Missing custom template name validation

[jamest-portainer]

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• Yes, I've searched similar issues on GitHub.
• Yes, I've checked whether this issue is covered in the Portainer documentation or knowledge base.

Problem Description

Scenario 1 - Kube Template Create
Given I have a kubernetes environment
When I create a kubernetes custom template
And I add characters, which aren’t valid as a kubernetes label

Expected results
Then I should get a validation error This field must consist of lower-case alphanumeric characters, '.', '_' or '-', must start and end with an alphanumeric character and must be 63 characters or less (e.g. 'my-name', or 'abc-123').
And the create custom template button should be disabled.

Actual results
There are no validation errors
And I can create the custom template

Scenario 2 - Kube Template Edit
Given I have a kubernetes environment with a custom template
When I edit a kubernetes custom template
And I add characters, which aren’t valid as a kubernetes label

Expected results
Then I should get a validation error This field must consist of lower-case alphanumeric characters, '.', '_' or '-', must start and end with an alphanumeric character and must be 63 characters or less (e.g. 'my-name', or 'abc-123').
And the create custom template button should be disabled.

Actual results
There are no validation errors
And I can save the custom template

Scenario 3 - Docker Template Edit
Given I have a docker environment with a custom template
When I edit a docker custom template
And I add characters, which aren’t valid (This field must consist of lower-case alphanumeric characters, '_' or '-' (e.g. 'my-name', or 'abc-123').)

Expected results
Then I should get a validation error This field must consist of lower-case alphanumeric characters, '_' or '-' (e.g. 'my-name', or 'abc-123').
And the save custom template button should be disabled.

Actual results
There are no validation errors
And I can save the custom template

Scenario 4
Given I’m editing or creating a custom template
When I enter

Expected Behavior

See problem description.

Actual Behavior

See problem description.

Steps to Reproduce

See problem description.

Portainer logs or screenshots

No response

Portainer version

2.18.4

Portainer Edition

Community Edition (CE)

Platform and Version

Docker or Kubernetes

OS and Architecture

Any

Browser

No response

What command did you use to deploy Portainer?

No response

Additional Information

No response