fix: body index simplify childId checks use || '' fallback

cfc-frontend/pages/body/index.vue

@@ -287,12 +287,9 @@ export default {
               break
             }
           }
-          if (!found && self.children.length > 0) {
-            self.activeChildId = self.children[0].childId
-            self.activeChildName = self.children[0].name || self.children[0].nickname || '孩子'
-            uni.setStorageSync('currentChildId', self.activeChildId)
-          }
-          if (self.activeChildId) {
+          // FIX: 不再自动选择第一个孩子。仅在用户通过 UserQuickEntry 切换时设置 activeChildId
+          // 默认情况下，页面显示当前登录用户自己的数据（由 API 根据 token 推断）
+          if (found) {
             self.loadDashboardData()
           }
           self.loadContacts()
@@ -484,40 +481,24 @@ export default {
         return
       }
       if (item.page === 'health-dimensions') {
-        if (!this.activeChildId) {
-          uni.showToast({ title: '请先选择孩子', icon: 'none' })
-          return
-        }
-        uni.navigateTo({ url: '/pages/body-detail/health-dimensions?childId=' + this.activeChildId })
+        uni.navigateTo({ url: '/pages/body-detail/health-dimensions?childId=' + (this.activeChildId || '') })
         return
       }
       if (item.page) uni.navigateTo({ url: item.page })
     },
     goToHealthReport: function() {
-      var id = this.activeChildId || uni.getStorageSync('currentChildId')
-      if (!id) {
-        uni.showToast({ title: '请先选择成员', icon: 'none' })
-        return
-      }
+      var id = this.activeChildId || uni.getStorageSync('currentChildId') || ''
       uni.navigateTo({ url: '/pages/body-detail/health-report?childId=' + id })
     },
     goDimensionDetail: function(dimKey) {
       uni.navigateTo({ url: '/pages/body/dimension-detail?dimension=' + dimKey + '&childId=' + this.activeChildId })
     },
     goToCheckin: function() {
-      var id = this.activeChildId || uni.getStorageSync('currentChildId')
-      if (!id) {
-        uni.showToast({ title: '请先选择成员', icon: 'none' })
-        return
-      }
+      var id = this.activeChildId || uni.getStorageSync('currentChildId') || ''
       uni.navigateTo({ url: '/pages/body-detail/checkin?childId=' + id })
     },
     goToNutritionProfile: function() {
-      var id = this.activeChildId || uni.getStorageSync('currentChildId')
-      if (!id) {
-        uni.showToast({ title: '请先选择成员', icon: 'none' })
-        return
-      }
+      var id = this.activeChildId || uni.getStorageSync('currentChildId') || ''
       uni.navigateTo({ url: '/pages/health/nutrition-profile?childId=' + id })
     },
     goToUploadReport: function() {