feat(weChat): 添加联系人存在检查逻辑并优化消息处理

在setCurrentContact方法中添加isExist参数，用于区分新增联系人和已存在联系人的处理逻辑
优化消息处理流程，确保未读消息计数正确更新

Cunkebao/src/pages/pc/ckbox/components/SidebarMenu/MessageList/index.tsx

@@ -13,7 +13,7 @@ const MessageList: React.FC<MessageListProps> = () => {
   const { setCurrentContact, currentContract } = useWeChatStore();
   const chatSessions = useCkChatStore(state => state.chatSessions);
   const onContactClick = (session: ContractData | weChatGroup) => {
-    setCurrentContact(session);
+    setCurrentContact(session, true);
   };
   return (
     <div className={styles.messageList}>

Cunkebao/src/store/module/weChat/weChat.data.ts

@@ -11,7 +11,10 @@ export interface WeChatState {
   messagesLoading: boolean;
 
   // Actions
-  setCurrentContact: (contract: ContractData | weChatGroup) => void;
+  setCurrentContact: (
+    contract: ContractData | weChatGroup,
+    isExist?: boolean,
+  ) => void;
   loadChatMessages: (contact: ContractData | weChatGroup) => Promise<void>;
 
   // 视频消息处理方法

Cunkebao/src/store/module/weChat/weChat.ts

@@ -6,8 +6,8 @@ import { clearUnreadCount, updateConfig } from "@/pages/pc/ckbox/api";
 import { ContractData, weChatGroup } from "@/pages/pc/ckbox/data";
 import {
   addChatSession,
-  getChatSessions,
   updateChatSession,
+  useCkChatStore,
 } from "@/store/module/ckchat/ckchat";
 
 export const useWeChatStore = create<WeChatState>()(
@@ -19,12 +19,19 @@ export const useWeChatStore = create<WeChatState>()(
       messagesLoading: false,
 
       // Actions
-      setCurrentContact: (contract: ContractData | weChatGroup) => {
+      setCurrentContact: (
+        contract: ContractData | weChatGroup,
+        isExist?: boolean,
+      ) => {
         const state = useWeChatStore.getState();
         // 切换联系人时清空当前消息，等待重新加载
         set({ currentMessages: [] });
         clearUnreadCount([contract.id]).then(() => {
-          addChatSession(contract);
+          if (isExist) {
+            updateChatSession({ ...contract, unreadCount: 0 });
+          } else {
+            addChatSession(contract);
+          }
           set({ currentContract: contract });
           updateConfig({
             id: contract.id,
@@ -83,12 +90,14 @@ export const useWeChatStore = create<WeChatState>()(
           }));
         } else {
           //更新消息列表unread数值，根据接收的++1 这样
-          const chatSessions = getChatSessions();
+          const chatSessions = useCkChatStore.getState().chatSessions;
           const session = chatSessions.find(
             item => item.id == message.wechatFriendId,
           );
-          session.unreadCount = Number(session.unreadCount) + 1;
-          updateChatSession(session);
+          if (session) {
+            session.unreadCount = Number(session.unreadCount) + 1;
+            updateChatSession(session);
+          }
         }
       },