Fix SwiftLint and SwiftFormat violations

- Run SwiftFormat to fix indentation, spacing, and formatting issues
- Replace CGFloat with Double and NSRect with CGRect per style guide
- Remove redundant .center alignment specifications
- Remove unnecessary @available checks for satisfied deployment targets
- Fix closure brace indentation for consistency
- Disable closure_end_indentation rule to resolve SwiftFormat conflict

All linting checks now pass with zero errors and warnings.

Shared/YatteeApp.swift

@@ -73,15 +73,15 @@ struct YatteeApp: App {
                 )
             #else
                 .onReceive(
-                    NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)
-                ) { _ in
-                    player.handleEnterForeground()
-                }
-                .onReceive(
-                    NotificationCenter.default.publisher(for: UIApplication.didEnterBackgroundNotification)
-                ) { _ in
-                    player.handleEnterBackground()
-                }
+                        NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)
+                    ) { _ in
+                        player.handleEnterForeground()
+                    }
+                    .onReceive(
+                        NotificationCenter.default.publisher(for: UIApplication.didEnterBackgroundNotification)
+                    ) { _ in
+                        player.handleEnterBackground()
+                    }
             #endif
             #if os(iOS)
             .handlesExternalEvents(preferring: Set(["*"]), allowing: Set(["*"]))