feat: add registry config, image upload/download, and OCI format support

Backend:
- Add registry_address configuration API (GET/POST)
- Add tar image upload with OCI and Docker format support
- Add image download with streaming optimization
- Fix blob download using c.Send (Fiber v3 SendStream bug)
- Add registry_address prefix stripping for all OCI v2 endpoints
- Add AGENTS.md for project documentation

Frontend:
- Add settings store with Snackbar notifications
- Add image upload dialog with progress bar
- Add download state tracking with multi-stage feedback
- Replace alert() with MUI Snackbar messages
- Display image names without registry_address prefix

🤖 Generated with [Qoder](https://qoder.com)

internal/module/registry/registry.go

@@ -13,13 +13,13 @@ import (
 )
 
 func Registry(ctx context.Context, db *gorm.DB, store store.Store) fiber.Handler {
-	// ???????
 	if err := db.AutoMigrate(
 		&model.Repository{},
 		&model.Blob{},
 		&model.Manifest{},
 		&model.Tag{},
 		&model.BlobUpload{},
+		&model.RegistryConfig{},
 	); err != nil {
 		log.Fatalf("failed to migrate database: %v", err)
 	}