fix: use .withoutResponse for SaveConfig to prevent silent write drop

The beacon reboots instantly on SaveConfig (0x60). Using .withResponse
meant CoreBluetooth expected a GATT ACK that never arrived, potentially
causing the write to be silently dropped — leaving the config unsaved
and the beacon LED still flashing after provisioning.

Switching to .withoutResponse fires the bytes directly into the BLE
radio buffer without requiring a round-trip ACK. The beacon firmware
processes the save command from its buffer before rebooting.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

PayfritBeacon/Provisioners/DXSmartProvisioner.swift

@@ -174,9 +174,12 @@ final class DXSmartProvisioner: NSObject, BeaconProvisioner {
             await diagnosticLog?.log("write", "[\(index + 1)/\(commands.count)] \(name) (\(packet.count) bytes)")
 
             // SaveConfig (last command) causes beacon MCU to reboot — it never sends an ACK.
-            // Fire the BLE write and return immediately; the disconnect is expected.
+            // Use .withoutResponse so CoreBluetooth fires the bytes immediately into the
+            // BLE radio buffer without waiting for a GATT round-trip. With .withResponse,
+            // the beacon reboots before the ACK arrives, and CoreBluetooth may silently
+            // drop the write — leaving the config unsaved and the beacon still flashing.
             if name == "SaveConfig" {
-                peripheral.writeValue(packet, for: writeChar, type: .withResponse)
+                peripheral.writeValue(packet, for: writeChar, type: .withoutResponse)
                 await diagnosticLog?.log("write", "✅ [\(index + 1)/\(commands.count)] SaveConfig sent — beacon will reboot")
                 await diagnosticLog?.log("write", "✅ All commands written successfully")
                 return

PayfritBeacon/Services/APIClient.swift

@@ -220,7 +220,7 @@ actor APIClient {
         uuid: String,
         major: Int,
         minor: Int,
-        macAddress: String?,
+        hardwareId: String,
         beaconType: String,
         token: String
     ) async throws {
@@ -230,9 +230,9 @@ actor APIClient {
             "UUID": uuid,
             "Major": major,
             "Minor": minor,
+            "HardwareId": hardwareId,
             "BeaconType": beaconType
         ]
-        if let mac = macAddress { body["MacAddress"] = mac }
         let data = try await post(path: "/beacon-sharding/register_beacon_hardware.php", body: body, token: token, businessId: businessId)
         let resp = try JSONDecoder().decode(OKResponse.self, from: data)
         guard resp.OK else {
@@ -241,12 +241,13 @@ actor APIClient {
     }
 
     func verifyBeaconBroadcast(
+        hardwareId: String,
         uuid: String,
         major: Int,
         minor: Int,
         token: String
     ) async throws {
-        let body: [String: Any] = ["UUID": uuid, "Major": major, "Minor": minor]
+        let body: [String: Any] = ["HardwareId": hardwareId, "UUID": uuid, "Major": major, "Minor": minor]
         let data = try await post(path: "/beacon-sharding/verify_beacon_broadcast.php", body: body, token: token)
         let resp = try JSONDecoder().decode(OKResponse.self, from: data)
         guard resp.OK else {

PayfritBeacon/Views/ScanView.swift

@@ -706,7 +706,7 @@ struct ScanView: View {
                 uuid: ns.uuid,
                 major: ns.major,
                 minor: Int(config.minor),
-                macAddress: nil,
+                hardwareId: selectedBeacon?.id.uuidString ?? "unknown-ios",
                 beaconType: BeaconType.dxsmart.rawValue,
                 token: token
             )
@@ -739,7 +739,7 @@ struct ScanView: View {
                 uuid: ns.uuid,
                 major: ns.major,
                 minor: Int(config.minor),
-                macAddress: nil,
+                hardwareId: selectedBeacon?.id.uuidString ?? "unknown-ios",
                 beaconType: selectedBeacon?.type.rawValue ?? "Unknown",
                 token: token
             )