Replace UIScreen.main with scene-local context

- List row hairlines read displayScale from the SwiftUI environment
- MPV render views take contentScaleFactor from traitCollection and
  re-apply it on UITraitDisplayScale changes
- ExpandedPlayerWindow scales against the presenting view's own height
- MPVPiPBridge sizes the PiP layer from the container view's window
  scene screen (UIScreen.main kept only as a nil-window fallback)
- WideScreenPlayerLayout falls back to the offered geometry size
- Remote control fullscreen state comes from the player sheet's layout
  pass via NavigationCoordinator.isWideScreenLayoutActive instead of
  screen bounds aspect
- Orientation TODOs for Dynamic Island side detection and
  prefersInterfaceOrientationLocked

Yattee/Services/Navigation/NavigationCoordinator.swift

@@ -68,6 +68,7 @@ final class NavigationCoordinator {
             if !isPlayerExpanded {
                 hasAppliedPanelDefaultVisibility = false
                 isCornerLayoutActive = false
+                isWideScreenLayoutActive = false
             }
         }
     }
@@ -82,6 +83,11 @@ final class NavigationCoordinator {
     /// different view than the layout resolver.
     var isCornerLayoutActive = false
 
+    /// Whether the expanded player currently resolves to the widescreen
+    /// (landscape) layout. Set from the sheet's layout pass so non-view code
+    /// (remote control state) reads the real layout instead of screen bounds.
+    var isWideScreenLayoutActive = false
+
     /// Whether the mini player queue sheet is showing.
     var isMiniPlayerQueueSheetPresented = false
 

Yattee/Services/OrientationManager.swift

@@ -55,6 +55,8 @@ final class OrientationManager {
         notifyOrientationChange()
     }
 
+    // TODO: Modernization - Consider adopting `prefersInterfaceOrientationLocked` (iOS 26+)
+    // as the modern replacement for orientation locking via `supportedInterfaceOrientations`.
     /// Returns the supported interface orientations.
     /// When locked, returns only the locked orientation.
     /// Otherwise: iPhone = all except upside-down, iPad = all

Yattee/Services/Player/MPV/MPVPiPBridge.swift

@@ -30,6 +30,8 @@ final class MPVPiPBridge: NSObject {
     private let sampleBufferLayer = AVSampleBufferDisplayLayer()
     private var pipController: AVPictureInPictureController?
     private weak var mpvBackend: MPVBackend?
+    /// The view currently hosting `sampleBufferLayer`; used to reach the scene's screen while PiP is active.
+    private weak var containerView: PlatformView?
 
     /// Whether PiP is currently active.
     var isPiPActive: Bool {
@@ -123,6 +125,7 @@ final class MPVPiPBridge: NSObject {
     ///   - containerView: The view to embed the sample buffer layer in
     func setup(backend: MPVBackend, in containerView: PlatformView) {
         self.mpvBackend = backend
+        self.containerView = containerView
 
         // Configure sample buffer layer
         sampleBufferLayer.frame = containerView.bounds
@@ -283,9 +286,13 @@ final class MPVPiPBridge: NSObject {
                 }
             }
 
-            let screenWidth = UIScreen.main.bounds.width
+            // TODO: Modernization - The UIScreen.main fallback assumes a single display. It is only
+            // reached when the container view has no window scene (e.g. layer detached); consider
+            // returning early there instead of sizing against a screen the layer may not be on.
+            let screenBounds = containerView?.window?.windowScene?.screen.bounds ?? UIScreen.main.bounds
+            let screenWidth = screenBounds.width
             // Calculate height based on aspect ratio, capped to leave room for details
-            let maxHeight = UIScreen.main.bounds.height * 0.6 // Leave 40% for details
+            let maxHeight = screenBounds.height * 0.6 // Leave 40% for details
             let calculatedHeight = screenWidth / aspectRatio
             let height = min(calculatedHeight, maxHeight)
             let width = height < calculatedHeight ? height * aspectRatio : screenWidth
@@ -409,6 +416,7 @@ final class MPVPiPBridge: NSObject {
     /// as the layer must be in a visible window hierarchy.
     func moveLayer(to containerView: PlatformView) {
         sampleBufferLayer.removeFromSuperlayer()
+        self.containerView = containerView
         if let frame = sanitizedGeometry(containerView.bounds, from: "moveLayer(to:)") {
             sampleBufferLayer.frame = frame
         }

