fix issue #28 -> 1hr lines for main chart

FreeAPS/Sources/Modules/Home/View/Chart/MainChartView.swift

@@ -1040,7 +1040,7 @@ extension MainChartView {
     }
 
     private var mainChartXAxis: some AxisContent {
-        AxisMarks(values: .stride(by: .hour, count: screenHours == 24 ? 4 : 2)) { _ in
+        AxisMarks(values: .stride(by: .hour, count: screenHours > 6 ? (screenHours > 12 ? 4 : 2) : 1)) { _ in
             if displayXgridLines {
                 AxisGridLine(stroke: .init(lineWidth: 0.5, dash: [2, 3]))
             } else {
@@ -1050,7 +1050,7 @@ extension MainChartView {
     }
 
     private var basalChartXAxis: some AxisContent {
-        AxisMarks(values: .stride(by: .hour, count: screenHours == 24 ? 4 : 2)) { _ in
+        AxisMarks(values: .stride(by: .hour, count: screenHours > 6 ? (screenHours > 12 ? 4 : 2) : 1)) { _ in
             if displayXgridLines {
                 AxisGridLine(stroke: .init(lineWidth: 0.5, dash: [2, 3]))
             } else {