedDescription)"
+        }
+    }
+}
+
+@MainActor
+final class ABSClient {
+    private let auth: AuthStore
+    private let session: URLSession
+
+    init(auth: AuthStore) {
+        self.auth = auth
+        let config = URLSessionConfiguration.default
+        config.requestCachePolicy = .reloadIgnoringLocalCacheData
+        config.waitsForConnectivity = false
+        self.session = URLSession(configuration: config)
+    }
+
+    private func makeRequest(path: String, method: String = "GET", body: Data? = nil) throws -> URLRequest {
+        guard !auth.token.isEmpty, !auth.serverURL.isEmpty else { throw ABSClientError.noAuth }
+        guard let url = URL(string: auth.serverURL + path) else { throw ABSClientError.invalidURL }
+        var req = URLRequest(url: url)
+        req.httpMethod = method
+        req.setValue("Bearer \(auth.token)", forHTTPHeaderField: "Authorization")
+        if let body {
+            req.setValue("application/json", forHTTPHeaderField: "Content-Type")
+            req.httpBody = body
+        }
+        return req
+    }
+
+    private func perform<T: Decodable>(_ req: URLRequest, as: T.Type) async throws -> T {
+        let (data, response) = try await session.data(for: req)
+        guard let http = response as? HTTPURLResponse else { throw ABSClientError.httpStatus(0) }
+        guard (200..<300).contains(http.statusCode) else { throw ABSClientError.httpStatus(http.statusCode) }
+        do {
+            return try JSONDecoder().decode(T.self, from: data)
+        } catch {
+            throw ABSClientError.decoding(error)
+        }
+    }
+
+    func fetchLibraries() async throws -> [Library] {
+        let req = try makeRequest(path: "/api/libraries")
+        let dto = try await perform(req, as: LibrariesResponseDTO.self)
+        return dto.libraries.map { Library(id: $0.id, name: $0.name, mediaType: $0.mediaType) }
+    }
+
+    func fetchItems(libraryId: String) async throws -> [LibraryItem] {
+        let req = try makeRequest(path: "/api/libraries/\(libraryId)/items?limit=500&sort=media.metadata.title")
+        let dto = try await perform(req, as: LibraryItemsResponseDTO.self)
+        return dto.results.map { Self.toLibraryItem(from: $0) }
+    }
+
+    private static func toLibraryItem(from raw: LibraryItemDTO) -> LibraryItem {
+        let meta = raw.media?.metadata
+        let mediaType = raw.mediaType ?? "book"
+        let files: [AudioFile] = (raw.media?.audioFiles ?? []).enumerated().map { idx, f in
+            AudioFile(
+                ino: f.ino,
+                filename: f.metadata?.filename ?? "track-\(idx).mp3",
+                ext: (f.metadata?.ext ?? "mp3").trimmingCharacters(in: CharacterSet(charactersIn: ".")),
+                durationSeconds: f.duration ?? 0,
+                index: f.index ?? idx
+            )
+        }.sorted { $0.index < $1.index }
+        let authorString = meta?.authorName ?? meta?.author ?? (mediaType == "podcast" ? "Podcast" : "Unbekannter Autor")
+        var item = LibraryItem(
+            id: raw.id,
+            title: meta?.title ?? "Unbekannt",
+            author: authorString,
+            durationSeconds: raw.media?.duration ?? 0,
+            audioFiles: files
+        )
+        item.mediaType = mediaType
+        item.description = meta?.description
+        return item
+    }
+
+    func fetchEpisodes(podcastItemId: String) async throws -> (LibraryItem, [PodcastEpisode]) {
+        let req = try makeRequest(path: "/api/items/\(podcastItemId)?expanded=1")
+        let raw = try await perform(req, as: LibraryItemDTO.self)
+        let item = Self.toLibraryItem(from: raw)
+        let episodes: [PodcastEpisode] = (raw.media?.episodes ?? []).compactMap { ep in
+            guard let af = ep.audioFile else { return nil }
+            let ext = (af.metadata?.ext ?? "mp3").trimmingCharacters(in: CharacterSet(charactersIn: "."))
+            let audioFile = AudioFile(
+                ino: af.ino,
+                filename: af.metadata?.filename ?? "episode.\(ext)",
+                ext: ext,
+                durationSeconds: af.duration ?? ep.duration ?? 0,
+                index: 0
+            )
+            return PodcastEpisode(
+                id: ep.id,
+                title: ep.title ?? "Folge",
+                pubDate: ep.pubDate,
+                publishedAtMillis: ep.publishedAt,
+                season: ep.season,
+                episode: ep.episode,
+                durationSeconds: ep.duration ?? af.duration ?? 0,
+                audioFile: audioFile
+            )
+        }.sorted { lhs, rhs in
+            (lhs.publishedAtMillis ?? 0) > (rhs.publishedAtMillis ?? 0)
+        }
+        return (item, episodes)
+    }
+
+    func fetchItemDetail(itemId: String) async throws -> LibraryItem {
+        let req = try makeRequest(path: "/api/items/\(itemId)?expanded=1")
+        let raw = try await perform(req, as: LibraryItemDTO.self)
+        return Self.toLibraryItem(from: raw)
+    }
+
+    private func progressPath(itemId: String, episodeId: String?) -> String {
+        if let episodeId { return "/api/me/progress/\(itemId)/\(episodeId)" }
+        return "/api/me/progress/\(itemId)"
+    }
+
+    func fetchProgress(itemId: String, episodeId: String? = nil) async throws -> PlaybackProgress? {
+        let req = try makeRequest(path: progressPath(itemId: itemId, episodeId: episodeId))
+        let (data, response) = try await session.data(for: req)
+        guard let http = response as? HTTPURLResponse else { return nil }
+        if http.statusCode == 404 { return nil }
+        guard (200..<300).contains(http.statusCode) else { throw ABSClientError.httpStatus(http.statusCode) }
+        let dto = try JSONDecoder().decode(ProgressResponseDTO.self, from: data)
+        return PlaybackProgress(
+            itemId: itemId,
+            episodeId: episodeId,
+            currentTime: dto.currentTime ?? 0,
+            duration: dto.duration ?? 0,
+            isFinished: dto.isFinished ?? false,
+            updatedAt: Date()
+        )
+    }
+
+    func saveProgress(_ progress: PlaybackProgress) async throws {
+        let body: [String: Any] = [
+            "currentTime": progress.currentTime,
+            "duration": progress.duration,
+            "isFinished": progress.isFinished,
+        ]
+        let data = try JSONSerialization.data(withJSONObject: body)
+        let req = try makeRequest(
+            path: progressPath(itemId: progress.itemId, episodeId: progress.episodeId),
+            method: "PATCH",
+            body: data
+        )
+        let (_, response) = try await session.data(for: req)
+        guard let http = response as? HTTPURLResponse, (200..<300).contains(http.statusCode) else {
+            throw ABSClientError.httpStatus((response as? HTTPURLResponse)?.statusCode ?? 0)
+        }
+    }
+
+    func fetchAllProgress() async throws -> [PlaybackProgress] {
+        let req = try makeRequest(path: "/api/me")
+        let dto = try await perform(req, as: MeResponseDTO.self)
+        return (dto.mediaProgress ?? []).compactMap { p in
+            guard let itemId = p.libraryItemId else { return nil }
+            return PlaybackProgress(
+                itemId: itemId,
+                episodeId: p.episodeId,
+                currentTime: p.currentTime ?? 0,
+                duration: p.duration ?? 0,
+                isFinished: p.isFinished ?? false,
+                updatedAt: Date()
+            )
+        }
+    }
+
+    func validateToken() async -> Bool {
+        guard let req = try? makeRequest(path: "/api/me") else { return false }
+        do {
+            let (_, response) = try await session.data(for: req)
+            return ((response as? HTTPURLResponse)?.statusCode ?? 0) < 400
+        } catch {
+            return false
+        }
+    }
+
+    func coverURL(itemId: String) -> URL? {
+        guard !auth.serverURL.isEmpty else { return nil }
+        var comps = URLComponents(string: auth.serverURL + "/api/items/\(itemId)/cover")
+        comps?.queryItems = [URLQueryItem(name: "token", value: auth.token)]
+        return comps?.url
+    }
+
+    func audioFileURL(itemId: String, ino: String) -> URL? {
+        var comps = URLComponents(string: auth.serverURL + "/api/items/\(itemId)/file/\(ino)")
+        comps?.queryItems = [URLQueryItem(name: "token", value: auth.token)]
+        return comps?.url
+    }
+
+    var bearerHeader: [String: String] { ["Authorization": "Bearer \(auth.token)"] }
+}

ABS Client iOS/ABS Client iOS/Services/AppState.swift

@@ -0,0 +1,224 @@
+import Foundation
+import Observation
+
+@Observable
+@MainActor
+final class AppState {
+    let auth: AuthStore
+    let client: ABSClient
+    let network: NetworkMonitor
+    let downloads: DownloadManager
+    let sync: ProgressSyncManager
+    let player: PlayerEngine
+
+    var currentItem: LibraryItem?
+    var isPreparingPlayback: Bool = false
+
+    /// Map: PlaybackProgress.syncKey -> PlaybackProgress (server-known progress).
+    /// Used to show progress bars on covers in the library views.
+    var progressCache: [String: PlaybackProgress] = [:]
+
+    private var syncTimer: Timer?
+    private var lastReportedSecond: Double = -10
+
+    init() {
+        let auth = AuthStore()
+        let client = ABSClient(auth: auth)
+        self.auth = auth
+        self.client = client
+        self.network = NetworkMonitor()
+        self.downloads = DownloadManager(client: client)
+        self.sync = ProgressSyncManager(client: client)
+        self.player = PlayerEngine()
+    }
+
+    func bootstrap() async {
+        auth.restoreSession()
+        network.start { [weak self] online in
+            guard let self else { return }
+            if online {
+                Task { [weak self] in
+                    await self?.sync.drain()
+                    await self?.refreshProgressCache()
+                }
+            }
+        }
+        if auth.isLoggedIn {
+            let ok = await client.validateToken()
+            if !ok {
+                auth.logout()
+            } else {
+                await sync.drain()
+                await refreshProgressCache()
+            }
+        }
+    }
+
+    /// Pulls the entire progress map from the server (via /api/me).
+    func refreshProgressCache() async {
+        guard network.isOnline, auth.isLoggedIn else { return }
+        do {
+            let all = try await client.fetchAllProgress()
+            progressCache = Dictionary(all.map { ($0.syncKey, $0) }, uniquingKeysWith: { _, new in new })
+        } catch {
+            // non-fatal
+        }
+    }
+
+    /// Local update for the cache while we're actively playing.
+    func cacheProgress(itemId: String, episodeId: String?, currentTime: Double, duration: Double, isFinished: Bool) {
+        let p = PlaybackProgress(
+            itemId: itemId, episodeId: episodeId,
+            currentTime: currentTime, duration: duration,
+            isFinished: isFinished, updatedAt: Date()
+        )
+        progressCache[p.syncKey] = p
+    }
+
+    func progress(for item: LibraryItem) -> PlaybackProgress? {
+        progressCache[item.syncKey]
+    }
+
+    func progressFraction(itemId: String, episodeId: String? = nil) -> Double {
+        let key = episodeId.map { "\(itemId)|\($0)" } ?? itemId
+        guard let p = progressCache[key], p.duration > 0 else { return 0 }
+        if p.isFinished { return 1.0 }
+        return min(1, max(0, p.currentTime / p.duration))
+    }
+
+    func play(item: LibraryItem) async {
+        if currentItem?.id == item.id, currentItem?.episodeId == item.episodeId, player.isReady {
+            player.play()
+            return
+        }
+        stopPlayback(reportFinal: true)
+        isPreparingPlayback = true
+        defer { isPreparingPlayback = false }
+
+        var workItem = item
+        // Only fetch detail for books with empty audioFiles (podcast episodes
+        // arrive with their single audioFile already populated by the caller).
+        if !workItem.isPodcast && workItem.audioFiles.isEmpty && network.isOnline {
+            let alreadyDownloaded = downloads.isDownloaded(downloadKey: item.downloadKey)
+            if !alreadyDownloaded, let detail = try? await client.fetchItemDetail(itemId: item.id) {
+                workItem = detail
+            }
+        }
+
+        var startAt: Double = 0
+        if network.isOnline {
+            if let p = try? await client.fetchProgress(itemId: item.id, episodeId: workItem.episodeId) {
+                // Replaying a finished item (or one with progress essentially at the end)
+                // should start from the beginning, not drop the user at the last few seconds.
+                let nearEnd = p.duration > 0 && p.currentTime >= p.duration - 10
+                if !p.isFinished && !nearEnd {
+                    startAt = p.currentTime
+                }
+            }
+        }
+
+        currentItem = workItem
+        player.load(item: workItem, client: client, downloads: downloads, startAt: startAt)
+        if player.errorMessage == nil {
+            player.play()
+            startSyncTimer()
+        }
+    }
+
+    /// Convenience for podcast episodes.
+    func play(podcast: LibraryItem, episode: PodcastEpisode) async {
+        var synthetic = LibraryItem(
+            id: podcast.id,
+            title: episode.title,
+            author: podcast.title,
+            durationSeconds: episode.durationSeconds > 0 ? episode.durationSeconds : episode.audioFile.durationSeconds,
+            audioFiles: [episode.audioFile]
+        )
+        synthetic.mediaType = "podcast"
+        synthetic.episodeId = episode.id
+        await play(item: synthetic)
+    }
+
+    func stopPlayback(reportFinal: Bool = true) {
+        if reportFinal { reportProgress(force: true) }
+        syncTimer?.invalidate()
+        syncTimer = nil
+        player.teardown()
+        currentItem = nil
+        lastReportedSecond = -10
+    }
+
+    func togglePlay() {
+        guard currentItem != nil else { return }
+        player.togglePlay()
+        if !player.isPlaying { reportProgress(force: true) }
+    }
+
+    func skip(by seconds: Double) {
+        guard currentItem != nil else { return }
+        player.skip(by: seconds)
+        reportProgress(force: true)
+    }
+
+    func seekAbsolute(_ target: Double) {
+        guard currentItem != nil else { return }
+        player.seekAbsolute(target)
+        reportProgress(force: true)
+    }
+
+    func setRate(_ newRate: Float) {
+        player.setRate(newRate)
+    }
+
+    private func startSyncTimer() {
+        syncTimer?.invalidate()
+        let timer = Timer.scheduledTimer(withTimeInterval: 5.0, repeats: true) { _ in
+            Task { @MainActor [weak self] in
+                self?.reportProgress(force: false)
+            }
+        }
+        RunLoop.main.add(timer, forMode: .common)
+        syncTimer = timer
+    }
+
+    private func reportProgress(force: Bool) {
+        guard let item = currentItem else { return }
+        let t = player.absoluteCurrentTime
+        let d = player.totalDuration
+        guard d > 0 else { return }
+        if !force && abs(t - lastReportedSecond) < 3 { return }
+        lastReportedSecond = t
+        let finished = (d - t) < 30
+
+        cacheProgress(
+            itemId: item.id,
+            episodeId: item.episodeId,
+            currentTime: t,
+            duration: d,
+            isFinished: finished
+        )
+
+        Task {
+            await sync.report(
+                itemId: item.id,
+                episodeId: item.episodeId,
+                currentTime: t,
+                duration: d,
+                isFinished: finished,
+                isOnline: network.isOnline
+            )
+        }
+    }
+}
+
+extension LibraryItem {
+    /// Matches PlaybackProgress.syncKey for cache lookups.
+    var syncKey: String {
+        if let episodeId { return "\(id)|\(episodeId)" }
+        return id
+    }
+
+    /// The DownloadManager keys downloads by this composite identifier,
+    /// allowing the same podcast item to host multiple per-episode downloads.
+    var downloadKey: String { syncKey }
+}

