fix(sync): 丢弃缺少 videoId 的同步记录,避免整页崩溃

服务端同步恢复回来的记录不保证结构完整(旧结构或半截写入)。缺少 videoId
的记录会让 HistoryItem.tsx:24 与 FavoritesItem.tsx:21 在渲染期拼播放地址
时对 undefined 调用 toString(),抛出未捕获异常。由于 getVideoUrl() 是在
渲染 href 时调用的,React 会直接卸载整棵树,首页白屏且刷新无效——该账号
只能靠直接改库才能恢复。

新增 lib/utils/sync-records.ts 做可渲染性判定(要求 videoId、source、
title 齐备),在云端拉取入口 useCloudSync 与 HistoryList / FavoritesList
各过滤一次:脏数据进不来,已经落库的也渲染不出来。

lib/hooks/useCloudSync.ts

@@ -1,6 +1,7 @@
 import { useState, useCallback } from 'react';
 import { useHistoryStore, usePremiumHistoryStore } from '@/lib/store/history-store';
 import { useFavoritesStore, usePremiumFavoritesStore } from '@/lib/store/favorites-store';
+import { keepRenderableFavorites, keepRenderableHistory } from '@/lib/utils/sync-records';
 import { getProfileId } from '@/lib/store/auth-store';
 
 export function useCloudSync(isPremium = false) {
@@ -19,11 +20,14 @@ export function useCloudSync(isPremium = false) {
       const result = await response.json();
 
       if (result.success && result.data) {
-        if (result.data.history?.length > 0) {
-          historyStore.getState().importHistory(result.data.history);
+        const history = keepRenderableHistory(result.data.history);
+        const favorites = keepRenderableFavorites(result.data.favorites);
+
+        if (history.length > 0) {
+          historyStore.getState().importHistory(history);
         }
-        if (result.data.favorites?.length > 0) {
-          favoritesStore.getState().importFavorites(result.data.favorites);
+        if (favorites.length > 0) {
+          favoritesStore.getState().importFavorites(favorites);
         }
       }
     } catch (error) {

lib/utils/sync-records.ts

@@ -0,0 +1,32 @@
+import type { FavoriteItem, VideoHistoryItem } from '@/lib/types';
+
+function hasIdentity(value: unknown): boolean {
+  if (!value || typeof value !== 'object') return false;
+  const record = value as { videoId?: unknown; source?: unknown; title?: unknown };
+  const videoId = record.videoId;
+  const hasVideoId = typeof videoId === 'string' ? videoId.length > 0 : typeof videoId === 'number';
+
+  return hasVideoId && typeof record.source === 'string' && typeof record.title === 'string';
+}
+
+/**
+ * Records restored from server-side sync are not guaranteed to be well formed —
+ * they may come from an older schema or a partial write. Rendering one without
+ * `videoId` throws while building the player URL, which takes down the whole
+ * page, so anything lacking a usable identity is dropped on the way in.
+ */
+export function isRenderableHistoryItem(value: unknown): value is VideoHistoryItem {
+  return hasIdentity(value);
+}
+
+export function isRenderableFavoriteItem(value: unknown): value is FavoriteItem {
+  return hasIdentity(value);
+}
+
+export function keepRenderableHistory(items: unknown): VideoHistoryItem[] {
+  return Array.isArray(items) ? items.filter(isRenderableHistoryItem) : [];
+}
+
+export function keepRenderableFavorites(items: unknown): FavoriteItem[] {
+  return Array.isArray(items) ? items.filter(isRenderableFavoriteItem) : [];
+}