Make nightlight temperature configurable via env variables

[Alejandro-M-Cruz]

Allow users to configure the color temperature for both enabled and disabled nightlight states.

Overview of changes:

• Introduce OMARCHY_NIGHTLIGHT_ON_TEMPERATURE and OMARCHY_NIGHTLIGHT_OFF_TEMPERATURE to manage nightlight and daylight temperatures.

• Add the new variables to config/uwsm/default (commented out by default).

• Add a migration to automatically update ~/.config/uwsm/default if the file exists.

[Copilot]

Pull request overview

Note

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Adds configurable nightlight color temperatures via environment variables and ensures existing user configs can be updated through a migration.

Changes:

• Add optional OMARCHY_NIGHTLIGHT_{ON,OFF}_TEMPERATURE exports to the default UWSM config template.
• Update omarchy-toggle-nightlight to read temperatures from environment with sensible defaults.
• Introduce a migration to append commented variable examples to existing ~/.config/uwsm/default.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
migrations/1779711585.sh	Appends commented nightlight temperature env vars to an existing user config or refreshes defaults otherwise
config/uwsm/default	Documents new optional env vars for nightlight temperatures
bin/omarchy-toggle-nightlight	Uses the new env vars (with defaults) to set on/off color temperatures

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 3 changed files in this pull request and generated 3 comments.