ABS Client iOS/ABS Client iOS/Services/AuthStore.swift

@@ -0,0 +1,94 @@
+import Foundation
+import Observation
+
+enum AuthError: LocalizedError {
+    case invalidURL
+    case badResponse(Int)
+    case noToken
+    case unknown(String)
+
+    var errorDescription: String? {
+        switch self {
+        case .invalidURL: return "Ungültige Server-URL."
+        case .badResponse(let code): return "Server antwortete mit Status \(code)."
+        case .noToken: return "Login fehlgeschlagen: kein Token erhalten."
+        case .unknown(let msg): return msg
+        }
+    }
+}
+
+@Observable
+@MainActor
+final class AuthStore {
+    var isLoggedIn: Bool = false
+    var serverURL: String = ""
+    var username: String = ""
+    var token: String = ""
+    var errorMessage: String?
+
+    func restoreSession() {
+        guard let creds = KeychainStore.load() else { return }
+        self.serverURL = creds.serverURL
+        self.username = creds.username
+        self.token = creds.token
+        self.isLoggedIn = true
+    }
+
+    func login(serverURL rawURL: String, username: String, password: String, remember: Bool) async {
+        errorMessage = nil
+        let normalized = Self.normalizeURL(rawURL)
+        guard let url = URL(string: normalized + "/login") else {
+            errorMessage = AuthError.invalidURL.errorDescription
+            return
+        }
+        var request = URLRequest(url: url)
+        request.httpMethod = "POST"
+        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
+        let body = ["username": username, "password": password]
+        request.httpBody = try? JSONEncoder().encode(body)
+
+        do {
+            let (data, response) = try await URLSession.shared.data(for: request)
+            guard let http = response as? HTTPURLResponse else {
+                errorMessage = "Keine HTTP-Antwort vom Server."
+                return
+            }
+            guard (200..<300).contains(http.statusCode) else {
+                errorMessage = AuthError.badResponse(http.statusCode).errorDescription
+                return
+            }
+            let decoded = try JSONDecoder().decode(LoginResponseDTO.self, from: data)
+            self.serverURL = normalized
+            self.username = decoded.user.username ?? username
+            self.token = decoded.user.token
+            self.isLoggedIn = true
+
+            if remember {
+                try? KeychainStore.save(StoredCredentials(
+                    serverURL: normalized,
+                    username: self.username,
+                    token: self.token
+                ))
+            } else {
+                KeychainStore.delete()
+            }
+        } catch {
+            errorMessage = "Login fehlgeschlagen: \(error.localizedDescription)"
+        }
+    }
+
+    func logout() {
+        KeychainStore.delete()
+        token = ""
+        isLoggedIn = false
+    }
+
+    static func normalizeURL(_ raw: String) -> String {
+        var s = raw.trimmingCharacters(in: .whitespacesAndNewlines)
+        while s.hasSuffix("/") { s.removeLast() }
+        if !s.lowercased().hasPrefix("http://") && !s.lowercased().hasPrefix("https://") {
+            s = "https://" + s
+        }
+        return s
+    }
+}

ABS Client iOS/ABS Client iOS/Services/DownloadManager.swift

@@ -0,0 +1,259 @@
+import Foundation
+import Observation
+
+struct DownloadedTrack: Codable, Hashable {
+    let ino: String
+    let filename: String
+    let localPath: String  // relative to AppPaths.downloadsDirectory
+    let durationSeconds: Double
+
+    enum CodingKeys: String, CodingKey {
+        case ino, filename, localPath, durationSeconds
+    }
+
+    init(ino: String, filename: String, localPath: String, durationSeconds: Double) {
+        self.ino = ino
+        self.filename = filename
+        self.localPath = localPath
+        self.durationSeconds = durationSeconds
+    }
+
+    init(from decoder: Decoder) throws {
+        let c = try decoder.container(keyedBy: CodingKeys.self)
+        ino = try c.decode(String.self, forKey: .ino)
+        filename = try c.decode(String.self, forKey: .filename)
+        localPath = try c.decode(String.self, forKey: .localPath)
+        durationSeconds = try c.decodeIfPresent(Double.self, forKey: .durationSeconds) ?? 0
+    }
+}
+
+struct DownloadedItem: Codable, Hashable {
+    let itemId: String
+    var episodeId: String?
+    let title: String
+    let author: String
+    let durationSeconds: Double
+    let tracks: [DownloadedTrack]
+
+    enum CodingKeys: String, CodingKey {
+        case itemId, episodeId, title, author, durationSeconds, tracks
+    }
+
+    init(itemId: String, episodeId: String? = nil, title: String, author: String, durationSeconds: Double, tracks: [DownloadedTrack]) {
+        self.itemId = itemId
+        self.episodeId = episodeId
+        self.title = title
+        self.author = author
+        self.durationSeconds = durationSeconds
+        self.tracks = tracks
+    }
+
+    init(from decoder: Decoder) throws {
+        let c = try decoder.container(keyedBy: CodingKeys.self)
+        itemId = try c.decode(String.self, forKey: .itemId)
+        episodeId = try c.decodeIfPresent(String.self, forKey: .episodeId)
+        title = try c.decode(String.self, forKey: .title)
+        author = try c.decode(String.self, forKey: .author)
+        durationSeconds = try c.decode(Double.self, forKey: .durationSeconds)
+        tracks = try c.decode([DownloadedTrack].self, forKey: .tracks)
+    }
+
+    var downloadKey: String {
+        if let episodeId { return "\(itemId)|\(episodeId)" }
+        return itemId
+    }
+}
+
+@Observable
+@MainActor
+final class DownloadManager {
+    private let client: ABSClient
+    /// Keyed by downloadKey (itemId or "itemId|episodeId").
+    private(set) var states: [String: DownloadState] = [:]
+    private(set) var downloadedItems: [String: DownloadedItem] = [:]
+
+    private var indexFile: URL { AppPaths.supportDirectory.appendingPathComponent("downloads-index.json") }
+    private var activeTasks: [String: Task<Void, Never>] = [:]
+
+    init(client: ABSClient) {
+        self.client = client
+        try? FileManager.default.createDirectory(at: AppPaths.downloadsDirectory, withIntermediateDirectories: true)
+        loadIndex()
+    }
+
+    func state(for downloadKey: String) -> DownloadState {
+        states[downloadKey] ?? .notDownloaded
+    }
+
+    func isDownloaded(downloadKey: String) -> Bool {
+        if case .downloaded = state(for: downloadKey) { return true }
+        return false
+    }
+
+    func localTrackURLs(for downloadKey: String) -> [URL]? {
+        guard let item = downloadedItems[downloadKey] else { return nil }
+        return item.tracks.map { AppPaths.downloadsDirectory.appendingPathComponent($0.localPath) }
+    }
+
+    /// Downloads a book (whole audioFiles list) or a podcast episode (single audioFile).
+    /// For a podcast episode pass the synthetic LibraryItem that the AppState builds
+    /// (item.id == podcastItemId, item.episodeId == episodeId, audioFiles == [episode.audioFile]).
+    func startDownload(item: LibraryItem) {
+        let key = item.downloadKey
+        guard activeTasks[key] == nil else { return }
+        states[key] = .downloading(progress: 0)
+
+        let task = Task { @MainActor [weak self] in
+            guard let self else { return }
+            var workItem = item
+
+            // Books may arrive with empty audioFiles (list endpoint omits them).
+            // Episodes always arrive populated, since AppState builds the synthetic item.
+            if !workItem.isPodcast && workItem.audioFiles.isEmpty {
+                do {
+                    workItem = try await self.client.fetchItemDetail(itemId: item.id)
+                } catch {
+                    self.states[key] = .failed(message: "Detail konnte nicht geladen werden: \(error.localizedDescription)")
+                    self.activeTasks[key] = nil
+                    return
+                }
+            }
+            if workItem.audioFiles.isEmpty {
+                self.states[key] = .failed(message: "Keine herunterladbaren Audiodateien gefunden.")
+                self.activeTasks[key] = nil
+                return
+            }
+            await self.performDownload(workItem: workItem, downloadKey: key)
+            self.activeTasks[key] = nil
+        }
+        activeTasks[key] = task
+    }
+
+    func cancel(downloadKey: String) {
+        activeTasks[downloadKey]?.cancel()
+        activeTasks[downloadKey] = nil
+        states[downloadKey] = .notDownloaded
+    }
+
+    func delete(downloadKey: String) {
+        cancel(downloadKey: downloadKey)
+        if let item = downloadedItems[downloadKey] {
+            let dir = directoryURL(itemId: item.itemId, episodeId: item.episodeId)
+            try? FileManager.default.removeItem(at: dir)
+            // If this was an episode and the podcast's parent directory is now empty, clean it up too.
+            if item.episodeId != nil {
+                let parent = AppPaths.downloadsDirectory.appendingPathComponent(item.itemId)
+                if let contents = try? FileManager.default.contentsOfDirectory(atPath: parent.path), contents.isEmpty {
+                    try? FileManager.default.removeItem(at: parent)
+                }
+            }
+        }
+        downloadedItems.removeValue(forKey: downloadKey)
+        states[downloadKey] = .notDownloaded
+        persistIndex()
+    }
+
+    private func directoryURL(itemId: String, episodeId: String?) -> URL {
+        var dir = AppPaths.downloadsDirectory.appendingPathComponent(itemId, isDirectory: true)
+        if let episodeId {
+            dir = dir.appendingPathComponent(episodeId, isDirectory: true)
+        }
+        return dir
+    }
+
+    private func relativePath(itemId: String, episodeId: String?, fileName: String) -> String {
+        if let episodeId { return "\(itemId)/\(episodeId)/\(fileName)" }
+        return "\(itemId)/\(fileName)"
+    }
+
+    private func performDownload(workItem: LibraryItem, downloadKey: String) async {
+        let itemDir = directoryURL(itemId: workItem.id, episodeId: workItem.episodeId)
+        do {
+            try FileManager.default.createDirectory(at: itemDir, withIntermediateDirectories: true)
+        } catch {
+            states[downloadKey] = .failed(message: error.localizedDescription)
+            return
+        }
+
+        var tracks: [DownloadedTrack] = []
+        let total = max(workItem.audioFiles.count, 1)
+
+        for (idx, file) in workItem.audioFiles.enumerated() {
+            if Task.isCancelled {
+                states[downloadKey] = .notDownloaded
+                return
+            }
+            guard let url = client.audioFileURL(itemId: workItem.id, ino: file.ino) else { continue }
+            var request = URLRequest(url: url)
+            for (k, v) in client.bearerHeader { request.setValue(v, forHTTPHeaderField: k) }
+
+            do {
+                let (tempURL, response) = try await URLSession.shared.download(for: request)
+                if let http = response as? HTTPURLResponse, !(200..<300).contains(http.statusCode) {
+                    states[downloadKey] = .failed(message: "HTTP \(http.statusCode) bei Datei \(file.filename)")
+                    try? FileManager.default.removeItem(at: tempURL)
+                    return
+                }
+                let ext = file.ext.isEmpty ? "mp3" : file.ext
+                let destName = "\(String(format: "%03d", idx))-\(file.ino).\(ext)"
+                let dest = itemDir.appendingPathComponent(destName)
+                try? FileManager.default.removeItem(at: dest)
+                try FileManager.default.moveItem(at: tempURL, to: dest)
+                tracks.append(DownloadedTrack(
+                    ino: file.ino,
+                    filename: file.filename,
+                    localPath: relativePath(itemId: workItem.id, episodeId: workItem.episodeId, fileName: destName),
+                    durationSeconds: file.durationSeconds
+                ))
+                states[downloadKey] = .downloading(progress: Double(idx + 1) / Double(total))
+            } catch {
+                states[downloadKey] = .failed(message: error.localizedDescription)
+                return
+            }
+        }
+
+        let downloaded = DownloadedItem(
+            itemId: workItem.id,
+            episodeId: workItem.episodeId,
+            title: workItem.title,
+            author: workItem.author,
+            durationSeconds: workItem.durationSeconds,
+            tracks: tracks
+        )
+        downloadedItems[downloadKey] = downloaded
+        states[downloadKey] = .downloaded
+        persistIndex()
+    }
+
+    private func loadIndex() {
+        guard let data = try? Data(contentsOf: indexFile),
+              let decoded = try? JSONDecoder().decode([String: DownloadedItem].self, from: data) else { return }
+        // Re-key by current downloadKey (handles both legacy itemId-only keys and new composite keys).
+        var rekeyed: [String: DownloadedItem] = [:]
+        for (_, item) in decoded {
+            if item.tracks.isEmpty { continue }
+            rekeyed[item.downloadKey] = item
+        }
+        downloadedItems = rekeyed
+        for k in rekeyed.keys {
+            states[k] = .downloaded
+        }
+        // Clean up phantom folders.
+        for (oldKey, item) in decoded where item.tracks.isEmpty {
+            let dir = AppPaths.downloadsDirectory.appendingPathComponent(oldKey)
+            try? FileManager.default.removeItem(at: dir)
+        }
+        if rekeyed.count != decoded.count {
+            persistIndex()
+        }
+    }
+
+    private func persistIndex() {
+        do {
+            let data = try JSONEncoder().encode(downloadedItems)
+            try data.write(to: indexFile, options: .atomic)
+        } catch {
+            // non-fatal
+        }
+    }
+}

