fix: color wheel alpha assignment

src/application/applicationstate.c

@@ -143,7 +143,7 @@ void vektor_appstate_new(VektorWidgetState* wstate, VektorAppState* stateOut) {
     *stateOut->shapeBuffer = (VektorShapeBuffer){0};
     stateOut->canvas = malloc(sizeof(VektorCanvas));
     stateOut->widgetState = wstate;
-    stateOut->currentColor = vektor_color_blank;
+    stateOut->currentColor = vektor_color_solid(0, 0, 0);
     stateOut->selectedShape = NULL;
     vektor_canvas_init(wstate, stateOut->canvas, stateOut->shapeBuffer);
 

src/ui/widgets/colorwheel.c

@@ -362,7 +362,8 @@ VektorColor vektor_color_wheel_get_color(VektorColorWheel* wheel) {
     return (VektorColor) {
         .r = (unsigned char)(r*255), 
         .g = (unsigned char)(g*255), 
-        .b = (unsigned char)(b*255) 
+        .b = (unsigned char)(b*255) ,
+        .a = 255
     };
 }