add logic in _helpers.tpl when using sha256 of image

[chris7532]

No description provided.

[Copilot]

Pull request overview

This PR adds support for SHA256 image digests in the Kafka-UI Helm chart's image name template helper function. The change enables users to reference container images by their SHA256 digest instead of by tag, which provides immutable image references.

• Adds conditional logic to detect SHA256 digests in the image tag value
• Modifies the image name formatting to omit the colon separator when using SHA256 digests

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[Copilot]

The SHA256 digest handling logic is inconsistent. When no registry is specified, the code still uses the colon separator, which will produce an invalid image reference if the tag contains a SHA256 digest. The same conditional logic that was added for the registry case (lines 79-83) should also be applied here to handle SHA256 digests correctly.

Suggested change

	{{- else }}
	{{- printf "%s:%s" $repository $tag -}}
	{{- end }}
	{{- else }}
	{{- if contains "@sha256" $tag }}
	{{- printf "%s%s" $repository $tag -}}
	{{- else }}
	{{- printf "%s:%s" $repository $tag -}}
	{{- end }}
	{{- end }}

[Copilot]

The variable name '$tag' is misleading because it can now contain either a tag (with ':' separator) or a digest (with '@sha256:' prefix). Consider renaming it to something more generic like '$tagOrDigest' or '$imageIdentifier' to better reflect its dual purpose and improve code clarity.