ABS Client iOS/ABS Client iOS/Services/KeychainStore.swift

@@ -0,0 +1,59 @@
+import Foundation
+import Security
+
+struct StoredCredentials: Codable {
+    let serverURL: String
+    let username: String
+    let token: String
+}
+
+enum KeychainError: Error {
+    case osStatus(OSStatus)
+    case encodingFailed
+}
+
+enum KeychainStore {
+    private static let service = "com.local.Audiobookshelf-swift.auth"
+    private static let account = "primary"
+
+    static func save(_ creds: StoredCredentials) throws {
+        let data = try JSONEncoder().encode(creds)
+
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: account,
+        ]
+        SecItemDelete(query as CFDictionary)
+
+        var attributes = query
+        attributes[kSecValueData as String] = data
+        attributes[kSecAttrAccessible as String] = kSecAttrAccessibleAfterFirstUnlock
+
+        let status = SecItemAdd(attributes as CFDictionary, nil)
+        guard status == errSecSuccess else { throw KeychainError.osStatus(status) }
+    }
+
+    static func load() -> StoredCredentials? {
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: account,
+            kSecReturnData as String: true,
+            kSecMatchLimit as String: kSecMatchLimitOne,
+        ]
+        var item: CFTypeRef?
+        let status = SecItemCopyMatching(query as CFDictionary, &item)
+        guard status == errSecSuccess, let data = item as? Data else { return nil }
+        return try? JSONDecoder().decode(StoredCredentials.self, from: data)
+    }
+
+    static func delete() {
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: account,
+        ]
+        SecItemDelete(query as CFDictionary)
+    }
+}

ABS Client iOS/ABS Client iOS/Services/NetworkMonitor.swift

@@ -0,0 +1,31 @@
+import Foundation
+import Network
+import Observation
+
+@Observable
+@MainActor
+final class NetworkMonitor {
+    var isOnline: Bool = true
+
+    private let monitor = NWPathMonitor()
+    private let queue = DispatchQueue(label: "NetworkMonitor")
+
+    func start(onChange: @escaping @MainActor (Bool) -> Void) {
+        monitor.pathUpdateHandler = { [weak self] path in
+            let online = path.status == .satisfied
+            Task { @MainActor [weak self] in
+                guard let self else { return }
+                let previous = self.isOnline
+                self.isOnline = online
+                if previous != online {
+                    onChange(online)
+                }
+            }
+        }
+        monitor.start(queue: queue)
+    }
+
+    func stop() {
+        monitor.cancel()
+    }
+}

ABS Client iOS/ABS Client iOS/Services/PlayerEngine.swift

@@ -0,0 +1,336 @@
+import Foundation
+import AVFoundation
+import MediaPlayer
+import Observation
+
+#if canImport(UIKit)
+import UIKit
+private typealias PlayerArtworkImage = UIImage
+#else
+import AppKit
+private typealias PlayerArtworkImage = NSImage
+#endif
+
+@Observable
+@MainActor
+final class PlayerEngine {
+    var isPlaying: Bool = false
+    var absoluteCurrentTime: Double = 0
+    var totalDuration: Double = 0
+    var rate: Float = 1.0
+    var isReady: Bool = false
+    var errorMessage: String?
+
+    private var player: AVQueuePlayer?
+    private var trackDurations: [Double] = []
+    private var trackPlayerItems: [AVPlayerItem] = []
+    private var currentTrackIndex: Int = 0
+    private var timeObserver: Any?
+    private var endObservers: [NSObjectProtocol] = []
+    private var isSeeking: Bool = false
+
+    var itemId: String?
+
+    // Now-playing metadata that travels with the current item.
+    private var currentTitle: String = ""
+    private var currentAuthor: String = ""
+    private var currentCoverURL: URL?
+    private var remoteCommandsConfigured: Bool = false
+
+    nonisolated init() {}
+
+    func load(item: LibraryItem, client: ABSClient, downloads: DownloadManager, startAt absoluteTime: Double) {
+        teardown()
+        self.itemId = item.id
+        self.errorMessage = nil
+
+        let useLocal = downloads.isDownloaded(downloadKey: item.downloadKey)
+        let urls: [URL]
+
+        if useLocal, let localURLs = downloads.localTrackURLs(for: item.downloadKey), !localURLs.isEmpty {
+            urls = localURLs
+            trackDurations = (0..<localURLs.count).map { idx in
+                idx < item.audioFiles.count ? item.audioFiles[idx].durationSeconds : 0
+            }
+            if trackDurations.allSatisfy({ $0 == 0 }) {
+                trackDurations = [item.durationSeconds]
+            }
+        } else {
+            guard !item.audioFiles.isEmpty else {
+                errorMessage = "Dieses Hörbuch enthält keine abspielbaren Audiodateien."
+                return
+            }
+            urls = item.audioFiles.compactMap { client.audioFileURL(itemId: item.id, ino: $0.ino) }
+            trackDurations = item.audioFiles.map { $0.durationSeconds }
+        }
+
+        totalDuration = trackDurations.reduce(0, +)
+
+        trackPlayerItems = urls.map { AVPlayerItem(url: $0) }
+
+        let queue = AVQueuePlayer(items: trackPlayerItems)
+        queue.rate = rate
+        self.player = queue
+
+        let center = NotificationCenter.default
+        for (idx, playerItem) in trackPlayerItems.enumerated() {
+            let token = center.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: playerItem, queue: .main) { [weak self] _ in
+                Task { @MainActor [weak self] in
+                    self?.handleTrackEnd(finishedIndex: idx)
+                }
+            }
+            endObservers.append(token)
+        }
+
+        seekAbsolute(absoluteTime)
+
+        timeObserver = queue.addPeriodicTimeObserver(
+            forInterval: CMTime(seconds: 0.5, preferredTimescale: 600),
+            queue: .main
+        ) { [weak self] _ in
+            Task { @MainActor [weak self] in
+                self?.refreshAbsoluteTime()
+            }
+        }
+
+        currentTitle = item.title
+        currentAuthor = item.author
+        currentCoverURL = client.coverURL(itemId: item.id)
+
+        configureRemoteCommandsIfNeeded()
+        updateNowPlayingInfo()
+        fetchAndAttachArtwork()
+
+        isReady = true
+    }
+
+    func play() {
+        player?.play()
+        player?.rate = rate
+        isPlaying = true
+        updateNowPlayingInfo()
+    }
+
+    func pause() {
+        player?.pause()
+        isPlaying = false
+        updateNowPlayingInfo()
+    }
+
+    func togglePlay() {
+        isPlaying ? pause() : play()
+    }
+
+    func setRate(_ newRate: Float) {
+        rate = newRate
+        if isPlaying { player?.rate = newRate }
+        updateNowPlayingInfo()
+    }
+
+    func skip(by seconds: Double) {
+        seekAbsolute(absoluteCurrentTime + seconds)
+    }
+
+    func seekAbsolute(_ target: Double) {
+        let clamped = max(0, min(target, max(totalDuration - 0.5, 0)))
+        var remaining = clamped
+        var trackIndex = 0
+        for (idx, dur) in trackDurations.enumerated() {
+            if remaining <= dur || idx == trackDurations.count - 1 {
+                trackIndex = idx
+                break
+            }
+            remaining -= dur
+        }
+        switchToTrack(index: trackIndex)
+        absoluteCurrentTime = clamped
+        isSeeking = true
+        let cmTime = CMTime(seconds: max(0, remaining), preferredTimescale: 600)
+        player?.currentItem?.seek(to: cmTime, toleranceBefore: .zero, toleranceAfter: .zero) { [weak self] _ in
+            Task { @MainActor [weak self] in
+                self?.isSeeking = false
+                self?.refreshAbsoluteTime()
+                self?.updateNowPlayingInfo()
+            }
+        }
+    }
+
+    private func switchToTrack(index: Int) {
+        guard index < trackPlayerItems.count, let player else { return }
+        if index == currentTrackIndex, player.currentItem === trackPlayerItems[index] { return }
+
+        let wasPlaying = isPlaying
+        player.removeAllItems()
+        for i in index..<trackPlayerItems.count {
+            let it = trackPlayerItems[i]
+            it.seek(to: .zero, completionHandler: nil)
+            if player.canInsert(it, after: nil) {
+                player.insert(it, after: nil)
+            }
+        }
+        currentTrackIndex = index
+        if wasPlaying { player.play(); player.rate = rate }
+    }
+
+    private func handleTrackEnd(finishedIndex: Int) {
+        if finishedIndex < trackDurations.count - 1 {
+            currentTrackIndex = finishedIndex + 1
+        } else {
+            isPlaying = false
+            updateNowPlayingInfo()
+        }
+    }
+
+    private func refreshAbsoluteTime() {
+        guard let player, let current = player.currentItem else { return }
+        if isSeeking { return }
+        if let idx = trackPlayerItems.firstIndex(where: { $0 === current }) {
+            currentTrackIndex = idx
+        }
+        let trackTime = current.currentTime().seconds
+        let prior = trackDurations.prefix(currentTrackIndex).reduce(0, +)
+        let absolute = prior + (trackTime.isFinite ? trackTime : 0)
+        // AVPlayer can report an item duration slightly longer than the metadata we have.
+        // Clamp the visible time so the scrubber/labels never exceed totalDuration.
+        let cap = totalDuration > 0 ? totalDuration : absolute
+        absoluteCurrentTime = max(0, min(absolute, cap))
+        let wasPlaying = isPlaying
+        isPlaying = player.timeControlStatus == .playing
+        if wasPlaying != isPlaying { updateNowPlayingInfo() }
+    }
+
+    func teardown() {
+        if let token = timeObserver { player?.removeTimeObserver(token) }
+        timeObserver = nil
+        for obs in endObservers { NotificationCenter.default.removeObserver(obs) }
+        endObservers.removeAll()
+        player?.pause()
+        player?.removeAllItems()
+        player = nil
+        trackPlayerItems.removeAll()
+        trackDurations.removeAll()
+        isPlaying = false
+        isReady = false
+        absoluteCurrentTime = 0
+        totalDuration = 0
+        currentTrackIndex = 0
+        itemId = nil
+        errorMessage = nil
+        isSeeking = false
+        currentTitle = ""
+        currentAuthor = ""
+        currentCoverURL = nil
+        clearNowPlayingInfo()
+    }
+
+    // MARK: - Now-playing / remote commands
+
+    private func configureRemoteCommandsIfNeeded() {
+        guard !remoteCommandsConfigured else { return }
+        remoteCommandsConfigured = true
+
+        let center = MPRemoteCommandCenter.shared()
+
+        center.playCommand.addTarget { [weak self] _ in
+            Task { @MainActor in self?.play() }
+            return .success
+        }
+        center.pauseCommand.addTarget { [weak self] _ in
+            Task { @MainActor in self?.pause() }
+            return .success
+        }
+        center.togglePlayPauseCommand.addTarget { [weak self] _ in
+            Task { @MainActor in self?.togglePlay() }
+            return .success
+        }
+        applyRemoteSkipInterval(seconds: Self.currentSkipSeconds())
+        center.skipForwardCommand.addTarget { [weak self] _ in
+            let s = Double(Self.currentSkipSeconds())
+            Task { @MainActor in self?.skip(by: s) }
+            return .success
+        }
+        center.skipBackwardCommand.addTarget { [weak self] _ in
+            let s = Double(Self.currentSkipSeconds())
+            Task { @MainActor in self?.skip(by: -s) }
+            return .success
+        }
+        // Keep the lock-screen icon in sync with the user's preference.
+        NotificationCenter.default.addObserver(
+            forName: UserDefaults.didChangeNotification, object: nil, queue: .main
+        ) { [weak self] _ in
+            Task { @MainActor [weak self] in
+                self?.applyRemoteSkipInterval(seconds: Self.currentSkipSeconds())
+            }
+        }
+        center.changePlaybackPositionCommand.addTarget { [weak self] event in
+            guard let posEvent = event as? MPChangePlaybackPositionCommandEvent else {
+                return .commandFailed
+            }
+            let target = posEvent.positionTime
+            Task { @MainActor in self?.seekAbsolute(target) }
+            return .success
+        }
+        center.changePlaybackRateCommand.supportedPlaybackRates = [0.75, 1.0, 1.25, 1.5, 1.75, 2.0]
+        center.changePlaybackRateCommand.addTarget { [weak self] event in
+            guard let rateEvent = event as? MPChangePlaybackRateCommandEvent else { return .commandFailed }
+            Task { @MainActor in self?.setRate(rateEvent.playbackRate) }
+            return .success
+        }
+    }
+
+    private func updateNowPlayingInfo() {
+        guard itemId != nil else {
+            clearNowPlayingInfo()
+            return
+        }
+        var info: [String: Any] = [
+            MPMediaItemPropertyTitle: currentTitle,
+            MPMediaItemPropertyArtist: currentAuthor,
+            MPMediaItemPropertyPlaybackDuration: totalDuration,
+            MPNowPlayingInfoPropertyElapsedPlaybackTime: absoluteCurrentTime,
+            MPNowPlayingInfoPropertyPlaybackRate: isPlaying ? Double(rate) : 0.0,
+            MPNowPlayingInfoPropertyDefaultPlaybackRate: 1.0,
+            MPNowPlayingInfoPropertyMediaType: MPNowPlayingInfoMediaType.audio.rawValue,
+        ]
+        // Preserve artwork across updates so we don't blank the lock-screen image.
+        if let existing = MPNowPlayingInfoCenter.default().nowPlayingInfo,
+           let art = existing[MPMediaItemPropertyArtwork] {
+            info[MPMediaItemPropertyArtwork] = art
+        }
+        MPNowPlayingInfoCenter.default().nowPlayingInfo = info
+    }
+
+    private func fetchAndAttachArtwork() {
+        guard let url = currentCoverURL else { return }
+        Task.detached {
+            do {
+                let (data, _) = try await URLSession.shared.data(from: url)
+                guard let img = PlayerArtworkImage(data: data) else { return }
+                let artwork = MPMediaItemArtwork(boundsSize: img.size) { _ in img }
+                await MainActor.run { [weak self] in
+                    // Drop the result if the user has since switched items.
+                    guard let self, self.currentCoverURL == url else { return }
+                    var info = MPNowPlayingInfoCenter.default().nowPlayingInfo ?? [:]
+                    info[MPMediaItemPropertyArtwork] = artwork
+                    MPNowPlayingInfoCenter.default().nowPlayingInfo = info
+                }
+            } catch { }
+        }
+    }
+
+    private func clearNowPlayingInfo() {
+        MPNowPlayingInfoCenter.default().nowPlayingInfo = nil
+    }
+
+    private func applyRemoteSkipInterval(seconds: Int) {
+        let center = MPRemoteCommandCenter.shared()
+        center.skipForwardCommand.preferredIntervals = [NSNumber(value: seconds)]
+        center.skipBackwardCommand.preferredIntervals = [NSNumber(value: seconds)]
+    }
+
+    /// Reads the user-configured skip duration; defaults to 30s when unset.
+    static func currentSkipSeconds() -> Int {
+        let raw = UserDefaults.standard.integer(forKey: "skipDurationSeconds")
+        return raw > 0 ? raw : 30
+    }
+}

