feat: 算力引擎 Go 后端核心（new-api）

- 统一 OpenAI 兼容 /v1 中继 + 渠道/额度/令牌/流水
- 各领域包：relay 模型网关、model 数据层、controller 管理 API

middleware/token_auto_groups_context_test.go

@@ -0,0 +1,48 @@
+package middleware
+
+import (
+	"net/http/httptest"
+	"testing"
+
+	"github.com/QuantumNous/new-api/common"
+	"github.com/QuantumNous/new-api/constant"
+	"github.com/QuantumNous/new-api/model"
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func newTokenAutoGroupsContext() *gin.Context {
+	gin.SetMode(gin.TestMode)
+	ctx, _ := gin.CreateTestContext(httptest.NewRecorder())
+	return ctx
+}
+
+func TestSetupContextForTokenPreservesCustomAutoGroupsOrder(t *testing.T) {
+	ctx := newTokenAutoGroupsContext()
+	token := &model.Token{Id: 1, UserId: 2, AutoGroups: `["vip","default"]`}
+
+	require.NoError(t, SetupContextForToken(ctx, token))
+	value, ok := common.GetContextKey(ctx, constant.ContextKeyTokenAutoGroups)
+	require.True(t, ok)
+	assert.Equal(t, []string{"vip", "default"}, value)
+}
+
+func TestSetupContextForTokenTreatsStoredEmptyArrayAsInheritance(t *testing.T) {
+	ctx := newTokenAutoGroupsContext()
+	token := &model.Token{Id: 1, UserId: 2, AutoGroups: `[]`}
+
+	require.NoError(t, SetupContextForToken(ctx, token))
+	_, ok := common.GetContextKey(ctx, constant.ContextKeyTokenAutoGroups)
+	assert.False(t, ok)
+}
+
+func TestSetupContextForTokenMalformedAutoGroupsFailsClosed(t *testing.T) {
+	ctx := newTokenAutoGroupsContext()
+	token := &model.Token{Id: 1, UserId: 2, AutoGroups: `not-json`}
+
+	require.NoError(t, SetupContextForToken(ctx, token))
+	value, ok := common.GetContextKey(ctx, constant.ContextKeyTokenAutoGroups)
+	require.True(t, ok)
+	assert.Equal(t, []string{}, value)
+}