[Device]: MX Master 3S / CustomShortcut + Per-App settings missing in the app

### Pre-flight checklist

- [x] I quit **Logi Options+** before testing.
- [x] I searched existing issues for my device.

### Device model

MX Master 3S

### Connection

Bluetooth (direct, no receiver)

### What's the problem?

Device is detected but a feature doesn't work

### `openlogi list` output

```text
?
```

### `openlogi diag features` output

```text

```

### Details

_No response_

Start by reproducing the report with an MX Master 3S over Bluetooth, then run the mentioned `openlogi list` and `openlogi diag features` commands with meaningful output. Trace how device features and app settings are detected; done means CustomShortcut and per-app settings are available and verified for this device.

Written by the indexing model from the issue text.