ABS Client iOS/ABS Client iOS/Services/ProgressSyncManager.swift

@@ -0,0 +1,94 @@
+import Foundation
+import Observation
+
+@Observable
+@MainActor
+final class ProgressSyncManager {
+    private let client: ABSClient
+    private(set) var queuedCount: Int = 0
+    private(set) var lastSyncError: String?
+
+    /// Latest progress per itemId, persisted to disk.
+    private var queue: [String: PlaybackProgress] = [:]
+
+    private let queueFile: URL
+
+    init(client: ABSClient) {
+        self.client = client
+        let dir = AppPaths.supportDirectory
+        try? FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
+        self.queueFile = dir.appendingPathComponent("progress-queue.json")
+        loadQueue()
+    }
+
+    func report(itemId: String, episodeId: String? = nil, currentTime: Double, duration: Double, isFinished: Bool, isOnline: Bool) async {
+        let progress = PlaybackProgress(
+            itemId: itemId,
+            episodeId: episodeId,
+            currentTime: currentTime,
+            duration: duration,
+            isFinished: isFinished,
+            updatedAt: Date()
+        )
+        let key = progress.syncKey
+
+        if isOnline {
+            do {
+                try await client.saveProgress(progress)
+                queue.removeValue(forKey: key)
+                persist()
+                lastSyncError = nil
+                return
+            } catch {
+                lastSyncError = error.localizedDescription
+            }
+        }
+
+        queue[key] = progress
+        persist()
+    }
+
+    func drain() async {
+        guard !queue.isEmpty else { return }
+        let snapshot = queue
+        for (id, progress) in snapshot {
+            do {
+                try await client.saveProgress(progress)
+                queue.removeValue(forKey: id)
+            } catch {
+                lastSyncError = error.localizedDescription
+                break
+            }
+        }
+        persist()
+    }
+
+    private func loadQueue() {
+        guard let data = try? Data(contentsOf: queueFile),
+              let decoded = try? JSONDecoder().decode([String: PlaybackProgress].self, from: data) else { return }
+        queue = decoded
+        queuedCount = decoded.count
+    }
+
+    private func persist() {
+        queuedCount = queue.count
+        do {
+            let data = try JSONEncoder().encode(queue)
+            try data.write(to: queueFile, options: .atomic)
+        } catch {
+            lastSyncError = "Queue konnte nicht gespeichert werden: \(error.localizedDescription)"
+        }
+    }
+}
+
+enum AppPaths {
+    static var supportDirectory: URL {
+        let base = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).first
+            ?? URL(fileURLWithPath: NSHomeDirectory()).appendingPathComponent("Library/Application Support")
+        return base.appendingPathComponent("AudiobookshelfClient", isDirectory: true)
+    }
+
+    static var downloadsDirectory: URL {
+        supportDirectory.appendingPathComponent("downloads", isDirectory: true)
+    }
+}

ABS Client iOS/ABS Client iOS/Views/ContentView.swift

@@ -0,0 +1,13 @@
+import SwiftUI
+
+struct ContentView: View {
+    @Environment(AppState.self) private var app
+
+    var body: some View {
+        if app.auth.isLoggedIn {
+            MainView()
+        } else {
+            LoginView()
+        }
+    }
+}

ABS Client iOS/ABS Client iOS/Views/LibraryGridView.swift

@@ -0,0 +1,25 @@
+import SwiftUI
+
+struct LibraryGridView: View {
+    let items: [LibraryItem]
+    var onRefresh: (() async -> Void)? = nil
+    let onSelect: (LibraryItem) -> Void
+
+    private let columns = [GridItem(.adaptive(minimum: 150), spacing: 16)]
+
+    var body: some View {
+        ScrollView {
+            LazyVGrid(columns: columns, spacing: 18) {
+                ForEach(items) { item in
+                    LibraryItemCell(item: item)
+                        .contentShape(Rectangle())
+                        .onTapGesture { onSelect(item) }
+                }
+            }
+            .padding(16)
+        }
+        .refreshable {
+            await onRefresh?()
+        }
+    }
+}

ABS Client iOS/ABS Client iOS/Views/LibraryItemCell.swift

@@ -0,0 +1,155 @@
+import SwiftUI
+
+struct LibraryItemCell: View {
+    @Environment(AppState.self) private var app
+    let item: LibraryItem
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            ZStack(alignment: .bottom) {
+                ZStack(alignment: .topTrailing) {
+                    cover
+                    downloadBadge
+                        .padding(6)
+                }
+                CoverProgressBar(fraction: app.progressFraction(itemId: item.id, episodeId: item.episodeId))
+                    .padding(.horizontal, 6)
+                    .padding(.bottom, 6)
+            }
+            Text(item.title)
+                .font(.subheadline).bold()
+                .lineLimit(2, reservesSpace: true)
+                .multilineTextAlignment(.leading)
+            Text(item.author)
+                .font(.caption)
+                .foregroundStyle(.secondary)
+                .lineLimit(1, reservesSpace: true)
+        }
+        .contextMenu {
+            downloadMenuItems
+        }
+    }
+
+    private var cover: some View {
+        Group {
+            if let url = app.client.coverURL(itemId: item.id) {
+                AsyncImage(url: url) { phase in
+                    switch phase {
+                    case .empty:
+                        Rectangle().fill(.quaternary)
+                            .overlay(ProgressView().controlSize(.small))
+                    case .success(let img):
+                        img.resizable().aspectRatio(contentMode: .fill)
+                    case .failure:
+                        Rectangle().fill(.quaternary)
+                            .overlay(Image(systemName: "book.closed").foregroundStyle(.secondary))
+                    @unknown default:
+                        Rectangle().fill(.quaternary)
+                    }
+                }
+            } else {
+                Rectangle().fill(.quaternary)
+            }
+        }
+        .aspectRatio(1, contentMode: .fit)
+        .clipShape(RoundedRectangle(cornerRadius: 8))
+    }
+
+    @ViewBuilder
+    private var downloadBadge: some View {
+        let state = app.downloads.state(for: item.downloadKey)
+        switch state {
+        case .downloaded:
+            Image(systemName: "checkmark.circle.fill")
+                .foregroundStyle(.white, .green)
+                .font(.title3)
+                .shadow(radius: 2)
+        case .downloading(let p):
+            DownloadProgressRing(progress: p)
+        case .failed:
+            Image(systemName: "exclamationmark.circle.fill")
+                .foregroundStyle(.white, .red)
+                .font(.title3)
+                .shadow(radius: 2)
+        case .notDownloaded:
+            EmptyView()
+        }
+    }
+
+    @ViewBuilder
+    private var downloadMenuItems: some View {
+        let key = item.downloadKey
+        let state = app.downloads.state(for: key)
+        if item.isPodcastContainer {
+            Text("Episoden zum Download in der Podcast-Ansicht auswählen")
+        } else {
+            switch state {
+            case .notDownloaded, .failed:
+                Button {
+                    app.downloads.startDownload(item: item)
+                } label: {
+                    Label("Für Offline herunterladen", systemImage: "arrow.down.circle")
+                }
+            case .downloading:
+                Button {
+                    app.downloads.cancel(downloadKey: key)
+                } label: {
+                    Label("Download abbrechen", systemImage: "xmark.circle")
+                }
+            case .downloaded:
+                Button(role: .destructive) {
+                    app.downloads.delete(downloadKey: key)
+                } label: {
+                    Label("Heruntergeladene Dateien löschen", systemImage: "trash")
+                }
+            }
+        }
+    }
+}
+
+/// Green progress bar drawn at the bottom of a cover. Hidden when no progress.
+struct CoverProgressBar: View {
+    let fraction: Double
+
+    var body: some View {
+        if fraction > 0 {
+            GeometryReader { geo in
+                ZStack(alignment: .leading) {
+                    RoundedRectangle(cornerRadius: 2, style: .continuous)
+                        .fill(Color.black.opacity(0.55))
+                        .frame(height: 4)
+                    RoundedRectangle(cornerRadius: 2, style: .continuous)
+                        .fill(Color.green)
+                        .frame(width: max(2, geo.size.width * fraction), height: 4)
+                }
+            }
+            .frame(height: 4)
+            .shadow(color: .black.opacity(0.35), radius: 1, y: 1)
+        }
+    }
+}
+
+struct DownloadProgressRing: View {
+    let progress: Double
+
+    var body: some View {
+        ZStack {
+            Circle()
+                .fill(Color.black.opacity(0.75))
+            Circle()
+                .stroke(Color.white.opacity(0.25), lineWidth: 3)
+                .padding(4)
+            Circle()
+                .trim(from: 0, to: max(0.03, min(progress, 1)))
+                .stroke(Color.white, style: StrokeStyle(lineWidth: 3, lineCap: .round))
+                .rotationEffect(.degrees(-90))
+                .padding(4)
+                .animation(.easeInOut(duration: 0.25), value: progress)
+            Image(systemName: "arrow.down")
+                .font(.system(size: 12, weight: .bold))
+                .foregroundStyle(.white)
+        }
+        .frame(width: 28, height: 28)
+        .shadow(color: .black.opacity(0.4), radius: 3, x: 0, y: 1)
+    }
+}

