Add a terminal name check when saving an element

Discussion #1157. IEC 61666 §4.1 requires each terminal to be
identified unambiguously within its object, so two terminals of one
element must not share a name.

On save, the element editor now:
- refuses to save when two terminals share a name, lists the names
  ("N ×3") and selects those terminals;
- warns, and still saves, when a terminal has no name. Folio reports,
  conductor definitions and thumbnails are skipped.

Names are compared after trimming surrounding spaces, case sensitive.

Settings > General > Editor has a new checkbox, on by default, that
turns both checks off (elementeditor/check-terminal-names).

--check-elements applies the same rule: repeated names are a FAIL,
missing names a WARN. It ignores the setting, since it is an explicit
check. On the shipped collection this reports 82 FAILs, the elements
that repeat a terminal name today.

The rule lives in the header-only editor/terminalnamecheck.h, shared
by both, and is unit tested by tst_terminalnamecheck.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

sources/ui/configpage/generalconfigurationpage.cpp

@@ -25,6 +25,7 @@
 #include "../../utils/qetutils.h"
 #include "../../qetmessagebox.h"
 #include "../../textgrid.h"
+#include "../../editor/terminalnamecheck.h"
 #include "../nokde/kcolorbutton.h"
 #include <QFileDialog>
 #include <QFileInfo>
@@ -174,6 +175,7 @@ GeneralConfigurationPage::GeneralConfigurationPage(QWidget *parent) :
 	ui->MaxPartsElementEditorList_sb->setValue(settings.value("elementeditor/max-parts-element-editor-list", 200).toInt());
 	ui->ElementEditor_Grid_PointSize_min_sb->setValue(settings.value("elementeditor/grid_pointsize_min", 1).toInt());
 	ui->ElementEditor_Grid_PointSize_max_sb->setValue(settings.value("elementeditor/grid_pointsize_max", 1).toInt());
+	ui->m_check_terminal_names_cb->setChecked(settings.value(TerminalNameCheck::settings_key, true).toBool());
 
 	QString path = settings.value("elements-collections/common-collection-path", "default").toString();
 	if (path != "default")
@@ -286,6 +288,7 @@ void GeneralConfigurationPage::applyConf()
 	settings.setValue("elementeditor/max-parts-element-editor-list", ui->MaxPartsElementEditorList_sb->value());
 	settings.setValue("elementeditor/grid_pointsize_min", ui->ElementEditor_Grid_PointSize_min_sb->value());
 	settings.setValue("elementeditor/grid_pointsize_max", ui->ElementEditor_Grid_PointSize_max_sb->value());
+	settings.setValue(TerminalNameCheck::settings_key, ui->m_check_terminal_names_cb->isChecked());
 
 		//DIAGRAM VIEW
 	settings.setValue("diagramview/gestures", ui->m_use_gesture_trackpad->isChecked());

sources/ui/configpage/generalconfigurationpage.ui

@@ -1240,6 +1240,19 @@ Vous pouvez spécifier ici la valeur par défaut de ce champ pour les éléments
          </item>
         </layout>
        </item>
+       <item>
+        <widget class="QCheckBox" name="m_check_terminal_names_cb">
+         <property name="toolTip">
+          <string>À l'enregistrement d'un élément : refuser deux bornes portant le même nom, et signaler les bornes sans nom (IEC 61666).</string>
+         </property>
+         <property name="text">
+          <string>Vérifier les noms des bornes à l'enregistrement</string>
+         </property>
+         <property name="checked">
+          <bool>true</bool>
+         </property>
+        </widget>
+       </item>
        <item>
         <spacer name="verticalSpacer_6">
          <property name="orientation">
@@ -1275,6 +1288,7 @@ Vous pouvez spécifier ici la valeur par défaut de ce champ pour les éléments
   <tabstop>m_custom_tbt_path_cb</tabstop>
   <tabstop>m_highlight_integrated_elements</tabstop>
   <tabstop>m_default_elements_info</tabstop>
+  <tabstop>m_check_terminal_names_cb</tabstop>
   <tabstop>m_lang_cb</tabstop>
   <tabstop>m_dyn_text_font_pb</tabstop>
   <tabstop>m_dyn_text_rotation_sb</tabstop>