Regenerate Fastlane docs

- Adds paste button
- Fix autofocus behavior (using UIKit)
- Remove pointless sheet detents

.gitignore

@@ -0,0 +1,6 @@
+/.env
+ios/build/
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots/
+fastlane/test_output/

fastlane/Appfile

@@ -0,0 +1,6 @@
+apple_id("james.magahern@mac.com")
+app_identifier("net.buzzert.QueueCube")
+team_id("DQQH5H6GBD")
+team_name("James Magahern")
+itc_team_id("127764897")
+itc_team_name("James Magahern")

fastlane/Fastfile

@@ -0,0 +1,129 @@
+require "fileutils"
+require "open3"
+require "shellwords"
+require "tempfile"
+
+default_platform(:ios)
+
+BUNDLE_IDENTIFIER = "net.buzzert.QueueCube"
+DEVELOPMENT_TEAM = "DQQH5H6GBD"
+APP_ROOT = File.expand_path("..", File.expand_path(__dir__))
+IOS_PROJECT_DIR = File.join(APP_ROOT, "ios")
+XCODE_PROJECT = File.join(IOS_PROJECT_DIR, "QueueCube.xcodeproj")
+SCHEME = "QueueCube"
+ARCHIVE_PATH = File.join(IOS_PROJECT_DIR, "build", "#{SCHEME}.xcarchive")
+EXPORT_PATH = File.join(IOS_PROJECT_DIR, "build", "upload")
+
+def shell_command(*parts)
+  parts.flatten.map { |part| part.to_s.shellescape }.join(" ")
+end
+
+def archive_path
+  ARCHIVE_PATH
+end
+
+def export_path
+  EXPORT_PATH
+end
+
+def git_output(*args)
+  stdout, stderr, status = Open3.capture3("git", *args, chdir: APP_ROOT)
+  UI.user_error!("git #{args.join(' ')} failed: #{stderr.strip}") unless status.success?
+
+  stdout.strip
+end
+
+def app_version
+  tag = git_output("describe", "--tags", "--abbrev=0")
+  version = tag.sub(/\Av/, "")
+  unless version.match?(/\A\d+(?:\.\d+){0,2}\z/)
+    UI.user_error!("Latest git tag #{tag.inspect} is not a valid App Store version. Use a tag like 1.5.2 or v1.5.2.")
+  end
+
+  version
+end
+
+def build_number
+  git_output("rev-list", "--count", "HEAD")
+end
+
+def upload_export_options
+  <<~PLIST
+    <?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>method</key>
+      <string>app-store-connect</string>
+      <key>signingStyle</key>
+      <string>automatic</string>
+      <key>teamID</key>
+      <string>#{DEVELOPMENT_TEAM}</string>
+      <key>manageAppVersionAndBuildNumber</key>
+      <false/>
+      <key>stripSwiftSymbols</key>
+      <true/>
+      <key>uploadSymbols</key>
+      <true/>
+    </dict>
+    </plist>
+  PLIST
+end
+
+platform :ios do
+  desc "Build QueueCube for iOS and upload the archive to TestFlight"
+  lane :beta do
+    version = app_version
+    build = build_number
+    UI.message("Using QueueCube version #{version} (build #{build}) from git")
+
+    FileUtils.rm_rf(archive_path)
+    FileUtils.rm_rf(export_path)
+
+    Dir.chdir(IOS_PROJECT_DIR) do
+      sh(shell_command(
+        "xcodebuild",
+        "-project", XCODE_PROJECT,
+        "-scheme", SCHEME,
+        "-configuration", "Release",
+        "-destination", "generic/platform=iOS",
+        "-archivePath", archive_path,
+        "-allowProvisioningUpdates",
+        "clean",
+        "archive",
+        "DEVELOPMENT_TEAM=#{DEVELOPMENT_TEAM}",
+        "PRODUCT_BUNDLE_IDENTIFIER=#{BUNDLE_IDENTIFIER}",
+        "MARKETING_VERSION=#{version}",
+        "CURRENT_PROJECT_VERSION=#{build}"
+      ))
+    end
+
+    export_options = Tempfile.new(["queuecube-export-options", ".plist"])
+    export_options.write(upload_export_options)
+    export_options.close
+
+    FileUtils.rm_rf(export_path)
+    Dir.chdir(IOS_PROJECT_DIR) do
+      sh(shell_command(
+        "xcodebuild",
+        "-exportArchive",
+        "-archivePath", archive_path,
+        "-exportPath", export_path,
+        "-exportOptionsPlist", export_options.path,
+        "-allowProvisioningUpdates"
+      ))
+    end
+
+    ipa_path = Dir[File.join(export_path, "*.ipa")].first
+    UI.user_error!("No IPA found in #{export_path}") unless ipa_path
+
+    upload_to_testflight(
+      app_identifier: BUNDLE_IDENTIFIER,
+      ipa: ipa_path,
+      skip_waiting_for_build_processing: true,
+      uses_non_exempt_encryption: false
+    )
+  ensure
+    export_options&.unlink
+  end
+end

fastlane/README.md

@@ -0,0 +1,32 @@
+fastlane documentation
+----
+
+# Installation
+
+Make sure you have the latest version of the Xcode command line tools installed:
+
+```sh
+xcode-select --install
+```
+
+For _fastlane_ installation instructions, see [Installing _fastlane_](https://docs.fastlane.tools/#installing-fastlane)
+
+# Available Actions
+
+## iOS
+
+### ios beta
+
+```sh
+[bundle exec] fastlane ios beta
+```
+
+Build QueueCube for iOS and upload the archive to TestFlight
+
+----
+
+This README.md is auto-generated and will be re-generated every time [_fastlane_](https://fastlane.tools) is run.
+
+More information about _fastlane_ can be found on [fastlane.tools](https://fastlane.tools).
+
+The documentation of _fastlane_ can be found on [docs.fastlane.tools](https://docs.fastlane.tools).

