added files in git

src/stores/chatPostStore.js

@@ -0,0 +1,17 @@
+const postByChatId = new Map();
+
+export function setPostForChat(chatId, post) {
+  postByChatId.set(chatId, post);
+}
+
+export function getPostForChat(chatId) {
+  return postByChatId.get(chatId);
+}
+
+export function cachePostsFromChats(chats) {
+  for (const chat of chats) {
+    if (chat.post) {
+      postByChatId.set(chat.id, chat.post);
+    }
+  }
+}