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),

src/lib/containers/installed.go

@@ -37,6 +37,12 @@ func (cache *ContainerCache) LoadInstalledContainers() error {
 			continue
 		}
 
+		// Older install records left the version empty; fall back to the image tag
+		// so update detection has something to compare against.
+		if metadata.Version == "" {
+			metadata.Version = imageTag(metadata.Image)
+		}
+
 		cache.AddService(types.Container{
 			ServiceName: name,
 			Name:        metadata.Name,