Add clarification for auto-calculate white channel option (#249)

Enhanced "Auto white handling" documentation with clearer explanations regarding RGB channel treatment across different modes and color picker behavior.

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Co-authored-by: Frank <91616163+softhack007@users.noreply.github.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: 3 people

docs/features/cct.md

@@ -22,8 +22,9 @@ Brighter | This does the exact opposite and not touch the RGB channels at all, j
 None | No auto white calculation is performed. The white channel of colors can be manually set using the `White channel` slider in the user interface, RGB-only effects and most realtime sources will leave the white channel off.
 Dual | The `White channel` slider is present in the UI and works the same as in `None` mode, however if the slider value is 0 (far left), the `Brighter` mode is used for auto white calculation. This is the default auto white mode.
 Max | Sets white to the value of the brightest RGB channel. This is good for white-only LEDs without any RGB.
-
-`Accurate` and `Brighter` methods are applied on a per-pixel basis, so they also work in color palettes and realtime effects!
+  
+If you set the mode to anything other than 'None', the LEDs will be treated internally like having RGB channels (you'll see the colour picker in the UI).  
+`Accurate` and `Brighter` methods are applied on a per-pixel basis, so they also work in color palettes and realtime effects!  
 
 #### White Balance correction
 
@@ -64,4 +65,4 @@ If your hardware uses an IC that controls the color temperature based on one PWM
 
 #### CCT in the JSON API
 
-Please see [here](/interfaces/json-api/#cct-control) for more info on how to handle WLED CCT from integrations.
+See [CCT control in the JSON API](/interfaces/json-api/#cct-control) for integration details.