🎨 优化上游ai兼容性，修复newapi返回token为空的问题

server/service/app/ai_proxy.go

@@ -48,6 +48,15 @@ func (s *AiProxyService) ProcessChatCompletion(ctx context.Context, req *request
 	}
 
 	// 4. 处理响应并收集正则日志
+	if resp != nil {
+		// 统一填充 standard_usage，方便上游使用统一格式解析
+		resp.StandardUsage = &response.ChatCompletionUsage{
+			PromptTokens:     resp.Usage.PromptTokens,
+			CompletionTokens: resp.Usage.CompletionTokens,
+			TotalTokens:      resp.Usage.TotalTokens,
+		}
+	}
+
 	if preset != nil && injector != nil && len(resp.Choices) > 0 {
 		resp.Choices[0].Message.Content = injector.ProcessResponse(resp.Choices[0].Message.Content)