Home screen, library-wide search, splash with orbital particles, macOS download fix

- Add Netflix-style Home with recent audiobooks/podcasts, list/grid toggle shared with Library
- Add searchable libraries — audiobooks filter on title/author; podcasts also index and search episodes across the whole library
- Add unified context menu (download / progress remove) across Home, Library, and PodcastDetail
- Rework cover badges: listened checkmark top-right, download indicator bottom-right; hide progress bar when finished
- Add AirPlay picker in PlayerBar
- Replace splash with four-phase animation: orbital particles → attract → flash → fade; cross-platform iOS+macOS, runtime AppIcon lookup
- Fix macOS parallel downloads: align connection settings with iOS, raise timeoutIntervalForRequest to 300s
- Fix progress deletion using server-side progress UUID (DELETE /api/me/progress/:id)
- Bump CFBundleVersion to 8

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ABS Client/Audiobookshelf swift/Views/AirPlayPickerButton.swift

@@ -0,0 +1,36 @@
+import SwiftUI
+import AVKit
+
+/// Cross-platform SwiftUI wrapper around `AVRoutePickerView`. Opens the system
+/// route picker (AirPlay devices, Bluetooth, HomePod, Apple TV, etc.) when
+/// tapped. Available on iOS 11+ and macOS 10.15+ via AppKit.
+///
+/// The actual audio routing requires `AVPlayer.allowsExternalPlayback = true`
+/// — see `PlayerEngine.load(...)` where the queue player is configured.
+#if os(iOS)
+struct AirPlayPickerButton: UIViewRepresentable {
+    var tintColor: UIColor = .label
+    var activeTintColor: UIColor = .systemGreen
+
+    func makeUIView(context: Context) -> AVRoutePickerView {
+        let view = AVRoutePickerView()
+        view.tintColor = tintColor
+        view.activeTintColor = activeTintColor
+        view.prioritizesVideoDevices = false
+        return view
+    }
+
+    func updateUIView(_ uiView: AVRoutePickerView, context: Context) {
+        uiView.tintColor = tintColor
+        uiView.activeTintColor = activeTintColor
+    }
+}
+#else
+struct AirPlayPickerButton: NSViewRepresentable {
+    func makeNSView(context: Context) -> AVRoutePickerView {
+        AVRoutePickerView()
+    }
+
+    func updateNSView(_ nsView: AVRoutePickerView, context: Context) {}
+}
+#endif