feat: show optional SponsorBlock ranges on playback timeline

Sources/App/PlayerActions.swift

@@ -206,6 +206,28 @@ struct PlayerMiruroMenu: View {
     }
 }
 
+@MainActor
+struct PlayerSponsorBlockMenu: View {
+    @ObservedObject var model: PlayerModel
+
+    var body: some View {
+        Menu("SponsorBlock") {
+            Toggle("Show Sponsored Ranges", isOn: Binding(
+                get: { model.sponsorBlockEnabled },
+                set: { model.setSponsorBlockEnabled($0) }))
+            Text("Connects to sponsor.ajay.app using a video-ID hash prefix.")
+            Text("Reduces disclosure; not anonymous. Display only, never skips.")
+            Link("(Using SponsorBlock)", destination: URL(string: "https://sponsor.ajay.app/")!)
+            Menu("Acknowledgements") {
+                Text("Uses SponsorBlock data under CC BY-NC-SA 4.0")
+                Link("CC BY-NC-SA 4.0 License",
+                     destination: URL(string: "https://creativecommons.org/licenses/by-nc-sa/4.0/")!)
+                Text("Display filters and merges ranges; does not modify source timings.")
+            }
+        }
+    }
+}
+
 @MainActor
 struct PlayerCommands: Commands {
     @FocusedObject private var focusedModel: PlayerModel?
@@ -311,6 +333,7 @@ struct PlayerCommands: Commands {
                 }
             }
             PlayerMiruroMenu(model: model).disabled(!hasFocusedScene)
+            PlayerSponsorBlockMenu(model: model)
             Button(model.showsBufferInfo ? "Hide Buffer Info" : "Show Buffer Info") {
                 model.performMenuAction(bufferInfo)
             }