Yattee/Services/Player/MPV/MPVRenderView.swift

@@ -229,7 +229,10 @@ final class MPVRenderView: UIView {
 
     private func commonInit() {
         backgroundColor = .black
-        contentScaleFactor = UIScreen.main.scale
+        contentScaleFactor = traitCollection.displayScale
+        registerForTraitChanges([UITraitDisplayScale.self]) { (self: MPVRenderView, _) in
+            self.contentScaleFactor = self.traitCollection.displayScale
+        }
 
         // Configure EAGL layer
         // Note: retainedBacking=true is required for glReadPixels to work (PiP frame capture).

Yattee/Services/Player/MPV/MPVSoftwareRenderView.swift

@@ -86,7 +86,10 @@ final class MPVSoftwareRenderView: UIView {
     
     private func commonInit() {
         backgroundColor = .black
-        contentScaleFactor = UIScreen.main.scale
+        contentScaleFactor = traitCollection.displayScale
+        registerForTraitChanges([UITraitDisplayScale.self]) { (self: MPVSoftwareRenderView, _) in
+            self.contentScaleFactor = self.traitCollection.displayScale
+        }
         
         // Observe app lifecycle
         NotificationCenter.default.addObserver(

Yattee/Services/RemoteControl/RemoteControlCoordinator.swift

@@ -480,8 +480,7 @@ final class RemoteControlCoordinator {
         // Compute fullscreen state (same logic as shouldShowFullscreenButton in PlayerControlsActions)
         #if os(iOS)
         let isIPad = UIDevice.current.userInterfaceIdiom == .pad
-        let screenBounds = UIScreen.main.bounds
-        let isWideScreenLayout = screenBounds.width > screenBounds.height
+        let isWideScreenLayout = navigationCoordinator?.isWideScreenLayoutActive ?? false
         // iPad in widescreen = can't force rotation, so fullscreen toggle not available
         let canToggleFullscreen = !(isIPad && isWideScreenLayout) && state.currentVideo != nil
         let isFullscreen = isWideScreenLayout

Yattee/Views/Components/SourceListRow.swift

@@ -16,6 +16,8 @@ struct SourceListRow<Content: View>: View {
 
     @ViewBuilder let content: () -> Content
 
+    @Environment(\.displayScale) private var displayScale
+
     /// Horizontal padding for row content.
     #if os(macOS)
     private let horizontalPadding: CGFloat = 12
@@ -64,7 +66,7 @@ struct SourceListRow<Content: View>: View {
         #if os(iOS)
         Rectangle()
             .fill(Color(uiColor: .separator))
-            .frame(height: 1 / UIScreen.main.scale)
+            .frame(height: 1 / displayScale)
             .padding(.leading, dividerLeadingPadding)
         #elseif os(macOS)
         Rectangle()

Yattee/Views/Components/VideoListRow.swift

@@ -56,6 +56,8 @@ struct VideoListRow<Content: View>: View {
 
     @ViewBuilder let content: () -> Content
 
+    @Environment(\.displayScale) private var displayScale
+
     /// Horizontal padding for row content.
     private let horizontalPadding: CGFloat = 16
 
@@ -91,7 +93,7 @@ struct VideoListRow<Content: View>: View {
         #if os(iOS)
         Rectangle()
             .fill(Color(uiColor: .separator))
-            .frame(height: 1 / UIScreen.main.scale)
+            .frame(height: 1 / displayScale)
             .padding(.leading, dividerLeadingPadding)
         #elseif os(macOS)
         Rectangle()

Yattee/Views/Player/ExpandedPlayerSheet.swift

@@ -367,6 +367,9 @@ struct ExpandedPlayerSheet: View {
                 navigationCoordinator?.isCornerLayoutActive = newValue
             }
             #endif
+            .onChange(of: wideScreen, initial: true) { _, newValue in
+                navigationCoordinator?.isWideScreenLayoutActive = newValue
+            }
             .onChange(of: wideScreen) { _, newValue in
                 isInWideScreenLayout = newValue
                 #if os(iOS)

