feat(fence): add height selection for fence panels and update related logic

- Introduced a new section in the UI for selecting fence heights, visible only when the fence option is enabled.
- Updated the fence label to clarify the presence of gates.
- Enhanced the JavaScript logic to manage the visibility of fence heights based on user selection.
- Modified the fence rendering logic to accommodate different heights and ensure proper visibility based on the selected height.
- Updated CSS to style the new fence height controls appropriately.
- Adjusted the model configuration to reflect changes in the fence height options.

locenice/js/bootstrap.js

@@ -17,7 +17,7 @@ try{
    document.getElementById('stdSavedState').textContent=JSON.stringify({selection:payload.selection});
  }catch(error){console.warn('Invalid shared selection:',error);}
  window.LOCENICE_RESOURCES={config,catalog,assets,references,scene,site,modelBytes};
- await import('./app.js?v=20261026');
+ await import('./app.js?v=20261026e');
 }catch(error){
  console.error(error);const box=document.getElementById('loading');box.className='error';box.innerHTML='<div class="errorDetail"></div><p>Nahrajte celou slozku vcetne js, css, data, models a assets. Otevrete ji pres HTTP(S), nikoli dvojklikem na HTML.</p><a href="./models/dum.glb" download>Stahnout model GLB</a>';
  box.querySelector('.errorDetail').textContent=error.message;document.getElementById('webStatus').textContent='Chyba nacitani';