fix(ui5-multi-combobox): fix RTL arrow navigation to and from the tokens

[ndeshev]

fixes: #11826

[Copilot]

Pull Request Overview

This PR updates the arrow key navigation in MultiComboBox to correctly handle focusing and returning from tokens in both LTR and RTL modes, and adds Cypress tests to verify the behavior.

• Factor out cursor/selection checks into a _shouldFocusLastToken getter.
• Implement separate _handleArrowLeft and _handleArrowRight methods conditioned on direction.
• Expand tokenizer keydown logic to respect both left/right arrows in RTL/LTR.
• Add comprehensive Cypress specs covering RTL/LTR arrow navigation scenarios.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
packages/main/src/MultiComboBox.ts	Added isLeft import, introduced _shouldFocusLastToken getter, refactored arrow handlers, and updated tokenizer keydown logic for RTL/LTR.
packages/main/cypress/specs/MultiComboBox.cy.tsx	Added new test suite “MultiComboBox RTL/LTR Arrow Navigation” with scenarios verifying focus transitions in both directions.

Comments suppressed due to low confidence (1)

packages/main/src/MultiComboBox.ts:737

• The comment mentions ‘beginning/end’ but the implementation only tests the logical beginning. Either update the comment to reflect the actual logic or adjust the code to cover the RTL end-of-input case.

	// If the input is focused and the cursor is at the beginning/end of the input,

[ui5-webcomponents-bot]

🎉 This PR is included in version v2.13.0-rc.0 🎉

The release is available on v2.13.0-rc.0

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