fix: handle empty teams array to prevent TypeError

[MikeSmvl]

Description

Ensure the backend handles empty teams arrays gracefully to prevent the PagerDutyPage component from staying in a loading state indefinitely. Updated the code to use optional chaining and nullish coalescing when accessing the team name.

Issue number: #65

Type of change

• [ ] New feature (non-breaking change which adds functionality)
• [x] Fix (non-breaking change which fixes an issue)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• [x] I have performed a self-review of this change
• [x] Changes have been tested
• [ ] Changes are documented
• [x] Changes generate no new warnings
• [x] PR title follows conventional commit semantics

If this is a breaking change 👇

• [ ] I have documented the migration process
• [ ] I have implemented necessary warnings (if it can live side by side)

Acknowledgement

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