fix(qt): preflight preferred GPU presentation

cx

crates/qbz-qt/Cargo.toml

@@ -50,14 +50,6 @@ qbz-app = { path = "../qbz-app" }
 qbz-audio = { path = "../qbz-audio" }
 # The HiFi Wizard's frontend-agnostic core; Qt owns the presentation adapter.
 qbz-dac-wizard-core = { path = "../qbz-dac-wizard-core" }
-# Vulkan enumeration for the Preferred-GPU row — real adapter NAMES, MODELS and
-# types, in the exact order `QT_VK_PHYSICAL_DEVICE_INDEX` counts them (both are
-# `vkEnumeratePhysicalDevices`). This is the Qt analogue of what the reference
-# does with `wgpu::Instance::enumerate_adapters`.
-#
-# `ash` is a thin FFI binding that dlopens libvulkan at RUNTIME: no Vulkan SDK
-# at build time, and a box without libvulkan simply enumerates nothing.
-ash = "0.38"
 qbz-qobuz = { path = "../qbz-qobuz" }
 # Cross-provider "Open Music Link" resolver. The crate is frontend-agnostic;
 # src/link_resolver_qt.rs supplies the live Qobuz search + Qt navigation seams.