Report committed comparison cleanup failures

internal/app/comparison_test.go

@@ -85,6 +85,33 @@ func TestCompareDetailedPublishesPartialBundleAndReturnsAggregateError(t *testin
 	}
 }
 
+func TestCompareDetailedRetainsCommittedPathsWhenBackupCleanupFails(t *testing.T) {
+	bundle := generationBundle(t)
+	backupPath := filepath.Join(t.TempDir(), ".comparison-daily.backup-retained")
+	cleanupCause := errors.New("backup cleanup failed")
+	originalPublish := publishComparison
+	publishComparison = func(context.Context, comparison.DestinationPlan, comparison.LogicalBundle) (comparison.PublicationResult, error) {
+		return comparison.PublicationResult{Committed: true, RetainedBackupPath: backupPath}, &comparison.PublicationCleanupError{RetainedBackupPath: backupPath, Err: cleanupCause}
+	}
+	t.Cleanup(func() { publishComparison = originalPublish })
+
+	result, err := CompareDetailed(context.Background(), ComparisonRequest{
+		Config: comparisonConfig(), Report: ReportDaily, ProfileIDs: []string{"weather-light", "weather-deep"},
+		WorkingDir: t.TempDir(), Date: generationTime("2026-05-29T12:00:00-05:00"),
+		Clock:     timeutil.FixedClock{Time: generationTime("2026-05-29T08:30:00-05:00")},
+		Collector: &generationCollector{bundle: &bundle}, Executor: &generationExecutor{},
+	})
+	var cleanupErr *comparison.PublicationCleanupError
+	if result == nil || !errors.As(err, &cleanupErr) || !errors.Is(err, cleanupCause) || cleanupErr.RetainedBackupPath != backupPath || !filepath.IsAbs(result.ManifestPath) || !filepath.IsAbs(result.DataPackagePath) {
+		t.Fatalf("CompareDetailed() result/error = %#v/%v", result, err)
+	}
+	for _, profile := range result.Results {
+		if profile.Status == comparison.StatusSucceeded && !filepath.IsAbs(profile.ReportPath) {
+			t.Fatalf("published profile result = %#v", profile)
+		}
+	}
+}
+
 func TestCompareDetailedPreflightsBeforePromptOrCollection(t *testing.T) {
 	invalidDestination := filepath.Join(t.TempDir(), "not-a-directory")
 	if err := os.WriteFile(invalidDestination, []byte("x"), 0o600); err != nil {