feat: 重构核心租住流程页面与交互体验

统一注册、看房、申请与入住等核心页面的视觉和流程衔接，补齐支付、签约与状态流转闭环，提升移动端操作连贯性。

utils/reservation-flow.js

@@ -1,8 +1,9 @@
 const RESERVATION_FLOW_STEP = {
-  INSPECTION: 10,
-  BILL: 20,
-  CONTRACT: 30,
-  CHECKIN: 40
+  APPLICATION: 1,
+  INSPECTION: 2,
+  BILL: 3,
+  CONTRACT: 4,
+  CHECKIN: 5
 }
 
 function getLanguage(language) {
@@ -92,6 +93,23 @@ export function getReservationCurrentNode(flow = {}) {
   return nodes.find(item => item.isCurrent) || nodes[nodes.length - 1]
 }
 
+export function hasEffectiveReservationFlow(flow = {}) {
+  const currentNode = getReservationCurrentNode(flow)
+  if (!currentNode) {
+    return false
+  }
+
+  const step = Number(currentNode.step || 0)
+  const refNo = String(currentNode.refNo || '').trim()
+
+  // 当前步骤为申请单（1）且没有 refNo 时，视为尚未提交预约单
+  if (step === 1 && !refNo) {
+    return false
+  }
+
+  return step > 0
+}
+
 export function buildReservationFlowMap(flowList = []) {
   return normalizeArray(flowList)
     .filter(item => item && typeof item === 'object')