Add annotation label unit tests

[jpggvilaca]

Summary

• Add annotation label unit tests

How to test

Checklist

• The PR title and description are clear and descriptive
• I have manually tested the changes
• All changes are covered by automated tests
• All related issues are linked to this PR (if applicable)
• Documentation has been updated (if applicable)

[Copilot]

Pull Request Overview

This PR adds comprehensive unit tests for the AnnotationLabels component and includes a defensive code change to handle labels without names.

• Adds 8 test cases covering rendering, interactions, and edge cases
• Adds null-safety check for label names in width calculation

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
annotation-labels.component.tsx	Adds conditional check to prevent calculating width when label.name is undefined/null
annotation-labels.component.test.tsx	New test file with comprehensive coverage including empty labels, single/multiple labels, interactions, zoom scaling, and positioning

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[github-actions]

Docker Image Sizes

Image	Size
geti-tune-pr-4930	1.5G
geti-tune-sha-f126e5e	1.5G

[github-actions]

📊 Test coverage report

Metric	Coverage
Lines	40.0%
Functions	36.2%
Branches	84.7%
Statements	40.0%