v2.3.1-cdit.1 — new-group defaults fix

Bugfix + polish release for the CDiT fork of basnijholt/adaptive-lighting.

Fixes

• New-group defaults (bug): a profile created with only a name seeded its runtime range sliders from native_min, so a brand-new group ran at max_brightness=1% and a collapsed 1000–1000K color-temp range until the options dialog was saved once. Range entities now fall back to sensible DEFAULT_* (5 / 100 / 2200 / 5500). Adds a regression test.
• Section collapse defaults: the options dialog now opens with Targets + Daytime curve expanded and the rest (Sun schedule, Ambient lux, Light control, Advanced, Diagnostics) collapsed — 2 open / 5 closed.

Notes

• Existing profiles are unaffected — their options are already saved; only newly-created groups get the corrected seed.

Attribution: core curve math, light interception, and HACS plumbing are upstream's work by @basnijholt and contributors.