feat(ticket): 新增单程票购票与检票功能，优化日志与接口

- 前端新增单程票购票界面，支持票种切换与区间选择、价格预览
- 完善后端检票接口，添加单程票的校验与处理逻辑
- 优化售票机脚本的车票类型映射，新增单程车票支持
- 简化前端售票日志输出，移除冗余站点信息字段
- 新增服务层付费区间计算字段，优化公共接口返回数据

ticketmachine.lua

@@ -250,6 +250,9 @@ local function normalizeTrainTypeLabel(v)
   if s == 'express' or s == 'limited_express' or s == 'limited express' then
     return 'Express'
   end
+  if s == 'single' then
+    return 'single'
+  end
   return 'Local'
 end
 
@@ -2090,10 +2093,13 @@ local function showDone()
   local toNameEnArg = tostring(toNameEn or '???')
   local fromNameCnUArg = tostring(fromNameCnU or '')
   local toNameCnUArg = tostring(toNameCnU or '')
+  local issueArgsType = 'local'
+  if state.trainType == 'Express' then issueArgsType = 'limited_express'
+  elseif state.trainType == 'single' then issueArgsType = 'single' end
   local issueArgs = {
     start_name_en = fromNameEnArg,
     terminal_name_en = toNameEnArg,
-    type = (state.trainType == 'Express') and 'limited_express' or 'local',
+    type = issueArgsType,
     rides = rides,
     cost = cost,
     start_station = startStationArg,
@@ -2113,7 +2119,9 @@ local function showDone()
     ts = (os.epoch and os.epoch('utc')) or (os.time() * 1000)
   }
 
-  local apiType = (state.trainType == 'Express') and 'limited_express' or 'local'
+  local apiType = 'local'
+  if state.trainType == 'Express' then apiType = 'limited_express'
+  elseif state.trainType == 'single' then apiType = 'single' end
   local localGeneratedTicketId = generateTicketId()
   local okIssueTicket, issuedTicketId, issueMethod = issueTicketFromPeripheral(
     fromNameEnArg,