fix gradient color selection out of range for dynamic resize case

console/palette.go

@@ -67,6 +67,9 @@ func GetPalette(theme Theme) Palette {
 }
 
 func GetGradientColor(gradient []ui.Color, cur int, max int) ui.Color {
+	if cur > max {
+		cur = max
+	}
 	ratio := float64(len(gradient)) / float64(max)
 	return gradient[int(ratio*float64(cur))]
 }