Serial Studio — new I/O driver

Before writing anything, read core/Devices/IO/Drivers/BluetoothLE.h and BluetoothLE.cpp in full. They are the canonical reference for the driver contract — match their structure, signal/slot wiring, and driverProperties() shape rather than inventing a new layout. After the read, restate the driver contract in chat in 2-3 sentences (pure virtuals, publish path, timestamp-at-boundary) before scaffolding — a contract you've just named is one the new code follows, not one it drifts from (doc/claude/j-space.md).

A driver subclasses IO::HAL_Driver (core/Core/IO/HAL_Driver.h) and must implement the pure virtuals: close, isOpen, isReadable, isWritable, configurationOk, write, open, driverProperties, and setDriverProperty. Also consider the non-pure virtuals with default bodies — deviceIdentifier(), selectByIdentifier(), applyConnectionSettings() — which drive device selection and reconnection. Received bytes are published via publishReceivedData(...) — stamp the timestamp at the driver boundary (source owns time; see [ss-hotpath]). Never re-stamp downstream.

Touch-points to wire (verify each against an existing driver)

1. core/Devices/IO/Drivers/<Name>.h / .cpp — the driver class, SPDX header, .h ordering rules.
2. core/Core/SerialStudio.h — add the value to the BusType enum (QML uses SerialStudio.BusType.*, never integer literals).
3. core/Devices/IO/ConnectionManager.{h,cpp} — accessor (e.g. network() / uart() analogue) plus signal forwarding; the bus lookups live in ConnectionManager/DriverUiRegistry.cpp (forBusType()) and the live-instance switch in ConnectionManager/DriverFactory.cpp (DriverFactory::create(), spec 0070). Update both.
4. core/Devices/CMakeLists.txt — add IO/Drivers/<Name>.cpp to the source list (sources are listed explicitly, not globbed; commercial drivers go in the guarded if(BUILD_COMMERCIAL) block).
5. QML configuration UI — the driver panes are bespoke forms (only the Project Editor renders driverProperties() generically; a row one mode does not use stays in the list and carries a visibleWhen rule, never a conditional append, because the list is also what a project persists): create app/qml/MainWindow/Panes/SetupPanes/Drivers/<Name>.qml, add its Loader to the StackLayout in SetupPanes/Hardware.qml at the bus's enum position (the layout indexes by Cpp_IO_Manager.busType), and register the new .qml in the QML_SOURCES list in app/CMakeLists.txt.
6. core/Core/EnumLabels.cpp — add the bus to the busTypeSlug() and busTypeLabel() switches (the API's string names for the bus; commercial buses go inside the #ifdef BUILD_COMMERCIAL block).
7. core/Ui/ProjectEditor/ProjectEditorIcons.h — add the bus to the busTypeIcon() switch, and core/Ui/ProjectEditor/EditorForms.cpp — add it to the busTypes combobox list in the source form model.
8. Icon — add the driver SVG under app/rcc/icons/devices/<tier>/ (16/24/32) and register it with a <file> entry in app/rcc/rcc.qrc (busTypeIcon() returns its qrc:/ path).
9. CLI (optional) — if it should be launchable headless, add options in app/src/Misc/CLI.{h,cpp} following the existing setupUartConnection / setupTcpConnection pattern.
10. tests/utils/api_client.py (optional) — add the bus to bus_map if integration tests should reach it via io.setBusType (known drift: mqtt is missing from it today).

The list above drifts as the app grows. Before declaring done, grep a recently added bus value (e.g. grep -rn "BusType::HidDevice" app/src core) and mirror every switch/list it appears in.

Rules

• This is a multi-file change (>3 files): state the plan and get confirmation before executing.
• Follow doc/claude/code-style.md (header ordering, [[nodiscard]], no in-header member init, Q_EMIT not emit, Christmas-tree ordering).
• Run python scripts/code-verify.py --check on the new files before handoff.
• Do not build or run the app — leave compilation and runtime testing to the developer.