helm: align Hub chart with v0.3.12 manifests

[danish9039]

Summary of Changes

Aligns the existing Hub Helm chart parity values with the v0.3.12 Kustomize manifests introduced by #3548.

• updates Hub server and UI default/CI image tags from v0.3.10 to v0.3.12
• mirrors the new kubeflow source-namespace restriction in the Istio comparison values
• restores the repository-wide Helm/Kustomize comparison matrix

This is a focused parity repair. Extending scripts/synchronize-hub-manifests.sh to update Helm surfaces remains separate follow-up work.

Dependencies

None. This follows the upstream Hub synchronization in #3548.

Related Issues

This unblocks the shared comparison workflow on #3480, #3525, and #3524.

Validation

• helm lint experimental/helm/charts/hub/ with Helm v4.2.2
• ./tests/helm_kustomize_compare_all.sh hub
• ./tests/helm_kustomize_compare_all.sh
• git diff --check

The complete repository comparison matrix passes locally under Helm v4.2.2 and Kustomize v5.8.1.

Contributor Checklist

• I have tested these changes with Kustomize through the Helm/Kustomize comparison matrix.
• All commits are signed off to satisfy the DCO check.
• I have considered adding my company to the adopters page.

[github-actions]

Welcome to the Kubeflow Community Distribution Repository

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So in some cases you have to fix the problem in the upstream repositories first, but you can use a PR against kubeflow/community-distribution to test the platform integration.

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[Copilot]

Pull request overview

Aligns the Hub Helm chart with Hub v0.3.12 and restores Kustomize comparison compatibility.

Changes:

• Updates server and UI image tags to v0.3.12.
• Restricts internal Istio access to the kubeflow namespace.
• Removes trailing whitespace.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
experimental/helm/charts/hub/values.yaml	Updates the global image tag.
experimental/helm/charts/hub/ci/values-ui.yaml	Updates the base UI image tag.
experimental/helm/charts/hub/ci/values-ui-standalone.yaml	Updates the standalone UI image tag.
experimental/helm/charts/hub/ci/values-ui-istio.yaml	Updates the Istio UI image tag.
experimental/helm/charts/hub/ci/values-ui-integrated.yaml	Updates the integrated UI image tag.
experimental/helm/charts/hub/ci/values-postgres.yaml	Updates the PostgreSQL scenario server tag.
experimental/helm/charts/hub/ci/values-istio.yaml	Adds the source-namespace restriction.
experimental/helm/charts/hub/ci/values-db.yaml	Updates the database scenario server tag.
experimental/helm/charts/hub/ci/ci-values.yaml	Updates the base comparison server tag.

[juliusvonkohout]

/lgtm
/approve

[google-oss-prow]

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This pull-request has been approved by: juliusvonkohout

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