few changes:

- sending a successful pair request through context menu while a pending one exists in client clears it
- adjustments to higlight coloring, preventing any text colors to blend with the highlight
- some text adjustments
- editing uid color in profile editor also previews the highlight

LightlessSync/UI/Style/Luminance.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Numerics;
+
+namespace LightlessSync.UI.Style
+{
+    internal static class Luminance
+    {
+        public static float BrightnessThreshold { get; set; } = 0.4f;
+        public static float HighlightBoostMax { get; set; } = 0.1f;
+        public static float SmoothFactor { get; set; } = 0.15f;
+
+        private static float Brightness(Vector4 color)
+            => Math.Max(color.X, Math.Max(color.Y, color.Z));
+
+        public static float ComputeHighlight(Vector4? textColor, Vector4? glowColor)
+        {
+            float brightnessText = textColor.HasValue ? Brightness(textColor.Value) : 1f;
+            float brightnessGlow = glowColor.HasValue ? Brightness(glowColor.Value) : 1f;
+
+            if (brightnessText >= BrightnessThreshold || brightnessGlow >= BrightnessThreshold)
+                return 0f;
+
+            float deficit = Math.Min(BrightnessThreshold - brightnessText,
+                                     BrightnessThreshold - brightnessGlow);
+
+            float factor = Math.Clamp(deficit / BrightnessThreshold, 0f, 1f);
+            factor = MathF.Pow(factor, 2.0f);
+
+            return factor * HighlightBoostMax;
+        }
+
+        public static Vector4 BackgroundContrast(Vector4? textColor, Vector4? glowColor, Vector4 backgroundColor, ref Vector4 currentBg)
+        {
+            if (!textColor.HasValue && !glowColor.HasValue)
+                return backgroundColor;
+
+            float brightnessText = textColor.HasValue ? Brightness(textColor.Value) : 0f;
+            float brightnessGlow = glowColor.HasValue ? Brightness(glowColor.Value) : 0f;
+
+            float fgBrightness = Math.Max(brightnessText, brightnessGlow);
+            float bgBrightness = Brightness(backgroundColor);
+            float diff = Math.Abs(bgBrightness - fgBrightness);
+
+            bool shouldBeDark = fgBrightness > 0.5f;
+            Vector4 targetBg;
+
+            if (diff >= BrightnessThreshold)
+            {
+                targetBg = backgroundColor;
+            }
+            else
+            {
+                targetBg = shouldBeDark
+                    ? new Vector4(0.05f, 0.05f, 0.05f, backgroundColor.W)
+                    : new Vector4(0.95f, 0.95f, 0.95f, backgroundColor.W);
+            }
+
+            float t = Math.Clamp(SmoothFactor, 0f, 1f);
+            currentBg = t <= 0f ? targetBg : Vector4.Lerp(currentBg, targetBg, t);
+
+            return currentBg;
+        }
+    }
+}