fix(containers): fall back to image tag when version metadata is empty

src/lib/containers/install.go

@@ -47,6 +47,10 @@ func InstallContainer(ctx context.Context, item types.RegistryContainer) error {
 	}
 
 	// 2.5. Persist install metadata so installed-but-not-running state can be tracked without Docker lookups
+	// The version is required for update detection; fall back to the image tag when the payload omitted it.
+	if item.Version == "" {
+		item.Version = imageTag(item.Image)
+	}
 	metadata := types.InstalledMetadata{
 		RegistryContainer: item,
 		InstalledAt:       time.Now().UTC().Format(time.RFC3339),