fix: recognize displayed terminal versions and clean obsolete gallery remnants

pigway_frame_flow/web/app.js

@@ -47,7 +47,6 @@ function operationResultHTML(o){
  if(o.error)parts.push(`<div class="history-status bad">${esc(operationErrorMessage(o.error))}</div>`);
  return parts.join('')||'—';
 }
-function operationErrorLabel(error){if(!error?.code)return '';const label=t(error.code);return label===error.code?t('error'):label;}
 function deviceDisplayName(device){const name=device.name||device.id;return device.id==='living-room'&&['living-room','Living room'].includes(name)?t('livingRoom'):name;}
 function shell(){document.documentElement.lang=state.lang==='zh'?'zh-CN':'en';$('#lang').textContent=state.lang==='zh'?'EN':'中文';$('#theme').title=t('theme');$('#nav').innerHTML=Object.entries(icons).filter(([id])=>id!=='source-browser').map(([id,icon])=>`<button data-page="${id}" class="${(id===state.page||id==='gallery'&&state.page==='source-browser')?'active':''}" ${(id===state.page||id==='gallery'&&state.page==='source-browser')?'aria-current="page"':''}><span class="nav-icon">${icon}</span><span>${t(id)}</span></button>`).join('');document.querySelectorAll('[data-page]').forEach(b=>b.onclick=()=>navigate(b.dataset.page));$('#page-title').textContent=t(state.page);const watchSelected=state.page==='terminal-gallery'&&state.tab==='watch';$('#device').innerHTML=(state.devices.length?state.devices:[{id:state.device,name:state.device}]).map(d=>`<option value="${esc(d.id)}" ${!watchSelected&&d.id===state.device?'selected':''}>${esc(deviceDisplayName(d))}</option>`).join('')+`<option value="@watch" ${watchSelected?'selected':''}>${tr('手表 · 410×502','Watch · 410×502')}</option>`;revealCurrentNavigation();}
 function imageLoading(img){