ios/QueueCube.xcodeproj/project.pbxproj

@@ -14,6 +14,7 @@
 		CD8ACBBF2DC5B8F2008BF856 /* Exceptions for "QueueCube" folder in "QueueCube" target */ = {
 			isa = PBXFileSystemSynchronizedBuildFileExceptionSet;
 			membershipExceptions = (
+				App/Entitlements.plist,
 				App/Info.plist,
 			);
 			target = CD4E9B962D7691C20066FC17 /* QueueCube */;
@@ -268,7 +269,7 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 5;
+				CURRENT_PROJECT_VERSION = 13;
 				DEVELOPMENT_TEAM = DQQH5H6GBD;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
@@ -283,7 +284,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.2;
+				MARKETING_VERSION = 1.5.2;
 				PRODUCT_BUNDLE_IDENTIFIER = net.buzzert.QueueCube;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
@@ -304,7 +305,7 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 5;
+				CURRENT_PROJECT_VERSION = 13;
 				DEVELOPMENT_TEAM = DQQH5H6GBD;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
@@ -319,7 +320,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 1.2;
+				MARKETING_VERSION = 1.5.2;
 				PRODUCT_BUNDLE_IDENTIFIER = net.buzzert.QueueCube;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";

ios/QueueCube/Backend/API.swift

@@ -16,9 +16,19 @@ struct MediaItem: Codable
     let current: Bool?
     let playing: Bool?
     let metadata: Metadata?
+    let playbackError: String?
     
     var displayTitle: String {
-        metadata?.title ?? title ?? filename ?? "item \(id)"
+        metadata?.title ?? title ?? displayFilename ?? "item \(id)"
+    }
+    
+    private var displayFilename: String? {
+        guard let filename else { return nil }
+        if let url = URL(string: filename) {
+            return url.lastPathComponent
+        }
+        
+        return filename
     }
     
     // MARK: - Types
@@ -234,8 +244,6 @@ actor API
     private static func notifyError(_ error: any Swift.Error, continuation: AsyncStream<StreamEvent>.Continuation) {
         print("Websocket Error: \(error)")
 
-        let nsError = error as NSError
-
         // Always notify observers of WebSocket errors so reconnection can happen
         // The UI layer can decide whether to show the error to the user
         continuation.yield(.error(.websocketError(error)))
@@ -273,6 +281,7 @@ actor API
             case favoritesUpdate     = "favorites_update"
             case metadataUpdate      = "metadata_update"
             case mpdUpdate           = "mpd_update"
+            case playbackError       = "playback_error"
             
             // Private UI events
             case receivedWebsocketPong

ios/QueueCube/Localizable/Localizable.xcstrings

@@ -104,6 +104,16 @@
         }
       }
     },
+    "DELETE" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Delete"
+          }
+        }
+      }
+    },
     "DISCOVERED" : {
       "localizations" : {
         "en" : {
@@ -247,6 +257,16 @@
     },
     "Nothing here yet." : {
 
+    },
+    "PLAYBACK_ERROR" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Playback Error"
+          }
+        }
+      }
     },
     "PLAYLIST" : {
       "localizations" : {
@@ -360,6 +380,16 @@
         }
       }
     },
+    "Unknown error" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Unknown Error"
+          }
+        }
+      }
+    },
     "URL" : {
       "localizations" : {
         "en" : {

ios/QueueCube/Localizable/Strings.swift

@@ -46,4 +46,6 @@ extension LocalizedStringKey
     static let notPlaying             = LocalizedStringKey("NOT_PLAYING")
     static let url                    = LocalizedStringKey("URL")
     static let title                  = LocalizedStringKey("TITLE")
+    static let playbackError          = LocalizedStringKey("PLAYBACK_ERROR")
+    static let delete                 = LocalizedStringKey("DELETE")
 }

ios/QueueCube/Views/AddMediaView.swift

@@ -10,17 +10,23 @@ import SwiftUI
 struct AddMediaView: View
 {
     @Binding var model: ViewModel
-    @FocusState var fieldFocused: Bool
     
     var body: some View {
         NavigationStack {
             Form {
                 // Add URL
                 Section {
-                    TextField(.addAnyURL, text: $model.fieldContents)
+                    HStack {
+                        AutofocusingTextField(String(localized: "ADD_ANY_URL"), text: $model.fieldContents)
                             .autocapitalization(.none)
                             .autocorrectionDisabled()
-                        .focused($fieldFocused)
+                        
+                        PasteButton(payloadType: String.self) { payload in
+                            guard let contents = payload.first else { return }
+                            model.fieldContents = contents
+                        }
+                        .labelStyle(.iconOnly)
+                    }
                 }
                 
                 if model.supportsSearch {
@@ -35,8 +41,6 @@ struct AddMediaView: View
                     }
                 }
             }
-            .task { fieldFocused = true }
-            .onAppear { model.activeDetent = ViewModel.Detent.collapsed.value }
             .navigationTitle(.addMedia)
             .navigationBarTitleDisplayMode(.inline)
             .toolbar {
@@ -72,21 +76,6 @@ struct AddMediaView: View
         var onSearch: () -> Void    =   { }
         var supportsSearch: Bool = true
         
-        var activeDetent: PresentationDetent = Detent.collapsed.value
-        
-        enum Detent: CaseIterable
-        {
-            case collapsed
-            case expanded
-            
-            var value: PresentationDetent {
-                switch self {
-                    case .collapsed: .height(320.0)
-                    case .expanded: .large
-                }
-            }
-        }
-        
         fileprivate func addButtonTapped() {
             onAdd(fieldContents)
         }
@@ -107,11 +96,8 @@ struct SearchMediaView: View
                 Image(systemName: "magnifyingglass")
                     .foregroundColor(.secondary)
                 
