InjectionToken<CngxSelectShellSearchHost>
DI token a CngxSelectShell (or any pin-compatible host) provides on itself. CngxSelectSearch injects this to stay decoupled from the concrete shell class - same pattern as CNGX_OPTION_FILTER_HOST / CNGX_OPTION_STATUS_HOST.
CngxSelectShell
CngxSelectSearch
CNGX_OPTION_FILTER_HOST
CNGX_OPTION_STATUS_HOST