feat(viewer): waterfall feed with lazy load, filter and new-photo hint

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/viewer/src/i18n/locales/en.ts

@@ -3,10 +3,14 @@ export default {
   home: { hint: 'Open an album link to start viewing' },
   album: {
     loading: 'Loading…',
+    loadingMore: 'Loading more…',
     emptyNotice: 'Photos coming soon',
     time: 'Time',
     venue: 'Venue',
     categories: 'Categories',
+    all: 'All',
+    end: 'You have reached the end',
+    newPhotos: 'New photos — tap to refresh',
     retry: 'Retry',
   },
   lang: { switch: 'Switch language' },

apps/viewer/src/i18n/locales/zh-CN.ts

@@ -3,10 +3,14 @@ export default {
   home: { hint: '打开相册链接即可观看' },
   album: {
     loading: '加载中…',
+    loadingMore: '加载更多…',
     emptyNotice: '照片即将上线',
     time: '时间',
     venue: '地点',
     categories: '分类',
+    all: '全部',
+    end: '已经到底了',
+    newPhotos: '有新照片，点击查看',
     retry: '重试',
   },
   lang: { switch: '切换语言' },