fix(openai): support remote compact task

backend/internal/server/routes/gateway_test.go

@@ -0,0 +1,51 @@
+package routes
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/handler"
+	servermiddleware "github.com/Wei-Shaw/sub2api/internal/server/middleware"
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/require"
+)
+
+func newGatewayRoutesTestRouter() *gin.Engine {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+
+	RegisterGatewayRoutes(
+		router,
+		&handler.Handlers{
+			Gateway:       &handler.GatewayHandler{},
+			OpenAIGateway: &handler.OpenAIGatewayHandler{},
+			SoraGateway:   &handler.SoraGatewayHandler{},
+		},
+		servermiddleware.APIKeyAuthMiddleware(func(c *gin.Context) {
+			c.Next()
+		}),
+		nil,
+		nil,
+		nil,
+		nil,
+		&config.Config{},
+	)
+
+	return router
+}
+
+func TestGatewayRoutesOpenAIResponsesCompactPathIsRegistered(t *testing.T) {
+	router := newGatewayRoutesTestRouter()
+
+	for _, path := range []string{"/v1/responses/compact", "/responses/compact"} {
+		req := httptest.NewRequest(http.MethodPost, path, strings.NewReader(`{"model":"gpt-5"}`))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+
+		router.ServeHTTP(w, req)
+		require.NotEqual(t, http.StatusNotFound, w.Code, "path=%s should hit OpenAI responses handler", path)
+	}
+}