feat(StatusLetterIdenticon): use luminance to determine letter color

ui/StatusQ/src/StatusQ/Components/StatusLetterIdenticon.qml

@@ -29,7 +29,7 @@ Rectangle {
 
         font.weight: Font.Bold
         font.pixelSize: root.letterSize
-        color: Qt.rgba(255, 255, 255, 0.7)
+        color: d.luminance(root.color) > 0.5 ? Qt.rgba(0, 0, 0, 0.5) : Qt.rgba(255, 255, 255, 0.7)
 
         text: {
             if (emoji) {
@@ -45,5 +45,15 @@ Rectangle {
             return root.name.substring(shift, shift + charactersLen).toUpperCase()
         }
     }
+
+    QtObject {
+        id: d
+        function luminance(color) {
+            let r = Math.pow(color.r, 2.2) * 0.2126
+            let g = Math.pow(color.g, 2.2) * 0.7151
+            let b = Math.pow(color.b, 2.2) * 0.0721
+            return r + g + b
+        }
+    }
 }
 

ui/StatusQ/src/StatusQ/Components/StatusSmartIdenticon.qml

@@ -86,7 +86,6 @@ Loader {
             emoji: statusSmartIdenticon.icon.emoji
             emojiSize: statusSmartIdenticon.icon.emojiSize
             letterSize: statusSmartIdenticon.icon.letterSize
-            identiconText.color: statusSmartIdenticon.icon.textColor
             charactersLen: statusSmartIdenticon.icon.charactersLen
         }
     }

ui/StatusQ/src/StatusQ/Core/StatusIconSettings.qml

@@ -8,7 +8,6 @@ QtObject {
     property real width
     property real height
     property color color
-    property color textColor: Qt.rgba(255, 255, 255, 0.7)
     property color disabledColor
     property url source
     property int rotation