fix: 聊天模型列表仅返回 OpenAi 类型

在 Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application/Services/Chat/AiChatService.cs 中，为查询添加了 .Where(x => x.ModelApiType == ModelApiTypeEnum.OpenAi) 过滤，确保只返回 ModelType 为 Chat 且 ModelApiType 为 OpenAi 的模型，避免将非 OpenAi 的模型纳入聊天模型列表。

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application/Services/Chat/AiChatService.cs

@@ -73,6 +73,7 @@ public class AiChatService : ApplicationService
     {
         var output = await _aiModelRepository._DbQueryable
             .Where(x => x.ModelType == ModelTypeEnum.Chat)
+            .Where(x=>x.ModelApiType==ModelApiTypeEnum.OpenAi)
             .OrderByDescending(x => x.OrderNum)
             .Select(x => new ModelGetListOutput
             {