I just needed to do something so I felt useful today

- Eliminated duplicate platform stubs: Created shared macro for macOS/Linux implementations
- Extracted cursor restoration logic: Shared helper function for Windows API calls
- Refactored cursor application: Helper function for copy/apply/error handling pattern
- Reduced ~70 lines of duplicate code while maintaining all functionality

frontend/src-tauri/src/platform/mod.rs

@@ -3,6 +3,9 @@
 // Common types for cursor handling
 pub mod types;
 
+// Shared stub implementations for unimplemented platforms
+mod stub_impl;
+
 // Windows implementation
 #[cfg(target_os = "windows")]
 mod windows;