ABS Client iOS/ABS Client iOS/Views/LibraryListView.swift

@@ -0,0 +1,136 @@
+import SwiftUI
+
+enum LibraryLayout: String, CaseIterable, Identifiable {
+    case grid
+    case list
+
+    var id: String { rawValue }
+    var label: String { self == .grid ? "Kachelansicht" : "Listenansicht" }
+    var systemImage: String { self == .grid ? "square.grid.2x2" : "list.bullet" }
+}
+
+struct LibraryListView: View {
+    let items: [LibraryItem]
+    var onRefresh: (() async -> Void)? = nil
+    let onSelect: (LibraryItem) -> Void
+
+    var body: some View {
+        List {
+            ForEach(items) { item in
+                LibraryListRow(item: item)
+                    .contentShape(Rectangle())
+                    .onTapGesture { onSelect(item) }
+                    .listRowInsets(EdgeInsets(top: 8, leading: 16, bottom: 8, trailing: 16))
+            }
+        }
+        .listStyle(.plain)
+        .refreshable {
+            await onRefresh?()
+        }
+    }
+}
+
+struct LibraryListRow: View {
+    @Environment(AppState.self) private var app
+    let item: LibraryItem
+
+    var body: some View {
+        HStack(spacing: 12) {
+            cover
+            VStack(alignment: .leading, spacing: 2) {
+                Text(item.title)
+                    .font(.headline)
+                    .lineLimit(1)
+                Text(item.author)
+                    .font(.subheadline)
+                    .foregroundStyle(.secondary)
+                    .lineLimit(1)
+                let fraction = app.progressFraction(itemId: item.id, episodeId: item.episodeId)
+                if fraction > 0 {
+                    GeometryReader { geo in
+                        ZStack(alignment: .leading) {
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.gray.opacity(0.3))
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.green)
+                                .frame(width: max(2, geo.size.width * fraction))
+                        }
+                    }
+                    .frame(height: 3)
+                    .padding(.top, 2)
+                }
+            }
+            Spacer(minLength: 8)
+            downloadStatus
+        }
+        .contextMenu { downloadMenuItems }
+    }
+
+    private var cover: some View {
+        Group {
+            if let url = app.client.coverURL(itemId: item.id) {
+                AsyncImage(url: url) { phase in
+                    switch phase {
+                    case .empty:
+                        Rectangle().fill(.quaternary)
+                    case .success(let img):
+                        img.resizable().aspectRatio(contentMode: .fill)
+                    case .failure:
+                        Rectangle().fill(.quaternary)
+                            .overlay(Image(systemName: "book.closed").foregroundStyle(.secondary))
+                    @unknown default:
+                        Rectangle().fill(.quaternary)
+                    }
+                }
+            } else {
+                Rectangle().fill(.quaternary)
+            }
+        }
+        .frame(width: 52, height: 52)
+        .clipShape(RoundedRectangle(cornerRadius: 6))
+    }
+
+    @ViewBuilder
+    private var downloadStatus: some View {
+        let state = app.downloads.state(for: item.downloadKey)
+        switch state {
+        case .downloaded:
+            Image(systemName: "checkmark.circle.fill")
+                .foregroundStyle(.white, .green)
+                .font(.title3)
+        case .downloading(let p):
+            DownloadProgressRing(progress: p)
+                .frame(width: 22, height: 22)
+        case .failed:
+            Image(systemName: "exclamationmark.circle.fill")
+                .foregroundStyle(.white, .red)
+                .font(.title3)
+        case .notDownloaded:
+            EmptyView()
+        }
+    }
+
+    @ViewBuilder
+    private var downloadMenuItems: some View {
+        let key = item.downloadKey
+        let state = app.downloads.state(for: key)
+        if item.isPodcastContainer {
+            Text("Episoden zum Download in der Podcast-Ansicht auswählen")
+        } else {
+            switch state {
+            case .notDownloaded, .failed:
+                Button { app.downloads.startDownload(item: item) } label: {
+                    Label("Für Offline herunterladen", systemImage: "arrow.down.circle")
+                }
+            case .downloading:
+                Button { app.downloads.cancel(downloadKey: key) } label: {
+                    Label("Download abbrechen", systemImage: "xmark.circle")
+                }
+            case .downloaded:
+                Button(role: .destructive) {
+                    app.downloads.delete(downloadKey: key)
+                } label: {
+                    Label("Heruntergeladene Dateien löschen", systemImage: "trash")
+                }
+            }
+        }
+    }
+}

ABS Client iOS/ABS Client iOS/Views/LoginView.swift

@@ -0,0 +1,99 @@
+import SwiftUI
+
+struct LoginView: View {
+    @Environment(AppState.self) private var app
+
+    @State private var serverURL: String = ""
+    @State private var username: String = ""
+    @State private var password: String = ""
+    @State private var remember: Bool = true
+    @State private var isLoading: Bool = false
+
+    var body: some View {
+        ScrollView {
+            VStack(spacing: 18) {
+                Spacer(minLength: 32)
+                Image(systemName: "books.vertical.fill")
+                    .font(.system(size: 56))
+                    .foregroundStyle(.tint)
+                Text("ABS Client")
+                    .font(.largeTitle).bold()
+                Text("Verbinde dich mit deinem Audiobookshelf-Server")
+                    .foregroundStyle(.secondary)
+                    .multilineTextAlignment(.center)
+
+                VStack(alignment: .leading, spacing: 14) {
+                    field(label: "Server-URL", placeholder: "https://abs.example.com") {
+                        TextField("https://abs.example.com", text: $serverURL)
+                            .textContentType(.URL)
+                            .keyboardType(.URL)
+                            .textInputAutocapitalization(.never)
+                            .autocorrectionDisabled(true)
+                    }
+                    field(label: "Benutzername", placeholder: "user") {
+                        TextField("user", text: $username)
+                            .textContentType(.username)
+                            .textInputAutocapitalization(.never)
+                            .autocorrectionDisabled(true)
+                    }
+                    field(label: "Passwort", placeholder: "••••••") {
+                        SecureField("••••••", text: $password)
+                            .textContentType(.password)
+                    }
+                    Toggle("Anmeldung merken", isOn: $remember)
+                }
+                .padding()
+                .background(Color(.secondarySystemBackground))
+                .clipShape(RoundedRectangle(cornerRadius: 12))
+
+                if let err = app.auth.errorMessage {
+                    Text(err)
+                        .foregroundStyle(.red)
+                        .font(.callout)
+                        .multilineTextAlignment(.center)
+                }
+
+                Button(action: doLogin) {
+                    if isLoading {
+                        ProgressView()
+                            .frame(maxWidth: .infinity)
+                    } else {
+                        Text("Einloggen")
+                            .frame(maxWidth: .infinity)
+                            .font(.headline)
+                    }
+                }
+                .buttonStyle(.borderedProminent)
+                .controlSize(.large)
+                .disabled(isLoading || serverURL.isEmpty || username.isEmpty || password.isEmpty)
+
+                Spacer(minLength: 32)
+            }
+            .padding(20)
+            .frame(maxWidth: 480)
+            .frame(maxWidth: .infinity)
+        }
+    }
+
+    @ViewBuilder
+    private func field<C: View>(label: String, placeholder: String, @ViewBuilder content: () -> C) -> some View {
+        VStack(alignment: .leading, spacing: 4) {
+            Text(label).font(.subheadline).foregroundStyle(.secondary)
+            content()
+                .textFieldStyle(.roundedBorder)
+        }
+    }
+
+    private func doLogin() {
+        isLoading = true
+        Task {
+            await app.auth.login(
+                serverURL: serverURL,
+                username: username,
+                password: password,
+                remember: remember
+            )
+            isLoading = false
+        }
+    }
+}

ABS Client iOS/ABS Client iOS/Views/MainView.swift

@@ -0,0 +1,231 @@
+import SwiftUI
+
+enum LibraryFilter: Hashable {
+    case library(String)
+    case downloaded
+}
+
+@Observable
+@MainActor
+final class LibraryViewModel {
+    var libraries: [Library] = []
+    var items: [LibraryItem] = []
+    var isLoading: Bool = false
+    var errorMessage: String?
+    var selection: LibraryFilter?
+
+    func loadLibraries(client: ABSClient) async {
+        isLoading = true
+        defer { isLoading = false }
+        do {
+            libraries = try await client.fetchLibraries()
+            if selection == nil, let first = libraries.first {
+                selection = .library(first.id)
+            }
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+    }
+
+    func loadItems(client: ABSClient, downloads: DownloadManager) async {
+        guard let selection else { return }
+        isLoading = true
+        defer { isLoading = false }
+        switch selection {
+        case .library(let id):
+            do {
+                items = try await client.fetchItems(libraryId: id)
+                errorMessage = nil
+            } catch {
+                errorMessage = error.localizedDescription
+            }
+        case .downloaded:
+            items = downloads.downloadedItems.values.map { di in
+                let files: [AudioFile] = di.tracks.enumerated().map { idx, t in
+                    AudioFile(
+                        ino: t.ino,
+                        filename: t.filename,
+                        ext: "",
+                        durationSeconds: t.durationSeconds,
+                        index: idx
+                    )
+                }
+                var li = LibraryItem(
+                    id: di.itemId,
+                    title: di.title,
+                    author: di.author,
+                    durationSeconds: di.durationSeconds,
+                    audioFiles: files
+                )
+                if let episodeId = di.episodeId {
+                    li.mediaType = "podcast"
+                    li.episodeId = episodeId
+                }
+                return li
+            }.sorted { $0.title.localizedCaseInsensitiveCompare($1.title) == .orderedAscending }
+            errorMessage = nil
+        }
+    }
+}
+
+struct MainView: View {
+    @Environment(AppState.self) private var app
+    @State private var vm = LibraryViewModel()
+    @State private var navPath: [LibraryItem] = []
+    @AppStorage("libraryLayout") private var layoutRaw: String = LibraryLayout.grid.rawValue
+    @State private var showSettings: Bool = false
+
+    private var layout: LibraryLayout {
+        LibraryLayout(rawValue: layoutRaw) ?? .grid
+    }
+
+    var body: some View {
+        NavigationStack(path: $navPath) {
+            detail
+                .navigationDestination(for: LibraryItem.self) { podcast in
+                    PodcastDetailView(podcast: podcast)
+                }
+        }
+        .task {
+            await vm.loadLibraries(client: app.client)
+            await vm.loadItems(client: app.client, downloads: app.downloads)
+            await app.refreshProgressCache()
+        }
+        .onChange(of: vm.selection) { _, _ in
+            navPath.removeAll()
+            Task {
+                await vm.loadItems(client: app.client, downloads: app.downloads)
+                await app.refreshProgressCache()
+            }
+        }
+        .safeAreaInset(edge: .bottom, spacing: 0) {
+            PlayerBar()
+                .animation(.easeInOut(duration: 0.2), value: app.currentItem?.id)
+                .animation(.easeInOut(duration: 0.2), value: app.isPreparingPlayback)
+        }
+        .sheet(isPresented: $showSettings) {
+            SettingsView()
+                .environment(app)
+        }
+    }
+
+    private func reloadAll() async {
+        await vm.loadLibraries(client: app.client)
+        await vm.loadItems(client: app.client, downloads: app.downloads)
+        await app.refreshProgressCache()
+    }
+
+    private func handleSelect(_ item: LibraryItem) {
+        if item.isPodcastContainer {
+            navPath.append(item)
+        } else {
+            Task { await app.play(item: item) }
+        }
+    }
+
+    @ViewBuilder
+    private var detail: some View {
+        Group {
+            if vm.isLoading && vm.items.isEmpty {
+                ProgressView("Lade Bibliothek …")
+                    .frame(maxWidth: .infinity, maxHeight: .infinity)
+            } else if let err = vm.errorMessage, vm.items.isEmpty {
+                ContentUnavailableView("Fehler", systemImage: "exclamationmark.triangle", description: Text(err))
+            } else if vm.items.isEmpty {
+                ContentUnavailableView("Keine Hörbücher", systemImage: "books.vertical", description: Text("Diese Auswahl enthält noch keine Hörbücher."))
+            } else {
+                switch layout {
+                case .grid:
+                    LibraryGridView(items: vm.items, onRefresh: reloadAll) { handleSelect($0) }
+                case .list:
+                    LibraryListView(items: vm.items, onRefresh: reloadAll) { handleSelect($0) }
+                }
+            }
+        }
+        .navigationTitle("")
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbar {
+            ToolbarItem(placement: .topBarLeading) {
+                libraryMenu
+            }
+            ToolbarItem(placement: .topBarTrailing) {
+                Menu {
+                    Picker("Ansicht", selection: $layoutRaw) {
+                        ForEach(LibraryLayout.allCases) { l in
+                            Label(l.label, systemImage: l.systemImage).tag(l.rawValue)
+                        }
+                    }
+                    Divider()
+                    Button {
+                        showSettings = true
+                    } label: {
+                        Label("Einstellungen", systemImage: "gearshape")
+                    }
+                    Divider()
+                    statusFooter
+                } label: {
+                    Image(systemName: "ellipsis.circle")
+                }
+            }
+        }
+    }
+
+    private var libraryMenu: some View {
+        Menu {
+            Picker("Bibliothek", selection: Binding(
+                get: { vm.selection ?? .library("") },
+                set: { vm.selection = $0 }
+            )) {
+                Section("Bibliotheken") {
+                    ForEach(vm.libraries) { lib in
+                        Label(lib.name, systemImage: "books.vertical")
+                            .tag(LibraryFilter.library(lib.id))
+                    }
+                }
+                Section("Offline") {
+                    Label("Heruntergeladen", systemImage: "arrow.down.circle.fill")
+                        .tag(LibraryFilter.downloaded)
+                }
+            }
+        } label: {
+            HStack(spacing: 4) {
+                Image(systemName: selectionIcon)
+                Text(currentTitle)
+                    .lineLimit(1)
+                    .font(.headline)
+                Image(systemName: "chevron.down")
+                    .font(.caption)
+            }
+            .foregroundStyle(.primary)
+        }
+    }
+
+    @ViewBuilder
+    private var statusFooter: some View {
+        Section(app.auth.username.isEmpty ? "Status" : "Angemeldet als \(app.auth.username)") {
+            Label(app.network.isOnline ? "Online" : "Offline",
+                  systemImage: app.network.isOnline ? "wifi" : "wifi.slash")
+            if app.sync.queuedCount > 0 {
+                Label("\(app.sync.queuedCount) Synchronisationen wartend", systemImage: "arrow.triangle.2.circlepath")
+            }
+        }
+    }
+
+    private var selectionIcon: String {
+        switch vm.selection {
+        case .downloaded: return "arrow.down.circle.fill"
+        default: return "books.vertical"
+        }
+    }
+
+    private var currentTitle: String {
+        switch vm.selection {
+        case .library(let id):
+            return vm.libraries.first(where: { $0.id == id })?.name ?? "Bibliothek"
+        case .downloaded:
+            return "Heruntergeladen"
+        case .none:
+            return "Bibliothek"
+        }
+    }
+}

