fix: minimax_service 修复编译错误

- 使用 resize.Lanczos3 替代不存在的 resize.Lanczos
- 使用 os.Getenv 替代缺失的 config 方法

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/services/assetService/service/minimax_service.go

@@ -14,6 +14,7 @@ import (
 	"net"
 	"net/http"
 	"net/url"
+	"os"
 	"strings"
 	"sync"
 	"time"
@@ -175,8 +176,8 @@ func (s *minimaxService) processJob(job *ImageGenerationJob) {
 
 // callMiniMaxAPI 调用 MiniMax API
 func (s *minimaxService) callMiniMaxAPI(model, prompt, aspectRatio string, refs []dto.SubjectReference, n int) ([]string, error) {
-	apiURL := s.config.GetMiniMaxAPIURL()
+	apiURL := os.Getenv("MINIMAX_API_URL")
-	apiKey := s.config.GetMiniMaxAPIKey()
+	apiKey := os.Getenv("MINIMAX_API_KEY")
 
 	payload := map[string]interface{}{
 		"model":             model,
@@ -260,7 +261,7 @@ func (s *minimaxService) compressImageIfNeeded(imageURL string) (string, error)
 		return "data:image/jpeg;base64," + base64.StdEncoding.EncodeToString(imgData), nil
 	}
 
-	resized := resize.Thumbnail(newWidth, newHeight, img, resize.Lanczos)
+	resized := resize.Thumbnail(newWidth, newHeight, img, resize.Lanczos3)
 
 	var buf bytes.Buffer
 	switch format {