Using time zone from system instead of Home Assistant

[com6056]

What version of Adaptive Cover are you using?

2.0.5

What version of Home Assistant are you using?

2025.5.3

Checklist

• [x] I have filled out the issue template to the best of my ability.
• [x] This issue only contains 1 issue (if you have multiple issues, open one issue for each issue).
• [x] This issue is not a duplicate issue of currently previous issues..

Describe the issue

It seems like the time the integration uses is based on the time zone of the underlying system instead of the time zone configured within Home Assistant.

Reproduction steps

1. Leave system time zone as the default (don't set the TZ env var)
2. Debug logs show the integration using UTC

Diagnostics dump

No response