Fixed bug causing crash when switching between date selection ranges with no chart data saved.

Author: xan-m

InfiniLink/View Components/Sheets/ChartSettingsSheet/ChartSettingsSheetDatePicker.swift

@@ -14,14 +14,14 @@ struct ChartSettingsSheetDatePicker: View {
 	let oneMonthAgo = Calendar.current.date(byAdding: .month, value: -1, to: Date()) ?? (Date() - 2419200)
 
 	@Binding var chartRangeState: ChartManager.DateSelectionState
-	let oldestPoint: Date?
+	let oldestPoint: Date
 
 	var body: some View {
 		List {
 			DatePicker(
 				"Start Date",
 				selection: $chartRangeState.startDate,
-				in: (oldestPoint ?? oneMonthAgo)...today,
+				in: (oldestPoint)...today,
 				displayedComponents: [.date, .hourAndMinute]
 			)
 			DatePicker(

InfiniLink/View Components/Sheets/ChartSettingsSheet/ChartSettingsSheetMain.swift

@@ -81,7 +81,11 @@ struct ChartSettingsSheet: View {
 			case 1:
 				ChartSettingsSheetSliders(chartRangeState: self.$chartRangeState)
 			case 2:
-				ChartSettingsSheetDatePicker(chartRangeState: self.$chartRangeState, oldestPoint: chartPoints[0].timestamp)
+				if chartPoints.count > 0 {
+					ChartSettingsSheetDatePicker(chartRangeState: self.$chartRangeState, oldestPoint: chartPoints[0].timestamp!)
+				} else {
+					ChartSettingsSheetDatePicker(chartRangeState: self.$chartRangeState, oldestPoint: Calendar.current.date(byAdding: .month, value: -1, to: Date()) ?? (Date() - 2419200))
+				}
 			default:
 				EmptyView()
 			}