fix: Disable #Preview macro for SPM command-line builds

The #Preview macro requires PreviewsMacros plugin which may not be
available during SPM command-line builds, causing build failures on
fresh Mac installations. Commented out the preview block to fix
'fastlane launch_lite' build errors.

Preview can be re-enabled when building in Xcode by uncommenting.

Fixes: error: external macro implementation type 'PreviewsMacros.SwiftUIView'
could not be found for macro 'Preview(_:body:)'

Author: claude

Sources/ClickIt/Lite/SimplifiedMainView.swift

@@ -386,7 +386,8 @@ struct SimplifiedMainView: View {
 }
 
 // MARK: - Preview
-
-#Preview {
-    SimplifiedMainView()
-}
+// Note: Preview disabled for SPM command-line builds due to macro plugin requirements
+// Uncomment when building in Xcode:
+// #Preview {
+//     SimplifiedMainView()
+// }