ControlCenter: add proper shader for distro logo

Modules/Bar/Widgets/ControlCenter.qml

@@ -80,7 +80,7 @@ NIconButton {
     layer.enabled: useDistroLogo && colorizeDistroLogo
     layer.effect: ShaderEffect {
       property color targetColor: Settings.data.colorSchemes.darkMode ? Color.mOnSurface : Color.mSurfaceVariant
-      property real colorizeMode: 1.0
+      property real colorizeMode: 2.0
 
       fragmentShader: Qt.resolvedUrl(Quickshell.shellDir + "/Shaders/qsb/appicon_colorize.frag.qsb")
     }

Shaders/frag/appicon_colorize.frag

@@ -6,7 +6,7 @@ layout(std140, binding = 0) uniform buf {
     mat4 qt_Matrix;
     float qt_Opacity;
     vec4 targetColor;
-    float colorizeMode; // 0.0 = dock mode (grayscale), 1.0 = tray mode (intensity)
+    float colorizeMode; // 0.0 = dock mode (grayscale), 1.0 = tray mode (intensity), 2.0 = distro mode (luminance with better contrast)
 } ubuf;
 
 void main() {
@@ -17,13 +17,24 @@ void main() {
     if (ubuf.colorizeMode < 0.5) {
         // Dock mode: Convert to grayscale using proper luminance weights
         intensity = dot(tex.rgb, vec3(0.299, 0.587, 0.114));
-    } else {
+    } else if (ubuf.colorizeMode < 1.5) {
         // Tray mode: Use the maximum RGB channel value as intensity
         intensity = max(max(tex.r, tex.g), tex.b);
         
         // Normalize intensity to make all icons more uniform
         intensity = smoothstep(0.1, 0.9, intensity);
-    }
+    } else {
+    // Distro mode: Brightness boost with proper alpha handling
+    float maxChannel = max(max(tex.r, tex.g), tex.b);
+    
+    intensity = maxChannel * 1.5;
+    intensity = min(intensity, 1.0);
+    intensity = intensity * 0.7 + 0.3;
+    
+    intensity = intensity * tex.a;
+    
+    fragColor = vec4(ubuf.targetColor.rgb * intensity, tex.a) * ubuf.qt_Opacity;
+}
     
     fragColor = vec4(ubuf.targetColor.rgb * intensity, tex.a) * ubuf.qt_Opacity;
 }