change layout

static/js/components/townViewer.js

@@ -85,6 +85,10 @@ window.renderTowns = function() {
 
 window.selectTown = function(id) {
   window.selectedTownId = id;
+  window.selectedBuildingId = null;
+  const lbl = document.getElementById('selected-building-label');
+  if (lbl) lbl.textContent = '-- Επιλέξτε Κατασκευή --';
+
   window.renderTowns();
 
   document.getElementById('no-town-selected').style.display = 'none';