Frontend/bugfix/tweak date formatting

[tristanlabelle]

Minor cosmetic tweak to not abbreviate dates that don't need to be.

Testing

Compared next and vercel preview:

Web frontend checklist

• There are no console warnings when running the app
• Added tests where relevant
• Clicked around my changes running locally and it works
• Checked Desktop, Mobile and Tablet screen sizes

For maintainers

• Maintainers can push commits to my branch
• Maintainers can merge this PR for me

[CouchersBot]

Mobile

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iOS	Android
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Deep links

iOS

couchers-devtool://expo-development-client/?url=https%3A%2F%2Ff26663a5--ota.preview.couchershq.org%2Fios%2Fmanifest

Android

couchers-devtool://expo-development-client/?url=https%3A%2F%2Ff26663a5--ota.preview.couchershq.org%2Fandroid%2Fmanifest

Web (Vercel)

View the Vercel web preview for this branch.

Backend

Schema	Schema diff	Sample emails

Other

Protos	Backend coverage	Web coverage

[darrenvong]

Looks reasonable to me!

[github-actions]

📝 Release Notes

This PR does not need to be included in release notes.

Reason: This is a minor cosmetic date formatting tweak that slightly changes how dates are displayed, but it is not a significant user-facing feature, major UX improvement, or important bug fix affecting core functionality.

🤖 Bot Debug Information

Model: couchers.openai.gpt-5.4
Decision: exclude
Reasoning: This is a minor cosmetic date formatting tweak that slightly changes how dates are displayed, but it is not a significant user-facing feature, major UX improvement, or important bug fix affecting core functionality.