Expose MeshView fallbackGradient for tests

Remove coverage-ignore markers and add a DEBUG-only testingFallbackGradient accessor that returns the private fallbackGradient. Update tests to capture the MeshView instance and render testingFallbackGradient so the gradient is exercised by the coverage runner. This ensures the fallback gradient is reachable in Xcode coverage builds and improves test coverage.

Author: 1998code

Sources/SwiftNEW/Styles/MeshView.swift

@@ -43,7 +43,6 @@ struct MeshView: View {
     }
     #endif
 
-    // coverage:ignore-start -- Covered by compatibility builds; unreachable on the Xcode 26 coverage runner.
     private var fallbackGradient: some View {
         LinearGradient(
             colors: [Color(.clear), color.opacity(0.6)],
@@ -52,5 +51,10 @@ struct MeshView: View {
         )
         .ignoresSafeArea(.all)
     }
-    // coverage:ignore-end
+
+    #if DEBUG
+    var testingFallbackGradient: some View {
+        fallbackGradient
+    }
+    #endif
 }

Tests/SwiftNEWTests/SwiftNEWViewCoverageTests.swift

@@ -257,7 +257,9 @@ import AppKit
     let sut = makeSwiftNEW(items: sampleItems(), loading: false, mesh: true)
 
     render(sut.sheetHistory)
-    render(MeshView(color: .constant(.purple)))
+    let meshView = MeshView(color: .constant(.purple))
+    render(meshView)
+    render(meshView.testingFallbackGradient)
     render(NoiseView(size: 128))
     render(SnowfallView())
     render(FloatingParticlesView())