-                TextField(.searchForMedia, text: $searchText)
+                AutofocusingTextField(String(localized: "SEARCH_FOR_MEDIA"), text: $searchText, onSubmit: performSearch)
                     .focused($searchFieldFocused)
-                    .onSubmit {
-                        performSearch()
-                    }
                 
                 if !searchText.isEmpty {
                     Button {
@@ -153,7 +139,6 @@ struct SearchMediaView: View
         .navigationTitle(.searchForMedia)
         .presentationBackground(.regularMaterial)
         .onAppear {
-            model.activeDetent = AddMediaView.ViewModel.Detent.expanded.value
             searchFieldFocused = true
         }
     }

ios/QueueCube/Views/AutofocusingTextField.swift

@@ -0,0 +1,71 @@
+//
+//  AutofocusingTextField.swift
+//  QueueCube
+//
+//  Created by James Magahern on 11/15/25.
+//
+
+import SwiftUI
+import UIKit
+
+/// Stupid: it appears to be impossible to make it so SwiftUI's `.focused(_:)` modifier takes place during the
+/// presentation of a sheet, so this needs to exist just to make sure it's made first responder as soon as it moves to
+/// the view hierarchy.
+struct AutofocusingTextField: UIViewRepresentable
+{
+    let placeholder: String
+    @Binding var text: String
+    var onSubmit: () -> Void = {}
+
+    init(_ placeholder: String, text: Binding<String>, onSubmit: @escaping () -> Void = {}) {
+        self.placeholder = placeholder
+        self._text = text
+        self.onSubmit = onSubmit
+    }
+
+    func makeUIView(context: Context) -> UITextField {
+        let tf = FirstResponderTextField()
+        tf.placeholder = placeholder
+        tf.delegate = context.coordinator
+        tf.returnKeyType = .done
+        tf.setContentHuggingPriority(.defaultHigh, for: .vertical)
+        tf.autocorrectionType = .no
+        tf.autocapitalizationType = .none
+        return tf
+    }
+
+    func updateUIView(_ uiView: UITextField, context: Context) {
+        if uiView.text != text {
+            uiView.text = text
+        }
+        context.coordinator.parent = self   // keep latest onSubmit/text binding
+    }
+
+    func makeCoordinator() -> Coordinator {
+        Coordinator(parent: self)
+    }
+
+    final class Coordinator: NSObject, UITextFieldDelegate {
+        var parent: AutofocusingTextField
+
+        init(parent: AutofocusingTextField) {
+            self.parent = parent
+        }
+
+        func textFieldDidChangeSelection(_ textField: UITextField) {
+            parent.text = textField.text ?? ""
+        }
+
+        func textFieldShouldReturn(_ textField: UITextField) -> Bool {
+            parent.onSubmit()
+            return true
+        }
+    }
+}
+
+final class FirstResponderTextField: UITextField {
+    override func didMoveToSuperview() {
+        super.didMoveToSuperview()
+        becomeFirstResponder()
+    }
+}

ios/QueueCube/Views/ContentView.swift

@@ -29,10 +29,6 @@ struct ContentView: View
             .sheet(isPresented: $model.isAddMediaSheetPresented) {
                 AddMediaView(model: $model.addMediaViewModel)
                     .presentationBackground(.regularMaterial)
-                    .presentationDetents(
-                        Set(AddMediaView.ViewModel.Detent.allCases.map { $0.value }),
-                        selection: $model.addMediaViewModel.activeDetent
-                    )
             }
             .sheet(isPresented: $model.isEditSheetPresented) {
                 EditItemView(model: $model.editMediaViewModel)
@@ -91,7 +87,8 @@ extension ContentView
                         title: mediaItem.displayTitle,
                         filename: mediaItem.filename ?? "<null>",
                         index: idx,
-                        isCurrent: mediaItem.current ?? false
+                        isCurrent: mediaItem.current ?? false,
+                        playbackError: mediaItem.playbackError
                     )
                 }
             }
@@ -104,7 +101,8 @@ extension ContentView
                         id: String(mediaItem.id),
                         title: mediaItem.displayTitle,
                         filename: mediaItem.filename ?? "<null>",
-                        isCurrent: nowPlaying.playingItem?.filename == mediaItem.filename
+                        isCurrent: nowPlaying.playingItem?.filename == mediaItem.filename,
+                        playbackError: mediaItem.playbackError
                     )
                 }
             }
@@ -121,9 +119,15 @@ extension ContentView
                         await clearConnectionErrorIfNecessary()
                         await handle(event: event)
                     case .error(let error):
+                        // Ignore if we're in the bg
+                        guard scenePhase == .active else { break }
+                    
                         // Check if this is a backgrounding error (connection abort)
-                        let nsError = error as NSError
-                        let isBackgroundingError = nsError.code == 53
+                        var isBackgroundingError = false
+                        if case let .websocketError(wsError) = error {
+                            let nsError = wsError as NSError
+                            isBackgroundingError = nsError.code == 53
+                        }
 
                         // Only show connection error to user if it's not a backgrounding error
                         if !isBackgroundingError {
@@ -158,7 +162,8 @@ extension ContentView
             
         case .websocketReconnected: fallthrough
         case .metadataUpdate: fallthrough
-        case .mpdUpdate:
+        case .mpdUpdate: fallthrough
+        case .playbackError:
             await refresh([.playlist, .nowPlaying, .favorites])
 
         case .receivedWebsocketPong:

ios/QueueCube/Views/MainView.swift

@@ -325,18 +325,9 @@ struct ServerSelectionToolbarModifier: ViewModifier
                                 }
                             }
                         }
-                        
-                        #if false
-                        // TODO
-                        Section {
-                            Button(.addServer) {
-                                
-                            }
-                        }
-                        #endif
                     } label: {
                         Label(model.selectedServer?.displayName ?? "Servers", systemImage: "chevron.down")
-                            .labelStyle(.titleAndIcon)
+                            .labelStyle(.titleOnly)
                     }
                     .buttonBorderShape(.capsule)
                     .buttonStyle(.bordered)

ios/QueueCube/Views/NowPlayingView.swift

@@ -41,16 +41,16 @@ struct NowPlayingView: View
                 VStack {
                     if let title = model.title {
                         Text(title)
-                            .font(.title2)
+                            .font(.title3)
                             .lineLimit(1)
                             .bold()
                     }
                     
                     if let subtitle = model.subtitle {
                         Text(subtitle)
-                            .font(.title3)
+                            .font(.subheadline)
                             .foregroundStyle(.secondary)
-                            .lineLimit(1)
+                            .lineLimit(2)
                     }
                     
                     if nothingQueued {

ios/QueueCube/Views/PlaylistView.swift

@@ -14,17 +14,19 @@ struct MediaListItem: Identifiable
     let filename: String
     let index: Int?
     let isCurrent: Bool
+    let playbackError: String?
     
     var id: String {
         _id + filename // temporary: we get duplicate ids from the server sometimes...
     }
     
