Add tvOS display frame rate and dynamic range matching

Lets the Apple TV switch its HDMI output to match the playing video's
frame rate and dynamic range via AVDisplayManager.preferredDisplayCriteria,
driven from MPV's container-fps and video-params/gamma. Two opt-in toggles
(default off) live under Playback → Display on tvOS; both are no-ops on
other platforms. Anchor an AVKit class symbol so the linker keeps AVKit
linked — Swift only autolinks AVFoundation here, and without AVKit the
UIWindow.avDisplayManager category isn't loaded at runtime.

Yattee/Views/Settings/PlaybackSettingsView.swift

@@ -17,6 +17,9 @@ struct PlaybackSettingsView: View {
                 AudioSection(settings: settings)
                 SubtitlesSection(settings: settings)
                 BehaviorSection(settings: settings)
+                #if os(tvOS)
+                TVDisplayMatchingSection(settings: settings)
+                #endif
                 QueueSection(settings: settings)
                 #if os(iOS)
                 OrientationSection(settings: settings)
@@ -286,6 +289,31 @@ private struct BehaviorSection: View {
     }
 }
 
+// MARK: - TV Display Matching Section
+
+#if os(tvOS)
+private struct TVDisplayMatchingSection: View {
+    @Bindable var settings: SettingsManager
+
+    var body: some View {
+        SettingsFormSection(
+            "settings.playback.tvDisplayMatching.header",
+            footer: "settings.playback.tvDisplayMatching.footer"
+        ) {
+            Toggle(
+                String(localized: "settings.playback.tvDisplayMatching.frameRate"),
+                isOn: $settings.tvMatchDisplayFrameRate
+            )
+
+            Toggle(
+                String(localized: "settings.playback.tvDisplayMatching.dynamicRange"),
+                isOn: $settings.tvMatchDisplayDynamicRange
+            )
+        }
+    }
+}
+#endif
+
 // MARK: - Queue Section
 
 private struct QueueSection: View {