fix(payment): 删除泄露内部 AI 渠道配置的废弃接口

Fixes #4160

backend/internal/handler/payment_handler.go

@@ -9,7 +9,6 @@ import (
 	dbent "github.com/Wei-Shaw/sub2api/ent"
 	"github.com/Wei-Shaw/sub2api/internal/payment"
 	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
-	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
 	middleware2 "github.com/Wei-Shaw/sub2api/internal/server/middleware"
 	"github.com/Wei-Shaw/sub2api/internal/service"
@@ -19,15 +18,13 @@ import (
 
 // PaymentHandler handles user-facing payment requests.
 type PaymentHandler struct {
-	channelService *service.ChannelService
 	paymentService *service.PaymentService
 	configService  *service.PaymentConfigService
 }
 
 // NewPaymentHandler creates a new PaymentHandler.
-func NewPaymentHandler(paymentService *service.PaymentService, configService *service.PaymentConfigService, channelService *service.ChannelService) *PaymentHandler {
+func NewPaymentHandler(paymentService *service.PaymentService, configService *service.PaymentConfigService) *PaymentHandler {
 	return &PaymentHandler{
-		channelService: channelService,
 		paymentService: paymentService,
 		configService:  configService,
 	}
@@ -91,17 +88,6 @@ func (h *PaymentHandler) GetPlans(c *gin.Context) {
 	response.Success(c, result)
 }
 
-// GetChannels returns enabled payment channels.
-// GET /api/v1/payment/channels
-func (h *PaymentHandler) GetChannels(c *gin.Context) {
-	channels, _, err := h.channelService.List(c.Request.Context(), pagination.PaginationParams{Page: 1, PageSize: 1000}, "active", "")
-	if err != nil {
-		response.ErrorFrom(c, err)
-		return
-	}
-	response.Success(c, channels)
-}
-
 // GetCheckoutInfo returns all data the payment page needs in a single call:
 // payment methods with limits, subscription plans, and configuration.
 // GET /api/v1/payment/checkout-info