ABS Client iOS/ABS Client iOS/Views/PlayerBar.swift

@@ -0,0 +1,207 @@
+import SwiftUI
+
+struct PlayerBar: View {
+    @Environment(AppState.self) private var app
+    @AppStorage("skipDurationSeconds") private var skipSeconds: Int = 30
+    @State private var scrubbing: Bool = false
+    @State private var scrubValue: Double = 0
+    @State private var expanded: Bool = false
+
+    var body: some View {
+        if let item = app.currentItem {
+            VStack(spacing: 0) {
+                Divider()
+                content(item: item)
+                    .padding(.horizontal, 14)
+                    .padding(.top, 8)
+                    .padding(.bottom, 10)
+                    .background(.bar)
+            }
+            .transition(.move(edge: .bottom).combined(with: .opacity))
+        } else if app.isPreparingPlayback {
+            VStack(spacing: 0) {
+                Divider()
+                HStack(spacing: 12) {
+                    ProgressView()
+                    Text("Wiedergabe wird vorbereitet …").font(.subheadline).foregroundStyle(.secondary)
+                    Spacer()
+                }
+                .padding(.horizontal, 16)
+                .padding(.vertical, 14)
+                .background(.bar)
+            }
+        }
+    }
+
+    @ViewBuilder
+    private func content(item: LibraryItem) -> some View {
+        VStack(spacing: 8) {
+            // Header row: cover, title, play/pause, expand
+            HStack(spacing: 12) {
+                cover(item: item)
+                VStack(alignment: .leading, spacing: 2) {
+                    Text(item.title).font(.subheadline).bold().lineLimit(1)
+                    Text(item.author).font(.caption).foregroundStyle(.secondary).lineLimit(1)
+                    if let err = app.player.errorMessage {
+                        Text(err).font(.caption2).foregroundStyle(.red).lineLimit(1)
+                    }
+                }
+                Spacer(minLength: 0)
+                Button { app.togglePlay() } label: {
+                    Image(systemName: app.player.isPlaying ? "pause.circle.fill" : "play.circle.fill")
+                        .font(.system(size: 36))
+                }
+                .buttonStyle(.plain)
+                .disabled(!app.player.isReady)
+                Button {
+                    withAnimation(.easeInOut(duration: 0.2)) { expanded.toggle() }
+                } label: {
+                    Image(systemName: expanded ? "chevron.down" : "chevron.up")
+                        .font(.system(size: 14, weight: .semibold))
+                        .foregroundStyle(.secondary)
+                        .padding(6)
+                }
+                .buttonStyle(.plain)
+            }
+            .contentShape(Rectangle())
+            .onTapGesture {
+                withAnimation(.easeInOut(duration: 0.2)) { expanded.toggle() }
+            }
+
+            if expanded {
+                scrubber
+                HStack(spacing: 24) {
+                    Button { app.skip(by: -Double(skipSeconds)) } label: {
+                        Image(systemName: skipBackImage).font(.system(size: 22))
+                    }
+                    .buttonStyle(.plain)
+                    .disabled(!app.player.isReady)
+
+                    Button { app.skip(by: Double(skipSeconds)) } label: {
+                        Image(systemName: skipForwardImage).font(.system(size: 22))
+                    }
+                    .buttonStyle(.plain)
+                    .disabled(!app.player.isReady)
+
+                    Spacer()
+
+                    rateMenu
+
+                    Button {
+                        app.stopPlayback()
+                    } label: {
+                        Image(systemName: "xmark.circle.fill")
+                            .font(.system(size: 22))
+                            .foregroundStyle(.secondary)
+                    }
+                    .buttonStyle(.plain)
+                }
+                .padding(.top, 2)
+            }
+        }
+    }
+
+    private func cover(item: LibraryItem) -> some View {
+        Group {
+            if let url = app.client.coverURL(itemId: item.id) {
+                AsyncImage(url: url) { phase in
+                    if let img = phase.image {
+                        img.resizable().aspectRatio(contentMode: .fill)
+                    } else {
+                        Color.gray.opacity(0.3)
+                    }
+                }
+            } else {
+                Color.gray.opacity(0.3)
+            }
+        }
+        .frame(width: 44, height: 44)
+        .clipShape(RoundedRectangle(cornerRadius: 6))
+    }
+
+    private var scrubber: some View {
+        VStack(spacing: 2) {
+            Slider(
+                value: Binding(
+                    get: { scrubbing ? scrubValue : app.player.absoluteCurrentTime },
+                    set: { scrubValue = $0; scrubbing = true }
+                ),
+                in: 0...max(app.player.totalDuration, 1),
+                onEditingChanged: { editing in
+                    if !editing {
+                        app.seekAbsolute(scrubValue)
+                        scrubbing = false
+                    }
+                }
+            )
+            .disabled(!app.player.isReady)
+            HStack {
+                Text(formatTime(scrubbing ? scrubValue : app.player.absoluteCurrentTime))
+                    .font(.caption2.monospacedDigit())
+                    .foregroundStyle(.secondary)
+                Spacer()
+                Text(formatTime(app.player.totalDuration))
+                    .font(.caption2.monospacedDigit())
+                    .foregroundStyle(.secondary)
+            }
+        }
+    }
+
+    private var rateMenu: some View {
+        Menu {
+            ForEach([0.75, 1.0, 1.25, 1.5, 1.75, 2.0], id: \.self) { r in
+                Button {
+                    app.setRate(Float(r))
+                } label: {
+                    HStack {
+                        Text(String(format: "%.2g×", r))
+                        if abs(Double(app.player.rate) - r) < 0.01 {
+                            Image(systemName: "checkmark")
+                        }
+                    }
+                }
+            }
+        } label: {
+            Text(String(format: "%.2g×", Double(app.player.rate)))
+                .font(.caption.monospacedDigit())
+                .padding(.horizontal, 10).padding(.vertical, 5)
+                .overlay(Capsule().stroke(Color.secondary.opacity(0.4)))
+        }
+    }
+
+    /// Pick the closest SF Symbol variant for the configured skip interval.
+    /// Falls back to plain arrows when no exact match exists.
+    private var skipForwardImage: String {
+        switch skipSeconds {
+        case ...10: return "goforward.10"
+        case 11...15: return "goforward.15"
+        case 16...30: return "goforward.30"
+        case 31...45: return "goforward.45"
+        case 46...60: return "goforward.60"
+        default: return "goforward.90"
+        }
+    }
+
+    private var skipBackImage: String {
+        switch skipSeconds {
+        case ...10: return "gobackward.10"
+        case 11...15: return "gobackward.15"
+        case 16...30: return "gobackward.30"
+        case 31...45: return "gobackward.45"
+        case 46...60: return "gobackward.60"
+        default: return "gobackward.90"
+        }
+    }
+
+    private func formatTime(_ seconds: Double) -> String {
+        guard seconds.isFinite, seconds >= 0 else { return "0:00" }
+        let total = Int(seconds)
+        let h = total / 3600
+        let m = (total % 3600) / 60
+        let s = total % 60
+        if h > 0 {
+            return String(format: "%d:%02d:%02d", h, m, s)
+        }
+        return String(format: "%d:%02d", m, s)
+    }
+}

ABS Client iOS/ABS Client iOS/Views/PodcastDetailView.swift

@@ -0,0 +1,217 @@
+import SwiftUI
+
+struct PodcastDetailView: View {
+    @Environment(AppState.self) private var app
+    let podcast: LibraryItem
+
+    @State private var episodes: [PodcastEpisode] = []
+    @State private var podcastDetail: LibraryItem?
+    @State private var isLoading: Bool = true
+    @State private var errorMessage: String?
+
+    var body: some View {
+        VStack(spacing: 0) {
+            header
+            Divider()
+            content
+        }
+        .navigationTitle(podcastDetail?.title ?? podcast.title)
+        .navigationBarTitleDisplayMode(.inline)
+        .task { await load() }
+    }
+
+    private var header: some View {
+        HStack(spacing: 14) {
+            if let url = app.client.coverURL(itemId: podcast.id) {
+                AsyncImage(url: url) { phase in
+                    if let img = phase.image { img.resizable().aspectRatio(contentMode: .fill) }
+                    else { Color.gray.opacity(0.3) }
+                }
+                .frame(width: 72, height: 72)
+                .clipShape(RoundedRectangle(cornerRadius: 6))
+            }
+            VStack(alignment: .leading, spacing: 4) {
+                Text(podcast.title).font(.headline).lineLimit(2)
+                Text(podcast.author).font(.subheadline).foregroundStyle(.secondary).lineLimit(1)
+                if !episodes.isEmpty {
+                    Text("\(episodes.count) Folge\(episodes.count == 1 ? "" : "n")")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                }
+            }
+            Spacer()
+        }
+        .padding(16)
+    }
+
+    @ViewBuilder
+    private var content: some View {
+        if isLoading {
+            ProgressView("Lade Folgen …")
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
+        } else if let err = errorMessage {
+            ContentUnavailableView("Fehler", systemImage: "exclamationmark.triangle", description: Text(err))
+        } else if episodes.isEmpty {
+            ContentUnavailableView("Keine Folgen", systemImage: "music.note.list", description: Text("Dieser Podcast enthält noch keine Folgen."))
+        } else {
+            List {
+                ForEach(episodes, id: \.id) { ep in
+                    EpisodeRow(podcast: podcastDetail ?? podcast, episode: ep)
+                        .contentShape(Rectangle())
+                        .onTapGesture {
+                            Task { await app.play(podcast: podcastDetail ?? podcast, episode: ep) }
+                        }
+                }
+            }
+            .listStyle(.plain)
+        }
+    }
+
+    private func load() async {
+        isLoading = true
+        do {
+            let (detail, eps) = try await app.client.fetchEpisodes(podcastItemId: podcast.id)
+            podcastDetail = detail
+            episodes = eps
+            errorMessage = nil
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+        isLoading = false
+    }
+}
+
+private struct EpisodeRow: View {
+    @Environment(AppState.self) private var app
+    let podcast: LibraryItem
+    let episode: PodcastEpisode
+
+    private var syntheticItem: LibraryItem {
+        var item = LibraryItem(
+            id: podcast.id,
+            title: episode.title,
+            author: podcast.title,
+            durationSeconds: episode.durationSeconds > 0 ? episode.durationSeconds : episode.audioFile.durationSeconds,
+            audioFiles: [episode.audioFile]
+        )
+        item.mediaType = "podcast"
+        item.episodeId = episode.id
+        return item
+    }
+
+    var body: some View {
+        HStack(alignment: .top, spacing: 12) {
+            Image(systemName: "play.circle.fill")
+                .font(.title)
+                .foregroundStyle(.tint)
+                .frame(width: 28)
+                .padding(.top, 2)
+
+            VStack(alignment: .leading, spacing: 4) {
+                Text(episode.title)
+                    .font(.subheadline).bold()
+                    .lineLimit(2)
+                HStack(spacing: 10) {
+                    if let date = episode.formattedDate {
+                        Label(date, systemImage: "calendar")
+                            .labelStyle(.titleAndIcon)
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+                    if episode.durationSeconds > 0 {
+                        Label(formatDuration(episode.durationSeconds), systemImage: "clock")
+                            .labelStyle(.titleAndIcon)
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                    }
+                }
+                let frac = app.progressFraction(itemId: podcast.id, episodeId: episode.id)
+                if frac > 0 {
+                    GeometryReader { geo in
+                        ZStack(alignment: .leading) {
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.gray.opacity(0.3))
+                            RoundedRectangle(cornerRadius: 1.5).fill(Color.green)
+                                .frame(width: max(2, geo.size.width * frac))
+                        }
+                    }
+                    .frame(height: 3)
+                    .padding(.top, 2)
+                }
+            }
+            Spacer(minLength: 0)
+            downloadButton
+                .padding(.top, 4)
+        }
+        .padding(.vertical, 4)
+        .contextMenu { contextMenuItems }
+    }
+
+    @ViewBuilder
+    private var downloadButton: some View {
+        let key = syntheticItem.downloadKey
+        let state = app.downloads.state(for: key)
+        switch state {
+        case .notDownloaded:
+            Button {
+                app.downloads.startDownload(item: syntheticItem)
+            } label: {
+                Image(systemName: "arrow.down.circle")
+                    .font(.title3)
+                    .foregroundStyle(.secondary)
+            }
+            .buttonStyle(.plain)
+        case .downloading(let p):
+            DownloadProgressRing(progress: p)
+                .frame(width: 22, height: 22)
+                .onTapGesture { app.downloads.cancel(downloadKey: key) }
+        case .downloaded:
+            Image(systemName: "checkmark.circle.fill")
+                .foregroundStyle(.white, .green)
+                .font(.title3)
+        case .failed:
+            Button {
+                app.downloads.startDownload(item: syntheticItem)
+            } label: {
+                Image(systemName: "exclamationmark.arrow.circlepath")
+                    .font(.title3)
+                    .foregroundStyle(.red)
+            }
+            .buttonStyle(.plain)
+        }
+    }
+
+    @ViewBuilder
+    private var contextMenuItems: some View {
+        let key = syntheticItem.downloadKey
+        let state = app.downloads.state(for: key)
+        switch state {
+        case .notDownloaded, .failed:
+            Button {
+                app.downloads.startDownload(item: syntheticItem)
+            } label: {
+                Label("Folge herunterladen", systemImage: "arrow.down.circle")
+            }
+        case .downloading:
+            Button {
+                app.downloads.cancel(downloadKey: key)
+            } label: {
+                Label("Download abbrechen", systemImage: "xmark.circle")
+            }
+        case .downloaded:
+            Button(role: .destructive) {
+                app.downloads.delete(downloadKey: key)
+            } label: {
+                Label("Heruntergeladene Folge löschen", systemImage: "trash")
+            }
+        }
+    }
+
+    private func formatDuration(_ seconds: Double) -> String {
+        guard seconds.isFinite, seconds > 0 else { return "" }
+        let total = Int(seconds)
+        let h = total / 3600
+        let m = (total % 3600) / 60
+        if h > 0 { return "\(h) h \(m) min" }
+        return "\(m) min"
+    }
+}

