fix(*): 资源与技能 - 精简列表载荷并禁止对象存储静默降级

backend/internal/app/resource.go

@@ -15,7 +15,6 @@ import (
 	_ "image/png"
 	"infinite-canvas/backend/internal/kernel"
 	"io"
-	"log"
 	"mime"
 	"mime/multipart"
 	"net/http"
@@ -432,10 +431,9 @@ func writeLocalResourceObject(filePath string, body io.Reader) error {
 	return closeErr
 }
 
-// A cloud write is successful only after the configured origin accepts it.
-// storeResourceObject writes to the configured origin and degrades to local storage
-// when the external origin is unavailable. The resource binding is rewritten before
-// the caller persists the ready state, so later reads follow the actual object location.
+// storeResourceObject writes to the configured origin. When object storage is
+// enabled, a failed origin write must fail the resource instead of silently
+// changing its storage location to local disk.
 func (s *Service) storeResourceObject(resource *model.Resource, fileName string, body io.Reader) (string, error) {
 	if resource == nil {
 		return "", errors.New("资源不存在")
@@ -444,35 +442,14 @@ func (s *Service) storeResourceObject(resource *model.Resource, fileName string,
 		return "", writeLocalResourceObject(filepath.Join(s.dataDir, "resources", filepath.FromSlash(resource.ObjectKey)), body)
 	}
 	setting, settingErr := s.ossSettingForResource(resource.UserID, resource)
-	var etag string
-	var putErr error
-	if settingErr == nil {
-		etag, putErr = putOSSObject(setting, resource.ObjectKey, resource.MimeType, resource.Size, body)
+	if settingErr != nil {
+		return "", settingErr
 	}
-	if putErr == nil && settingErr == nil {
-		return etag, nil
+	etag, err := putOSSObject(setting, resource.ObjectKey, resource.MimeType, resource.Size, body)
+	if err != nil {
+		return "", err
 	}
-	fallbackErr := putErr
-	if fallbackErr == nil {
-		fallbackErr = settingErr
-	}
-	if seeker, ok := body.(io.Seeker); ok {
-		if _, seekErr := seeker.Seek(0, io.SeekStart); seekErr != nil {
-			return "", errors.Join(fallbackErr, fmt.Errorf("降级本地存储时重置读取位置失败：%w", seekErr))
-		}
-	}
-	localKey := localObjectKey(resource.UserID, resource.Kind, fileName, resource.MimeType, time.Now())
-	resource.Provider = "local"
-	resource.ObjectKey = localKey
-	resource.Endpoint = ""
-	resource.Bucket = ""
-	resource.StorageSettingID = ""
-	resource.ETag = ""
-	if localErr := writeLocalResourceObject(filepath.Join(s.dataDir, "resources", filepath.FromSlash(localKey)), body); localErr != nil {
-		return "", errors.Join(fallbackErr, fmt.Errorf("降级本地存储失败：%w", localErr))
-	}
-	log.Printf("object storage upload degraded to local storage: resource=%s error=%v", resource.ID, fallbackErr)
-	return "", nil
+	return etag, nil
 }
 
 func (s *Service) retryStoredResource(userID string, resource *model.Resource, kind string, mimeType string, size int64, body io.Reader) (*model.Resource, error) {