-    init(id: String, title: String, filename: String, index: Int? = nil, isCurrent: Bool = false) {
+    init(id: String, title: String, filename: String, index: Int? = nil, isCurrent: Bool = false, playbackError: String? = nil) {
         self._id = id
         self.title = title
         self.filename = filename
         self.index = index
         self.isCurrent = isCurrent
+        self.playbackError = playbackError
     }
 }
 
@@ -45,6 +47,7 @@ class MediaListViewModel
     var onQueue:    (MediaListItem) -> Void = { _ in }
     var onEdit:     (MediaListItem) -> Void = { _ in }
     var onFavorite: (MediaListItem) -> Void = { _ in }
+    var onDelete:   (MediaListItem) -> Void = { _ in }
     
     init(mode: MediaListMode) {
         self.mode = mode
@@ -54,6 +57,8 @@ class MediaListViewModel
 struct MediaListView: View
 {
     @Binding var model: MediaListViewModel
+    @State private var errorAlertItem: MediaListItem? = nil
+    @State private var isShowingErrorAlert: Bool = false
 
     var body: some View {
         VStack {
@@ -70,20 +75,29 @@ struct MediaListView: View
                     let state = item.isCurrent ? (model.isPlaying ? MediaItemCell.State.playing : MediaItemCell.State.paused) : .queued
 
                     Button {
+                        if let _ = item.playbackError {
+                            errorAlertItem = item
+                            isShowingErrorAlert = true
+                        } else {
                             switch model.mode {
                             case .playlist:
                                 model.onSeek(item)
                             case .favorites:
                                 model.onPlay(item)
                             }
+                        }
                     } label: {
                         MediaItemCell(
                             title: item.title,
                             subtitle: item.filename,
-                            state: state
+                            state: state,
+                            playbackError: item.playbackError
                         )
                     }
-                    .listRowBackground((model.mode == .playlist && state != .queued) ? Color.accentColor.opacity(0.10) : nil)
+                    .listRowBackground(
+                        item.playbackError != nil ? Color.red.opacity(0.15) :
+                        (model.mode == .playlist && state != .queued ? Color.accentColor.opacity(0.10) : nil)
+                    )
                     .contextMenu {
                         Button(.copyTitle) {
                             UIPasteboard.general.string = item.title
@@ -123,6 +137,20 @@ struct MediaListView: View
                         }
                     }
                 }
+                .alert(.playbackError, isPresented: $isShowingErrorAlert, presenting: errorAlertItem) { item in
+                    Button(.cancel, role: .cancel) {
+                        errorAlertItem = nil
+                        isShowingErrorAlert = false
+                    }
+                    Button(.delete, role: .destructive) {
+                        model.items.removeAll { $0.id == item.id }
+                        model.onDelete(item)
+                        errorAlertItem = nil
+                        isShowingErrorAlert = false
+                    }
+                } message: { item in
+                    Text(item.playbackError ?? "Unknown error")
+                }
             }
         }
     }
@@ -134,26 +162,24 @@ struct MediaItemCell: View
     let title: String
     let subtitle: String
     let state: State
+    let playbackError: String?
 
     var body: some View {
-        let icon: String = switch state {
-            case .queued: "play.fill"
-            case .playing: "speaker.wave.3.fill"
-            case .paused: "speaker.fill"
-        }
-        
         HStack {
-            Image(systemName: icon)
-                .tint(Color.primary)
+            Image(systemName: iconName)
+                .tint(playbackError == nil ? Color.primary : Color.orange)
                 .frame(width: 15.0)
                 .padding(.trailing, 10.0)
             
             VStack(alignment: .leading) {
                 Text(title)
+                    .bold()
+                    .font(.subheadline)
                     .tint(.primary)
                     .lineLimit(1)
                 
                 Text(subtitle)
+                    .font(.caption)
                     .foregroundColor(.secondary)
                     .lineLimit(1)
             }
@@ -161,6 +187,19 @@ struct MediaItemCell: View
             Spacer()
         }
         .padding([.top, .bottom], 4.0)
+        .frame(minHeight: 44.0)
+    }
+    
+    private var iconName: String {
+        if playbackError != nil {
+            return "exclamationmark.triangle.fill"
+        }
+        
+        switch state {
+            case .queued:  return "play.fill"
+            case .playing: return "speaker.wave.3.fill"
+            case .paused:  return "speaker.fill"
+        }
     }
     
     // MARK: - Types
@@ -171,4 +210,3 @@ struct MediaItemCell: View
         case paused
     }
 }
-

web/backend/src/MediaPlayer.ts

@@ -30,6 +30,11 @@ interface PendingCommand {
     reject: (reason: any) => void;
 }
 
+enum ObservedProperty {
+    MediaTitle = 1,
+    Metadata = 2,
+}
+
 enum UserEvent {
     PlaylistUpdate      = "playlist_update",
     NowPlayingUpdate    = "now_playing_update",
@@ -37,6 +42,7 @@ enum UserEvent {
     FavoritesUpdate     = "favorites_update",
     MetadataUpdate      = "metadata_update",
     MPDUpdate           = "mpd_update",
+    PlaybackError       = "playback_error",
 }
 
 export interface Features {
@@ -57,6 +63,11 @@ export class MediaPlayer {
     private dataBuffer: string = '';
     private metadata: Map<string, LinkMetadata> = new Map();
     private bonjourInstance: Bonjour | null = null;
+    private playbackErrors: Map<string, string> = new Map();
+    private currentFile: string | null = null;
+    private lastLoadCandidate: string | null = null;
+    private currentMediaTitle: string | null = null;
+    private currentPlaybackMetadata: Record<string, string> = {};
 
