Adds last sync date in the debug view

PadelClub/Views/Navigation/Toolbox/DebugSettingsView.swift

@@ -16,6 +16,7 @@ struct DebugSettingsView: View {
                 LabeledContent("Has Websocket Manager", value: self._hasWebSocketManager)
                 LabeledContent("Websocket ping", value: self._wsPingStatus)
                 LabeledContent("Websocket failure", value: self._wsFailure)
+                LabeledContent("Last sync date", value: self._lastSyncDate)
             }
             
             Section("Settings") {
@@ -66,6 +67,9 @@ struct DebugSettingsView: View {
     fileprivate var _hasWebSocketManager: String {
         return "\(StoreCenter.main.hasWebSocketManager)"
     }
+    fileprivate var _lastSyncDate: String {
+        return "\(StoreCenter.main.lastSyncDate)"
+    }
 }
 
 //#Preview {