feat(ui): first version of a NotificationManager

[vlad-schur-external-sap]

Summary

Create a first version of a NotificationManager component using Sonner.

NotificationManager is a simple wrapper around the Sonner library to add Juno-specific functionality and semantics on top of its features while Sonner handles all the heavy lifting

Changes Made

• Added NotificationManager component as a Sonner Toaster wrapper with Juno-specific defaults (dismissible, duration, visibleToasts, position):
  • Notifications can be scoped to a specific manager instance via toasterId
  • Wrapped Sonner's toast with Juno semantic variants (info, success, warning, error, danger) - all calls render Toast component
• Styling:
  • className in toast options applies only to Sonner's <li> wrapper, not the inner Juno Toast element
  • Applied juno-toast class to Sonner's toast wrapper via toastOptions.classNames for consistent CSS targeting

Related Issues

• Issue 1467: [Task](ui): create a first version of NotificationManager #1467

Screenshots (if applicable)

Testing Instructions

1. pnpm i
2. pnpm TASK

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.

PR Manifesto

Review the PR Manifesto for best practises.

Additional notes:

• ShadowRoot support is not working out of the box. This is an upstream Sonner limitation (sonner#361); documented in stories
• Sonner handles all toast lifecycle (timers, queuing, dismissal, history). Toast is intentionally kept logic-less in this context (Toast internal is not yet removed to avoid breaking its usage)

[changeset-bot]

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Latest commit: 55a9422

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