     constructor() {
         this.socket = this.tryRespawnPlayerProcess();
@@ -110,10 +121,9 @@ export class MediaPlayer {
         const socketFilename = Math.random().toString(36).substring(2, 10);
         const socketPath = `/tmp/mpv-${socketFilename}`;
         const enableVideo = process.env.ENABLE_VIDEO || false;
+        const ytdlFormat = process.env.MPV_YTDL_FORMAT;
         const logfilePath = `/tmp/mpv-logfile.txt`;
-
-        console.log("Starting player process (video: " + (enableVideo ? "enabled" : "disabled") + ")");
-        this.playerProcess = spawn("mpv", [
+        const playerArgs = [
             "--video=" + (enableVideo ? "auto" : "no"),
             "--fullscreen",
             "--no-terminal",
@@ -121,25 +131,38 @@ export class MediaPlayer {
             "--input-ipc-server=" + socketPath,
             "--log-file=" + logfilePath,
             "--msg-level=all=v"
-        ]);
+        ];
+
+        if (ytdlFormat) {
+            playerArgs.push("--ytdl-format=" + ytdlFormat);
+        }
+
+        console.log("Starting player process (video: " + (enableVideo ? "enabled" : "disabled") + ")");
+        this.playerProcess = spawn("mpv", playerArgs);
 
         
         let socketReady!: (s: Socket) => void;
-        let socketPromise = new Promise<Socket>(resolve => {
+        let socketFailed!: (reason?: unknown) => void;
+        let socketPromise = new Promise<Socket>((resolve, reject) => {
             socketReady = resolve;
+            socketFailed = reject;
         });
         
         this.playerProcess.on("spawn", () => {
             console.log(`Player process spawned, opening socket @ ${socketPath}`);
-            setTimeout(() => {
-                let socket = this.connectToSocket(socketPath);
-                socketReady(socket);
-            }, 500);
+            this.connectToSocket(socketPath)
+                .then(socket => socketReady(socket))
+                .catch((error: unknown) => {
+                    console.error(`Failed to connect to mpv socket @ ${socketPath}:`, error);
+                    console.log("Continuing without mpv player...");
+                    socketFailed(error);
+                });
         });
 
-        this.playerProcess.on("error", (error) => {
+        this.playerProcess.on("error", (error: unknown) => {
             console.error("Player process error:", error);
             console.log("Continuing without mpv player...");
+            socketFailed(error);
         });
 
         return socketPromise;
@@ -150,10 +173,15 @@ export class MediaPlayer {
             .then((response) => {
                 // Enhance playlist items with metadata
                 const playlist = response.data as PlaylistItem[];
-                return playlist.map((item: PlaylistItem) => ({
+                return playlist.map((item: PlaylistItem) => {
+                    const enhancedItem = {
                         ...item,
-                    metadata: this.metadata.get(item.filename) || {}
-                }));
+                        metadata: this.metadata.get(item.filename) || {},
+                        playbackError: this.playbackErrors.get(item.filename)
+                    };
+
+                    return item.current ? this.withCurrentDynamicTitle(enhancedItem) : enhancedItem;
+                });
             });
     }
 
@@ -162,29 +190,37 @@ export class MediaPlayer {
         const currentlyPlayingSong = playlist.find((item: PlaylistItem) => item.current);
         const fetchMediaTitle = async (): Promise<string | null> => { 
             try {
-                return (await this.writeCommand("get_property", ["media-title"])).data;
+                const mediaTitle = (await this.writeCommand("get_property", ["media-title"])).data;
+                this.currentMediaTitle = typeof mediaTitle === "string" ? mediaTitle : null;
+                return this.currentMediaTitle;
             } catch (err) {
                 return null;
             }
         };
 
+        const mediaTitle = await fetchMediaTitle();
+
         if (currentlyPlayingSong !== undefined) {
+            const dynamicTitle = this.getCurrentDynamicTitle(currentlyPlayingSong);
+            if (dynamicTitle) {
+                return this.withCurrentDynamicTitle(currentlyPlayingSong, dynamicTitle);
+            }
+
             // Use media title if we don't have a title
             if (currentlyPlayingSong.title === undefined && currentlyPlayingSong.metadata?.title === undefined) {
                 return {
                     ...currentlyPlayingSong,
-                    title: await fetchMediaTitle() || currentlyPlayingSong.filename
+                    title: mediaTitle || currentlyPlayingSong.filename
                 };
             }
 
             return currentlyPlayingSong;
         } 
 
-        const mediaTitle = await fetchMediaTitle() || "";
         return {
             id: 0,
-            filename: mediaTitle,
-            title: mediaTitle
+            filename: mediaTitle || "",
+            title: mediaTitle || ""
         };
     }
 
@@ -352,6 +388,8 @@ export class MediaPlayer {
     }
 
     private async loadFile(url: string, mode: string, fetchMetadata: boolean = true, options: string[] = []) {
+        this.lastLoadCandidate = url;
+        this.playbackErrors.delete(url);
         this.modify(UserEvent.PlaylistUpdate, () => this.writeCommand("loadfile", [url, mode, "-1", options.join(',')]));
 
         if (fetchMetadata) {
@@ -390,7 +428,7 @@ export class MediaPlayer {
                 socket.write(commandObject + '\n');
             } catch (e: any) {
                 console.error(`Error writing to socket: ${e}. Trying to respawn.`)
-                this.tryRespawnPlayerProcess();
+                this.socket = this.tryRespawnPlayerProcess();
             }
 
             // Add timeout to prevent hanging promises
@@ -429,12 +467,52 @@ export class MediaPlayer {
         }
     }
 
-    private connectToSocket(path: string): Socket {
-        let socket = new Socket();
-        socket.connect(path);
-        socket.on("data", data => this.receiveData(data.toString()));
+    private connectToSocket(path: string): Promise<Socket> {
+        const retryDelayMs = 100;
+        const maxAttempts = 50;
 
