Fix SwiftFormat and SwiftLint issues

- Fix indentation in AppSidebarNavigation, VideoCell
- Replace && with comma in PlayerModel condition
- Add SwiftLint suppression for necessary tvOS 17.0 availability check
- Update SwiftLint config to use renamed rules and disable false positives

.swiftlint.yml

@@ -8,6 +8,15 @@ disabled_rules:
   - multiline_arguments
   - implicit_return
   - closure_end_indentation
+  - discarded_notification_center_observer  # Observer intentionally lives for app lifetime
+  # Disable deprecated rules in favor of their renamed versions
+  - operator_whitespace  # renamed to function_name_whitespace
+  - redundant_optional_initialization  # renamed to implicit_optional_initialization
+
+opt_in_rules:
+  - function_name_whitespace
+  - implicit_optional_initialization
+
 excluded:
   - Vendor
   - Tests Apple TV

Model/Player/PlayerModel.swift

@@ -650,7 +650,7 @@ final class PlayerModel: ObservableObject {
 
         // When switching away from AVPlayer, clear its current item to release Now Playing control
         #if !os(macOS)
-            if from == .appleAVPlayer && to == .mpv {
+            if from == .appleAVPlayer, to == .mpv {
                 avPlayerBackend.avPlayer.replaceCurrentItem(with: nil)
 
                 // Clear Now Playing info entirely before MPV takes over

Shared/Navigation/AppSidebarNavigation.swift

@@ -15,7 +15,7 @@ struct AppSidebarNavigation: View {
 
     var body: some View {
         #if os(iOS)
-        content.introspect(.viewController, on: .iOS(.v15, .v16, .v17, .v18, .v26)) { viewController in
+            content.introspect(.viewController, on: .iOS(.v15, .v16, .v17, .v18, .v26)) { viewController in
                 // workaround for an empty supplementary view on launch
                 // the supplementary view is determined by the default selection inside the
                 // primary view, but the primary view is not loaded so its selection is not read

Shared/Subscriptions/FeedView.swift

@@ -223,6 +223,7 @@ struct FeedView: View {
     var header: some View {
         HStack(spacing: 16) {
             #if os(tvOS)
+                // swiftlint:disable:next deployment_target
                 if #available(tvOS 17.0, *) {
                     Menu {
                         accountsPicker

Shared/Videos/VideoCell.swift

@@ -433,9 +433,9 @@ struct VideoCell: View {
 
     private var thumbnailImage: some View {
         VideoCellThumbnail(video: video)
-            #if os(tvOS)
+        #if os(tvOS)
             .frame(minHeight: 320)
-            #endif
+        #endif
             .mask(RoundedRectangle(cornerRadius: thumbnailRoundingCornerRadius))
     }