Automatically save posix timezone from your local phone timezone if it is empty, take the logic out of the view so users don't havve to manually save anymore

Meshtastic/Persistence/UpdateCoreData.swift

@@ -574,7 +574,11 @@ func upsertDeviceConfigPacket(config: Config.DeviceConfig, nodeNum: Int64, sessi
 				newDeviceConfig.tripleClickAsAdHocPing = !config.disableTripleClick
 				newDeviceConfig.ledHeartbeatEnabled = !config.ledHeartbeatDisabled
 				newDeviceConfig.isManaged = config.isManaged
-				newDeviceConfig.tzdef = config.tzdef
+				if config.tzdef.isEmpty {
+					newDeviceConfig.tzdef = TimeZone.current.posixDescription
+				} else {
+					newDeviceConfig.tzdef = config.tzdef
+				}
 				fetchedNode[0].deviceConfig = newDeviceConfig
 			} else {
 				fetchedNode[0].deviceConfig?.role = Int32(config.role.rawValue)
@@ -586,7 +590,11 @@ func upsertDeviceConfigPacket(config: Config.DeviceConfig, nodeNum: Int64, sessi
 				fetchedNode[0].deviceConfig?.tripleClickAsAdHocPing = !config.disableTripleClick
 				fetchedNode[0].deviceConfig?.ledHeartbeatEnabled = !config.ledHeartbeatDisabled
 				fetchedNode[0].deviceConfig?.isManaged = config.isManaged
-				fetchedNode[0].deviceConfig?.tzdef = config.tzdef
+				if config.tzdef.isEmpty {
+					fetchedNode[0].deviceConfig?.tzdef = TimeZone.current.posixDescription
+				} else {
+					fetchedNode[0].deviceConfig?.tzdef = config.tzdef
+				}
 			}
 			if sessionPasskey != nil {
 				fetchedNode[0].sessionPasskey = sessionPasskey

Meshtastic/Views/Settings/Config/DeviceConfig.swift

@@ -334,11 +334,5 @@ struct DeviceConfig: View {
 		self.tripleClickAsAdHocPing = node?.deviceConfig?.tripleClickAsAdHocPing ?? false
 		self.ledHeartbeatEnabled = node?.deviceConfig?.ledHeartbeatEnabled ?? true
 		self.tzdef = node?.deviceConfig?.tzdef ?? ""
-		if self.tzdef.isEmpty {
-			self.tzdef = TimeZone.current.posixDescription
-			self.hasChanges = true
-		} else {
-			self.hasChanges = false
-		}
 	}
 }