fix: restore macOS navigation with unsaved forms

native/tests/navigation-macos.test.js

@@ -8,7 +8,7 @@ import test from 'node:test';
 import { fileURLToPath } from 'node:url';
 
 test(
-    'WebKit owns interactive navigation and preserves native back/forward history',
+    'WebKit preserves history and confirms dirty form navigation without losing delegate callbacks',
     { skip: process.platform !== 'darwin' },
     () => {
         const directory = mkdtempSync(join(tmpdir(), 'kanbangit-navigation-'));
@@ -48,7 +48,7 @@ test(
             assert.equal(
                 result.status,
                 0,
-                result.stderr || result.error?.message,
+                result.stderr || result.error?.message || result.signal,
             );
             assert.match(result.stdout, /PASS: WebKit/);
         } finally {