jfjoch_viewer: show "Multiple lattices detected" in image statistics

Add a row after the Indexing solution that flags images with more than
one indexed lattice (indexing_lattice_count > 1).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

viewer/widgets/JFJochViewerImageStatistics.cpp

@@ -123,6 +123,9 @@ JFJochViewerImageStatistics::JFJochViewerImageStatistics(QWidget *parent) : QWid
     indexed = new QLabel(this);
     layout->addRow(new QLabel("Indexing:"), indexed);
 
+    multiple_lattices = new QLabel(this);
+    layout->addRow(multiple_lattices);
+
     res_estimate = new QLabel(this);
     layout->addRow(new QLabel("Resolution estimate:"), res_estimate);
 
@@ -165,6 +168,7 @@ void JFJochViewerImageStatistics::loadImage(std::shared_ptr<const JFJochReaderIm
         bkg_estimate->setText("");
         indexed->setText("");
         indexed->setToolTip("");
+        multiple_lattices->setText("");
         b_factor->setText("");
         profile_radius_label->setText("");
         profile_radius->setText("");
@@ -359,4 +363,9 @@ void JFJochViewerImageStatistics::loadImage(std::shared_ptr<const JFJochReaderIm
     } else {
         indexed->setText("N/A");
     }
+
+    if (image->ImageData().indexing_lattice_count.value_or(0) > 1)
+        multiple_lattices->setText("<span style=\"color: red;\"><b>Multiple lattices detected</b></span>");
+    else
+        multiple_lattices->setText("");
 }

viewer/widgets/JFJochViewerImageStatistics.h

@@ -20,6 +20,7 @@ class JFJochViewerImageStatistics : public QWidget {
     QLabel *spots;
     QLabel *valid_values;
     QLabel *indexed;
+    QLabel *multiple_lattices;
     QLabel *bkg_estimate;
     QLabel *res_estimate;
     QLabel *masked_pixels;