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/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