fix(ui): fix DateTimePicker time input colors

[franzheidl]

Summary

Fix invisible arrows in DateTimePicker when in time selection mode, remove non-working raw colors with opacities, use plain solid theme colors instead.

Related Issues

Closes #1447

Screenshots (if applicable)

Testing Instructions

None, this is a purely cosmetic/visual change.

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.
• I have created a changeset for my changes.

[changeset-bot]

🦋 Changeset detected

Latest commit: 21a9fe8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 9 packages

Name	Type
@cloudoperators/juno-ui-components	Patch
@cloudoperators/juno-app-carbon	Patch
@cloudoperators/juno-app-doop	Patch
@cloudoperators/juno-app-example	Patch
@cloudoperators/juno-app-greenhouse	Patch
@cloudoperators/juno-app-heureka	Patch
@cloudoperators/juno-app-supernova	Patch
@cloudoperators/juno-app-template	Patch
@cloudoperators/juno-messages-provider	Patch

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[github-actions]

PR Preview Action v1.6.3
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2026-02-13 08:24 UTC

[TilmanHaupt]

Thanks!