[Bug]: MX Master 3S Bluetooth-direct is online but DPI and SmartShift reads/writes fail on macOS 27

[gitcakes]

Pre-flight

• I searched existing issues and this is not a duplicate.
• I am on the latest release.
• Logi Options+ is fully uninstalled and no Logitech control processes are running.

Environment

• OpenLogi: 0.7.4 (GUI and agent, IPC protocol 23)
• OS: macOS 27.0, build 26A5416b, Apple Silicon (arm64)
• Device: Logitech MX Master 3S
• VID / PID: 046d / b034
• Firmware: RBM22.01_0006
• Connection: Bluetooth direct, no receiver
• Permissions: Accessibility, Input Monitoring, and Bluetooth all shown as Granted in OpenLogi

What happened

The MX Master 3S is paired directly through macOS Bluetooth and OpenLogi discovers it as online, including battery status. However, live HID++ controls fail:

• The Pointer page shows "Couldn't read DPI — click to retry."
• It also shows "Couldn't read SmartShift — click to retry."
• Retrying does not recover either read.
• Changing SmartShift mode/settings in the UI has no effect on the mouse.
• The mouse continues working normally as a pointer.

Expected: OpenLogi should read the current DPI and SmartShift state, and SmartShift changes should be applied to the mouse.

The problem persists after a full Mac restart, power-cycling the mouse, and restarting the OpenLogi agent. This appears related to #316 and the Bluetooth HID++ control-path failure described in #468, but this report covers MX Master 3S + Bluetooth-direct + OpenLogi 0.7.4 + macOS 27, with the device online while both DPI and SmartShift transactions fail.

Steps to reproduce

1. Pair an MX Master 3S directly in macOS System Settings → Bluetooth.
2. Grant OpenLogi Agent Accessibility and Input Monitoring permissions.
3. Ensure Logi Options+ is not installed or running.
4. Launch OpenLogi 0.7.4.
5. Open the MX Master 3S device card, then the Pointer tab.
6. Observe "Couldn't read DPI — click to retry."
7. Observe "Couldn't read SmartShift — click to retry."
8. Click either retry control or change the SmartShift mode.
9. Reads continue to fail and the mouse wheel mode does not change.

OpenLogi diagnostics

### OpenLogi Diagnostics

App
- OpenLogi (GUI): v0.7.4 (release)
- Agent: v0.7.4 (connected)
- IPC protocol: GUI 23 / agent 23
- Inventory: ready
- OS: macOS 27.0 (arm64)
- Locale: en-GB (UI: follow system)
- Accessibility: granted · Input hook: installed
- Config: schema 4 · 1 configured device(s) · thumbwheel 14

Devices (1)
- MX Master 3S — mouse (codename: MX Master 3S)
  - Connection: Bluetooth (direct) · Online: yes · Battery: 85% (discharging, full)
  - Capabilities: buttons=yes, pointer=yes, lighting=no
  - DPI: read failed
  - Model: 0b034 (model-ids: b034/0000/0000, ext-model: 00)
  - 

[linear-code]

OLG-291

[hafuta]

👍 Having similar issue on Windows PC.
Connected via Bluetooth, when changing SmartShift settings it shows "Couldn't read SmartShift - click to retry".

### OpenLogi Diagnostics

**App**
- OpenLogi (GUI): v0.8.0 (release)
- Agent: v0.8.0 (connected)
- IPC protocol: GUI 28 / agent 28
- Inventory: ready
- OS: Windows (x86_64)
- Locale: en-US (UI: follow system)
- Accessibility: granted · Input hook: installed
- Launch at login: yes · Menu bar: yes · Update check: on
- Running from: source build (dev)
- Config: schema 6 · 2 configured device(s) · thumbwheel 14

**Assets**
- Source: user cache · Index: loaded (210 models) · User cache: present
- Cache path: C:\Users\Matan\.local/share/openlogi\assets · Bundle assets: absent

**Devices (2)**
- MX Master 3S — mouse (codename: MX Master 3S)
  - Connection: Bluetooth (direct) · Online: yes · Battery: 65% (discharging, full)
  - Capabilities: buttons=yes, pointer=yes, lighting=no
  - DPI: 1350 dpi (range 200–8000, 157 steps)
  - Model: 0b034 (model-ids: b034/0000/0000, ext-model: 00)
  - Transports: BTLE
  - Render: mx_master_3s · direct
- MX Keys — keyboard (codename: MX Keys Wireless Keyboard)
  - Connection: Bluetooth (direct) · Online: yes · Battery: 100% (discharging, full)
  - Capabilities: buttons=yes, pointer=no, lighting=no
  - Model: 0b35b (model-ids: b35b/408a/0000, ext-model: 00)
  - Transports: eQuad, BTLE
  - Render: mx_keys · direct