feat(未讀消息數據結構優化): 更新多個接口和數據結構，將unreadCount移入config對象中，並調整相關邏輯以支持新結構，提升代碼可讀性和維護性。

Touchkebao/src/store/module/weChat/weChat.ts

@@ -143,7 +143,10 @@ export const useWeChatStore = create<WeChatState>()(
         set({ currentMessages: [], openTransmitModal: false });
         clearUnreadCount([contract.id]).then(() => {
           if (isExist) {
-            updateChatSession({ ...contract, unreadCount: 0 });
+            updateChatSession({
+              ...contract,
+              config: { unreadCount: 0 },
+            });
           } else {
             addChatSession(contract);
           }

Touchkebao/src/store/module/websocket/websocket.ts

@@ -392,7 +392,7 @@ export const useWebSocketStore = createPersistStore<WebSocketState>(
 
         set({
           messages: [...currentState.messages, newMessage],
-          unreadCount: currentState.unreadCount + 1,
+          unreadCount: currentState.config.unreadCount + 1,
         });
         //消息处理器
         msgManageCore(data);