Feature: Attribute-scoped manual control (freeze only what I changed)

[viprapp]

TL;DR
When manual control is detected, freeze only the attribute(s) I touched (brightness or color), and keep adapting the other.

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Problem

Currently, if I manually change a light while take_over_control is enabled, the light is marked “manually controlled” and all adaptation stops until reset/off-on — even if I only tweaked brightness (or only color).

This means:

• If I dim a light at night, the color temp stops adapting too.
• If I shift color manually, brightness adaptation also stops.
• To work around this, people toggle the global adapt_brightness / adapt_color switches or reset manual control via automation.

This breaks the “it just works” feeling and adds complexity.

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Proposed behavior

Let Adaptive Lighting detect which attribute changed and only freeze that one:

• If brightness changes → keep adapting color.
• If color changes → keep adapting brightness.
• If both change → behave as today (full manual).

Optional configuration (default keeps current behavior):

manual_control_policy: "all" | "changed_only" | "brightness_only" | "color_only"
# default: "all"

Example:

adaptive_lighting:
  - name: living_room
    lights: [light.living_room]
    take_over_control: true
    detect_non_ha_changes: true
    manual_control_policy: changed_only

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Why this helps

• Matches intuition: “I dimmed it; keep the circadian tone.”
• Avoids constant resets or extra automations.
• Backwards-compatible by default.
• Makes Adaptive Lighting feel smarter and more natural.

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What exists today (for context)

• When manual control is detected, AL disables all adaptation until reset/off-on.
• Separate switches (…_adapt_brightness / …_adapt_color) exist but are global, not per-light or per-change.
• Users have asked for “keep adapting color when I change brightness” behavior in discussions and issues, showing clear demand.

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✅ In short:
Give Adaptive Lighting the ability to respect what was changed manually instead of turning off everything.