-        return socket;
+        return new Promise((resolve, reject) => {
+            type SocketError = Error & { code?: string };
+
+            const attemptConnection = (attempt: number) => {
+                const socket = new Socket();
+
+                const onError = (error: SocketError) => {
+                    socket.removeAllListeners();
+                    socket.destroy();
+
+                    const shouldRetry = (error.code === "ENOENT" || error.code === "ECONNREFUSED") && attempt < maxAttempts;
+                    if (shouldRetry) {
+                        setTimeout(() => attemptConnection(attempt + 1), retryDelayMs);
+                        return;
+                    }
+
+                    reject(error);
+                };
+
+                socket.once("connect", () => {
+                    socket.removeListener("error", onError);
+                    socket.on("data", (data: unknown) => this.receiveData(String(data)));
+                    socket.on("error", (error: unknown) => {
+                        console.error("MPV socket error:", error);
+                    });
+                    resolve(socket);
+                    this.registerMpvObservers().catch((error: unknown) => {
+                        console.error("Failed to register mpv observers:", error);
+                    });
+                });
+
+                socket.once("error", onError);
+                socket.connect(path);
+            };
+
+            attemptConnection(1);
+        });
+    }
+
+    private async registerMpvObservers() {
+        await this.writeCommand("observe_property", [ObservedProperty.MediaTitle, "media-title"]);
+        await this.writeCommand("observe_property", [ObservedProperty.Metadata, "metadata"]);
     }
 
     private handleEvent(event: string, data: any) {
@@ -470,6 +548,29 @@ export class MediaPlayer {
                             this.pendingCommands.delete(response.request_id);
                         }
                     } else if (response.event) {
+                        if (response.event === "start-file") {
+                            // Clear any previous error for the file that is starting
+                            const file = response.file || this.lastLoadCandidate;
+                            if (file) {
+                                this.currentFile = file;
+                                this.playbackErrors.delete(file);
+                            }
+
+                            this.currentMediaTitle = null;
+                            this.currentPlaybackMetadata = {};
+                        } else if (response.event === "property-change") {
+                            this.handlePropertyChange(response);
+                        } else if (response.event === "end-file" && response.reason === "error") {
+                            const file = response.file || this.currentFile || this.lastLoadCandidate || "Unknown file";
+                            const errorMessage = response.error || response["file-error"] || "Unknown playback error";
+
+                            this.playbackErrors.set(file, errorMessage);
+                            this.handleEvent(UserEvent.PlaybackError, {
+                                filename: file,
+                                error: errorMessage
+                            });
+                        }
+
                         this.handleEvent(UserEvent.MPDUpdate, response);
                     } else {
                         console.log(response);
@@ -480,4 +581,143 @@ export class MediaPlayer {
             }
         }
     }
+
+    private handlePropertyChange(response: any) {
+        const previousTitle = this.getCurrentDynamicTitle();
+
+        if (response.id === ObservedProperty.MediaTitle || response.name === "media-title") {
+            this.currentMediaTitle = typeof response.data === "string" ? response.data : null;
+        } else if (response.id === ObservedProperty.Metadata || response.name === "metadata") {
+            this.currentPlaybackMetadata = this.normalizeMpvMetadata(response.data);
+        }
+
+        const currentTitle = this.getCurrentDynamicTitle();
+        if (currentTitle !== previousTitle) {
+            this.handleEvent(UserEvent.MetadataUpdate, {
+                url: this.currentFile,
+                title: currentTitle,
+                metadata: this.currentPlaybackMetadata
+            });
+        }
+    }
+
+    private withCurrentDynamicTitle(item: PlaylistItem, dynamicTitle: string | null = this.getCurrentDynamicTitle(item)): PlaylistItem {
+        if (!dynamicTitle) {
+            return item;
+        }
+
+        return {
+            ...item,
+            title: dynamicTitle,
+            metadata: {
+                ...item.metadata,
+                title: dynamicTitle
+            }
+        };
+    }
+
+    private getCurrentDynamicTitle(item?: PlaylistItem): string | null {
+        if (this.currentMediaTitle && !this.isFallbackMediaTitle(this.currentMediaTitle, item?.filename)) {
+            return this.currentMediaTitle.trim();
+        }
+
+        return this.extractTitleFromMpvMetadata();
+    }
+
+    private extractTitleFromMpvMetadata(): string | null {
+        const titleKeys = new Set(["title", "icy-title", "icy_title", "streamtitle", "stream-title"]);
+
+        for (const key of Object.keys(this.currentPlaybackMetadata)) {
+            const normalizedKey = key.toLowerCase();
+            if (!titleKeys.has(normalizedKey)) {
+                continue;
+            }
+
+            const title = this.parseStreamTitle(this.currentPlaybackMetadata[key]);
+            if (title) {
+                return title;
+            }
+        }
+
+        return null;
+    }
+
+    private parseStreamTitle(value: string | undefined): string | null {
+        const trimmedValue = value?.trim();
+        if (!trimmedValue) {
+            return null;
+        }
+
+        const streamTitleMatch = trimmedValue.match(/StreamTitle='([^']*)'/i);
+        return (streamTitleMatch?.[1] || trimmedValue).trim() || null;
+    }
+
+    private normalizeMpvMetadata(data: unknown): Record<string, string> {
+        if (data === null || typeof data !== "object" || Array.isArray(data)) {
+            return {};
+        }
+
+        const metadata: Record<string, string> = {};
+        const rawMetadata = data as Record<string, unknown>;
+
+        for (const key of Object.keys(rawMetadata)) {
+            const value = rawMetadata[key];
+            if (value !== null && value !== undefined) {
+                metadata[key] = String(value);
+            }
+        }
+
+        return metadata;
+    }
+
+    private isFallbackMediaTitle(title: string, filename?: string): boolean {
+        const normalizedTitle = title.trim();
+        if (!normalizedTitle) {
+            return true;
+        }
+
+        const fallbackCandidates = new Set<string>();
+        if (filename) {
+            this.addFallbackTitleCandidates(fallbackCandidates, filename);
+        }
+
+        if (this.currentFile) {
+            this.addFallbackTitleCandidates(fallbackCandidates, this.currentFile);
+        }
+
+        return fallbackCandidates.has(normalizedTitle);
+    }
+
+    private addFallbackTitleCandidates(candidates: Set<string>, value: string) {
+        candidates.add(value);
+
+        try {
+            candidates.add(decodeURIComponent(value));
+        } catch {
+            // Keep the original value if it is not URI-encoded.
+        }
+
+        try {
+            const url = new URL(value);
+            this.addPathTitleCandidates(candidates, url.pathname);
+        } catch {
+            this.addPathTitleCandidates(candidates, value);
+        }
+    }
+
+    private addPathTitleCandidates(candidates: Set<string>, path: string) {
+        const pathSegments = path.split("/").filter(Boolean);
+        const lastPathSegment = pathSegments[pathSegments.length - 1];
+        if (!lastPathSegment) {
+            return;
+        }
+
+        candidates.add(lastPathSegment);
+
+        try {
+            candidates.add(decodeURIComponent(lastPathSegment));
+        } catch {
+            // Keep the original segment if it is not URI-encoded.
+        }
+    }
 } 

