fix(扫码打卡详情页): 修正注册参数赋值逻辑

新增扫码阶段注册来源常量，更新跳转欢迎页的注释说明，调整注册相关参数的赋值逻辑

@@ -68,6 +68,7 @@ import {
 
 
 const defaultCover =
 const defaultCover =
   'https://cdn.ipadbiz.cn/lls_prog/images/check_detail_img.png?imageMogr2/strip/quality/60'
   'https://cdn.ipadbiz.cn/lls_prog/images/check_detail_img.png?imageMogr2/strip/quality/60'
+const REGISTER_SOURCE_SCAN_STAGE = 'SCAN_STAGE'
 
 
 const detail = reactive({
 const detail = reactive({
   activityId: '',
   activityId: '',
@@ -127,9 +128,8 @@ const normalizedRichTextContent = computed(() => {
 })
 })
 
 
 const navigateToWelcome = () => {
 const navigateToWelcome = () => {
-  // 扫码入口沿用首页广告位的判断路线：
-  // 先判断是否有家庭，没有则先去 Welcome，再由 Welcome 决定补资料/创建家庭/加入家庭。
-  // 现在这条链路不再要求“完成后回到当前详情页继续扫码”，而是完成家庭准入后回首页。
+  // 扫码详情页缺少家庭时，沿用 Welcome -> AddProfile/建家庭/加家庭 的准入链路。
+  // 这里的来源归因固定表示“从扫码打卡详情页进入补资料”。
   const params = new URLSearchParams({
   const params = new URLSearchParams({
     reg_source: detail.regSource,
     reg_source: detail.regSource,
     reg_stage_id: detail.regStageId,
     reg_stage_id: detail.regStageId,
@@ -425,8 +425,8 @@ const initPage = options => {
     options.stage_id ||
     options.stage_id ||
     options.id ||
     options.id ||
     ''
     ''
-  detail.regSource = options.reg_source || ''
-  detail.regStageId = options.reg_stage_id || ''
+  detail.regSource = REGISTER_SOURCE_SCAN_STAGE
+  detail.regStageId = detailId
   detail.entrySceneRaw = sceneParams.rawScene || ''
   detail.entrySceneRaw = sceneParams.rawScene || ''
   detail.entryMode = resolveEntryMode(sceneParams, options)
   detail.entryMode = resolveEntryMode(sceneParams, options)
   detail.id = detailId
   detail.id = detailId