fix(macos): fix compilation errors for macOS target

[Saadnajmi]

Summary

Fixes several macOS compilation issues that surface when building for macOS targets (e.g. via SPM or when CocoaPods compiles both iOS and macOS source files together).

RCTLinkingManager — duplicate symbol & UIKit compilation errors

Both Libraries/LinkingIOS/RCTLinkingManager.mm (iOS) and Libraries/LinkingIOS/macos/RCTLinkingManager.mm (macOS) define @implementation RCTLinkingManager without any platform guards. When both files are compiled for macOS (which happens with SPM since the target path is Libraries/LinkingIOS/), this causes:

1. Duplicate symbol errors — two @implementation RCTLinkingManager definitions
2. UIKit compilation failures — the iOS file references UIApplication, UIApplicationOpenURLOptionsKey, UIApplicationLaunchOptionsURLKey, UIApplicationOpenSettingsURLString, and UIUserActivityRestoring which don't exist on macOS

Fix:

• iOS file: wrapped with #if !TARGET_OS_OSX / #endif
• macOS file: wrapped with #if TARGET_OS_OSX / #endif

The header (RCTLinkingManager.h) already has correct #if !TARGET_OS_OSX guards.

RCTLinkingManager (macOS) — missing TurboModule methods

The macOS implementation was missing methods required by the NativeLinkingManagerSpec TurboModule spec:

• openSettings:resolve:reject: — opens System Preferences on macOS
• sendIntent:extras:resolve:reject: — stub (Android-only API)
• getTurboModule: — required for TurboModule registration

Also added:

• NativeLinkingManagerSpec protocol conformance
• Fixed import from "RCTLinkingManager.h" to <React/RCTLinkingManager.h> for header search path consistency
• Added missing #import <React/RCTLog.h> for RCTLogError

RCTCursor.m — missing AppKit import

The file uses NSCursor extensively (an AppKit class) but only imported <Foundation/Foundation.h>. Added #import <AppKit/AppKit.h> inside a #if TARGET_OS_OSX guard.

RCTViewComponentView.mm — duplicate cursor check

Lines 339-347 contained an identical cursor property check twice (copy-paste error). Removed the duplicate.

Test plan

• Build RNTester for iOS (RNTester scheme)
• Build RNTester for macOS (RNTester-macOS scheme)
• Build RNTester for visionOS (RNTester-visionOS scheme)
• Verify Linking.openURL() works on macOS
• Verify Linking.openSettings() works on macOS
• Verify cursor rendering on macOS Fabric components

🤖 Generated with Claude Code

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