feat(*): subsonic client with avfoundation playback and apple music ui

Amphlify/App/Router.swift

@@ -0,0 +1,50 @@
+import Domain
+import Observation
+
+enum AppTab: Hashable {
+    case home, radio, library, search
+}
+
+enum LibrarySection: Hashable, CaseIterable {
+    case playlists, artists, albums, songs, genres
+}
+
+enum Route: Hashable {
+    case album(EntityID)
+    case artist(EntityID)
+    case playlist(EntityID)
+    case genre(String)
+    case favorites
+    case section(LibrarySection)
+}
+
+@Observable
+final class Router {
+    var tab: AppTab = .home
+    var paths: [AppTab: [Route]] = [:]
+    var showsNowPlaying = false
+    var showsQueue = false {
+        didSet {
+            if showsQueue {
+                showsLyrics = false
+            }
+        }
+    }
+
+    var showsLyrics = false {
+        didSet {
+            if showsLyrics {
+                showsQueue = false
+            }
+        }
+    }
+
+    func path(for tab: AppTab) -> [Route] {
+        paths[tab] ?? []
+    }
+
+    func open(_ route: Route) {
+        showsNowPlaying = false
+        paths[tab, default: []].append(route)
+    }
+}