web/backend/src/types.ts

@@ -29,4 +29,5 @@ export interface PlaylistItem {
     playing?: boolean;
     current?: boolean;
     metadata?: LinkMetadata;
+    playbackError?: string;
 }

web/flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1740828860,
-        "narHash": "sha256-cjbHI+zUzK5CPsQZqMhE3npTyYFt9tJ3+ohcfaOF/WM=",
+        "lastModified": 1779560665,
+        "narHash": "sha256-tpyBcxPpcQb8ukyNF7DoCwfSY3VPsxHoYwj00Cayv5o=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "303bd8071377433a2d8f76e684ec773d70c5b642",
+        "rev": "64c08a7ca051951c8eae34e3e3cb1e202fe36786",
         "type": "github"
       },
       "original": {

web/flake.nix

@@ -8,97 +8,7 @@
 
   outputs = { self, nixpkgs, flake-utils }:
     let
-      # Define the NixOS module for the systemd service
-      nixosModule = { config, lib, pkgs, ... }:
-        let
-          cfg = config.services.queuecube;
-        in {
-          options.services.queuecube = {
-            enable = lib.mkEnableOption "QueueCube media player service";
-            
-            port = lib.mkOption {
-              type = lib.types.port;
-              default = 3000;
-              description = "Port on which QueueCube will listen";
-            };
-
-            enable_video = lib.mkOption {
-              type = lib.types.bool;
-              default = false;
-              description = "Enable video playback";
-            };
-
-            store_path = lib.mkOption {
-              type = lib.types.str;
-              default = "/var/tmp/queuecube";
-              description = "Path to the store for QueueCube";
-            };
-
-            invidious = lib.mkOption {
-              type = lib.types.submodule {
-                options = {
-                  enable = lib.mkOption {
-                    type = lib.types.bool;
-                    default = false;
-                    description = "Enable Invidious";
-                  };
-
-                  url = lib.mkOption {
-                    type = lib.types.str;
-                    default = "http://invidious.nor";
-                    description = "URL of the Invidious instance to use";
-                  };
-                };
-              };
-
-              default = {
-                enable = false;
-                url = "http://invidious.nor";
-              };
-            };
-            
-            user = lib.mkOption {
-              type = lib.types.str;
-              description = "User account under which QueueCube runs (required)";
-            };
-          };
-          
-          config = lib.mkIf cfg.enable {
-            users.users.${cfg.user} = {
-              packages = [ self.packages.${pkgs.system}.queuecube ];
-            };
-            
-            systemd.user.services.queuecube = {
-              description = "QueueCube media player service";
-              wantedBy = [ "default.target" ];
-              after = [ "pipewire.service" "pipewire-pulse.service" ];
-              
-              serviceConfig = {
-                ExecStart = "${self.packages.${pkgs.system}.queuecube}/bin/queuecube";
-                Restart = "on-failure";
-                RestartSec = 5;
-                
-                # Allow access to X11 for mpv
-                Environment = [ "DISPLAY=:0" ];
-              };
-              
-              environment = {
-                PORT = toString cfg.port;
-                ENABLE_VIDEO = if cfg.enable_video then "1" else "0";
-                USE_INVIDIOUS = if cfg.invidious.enable then "1" else "0";
-                INVIDIOUS_BASE_URL = cfg.invidious.url;
-                STORE_PATH = cfg.store_path;
-              };
-            };
-          };
-        };
-    in
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = nixpkgs.legacyPackages.${system};
-        
-        # Define the package using buildNpmPackage
-        queuecube = pkgs.buildNpmPackage {
+      mkQueuecube = pkgs: pkgs.buildNpmPackage {
         pname = "queuecube";
         version = "0.1.0";
         
@@ -163,6 +73,136 @@
         };
       };
 
