refactor(tci): remove the test bench now that choosing the device is the setup

The TCI section of the audio settings was an investigation: open the
stream, read what arrives, record ten seconds to listen to, key a tone.
It answered every question it was built for — the frame layout, the
sample width, that the radio asks rather than follows a clock, that the
transmit audio source decides — and confirmed 80 W on real hardware.

None of that belongs in front of an operator now. The radio is simply one
of the devices in the two dropdowns, and choosing it IS the configuration:
one control, in the place where the question is already being asked.
Keeping the tick box beside it would have been two switches for one
decision, with the second one where nobody looks.

Gone with it: the stream/record/probe bindings, the audio.tci_rx setting,
and twenty-four translation keys. The plumbing they proved out stays and
now carries the voice keyer.

frontend/wailsjs/go/main/App.d.ts

@@ -575,10 +575,6 @@ export function GetStationSettings():Promise<main.StationSettings>;
 
 export function GetStationStatus():Promise<Array<main.StationDeviceStatus>>;
 
-export function GetTCIAudioStatus():Promise<cat.TCIAudioStatus>;
-
-export function GetTCIRecordAudio():Promise<boolean>;
-
 export function GetTelemetryEnabled():Promise<boolean>;
 
 export function GetTrackedAwards():Promise<Array<string>>;
@@ -841,8 +837,6 @@ export function PickSaveDatabase():Promise<string>;
 
 export function PopulateBuiltinReferences(arg1:string):Promise<number>;
 
-export function ProbeTCITransmit(arg1:number):Promise<void>;
-
 export function PublishLogNow():Promise<string>;
 
 export function QSLCopyTemplateToActiveProfile(arg1:number):Promise<number>;
@@ -911,8 +905,6 @@ export function RecomputeAllAwardRefs():Promise<number>;
 
 export function RecomputeAwardRefsForCode(arg1:string):Promise<number>;
 
-export function RecordTCIAudio(arg1:number):Promise<string>;
-
 export function RefreshCtyDat():Promise<main.CtyDatInfo>;
 
 export function RefreshKenwood():Promise<void>;
@@ -1165,8 +1157,6 @@ export function SetSpotMax(arg1:number):Promise<void>;
 
 export function SetSpotTTLMinutes(arg1:number):Promise<void>;
 
-export function SetTCIRecordAudio(arg1:boolean):Promise<void>;
-
 export function SetTelemetryEnabled(arg1:boolean):Promise<void>;
 
 export function SetUIPref(arg1:string,arg2:string):Promise<void>;
@@ -1219,14 +1209,10 @@ export function SetYaesuVOX(arg1:boolean):Promise<void>;
 
 export function StartCWDecoder():Promise<void>;
 
-export function StartTCIAudio(arg1:number,arg2:number):Promise<void>;
-
 export function StationSetRelay(arg1:string,arg2:number,arg3:boolean):Promise<void>;
 
 export function StopCWDecoder():Promise<void>;
 
-export function StopTCIAudio():Promise<void>;
-
 export function SwitchCATRig(arg1:number):Promise<void>;
 
 export function SyncFolderNow():Promise<number>;