fix: make-global keeps the backup sentence on a failure on page 2+ (ruling P14)

failedOn() replaced the hint for a failure after earlier pages were
replaced, so the "Sicherung X liegt im Papierkorb" sentence of the failed
page's backup was lost. The hint now leads with it when a backup exists.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7

tests/Unit/Integrations/Divi/Library/LibraryMakeGlobalAbilityTest.php

@@ -500,6 +500,34 @@ final class LibraryMakeGlobalAbilityTest extends TestCase
         }
     }
 
+    /** Re-review: a failure on page 2+ after its backup keeps the backup sentence in hint and message (P14). */
+    public function testAFailureMidwayAfterABackupKeepsTheBackupSentence(): void
+    {
+        $this->givenCopiesOf1058();
+        $jobs = get_post(9);
+        $jobs->post_status = 'publish';
+        LibraryFixtures::given([$this->page, LibraryFixtures::item(1058), get_post(8), $jobs]);
+        Functions\when('wp_revisions_enabled')->justReturn(false);
+
+        try {
+            $this->ability([], true, false, [null, WriteFailed::rolledBack('Grund.')])
+                ->execute(self::targets(['s0'], ['s1'], true));
+            self::fail('no WriteFailed');
+        } catch (WriteFailed $e) {
+            $error = $e->toError();
+            self::assertSame(9, $e->details['failed_post']);
+            self::assertSame([8], $e->details['changed_posts']);
+            self::assertSame(1071, $e->details['backup_id']);
+            self::assertStringContainsString(
+                sprintf(VisibleEditsTest::KEPT, 1071, 'der Seite'),
+                $error->get_error_data()['hint']
+            );
+            self::assertStringContainsString('lit/library-find-similar', $error->get_error_data()['hint']);
+            self::assertStringContainsString('Sicherung 1071 im Papierkorb', Errors::clientMessage($error));
+        }
+        self::assertCount(2, $this->backups);
+    }
+
     /** A failure on page N: the pages before stay replaced (each with revision), the rest untouched – all named. */
     public function testAFailureMidwayReportsEveryPage(): void
     {