[BUG] Changing timezone only stores offset rather than offset plus name

[ITestInProd]

The bug

When changing the timezone of a file Immich appears to only store the offset rather than the offset plus display name. When next editing the date/time Immich will display a different display name than previously selected.

I believe the web UI is selecting the first display name match based on the value of the exifInfo->timeZone field.

{ "exifInfo": { "make": null, "model": null, "exifImageWidth": 1487, "exifImageHeight": 1733, "fileSizeInByte": 992041, "orientation": "1", "dateTimeOriginal": "2023-01-11T13:09:00.000Z", "modifyDate": "2007-08-19T22:25:51.328Z", "timeZone": "UTC+2", "lensModel": null, "fNumber": null, "focalLength": null, "iso": null, "exposureTime": null, "latitude": 53.49256, "longitude": 17.601866, "city": "Sępólno Krajeńskie", "state": "Powiat sępoleński, Kujawsko-Pomorskie", "country": "Poland", "description": "", "projectionType": null } }

Immich.TZ.display.bug.mp4

The OS that Immich Server is running on

N/A

Version of Immich Server

1.91.4

Version of Immich Mobile App

N/A

Platform with the issue

• Server
• Web
• Mobile

Your docker-compose.yml content

N/A

Your .env content

N/A

Reproduction steps

1.Log in to https://demo.immich.app/photos
2.Select a photo and open the info pane.
3.Select edit next to the date.
4.Click on the hidden timezone field. This is not the Search bar (ref bug https://github.com/immich-app/immich/issues/5844).
5.Scroll to a new timezone such as `Europe/Helsinki (UTC+02:00)`.
6.Click Confirm.
7.Observe the timezone changes in the info pane.
8.Select edit next to the date.
9.Observe the displayed timezone is now `Africa/Blantyre (UTC+02:00)`.

Additional information

No response