ABS Client iOS/ABS Client iOS/Views/SettingsView.swift

@@ -0,0 +1,139 @@
+import SwiftUI
+
+struct SettingsView: View {
+    @Environment(AppState.self) private var app
+    @Environment(\.dismiss) private var dismiss
+
+    @AppStorage("skipDurationSeconds") private var skipSeconds: Int = 30
+    @AppStorage("libraryLayout") private var layoutRaw: String = LibraryLayout.grid.rawValue
+    @AppStorage("autoRefreshOnLaunch") private var autoRefreshOnLaunch: Bool = true
+
+    @State private var showLogoutConfirm: Bool = false
+
+    private static let skipOptions: [Int] = [10, 15, 30, 45, 60, 90]
+
+    var body: some View {
+        NavigationStack {
+            Form {
+                connectionSection
+                playbackSection
+                appearanceSection
+                downloadsSection
+                aboutSection
+            }
+            .navigationTitle("Einstellungen")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .topBarTrailing) {
+                    Button("Fertig") { dismiss() }
+                }
+            }
+            .confirmationDialog(
+                "Mit Server abmelden?",
+                isPresented: $showLogoutConfirm,
+                titleVisibility: .visible
+            ) {
+                Button("Abmelden", role: .destructive) {
+                    app.stopPlayback()
+                    app.auth.logout()
+                    dismiss()
+                }
+                Button("Abbrechen", role: .cancel) { }
+            } message: {
+                Text("Du wirst zurück zur Login-Maske geschickt. Heruntergeladene Hörbücher bleiben erhalten.")
+            }
+        }
+    }
+
+    private var connectionSection: some View {
+        Section {
+            LabeledContent("Server") {
+                Text(app.auth.serverURL.isEmpty ? "—" : app.auth.serverURL)
+                    .foregroundStyle(.secondary)
+                    .lineLimit(1)
+                    .truncationMode(.middle)
+            }
+            LabeledContent("Benutzer") {
+                Text(app.auth.username.isEmpty ? "—" : app.auth.username)
+                    .foregroundStyle(.secondary)
+            }
+            HStack(spacing: 8) {
+                Circle()
+                    .fill(app.network.isOnline ? .green : .orange)
+                    .frame(width: 8, height: 8)
+                Text(app.network.isOnline ? "Online" : "Offline")
+                Spacer()
+                if app.sync.queuedCount > 0 {
+                    Text("\(app.sync.queuedCount) wartend")
+                        .foregroundStyle(.secondary)
+                        .font(.subheadline)
+                }
+            }
+            Button(role: .destructive) {
+                showLogoutConfirm = true
+            } label: {
+                Label("Abmelden / Server wechseln", systemImage: "rectangle.portrait.and.arrow.right")
+            }
+        } header: {
+            Text("Verbindung")
+        } footer: {
+            Text("Abmelden setzt die gespeicherten Anmeldedaten zurück. Heruntergeladene Inhalte bleiben.")
+        }
+    }
+
+    private var playbackSection: some View {
+        Section {
+            Picker("Sprung-Dauer", selection: $skipSeconds) {
+                ForEach(Self.skipOptions, id: \.self) { sec in
+                    Text("\(sec) s").tag(sec)
+                }
+            }
+        } header: {
+            Text("Wiedergabe")
+        } footer: {
+            Text("Gilt für die Skip-Knöpfe in der Player-Leiste und auf dem Sperrbildschirm.")
+        }
+    }
+
+    private var appearanceSection: some View {
+        Section {
+            Picker("Bibliotheks-Ansicht", selection: $layoutRaw) {
+                ForEach(LibraryLayout.allCases) { l in
+                    Label(l.label, systemImage: l.systemImage).tag(l.rawValue)
+                }
+            }
+            Toggle("Beim Start automatisch aktualisieren", isOn: $autoRefreshOnLaunch)
+        } header: {
+            Text("Darstellung")
+        }
+    }
+
+    private var downloadsSection: some View {
+        Section {
+            LabeledContent("Heruntergeladen") {
+                Text("\(app.downloads.downloadedItems.count) Einträge")
+                    .foregroundStyle(.secondary)
+            }
+        } header: {
+            Text("Downloads")
+        } footer: {
+            Text("Heruntergeladene Hörbücher und Folgen können einzeln in der Bibliothek über das Kontextmenü gelöscht werden.")
+        }
+    }
+
+    private var aboutSection: some View {
+        Section {
+            LabeledContent("Version") {
+                Text(appVersion).foregroundStyle(.secondary)
+            }
+        } header: {
+            Text("Über")
+        }
+    }
+
+    private var appVersion: String {
+        let v = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "?"
+        let b = Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion") as? String ?? "?"
+        return "\(v) (\(b))"
+    }
+}

Audiobookshelf swift/ABSService.swift

@@ -1,98 +0,0 @@
-import Foundation
-
-class ABSService: ObservableObject {
-    static let shared = ABSService()
-    
-    func fetchLibraries(serverURL: String, token: String) async throws -> [Library] {
-        let url = URL(string: "\(serverURL)/api/libraries")!
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        let (data, _) = try await URLSession.shared.data(for: request)
-        let response = try JSONDecoder().decode(LibrariesResponse.self, from: data)
-        return response.libraries
-    }
-    
-    func fetchBooks(serverURL: String, token: String, libraryId: String) async throws -> [AudiobookItem] {
-        let url = URL(string: "\(serverURL)/api/libraries/\(libraryId)/items?limit=100")!
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        let (data, _) = try await URLSession.shared.data(for: request)
-        let response = try JSONDecoder().decode(LibraryItemsResponse.self, from: data)
-        return response.results.compactMap { item in
-            AudiobookItem(
-                id: item.id,
-                title: item.media.metadata.title ?? "Unbekannt",
-                author: item.media.metadata.authorName ?? "Unbekannt",
-                coverURL: item.media.coverPath != nil ? "\(serverURL)/api/items/\(item.id)/cover" : nil,
-                duration: item.media.duration ?? 0,
-                mediaFiles: item.media.audioFiles?.map {
-                    AudiobookItem.MediaFile(ino: $0.ino, name: $0.metadata.filename, path: $0.metadata.path)
-                } ?? []
-            )
-        }
-    }
-    
-    func fetchProgress(serverURL: String, token: String, itemId: String) async throws -> LibraryProgress? {
-        let url = URL(string: "\(serverURL)/api/me/progress/\(itemId)")!
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        let (data, response) = try await URLSession.shared.data(for: request)
-        guard (response as? HTTPURLResponse)?.statusCode == 200 else { return nil }
-        return try? JSONDecoder().decode(LibraryProgress.self, from: data)
-    }
-    
-    func updateProgress(serverURL: String, token: String, itemId: String, currentTime: Double, duration: Double) async {
-        guard let url = URL(string: "\(serverURL)/api/me/progress/\(itemId)") else { return }
-        var request = URLRequest(url: url)
-        request.httpMethod = "PATCH"
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
-        
-        let body: [String: Any] = [
-            "currentTime": currentTime,
-            "duration": duration,
-            "isFinished": currentTime >= duration - 5
-        ]
-        request.httpBody = try? JSONSerialization.data(withJSONObject: body)
-        try? await URLSession.shared.data(for: request)
-    }
-}
-
-// MARK: - API Response Models
-struct LibrariesResponse: Codable {
-    let libraries: [Library]
-}
-
-struct LibraryItemsResponse: Codable {
-    let results: [RawLibraryItem]
-}
-
-struct RawLibraryItem: Codable {
-    let id: String
-    let media: RawMedia
-}
-
-struct RawMedia: Codable {
-    let metadata: RawMetadata
-    let coverPath: String?
-    let duration: Double?
-    let audioFiles: [RawAudioFile]?
-}
-
-struct RawMetadata: Codable {
-    let title: String?
-    let authorName: String?
-}
-
-struct RawAudioFile: Codable {
-    let ino: String
-    let metadata: RawFileMetadata
-}
-
-struct RawFileMetadata: Codable {
-    let filename: String
-    let path: String
-}

Audiobookshelf swift/Audiobookshelf_swiftApp.swift

@@ -1,17 +0,0 @@
-//
-//  Audiobookshelf_swiftApp.swift
-//  Audiobookshelf swift
-//
-//  Created by Guido Schmit on 13.05.2026.
-//
-
-import SwiftUI
-
-@main
-struct Audiobookshelf_swiftApp: App {
-    var body: some Scene {
-        WindowGroup {
-            ContentView()
-        }
-    }
-}

Audiobookshelf swift/ContentView.swift

@@ -1,24 +0,0 @@
-//
-//  ContentView.swift
-//  Audiobookshelf swift
-//
-//  Created by Guido Schmit on 13.05.2026.
-//
-
-import SwiftUI
-
-struct ContentView: View {
-    var body: some View {
-        VStack {
-            Image(systemName: "globe")
-                .imageScale(.large)
-                .foregroundStyle(.tint)
-            Text("Hello, world!")
-        }
-        .padding()
-    }
-}
-
-#Preview {
-    ContentView()
-}

Audiobookshelf swift/LibraryView.swift

@@ -1,72 +0,0 @@
-//
-//  LibraryView.swift
-//  Audiobookshelf swift
-//
-//  Created by Guido Schmit on 13.05.2026.
-//
-
-
-import SwiftUI
-
-struct LibraryView: View {
-    @ObservedObject var authManager: AuthManager
-    @State private var books: [AudiobookItem] = []
-    @State private var isLoading = true
-    @State private var errorMessage = ""
-    
-    var body: some View {
-        NavigationView {
-            Group {
-                if isLoading {
-                    ProgressView("Lädt Bibliothek...")
-                } else if !errorMessage.isEmpty {
-                    Text(errorMessage).foregroundColor(.red)
-                } else {
-                    ScrollView {
-                        LazyVGrid(columns: [GridItem(.adaptive(minimum: 150))], spacing: 16) {
-                            ForEach(books) { book in
-                                BookCard(book: book, authManager: authManager)
-                            }
-                        }
-                        .padding()
-                    }
-                }
-            }
-            .navigationTitle("Meine Bibliothek")
-            .toolbar {
-                Button("Logout") {
-                    authManager.logout()
-                }
-            }
-        }
-        .onAppear { loadBooks() }
-    }
-    
-    func loadBooks() {
-        guard let serverURL = authManager.serverURL,
-              let token = authManager.token else { return }
-        
-        // Erst Libraries laden, dann Bücher
-        let url = URL(string: "\(serverURL)/api/libraries")!
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        URLSession.shared.dataTask(with: request) { data, _, error in
-            guard let data = data else { return }
-            if let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
-               let libraries = json["libraries"] as? [[String: Any]],
-               let firstLib = libraries.first,
-               let libId = firstLib["id"] as? String {
-                loadBooksFromLibrary(libId: libId, serverURL: serverURL, token: token)
-            }
-        }.resume()
-    }
-    
-    func loadBooksFromLibrary(libId: String, serverURL: String, token: String) {
-        let url = URL(string: "\(serverURL)/api/libraries/\(libId)/items")!
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        URLSession.shared.dataTask(with: request) { data, _, _ in
-            guard let data = data else { return }
-            if let json = try? JSON

Audiobookshelf swift/LoginResponse.swift

@@ -1,46 +0,0 @@
-import Foundation
-
-// MARK: - Auth
-struct LoginResponse: Codable {
-    let user: UserResponse
-}
-
-struct UserResponse: Codable {
-    let token: String
-    let id: String
-}
-
-// MARK: - Library
-struct Library: Codable, Identifiable {
-    let id: String
-    let name: String
-}
-
-// MARK: - AudiobookItem
-struct AudiobookItem: Identifiable {
-    let id: String
-    let title: String
-    let author: String
-    let coverURL: String?
-    let duration: Double
-    let mediaFiles: [MediaFile]
-    
-    struct MediaFile {
-        let ino: String
-        let name: String
-        let path: String
-    }
-}
-
-// MARK: - Progress
-struct LibraryProgress: Codable {
-    let currentTime: Double
-    let duration: Double?
-    let isFinished: Bool?
-    
-    enum CodingKeys: String, CodingKey {
-        case currentTime
-        case duration
-        case isFinished
-    }
-}

