feat: 首页支持风景图与纯色背景随滑动自动切换，优化点赞图标样式与交互

client/src/storage/appStorage.ts

@@ -70,6 +70,7 @@ export async function setReaction(contentId: string, reaction: Reaction): Promis
 }
 
 export type FavoriteItem = {
+  favId: string; // 唯一标识，支持重复点赞同一文案
   id: string;
   date: string;
   themeMode: ThemeMode;
@@ -82,15 +83,15 @@ export async function getFavorites(): Promise<FavoriteItem[]> {
 
 export async function addFavorite(item: FavoriteItem): Promise<void> {
   const list = await getFavorites();
-  if (list.some(i => i.id === item.id)) return;
+  // 允许重复点赞，不再根据 id 去重
   const newList = [item, ...list];
   console.log('Adding to favorites, new list size:', newList.length);
   await setJson(KEY_FAVORITES_ITEMS, newList);
 }
 
-export async function removeFavorite(contentId: string): Promise<void> {
+export async function removeFavorite(favId: string): Promise<void> {
   const list = await getFavorites();
-  const next = list.filter(item => item.id !== contentId);
+  const next = list.filter(item => item.favId !== favId);
   await setJson(KEY_FAVORITES_ITEMS, next);
 }