fix: 尝试安卓优化

vite-tailwindcss/src/views/index/index.vue

@@ -628,7 +628,7 @@ import { toast } from '@/composables/useToast'
 import { pickMusicUrl, rememberMusicPick } from '@/utils/musicPick'
 import { getClientId } from '@/utils/clientId'
 import { sendVisitBeacon } from '@/utils/visitBeacon'
-import { optimizeImageUrl } from '@/composables/useAndroidOptimize'
+import { optimizeImageUrl, isIOS } from '@/composables/useAndroidOptimize'
 import { DANMAKU_COLORS, DANMAKU_GRADIENT_COLORS, DEFAULT_DANMAKU_COLOR, BLESSING_STYLES } from '@/utils/danmakuColors'
 import { parseLrc, formatAudioTime, findLrcIndex } from '@/utils/parseLrc'
 import CanvasEffects from '@/components/CanvasEffects.vue'
@@ -748,9 +748,10 @@ const likeBusy = ref(false)
 let likePulseTimer = null
 const previewVisible = ref(false), previewIndex = ref(0), albumLoaded = ref(false)
 const albumPreviewImages = ref([])
-/** 九宫格 / 一大五小：进视口中线后停滚再串行加载 */
+/** 九宫格 / 一大五小：进视口中线后停滚再串行加载
+ *  iOS 性能足够，跳过停滚，让组件进视口自动挂载（保留滚动连续性） */
 const HOLD_GALLERY_TYPES = new Set(['nine-grid', 'one-large-five-small'])
-const isHoldGalleryType = (type) => HOLD_GALLERY_TYPES.has(type)
+const isHoldGalleryType = (type) => !isIOS && HOLD_GALLERY_TYPES.has(type)
 const galleryActivate = reactive({})
 const galleryHold = ref(false)
 const rsvpForm = reactive({ name: '', guest_count: '1', wishes: '' })
@@ -1047,8 +1048,9 @@ const beginGalleryGate = (pIdx) => {
 }
 
 const onGalleryReady = (pIdx) => {
-  if (!galleryDone.has(pIdx)) return
+  // iOS 跳过 hold，但仍需刷新文档高度（图挂载后 scrollMax 可能变化）
   refreshScrollMax()
+  if (!galleryDone.has(pIdx)) return
   clearTimeout(galleryRevealTimer)
   galleryRevealTimer = setTimeout(() => {
     galleryHold.value = false
@@ -1066,7 +1068,7 @@ const bindGalleryHoldObserver = () => {
   galleryObserver = new IntersectionObserver(
     (entries) => {
       const vh = window.innerHeight || 1
-      const lineY = vh * (1 - 0.75) // 从下往上 75%
+      const lineY = vh * (1 - 0.9) // 从下往上 75%
       for (const entry of entries) {
         if (!entry.isIntersecting) continue
         const rect = entry.boundingClientRect