Yattee/Views/Player/ExpandedPlayerWindow.swift

@@ -622,11 +622,6 @@ final class ExpandedPlayerWindowManager {
         mainWindow?.subviews.first
     }
 
-    /// Current window height for calculating transforms
-    private var windowHeight: CGFloat {
-        mainWindow?.bounds.height ?? UIScreen.main.bounds.height
-    }
-
     /// Applies scale and corner radius to main window based on progress (0 = normal, 1 = fully scaled)
     func scaleMainWindow(progress: CGFloat) {
         // Capture the presenting view reference on first call
@@ -648,7 +643,7 @@ final class ExpandedPlayerWindowManager {
         let scale = 1 - scaleAmount
 
         // Offset to keep the view centered vertically after scaling
-        let offsetY = (windowHeight * scaleAmount) / 2
+        let offsetY = (presentingView.bounds.height * scaleAmount) / 2
 
         // Apply corner radius proportional to progress
         presentingView.layer.cornerRadius = clampedProgress * scaledCornerRadius
@@ -667,7 +662,7 @@ final class ExpandedPlayerWindowManager {
         let clampedProgress = max(0, min(1, progress))
         let scaleAmount = clampedProgress * maxScaleProgress
         let scale = 1 - scaleAmount
-        let offsetY = (windowHeight * scaleAmount) / 2
+        let offsetY = (presentingView.bounds.height * scaleAmount) / 2
         let cornerRadius = clampedProgress * scaledCornerRadius
         
         UIView.animate(withDuration: duration, delay: 0, usingSpringWithDamping: damping, initialSpringVelocity: 0, options: []) {

Yattee/Views/Player/WideScreenPlayerLayout.swift

@@ -139,12 +139,11 @@ struct WideScreenPlayerLayout<PlayerContent: View>: View {
 
     /// Get full screen bounds from window scene (ignores safe area constraints from parent)
     /// On macOS, this is not used - geometry reader size is used directly
-    private var windowSceneBounds: CGSize {
+    private func windowSceneBounds(fallback: CGSize) -> CGSize {
         #if os(iOS)
         guard let window = foregroundWindow else {
-            // Fallback to screen bounds
-            let screen = UIScreen.main.bounds
-            return CGSize(width: max(screen.width, screen.height), height: min(screen.width, screen.height))
+            // Fallback to the space this view was actually offered
+            return fallback
         }
         // Window frame gives actual size including orientation
         return window.frame.size
@@ -158,7 +157,7 @@ struct WideScreenPlayerLayout<PlayerContent: View>: View {
             // On iOS: Use window bounds to get full size (avoids safe area constraint from parent)
             // On macOS: Use geometry reader size directly (no safe area concerns, window is the source of truth)
             #if os(iOS)
-            let windowBounds = windowSceneBounds
+            let windowBounds = windowSceneBounds(fallback: geometry.size)
             let availableWidth = windowBounds.width
             let availableHeight = windowBounds.height
             let safeAreaLeft = windowSafeAreaInsets.leading
@@ -181,6 +180,13 @@ struct WideScreenPlayerLayout<PlayerContent: View>: View {
             // Detect which side has Dynamic Island based on interface orientation
             // Note: Can't use safe area comparison because both sides have similar values (~62px each)
             #if os(iOS)
+            // TODO: Modernization - This distinguishes landscapeLeft from landscapeRight to locate
+            // the Dynamic Island, which window bounds/size classes cannot express. Read the
+            // orientation from the hosting scene's `effectiveGeometry.interfaceOrientation`
+            // (iOS 26+) instead of the deprecated `UIWindowScene.interfaceOrientation` once the
+            // deployment target allows, and consider `traitCollection.verticalBarEdge` (iOS 27.1)
+            // for the bar-edge question. Global scene lookup should be replaced by the hosting
+            // window (e.g. via a UIViewRepresentable reading `view.window?.windowScene`).
             let interfaceOrientation = UIApplication.shared.connectedScenes
                 .compactMap { $0 as? UIWindowScene }
                 .first?