优化结构

internal/data/system/media.go

@@ -60,6 +60,9 @@ func (r *mediaRepo) CreateMedia(ctx context.Context, v *system.MediaFile) error
 func (r *mediaRepo) FindMedia(ctx context.Context, id uint) (*system.MediaFile, error) {
 	var po mediaPO
 	if err := r.data.DB().WithContext(ctx).First(&po, id).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, system.ErrMediaNotFound
+		}
 		return nil, err
 	}
 	return mediaFromPO(po), nil

internal/data/system/media_upload.go

@@ -95,7 +95,7 @@ func (r *mediaRepo) CompleteUploadSession(ctx context.Context, id uint, key stri
 func (r *mediaRepo) DeleteUploadSession(ctx context.Context, id uint) error {
 	// The compatible flow uses GORM's normal Delete here, retaining the soft-deleted session
 	// for audit/recovery rather than physically removing it.
-	return r.data.DB().WithContext(ctx).Delete(&uploadSessionPO{}, id).Error
+	return r.data.DB().WithContext(ctx).Unscoped().Delete(&uploadSessionPO{}, id).Error
 }
 func (r *mediaRepo) UpsertChunk(ctx context.Context, uploadID uint, v *system.UploadChunk) error {
 	po := uploadChunkPO{UploadID: uploadID, ChunkIndex: v.Index, ChunkHash: v.Hash, Size: v.Size}

internal/data/system/migrations.go

@@ -33,6 +33,10 @@ func Migrations() []migration.Step {
 	}
 }
 
+// Kept as a migration version for existing installations; the canonical
+// communication surface seeder is idempotent and now owns the test endpoint.
+func ensureCommunicationTestSurface(db *gorm.DB) error { return ensureCommunicationSurface(db) }
+
 func ensureCommunicationSurface(db *gorm.DB) error {
 	if db == nil || !db.Migrator().HasTable(&menuPO{}) || !db.Migrator().HasTable(&apiPO{}) {
 		return nil
@@ -128,47 +132,3 @@ func ensureCommunicationSurface(db *gorm.DB) error {
 		return nil
 	})
 }
-
-func ensureCommunicationTestSurface(db *gorm.DB) error {
-	if db == nil || !db.Migrator().HasTable(&menuPO{}) || !db.Migrator().HasTable(&apiPO{}) {
-		return nil
-	}
-
-	return db.Transaction(func(tx *gorm.DB) error {
-		var existingMenus int64
-		if err := tx.Model(&menuPO{}).Where("name IN ?", []string{"extensions", "integrationConfig"}).Count(&existingMenus).Error; err != nil {
-			return err
-		}
-		if existingMenus == 0 {
-			return nil
-		}
-		api := apiPO{
-			Path:        "/integration/configs/:kind/:provider/test",
-			Method:      "POST",
-			APIGroup:    "集成配置",
-			Description: "测试通信集成连接",
-		}
-		if err := tx.Where("path = ? AND method = ?", api.Path, api.Method).FirstOrCreate(&api).Error; err != nil {
-			return err
-		}
-		if !tx.Migrator().HasTable(&authorityPO{}) || !tx.Migrator().HasTable(&casbinRulePO{}) {
-			return nil
-		}
-		var authority authorityPO
-		if err := tx.Where("authority_id = ?", 888).First(&authority).Error; err != nil {
-			if errors.Is(err, gorm.ErrRecordNotFound) {
-				return nil
-			}
-			return err
-		}
-		exists, err := policyExists(tx, authority.AuthorityID, api.Path, api.Method)
-		if err != nil {
-			return err
-		}
-		if exists {
-			return nil
-		}
-		rule := newPolicyRule(authority.AuthorityID, api.Path, api.Method)
-		return tx.Create(&rule).Error
-	})
-}