fix cookie injection position

internal/upstream/client.go

@@ -254,7 +254,16 @@ body := map[string]interface{}{
 	req.Header.Set("Origin", "https://chat.z.ai")
 	req.Header.Set("Referer", fmt.Sprintf("https://chat.z.ai/c/%s", uuid.New().String()))
 	req.Header.Set("User-Agent", uarand.GetRandom())
-	
+	if sess, err := auth.GetAnonymousSession(); err == nil {
+		var cookieStrs []string
+		for _, c := range sess.Cookies {
+			cookieStrs = append(cookieStrs, c.Name+"="+c.Value)
+		}
+		req.Header.Set("Cookie", strings.Join(cookieStrs, "; "))
+	}
+
+	client := proxy.GetHTTPClient()
+	}
 
 	client := proxy.GetHTTPClient()
 	resp, err := client.Do(req)