+      # Define the NixOS module for the systemd service
+      nixosModule = { config, lib, pkgs, ... }:
+        let
+          cfg = config.services.queuecube;
+          package = mkQueuecube pkgs;
+        in {
+          options.services.queuecube = {
+            enable = lib.mkEnableOption "QueueCube media player service";
+            
+            port = lib.mkOption {
+              type = lib.types.port;
+              default = 3000;
+              description = "Port on which QueueCube will listen";
+            };
+
+            enable_video = lib.mkOption {
+              type = lib.types.bool;
+              default = false;
+              description = "Enable video playback";
+            };
+            
+            enable_screenshare = lib.mkOption {
+              type = lib.types.bool;
+              default = false;
+              description = "Enable screensharing";
+            };
+
+            mpv_ytdl_format = lib.mkOption {
+              type = lib.types.nullOr lib.types.str;
+              default = "best";
+              description = "yt-dlp format selector passed to mpv. Set to null to use mpv's default format selection.";
+            };
+
+            store_path = lib.mkOption {
+              type = lib.types.str;
+              default = "/var/tmp/queuecube";
+              description = "Path to the store for QueueCube";
+            };
+
+            invidious = lib.mkOption {
+              type = lib.types.submodule {
+                options = {
+                  enable = lib.mkOption {
+                    type = lib.types.bool;
+                    default = false;
+                    description = "Enable Invidious";
+                  };
+
+                  url = lib.mkOption {
+                    type = lib.types.str;
+                    default = "http://invidious.nor";
+                    description = "URL of the Invidious instance to use";
+                  };
+                };
+              };
+
+              default = {
+                enable = false;
+                url = "http://invidious.nor";
+              };
+            };
+            
+            user = lib.mkOption {
+              type = lib.types.str;
+              description = "User account under which QueueCube runs (required)";
+            };
+          };
+          
+          config = lib.mkIf cfg.enable {
+            users.users.${cfg.user} = {
+              packages = [ package ];
+            };
+            
+            systemd.user.services.queuecube = {
+              description = "QueueCube media player service";
+              wantedBy = [ "default.target" ];
+              after = [ "pipewire.service" "pipewire-pulse.service" ];
+
+              serviceConfig = {
+                ExecStart = "${package}/bin/queuecube";
+                Restart = "on-failure";
+                RestartSec = 5;
+
+                # Remove all resource limits for mpv to function properly
+                LimitNOFILE = "infinity";          # No limit on file descriptors
+                LimitMEMLOCK = "infinity";         # No limit on locked memory (for real-time audio)
+                LimitNPROC = "infinity";           # No limit on number of processes
+                LimitAS = "infinity";              # No limit on address space
+                LimitRSS = "infinity";             # No limit on resident set size
+                LimitCORE = "infinity";            # Allow core dumps for debugging
+                LimitDATA = "infinity";            # No limit on data segment
+                LimitSTACK = "infinity";           # No limit on stack size
+                LimitCPU = "infinity";             # No limit on CPU time
+                LimitRTPRIO = "99";                # Allow real-time priority
+                LimitRTTIME = "infinity";          # No limit on real-time scheduling
+
+                # Nice level for better performance
+                Nice = "-10";
+
+                # Allow access to necessary devices and features
+                PrivateDevices = false;
+                ProtectHome = false;
+                ProtectSystem = false;
+                NoNewPrivileges = false;
+
+                # Environment for X11 and runtime directories
+                Environment = [
+                  "DISPLAY=:0"
+                ];
+              };
+
+              environment = {
+                PORT = toString cfg.port;
+                ENABLE_VIDEO = if cfg.enable_video then "1" else "0";
+                ENABLE_SCREENSHARE = if cfg.enable_screenshare then "1" else "0";
+                USE_INVIDIOUS = if cfg.invidious.enable then "1" else "0";
+                INVIDIOUS_BASE_URL = cfg.invidious.url;
+                STORE_PATH = cfg.store_path;
+              } // lib.optionalAttrs (cfg.mpv_ytdl_format != null) {
+                MPV_YTDL_FORMAT = cfg.mpv_ytdl_format;
+              };
+            };
+          };
+        };
+    in
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        queuecube = mkQueuecube pkgs;
+        
       in {
         packages = {
           default = queuecube;
@@ -177,8 +217,7 @@
         # Development environment
         devShells.default = pkgs.mkShell {
           buildInputs = with pkgs; [
-            nodejs_20
-            nodePackages.npm
+            nodejs
             mpv
             yt-dlp
             pulseaudio

web/frontend/src/api/player.tsx

@@ -28,6 +28,7 @@ export interface PlaylistItem {
   id: number;
   playing: boolean | null;
   metadata?: Metadata;
+  playbackError?: string;
 }
 
 export const getDisplayTitle = (item: PlaylistItem): string => {
@@ -62,6 +63,7 @@ export enum ServerEvent {
   FavoritesUpdate     = "favorites_update",
   MetadataUpdate      = "metadata_update",
   MPDUpdate           = "mpd_update",
+  PlaybackError       = "playback_error",
   ScreenShare         = "screen_share",
 }
 

web/frontend/src/components/App.tsx

@@ -199,6 +199,7 @@ const App: React.FC = () => {
       case ServerEvent.NowPlayingUpdate:
       case ServerEvent.MetadataUpdate:
       case ServerEvent.MPDUpdate:
+      case ServerEvent.PlaybackError:
         fetchPlaylist();
         fetchNowPlaying();
         break;

web/frontend/src/components/SongRow.tsx

@@ -1,6 +1,6 @@
 import classNames from 'classnames';
 import React, { useState, useRef, useEffect, ReactNode } from 'react';
-import { FaPlay, FaVolumeUp, FaVolumeOff } from 'react-icons/fa';
+import { FaPlay, FaVolumeUp, FaVolumeOff, FaExclamationTriangle } from 'react-icons/fa';
 import { getDisplayTitle, PlaylistItem } from '../api/player';
 
 export enum PlayState {
@@ -19,6 +19,7 @@ export interface SongRowProps {
 
 const SongRow: React.FC<SongRowProps> = ({ song, auxControl, playState, onDelete, onPlay }) => {
   const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
+  const [showErrorDetails, setShowErrorDetails] = useState(false);
   const buttonRef = useRef<HTMLButtonElement>(null);
   
   useEffect(() => {
@@ -38,6 +39,7 @@ const SongRow: React.FC<SongRowProps> = ({ song, auxControl, playState, onDelete
   }, [showDeleteConfirm]);
   
   const displayTitle = getDisplayTitle(song);
+  const hasError = !!song.playbackError;
   
   return (
     <div className={classNames(
@@ -46,16 +48,46 @@ const SongRow: React.FC<SongRowProps> = ({ song, auxControl, playState, onDelete
       "bg-black/30": playState === PlayState.NotPlaying,
     })}>
       <div className="flex flex-row gap-2">
+        <div className="relative">
           <button 
-          className="text-white/40 hover:text-white transition-colors px-3 py-1 rounded"
-          onClick={onPlay}
+            className={classNames(
+              "transition-colors px-3 py-1 rounded", 
+              hasError ? "text-amber-300 hover:text-amber-100" : "text-white/40 hover:text-white"
+            )}
+            onClick={() => {
+              if (hasError) {
+                setShowErrorDetails((prev) => !prev);
+              } else {
+                onPlay();
+              }
+            }}
+            onMouseEnter={() => {
+              if (hasError) {
+                setShowErrorDetails(true);
+              }
+            }}
+            onMouseLeave={() => {
+              if (hasError) {
+                setShowErrorDetails(false);
+              }
+            }}
+            title={hasError ? song.playbackError : undefined}
           >
             {
+              hasError ? <FaExclamationTriangle size={12} /> : 
               playState === PlayState.Playing ? <FaVolumeUp size={12} /> 
               : playState === PlayState.Paused ? <FaVolumeOff size={12} /> 
               : <FaPlay size={12} />
             }
           </button>
+
+          {hasError && showErrorDetails && (
+            <div className="absolute z-10 top-full left-0 mt-1 w-64 p-2 text-xs text-white bg-red-600/90 rounded shadow-lg">
+              <div className="font-semibold mb-1">Playback error</div>
+              <div className="break-words">{song.playbackError}</div>
+            </div>
+          )}
+        </div>
       </div>
       
       <div className="flex-grow min-w-0">