diff --git a/backend/plugins/domain/upload/task/storage_migration.go b/backend/plugins/domain/upload/task/storage_migration.go
index e0d927e1..bf91c49a 100644
--- a/backend/plugins/domain/upload/task/storage_migration.go
+++ b/backend/plugins/domain/upload/task/storage_migration.go
@@ -12,7 +12,6 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/hex"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -121,7 +120,7 @@ func (h *MigrationHandler) Execute(ctx context.Context, payload []byte) (*contra
 		})
 	}
 
-	active, err := loadActiveStorageConfig(ctx)
+	active, err := uploadstorage.LoadStorageConfig(ctx)
 	if err != nil {
 		return nil, fmt.Errorf("load active storage config: %w", err)
 	}
@@ -130,7 +129,7 @@ func (h *MigrationHandler) Execute(ctx context.Context, payload []byte) (*contra
 		return nil, err
 	}
 	if target.Driver == active.Driver {
-		if err := saveActiveStorageConfig(ctx, target); err != nil {
+		if err := uploadstorage.SaveActiveConfig(ctx, target); err != nil {
 			return nil, fmt.Errorf("activate same-driver storage config: %w", err)
 		}
 		message := fmt.Sprintf("存储配置已更新，活动存储保持为 %s", target.Driver)
@@ -143,7 +142,7 @@ func (h *MigrationHandler) Execute(ctx context.Context, payload []byte) (*contra
 		return nil, fmt.Errorf("count source objects: %w", err)
 	}
 	if total == 0 {
-		if err := saveActiveStorageConfig(ctx, target); err != nil {
+		if err := uploadstorage.SaveActiveConfig(ctx, target); err != nil {
 			return nil, fmt.Errorf("activate empty storage config: %w", err)
 		}
 		message := fmt.Sprintf("当前存储没有需要迁移的对象，活动存储已切换为 %s", target.Driver)
@@ -162,7 +161,7 @@ func (h *MigrationHandler) Execute(ctx context.Context, payload []byte) (*contra
 		return nil, err
 	}
 
-	if err := saveActiveStorageConfig(ctx, target); err != nil {
+	if err := uploadstorage.SaveActiveConfig(ctx, target); err != nil {
 		return nil, fmt.Errorf("activate target storage: %w", err)
 	}
 	message := fmt.Sprintf("存储迁移完成，共迁移 %d 个对象，活动存储已切换为 %s", migrated, target.Driver)
@@ -170,33 +169,6 @@ func (h *MigrationHandler) Execute(ctx context.Context, payload []byte) (*contra
 	return &contracts.TaskResultDTO{Message: message}, nil
 }
 
-func loadActiveStorageConfig(ctx context.Context) (contracts.StorageConfigDTO, error) {
-	var val string
-	db := shared.GetDB(ctx)
-	if db != nil {
-		_ = db.Table("w_system_configs").Where("key = ?", "storage_config").Pluck("value", &val).Error
-	}
-	var cfg contracts.StorageConfigDTO
-	if val != "" {
-		_ = json.Unmarshal([]byte(val), &cfg)
-	}
-	return cfg, nil
-}
-
-func saveActiveStorageConfig(ctx context.Context, cfg contracts.StorageConfigDTO) error {
-	data, err := json.Marshal(cfg)
-	if err != nil {
-		return err
-	}
-	db := shared.GetDB(ctx)
-	if db == nil {
-		return errors.New("database not available")
-	}
-	return db.Table("w_system_configs").
-		Where("key = ?", "storage_config").
-		Update("value", string(data)).Error
-}
-
 func countStorageObjects(ctx context.Context) (int64, error) {
 	var count int64
 	db := shared.GetDB(ctx)
diff --git a/backend/plugins/domain/upload/task/storage_migration_config_test.go b/backend/plugins/domain/upload/task/storage_migration_config_test.go
new file mode 100644
index 00000000..f56bba10
--- /dev/null
+++ b/backend/plugins/domain/upload/task/storage_migration_config_test.go
@@ -0,0 +1,37 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package task
+
+import (
+	"Wavelet/plugins/domain/upload/shared"
+
+	"context"
+	"strings"
+	"testing"
+)
+
+// TestMigrationHandlerRejectsCorruptActiveConfig pins the failure path the task
+// package used to swallow. Its local loader discarded the read error and the
+// JSON parse error and returned a zero config with a nil error, so a migration
+// could proceed believing the active storage driver was simply unknown.
+func TestMigrationHandlerRejectsCorruptActiveConfig(t *testing.T) {
+	dbConn, cleanup := shared.SetupTestEnv(t)
+	defer cleanup()
+
+	if err := dbConn.Table("w_system_configs").
+		Where("key = ?", "storage_config").
+		Update("value", "{ this is not json").Error; err != nil {
+		t.Fatalf("corrupt stored config: %v", err)
+	}
+
+	payload := []byte(`{"target":{"driver":"s3","s3":{"region":"us-east-1","bucket":"dst"}}}`)
+
+	result, err := (&MigrationHandler{}).Execute(context.Background(), payload)
+	if err == nil {
+		t.Fatalf("Execute() = (%v, nil), want an error for an unparsable active config", result)
+	}
+	if !strings.Contains(err.Error(), "load active storage config") {
+		t.Errorf("Execute() error = %q, want it to name the failed active-config read", err)
+	}
+}