Ports the Tauri qconnect/transport.rs config layer to Slint: resolve_transport_config
(env overrides -> qws/createToken auto-discovery -> WsTransportConfig with require_jwt
+ 60s idle-retry + default channels) and fetch_qconnect_transport_credentials (POST
/qws/createToken with X-App-Id / X-User-Auth-Token), plus the device-identity helpers
(uuid via shared qbz_app::qconnect_identity, hostname, friendly name, persisted
device-name in qconnect_settings.db) and the hex-channel parsers.
Frontend difference handled: the Qobuz client is reached via runtime.core().client()
(Arc<RwLock<Option<QobuzClient>>>, may be None before API init) and is gated/ok_or'd,
unlike Tauri's always-present AppState.client. Uses qbz_qobuz::endpoints::build_url
(same base) instead of the Tauri-local one.
Deps added: qbz-qobuz (build_url), qconnect-transport-ws (WsTransportConfig /
NativeWsTransport). allow(dead_code) until the service wires it. cargo check
-p qbz-slint green (only the pre-existing unrelated rename_folder warning).
cc
vicrodh
8e61568dc0