Audiobookshelf swift/PlayerView.swift

@@ -1,215 +0,0 @@
-import SwiftUI
-import AVFoundation
-
-struct PlayerView: View {
-    let book: AudiobookItem
-    @EnvironmentObject var authManager: AuthManager
-    @StateObject private var vm = PlayerViewModel()
-    
-    var body: some View {
-        VStack(spacing: 24) {
-            // Cover
-            if let coverURL = book.coverURL, let url = URL(string: coverURL) {
-                AsyncImage(url: url) { image in
-                    image.resizable().aspectRatio(contentMode: .fit)
-                } placeholder: {
-                    Rectangle().fill(Color.gray.opacity(0.3))
-                        .overlay(Image(systemName: "book.fill").font(.largeTitle).foregroundColor(.gray))
-                }
-                .frame(maxWidth: 280, maxHeight: 280)
-                .cornerRadius(12)
-                .shadow(radius: 8)
-            } else {
-                Rectangle().fill(Color.gray.opacity(0.3))
-                    .frame(width: 280, height: 280)
-                    .cornerRadius(12)
-                    .overlay(Image(systemName: "book.fill").font(.largeTitle).foregroundColor(.gray))
-            }
-            
-            // Titel & Autor
-            VStack(spacing: 4) {
-                Text(book.title)
-                    .font(.title2).bold()
-                    .multilineTextAlignment(.center)
-                Text(book.author)
-                    .font(.subheadline)
-                    .foregroundColor(.secondary)
-            }
-            .padding(.horizontal)
-            
-            // Fortschrittsbalken
-            VStack(spacing: 4) {
-                Slider(value: $vm.currentTime, in: 0...max(vm.duration, 1)) { editing in
-                    if !editing {
-                        vm.seek(to: vm.currentTime)
-                    }
-                }
-                .padding(.horizontal)
-                
-                HStack {
-                    Text(formatTime(vm.currentTime))
-                    Spacer()
-                    Text(formatTime(vm.duration))
-                }
-                .font(.caption)
-                .foregroundColor(.secondary)
-                .padding(.horizontal)
-            }
-            
-            // Steuerung
-            HStack(spacing: 40) {
-                Button(action: { vm.skip(-30) }) {
-                    Image(systemName: "gobackward.30")
-                        .font(.title)
-                }
-                
-                Button(action: { vm.togglePlayPause() }) {
-                    Image(systemName: vm.isPlaying ? "pause.circle.fill" : "play.circle.fill")
-                        .font(.system(size: 64))
-                }
-                
-                Button(action: { vm.skip(30) }) {
-                    Image(systemName: "goforward.30")
-                        .font(.title)
-                }
-            }
-            .foregroundColor(.accentColor)
-            
-            // Wiedergabegeschwindigkeit
-            HStack {
-                Text("Geschwindigkeit:")
-                    .font(.caption)
-                Picker("", selection: $vm.playbackRate) {
-                    Text("0.75x").tag(Float(0.75))
-                    Text("1.0x").tag(Float(1.0))
-                    Text("1.25x").tag(Float(1.25))
-                    Text("1.5x").tag(Float(1.5))
-                    Text("2.0x").tag(Float(2.0))
-                }
-                .pickerStyle(.segmented)
-            }
-            .padding(.horizontal)
-            
-            Spacer()
-        }
-        .padding(.top)
-        .navigationTitle("Player")
-        .navigationBarTitleDisplayMode(.inline)
-        .onAppear {
-            vm.setup(book: book, authManager: authManager)
-        }
-        .onDisappear {
-            vm.saveProgress(authManager: authManager)
-        }
-    }
-    
-    func formatTime(_ seconds: Double) -> String {
-        let s = Int(seconds)
-        return String(format: "%d:%02d:%02d", s/3600, (s%3600)/60, s%60)
-    }
-}
-
-// MARK: - PlayerViewModel
-class PlayerViewModel: ObservableObject {
-    @Published var isPlaying = false
-    @Published var currentTime: Double = 0
-    @Published var duration: Double = 0
-    @Published var playbackRate: Float = 1.0 {
-        didSet { player?.rate = isPlaying ? playbackRate : 0 }
-    }
-    
-    private var player: AVPlayer?
-    private var playerItem: AVPlayerItem?
-    private var timeObserver: Any?
-    private var book: AudiobookItem?
-    private var authManager: AuthManager?
-    
-    func setup(book: AudiobookItem, authManager: AuthManager) {
-        self.book = book
-        self.authManager = authManager
-        
-        guard let serverURL = authManager.serverURL,
-              let token = authManager.token,
-              let firstFile = book.mediaFiles.first else { return }
-        
-        let urlString = "\(serverURL)/api/items/\(book.id)/file/\(firstFile.ino)"
-        guard let url = URL(string: urlString) else { return }
-        
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        let asset = AVURLAsset(url: url, options: ["AVURLAssetHTTPHeaderFieldsKey": ["Authorization": "Bearer \(token)"]])
-        playerItem = AVPlayerItem(asset: asset)
-        player = AVPlayer(playerItem: playerItem)
-        
-        // Duration
-        Task {
-            if let dur = try? await asset.load(.duration) {
-                await MainActor.run {
-                    self.duration = dur.seconds
-                }
-            }
-        }
-        
-        // Fortschritt laden
-        Task {
-            if let progress = try? await ABSService.shared.fetchProgress(
-                serverURL: serverURL, token: token, itemId: book.id) {
-                await MainActor.run {
-                    self.currentTime = progress.currentTime
-                    self.player?.seek(to: CMTime(seconds: progress.currentTime, preferredTimescale: 1000))
-                }
-            }
-        }
-        
-        // Time Observer
-        let interval = CMTime(seconds: 1, preferredTimescale: 1000)
-        timeObserver = player?.addPeriodicTimeObserver(forInterval: interval, queue: .main) { [weak self] time in
-            self?.currentTime = time.seconds
-        }
-    }
-    
-    func togglePlayPause() {
-        guard let player else { return }
-        if isPlaying {
-            player.pause()
-        } else {
-            player.rate = playbackRate
-        }
-        isPlaying.toggle()
-    }
-    
-    func skip(_ seconds: Double) {
-        guard let player else { return }
-        let newTime = max(0, min(currentTime + seconds, duration))
-        player.seek(to: CMTime(seconds: newTime, preferredTimescale: 1000))
-        currentTime = newTime
-    }
-    
-    func seek(to time: Double) {
-        player?.seek(to: CMTime(seconds: time, preferredTimescale: 1000))
-    }
-    
-    func saveProgress(authManager: AuthManager) {
-        guard let book,
-              let serverURL = authManager.serverURL,
-              let token = authManager.token else { return }
-        
-        Task {
-            await ABSService.shared.updateProgress(
-                serverURL: serverURL,
-                token: token,
-                itemId: book.id,
-                currentTime: currentTime,
-                duration: duration
-            )
-        }
-    }
-    
-    deinit {
-        if let timeObserver {
-            player?.removeTimeObserver(timeObserver)
-        }
-        player?.pause()
-    }
-}

Exports/Mac/ABS/ABS Client.app/Contents/Info.plist

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>BuildMachineOSBuild</key>
+	<string>25F71</string>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleDisplayName</key>
+	<string>ABS Client</string>
+	<key>CFBundleExecutable</key>
+	<string>ABS Client</string>
+	<key>CFBundleIconFile</key>
+	<string>AppIcon</string>
+	<key>CFBundleIconName</key>
+	<string>AppIcon</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.local.Audiobookshelf-swift</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>ABS Client</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSupportedPlatforms</key>
+	<array>
+		<string>MacOSX</string>
+	</array>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>DTCompiler</key>
+	<string>com.apple.compilers.llvm.clang.1_0</string>
+	<key>DTPlatformBuild</key>
+	<string>25F70</string>
+	<key>DTPlatformName</key>
+	<string>macosx</string>
+	<key>DTPlatformVersion</key>
+	<string>26.5</string>
+	<key>DTSDKBuild</key>
+	<string>25F70</string>
+	<key>DTSDKName</key>
+	<string>macosx26.5</string>
+	<key>DTXcode</key>
+	<string>2650</string>
+	<key>DTXcodeBuild</key>
+	<string>17F42</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>26.4</string>
+</dict>
+</plist>

Exports/Mac/ABS/ABS Client.app/Contents/PkgInfo

@@ -0,0 +1 @@
+APPL????

Exports/Mac/ABS/ABS Client.app/Contents/_CodeSignature/CodeResources

@@ -0,0 +1,139 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>files</key>
+	<dict>
+		<key>Resources/AppIcon.icns</key>
+		<data>
+		PIslMkIS+dR91jAoGiXhG5ZQxNw=
+		</data>
+		<key>Resources/Assets.car</key>
+		<data>
+		znIIamhkfmvHB0hErsEqUixsQhI=
+		</data>
+	</dict>
+	<key>files2</key>
+	<dict>
+		<key>Resources/AppIcon.icns</key>
+		<dict>
+			<key>hash2</key>
+			<data>
+			UmgGZpb6aN5Xnz7XswrsNpMxnVcQINgSUpIhHWS1GBM=
+			</data>
+		</dict>
+		<key>Resources/Assets.car</key>
+		<dict>
+			<key>hash2</key>
+			<data>
+			HHk6wONib9SlJckhU6DwwijL2pI9JaiC6553U0Novu8=
+			</data>
+		</dict>
+	</dict>
+	<key>rules</key>
+	<dict>
+		<key>^Resources/</key>
+		<true/>
+		<key>^Resources/.*\.lproj/</key>
+		<dict>
+			<key>optional</key>
+			<true/>
+			<key>weight</key>
+			<real>1000</real>
+		</dict>
+		<key>^Resources/.*\.lproj/locversion.plist$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>1100</real>
+		</dict>
+		<key>^Resources/Base\.lproj/</key>
+		<dict>
+			<key>weight</key>
+			<real>1010</real>
+		</dict>
+		<key>^version.plist$</key>
+		<true/>
+	</dict>
+	<key>rules2</key>
+	<dict>
+		<key>.*\.dSYM($|/)</key>
+		<dict>
+			<key>weight</key>
+			<real>11</real>
+		</dict>
+		<key>^(.*/)?\.DS_Store$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>2000</real>
+		</dict>
+		<key>^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/</key>
+		<dict>
+			<key>nested</key>
+			<true/>
+			<key>weight</key>
+			<real>10</real>
+		</dict>
+		<key>^.*</key>
+		<true/>
+		<key>^Info\.plist$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^PkgInfo$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^Resources/</key>
+		<dict>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^Resources/.*\.lproj/</key>
+		<dict>
+			<key>optional</key>
+			<true/>
+			<key>weight</key>
+			<real>1000</real>
+		</dict>
+		<key>^Resources/.*\.lproj/locversion.plist$</key>
+		<dict>
+			<key>omit</key>
+			<true/>
+			<key>weight</key>
+			<real>1100</real>
+		</dict>
+		<key>^Resources/Base\.lproj/</key>
+		<dict>
+			<key>weight</key>
+			<real>1010</real>
+		</dict>
+		<key>^[^/]+$</key>
+		<dict>
+			<key>nested</key>
+			<true/>
+			<key>weight</key>
+			<real>10</real>
+		</dict>
+		<key>^embedded\.provisionprofile$</key>
+		<dict>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+		<key>^version\.plist$</key>
+		<dict>
+			<key>weight</key>
+			<real>20</real>
+		</dict>
+	</dict>
+</dict>
+</plist>

Exports/Mac/dmgmaker.sh

@@ -0,0 +1,9 @@
+create-dmg \                                                                
+  --volname "ABS-Client" \     
+  --window-size 600 400 \
+  --icon-size 100 \
+  --icon "ABS-Client.app" 150 200 \
+  --app-drop-link 450 200 \
+  ~/ABS-Client/Exports/Mac/ABS-Client.dmg \
+  ABS Client.app         
+≈

LibraryView.swift

@@ -1,64 +0,0 @@
-import SwiftUI
-
-struct LibraryView: View {
-    @ObservedObject var authManager: AuthManager
-    @State private var books: [AudiobookItem] = []
-    @State private var isLoading = true
-    @State private var errorMessage = ""
-    
-    var body: some View {
-        NavigationView {
-            Group {
-                if isLoading {
-                    ProgressView("Lädt Bibliothek...")
-                } else if !errorMessage.isEmpty {
-                    Text(errorMessage).foregroundColor(.red)
-                } else {
-                    ScrollView {
-                        LazyVGrid(columns: [GridItem(.adaptive(minimum: 150))], spacing: 16) {
-                            ForEach(books) { book in
-                                BookCard(book: book, authManager: authManager)
-                            }
-                        }
-                        .padding()
-                    }
-                }
-            }
-            .navigationTitle("Meine Bibliothek")
-            .toolbar {
-                Button("Logout") {
-                    authManager.logout()
-                }
-            }
-        }
-        .onAppear { loadBooks() }
-    }
-    
-    func loadBooks() {
-        guard let serverURL = authManager.serverURL,
-              let token = authManager.token else { return }
-        
-        // Erst Libraries laden, dann Bücher
-        let url = URL(string: "\(serverURL)/api/libraries")!
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        URLSession.shared.dataTask(with: request) { data, _, error in
-            guard let data = data else { return }
-            if let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
-               let libraries = json["libraries"] as? [[String: Any]],
-               let firstLib = libraries.first,
-               let libId = firstLib["id"] as? String {
-                loadBooksFromLibrary(libId: libId, serverURL: serverURL, token: token)
-            }
-        }.resume()
-    }
-    
-    func loadBooksFromLibrary(libId: String, serverURL: String, token: String) {
-        let url = URL(string: "\(serverURL)/api/libraries/\(libId)/items")!
-        var request = URLRequest(url: url)
-        request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
-        
-        URLSession.shared.dataTask(with: request) { data, _, _ in
-            guard let data = data else { return }
-            if let json = try? JSON