使用了AI重构项目，并完善了一部分后台问题

main_test.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
+
+func TestProxyAPIRequestUsesConfiguredPort(t *testing.T) {
+	backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"path":"` + r.URL.RequestURI() + `"}`))
+	}))
+	defer backend.Close()
+
+	backendURL, err := url.Parse(backend.URL)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, port, err := net.SplitHostPort(backendURL.Host)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+	router.Any("/api/*path", proxyAPIRequest(port))
+	recorder := httptest.NewRecorder()
+	router.ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/api/config?custom=1", nil))
+
+	if recorder.Code != http.StatusOK || recorder.Body.String() != `{"path":"/api/config?custom=1"}` {
+		t.Fatalf("unexpected proxy response: status=%d body=%s", recorder.Code, recorder.Body.String())
+	}
+}