qtgui: expose Reset for Geometry numeric controls

src/qtgui/GeometryPanel.cpp

@@ -203,7 +203,7 @@ void GeometryPanel::setupUi() {
       "allows it anywhere inside the image, and values above 1 allow it "
       "proportionally outside the image. Useful when a scanner image is a "
       "crop far from the scanner lens optical axis.",
-      QStringLiteral("geometry.fit.lens_center_distance"));
+      QStringLiteral("geometry.fit.lens_center_distance"), true);
 
   m_lensMessageLabel = new QLabel();
   configureDynamicStatusLabel(
@@ -259,7 +259,7 @@ void GeometryPanel::setupUi() {
       "Continuous rotation in degrees in the libcolorscreen final plane. "
       "Unlike scan rotation this is not restricted to 90-degree steps and is "
       "saved in the parameter file.",
-      QStringLiteral("geometry.final.rotation"));
+      QStringLiteral("geometry.final.rotation"), true);
   QCheckBox *finalMirrorCheck = addCheckboxParameter(
       "Mirror final image",
       [](const ParameterState &s) { return s.scrToImg.final_mirror; },

src/qtgui/WorkspaceChurnSmoke.cpp

@@ -787,6 +787,18 @@ if (!workflowSummary || !workflowToggle || !workflowStages ||
               "Geometry stable keys crossed the document/UI-state boundary"));
           return;
         }
+        const QStringList geometryDefaultKeys = {
+            QStringLiteral("geometry.fit.lens_center_distance"),
+            QStringLiteral("geometry.final.rotation")};
+        for (const QString &key : geometryDefaultKeys) {
+          QToolButton *reset = findParameterResetButton(key);
+          if (!reset || !reset->property("parameterDefaultValue").isValid()) {
+            fail(QStringLiteral(
+                     "Workspace churn lost Geometry default/reset metadata for %1")
+                     .arg(key));
+            return;
+          }
+        }
 
         // Image Layer is another complete stable-key panel. Its source choice
         // and RGB-mix values are saved ParameterState; the three area/channel