Revert "feat: configure Kanban login by operator email"

This reverts commit 508fa03664.

local/static/kanban.js

@@ -73,7 +73,7 @@ async function move(order,state){
   let reason='';if(state==='cor'){reason=prompt('Motivo da correção:');if(!reason)return;}
   await api('/orders/'+order.id+'/move',{state,version:order.version,reason});await load();
 }
-$('login').onsubmit=async e=>{e.preventDefault();try{await api('/login',{email:$('email').value,password:$('password').value});await load();}catch(error){$('status').textContent=error.message;}finally{$('password').value='';}};
+$('login').onsubmit=async e=>{e.preventDefault();try{await api('/login',{username:$('user').value,password:$('password').value});await load();}catch(error){$('status').textContent=error.message;}finally{$('password').value='';}};
 $('logout').onclick=async()=>{await api('/logout',{});for(const key of Object.keys(localStorage))if(key.startsWith('dtf-'))localStorage.removeItem(key);location.reload();};
 $('refresh').onclick=load;
 load();