feat: multiple amplifiers + SmartSDR v4 DSP filters

Multi-amp: Settings->Amplifier becomes a list (amps.json, legacy single-amp keys auto-migrate to entry #1); one client per enabled amp with per-id bindings (GetAmplifiers/SaveAmplifiers/GetAmpStatuses/AmpOperate/AmpPower/AmpPowerLevel/AmpFanMode); legacy a.pgxl/a.spe/a.acom point at the first enabled amp of each family. Amp cards in FlexPanel and Station Control gain a dropdown to pick the amp; the status bar shows one clickable chip per amp. Use case: two SPEs run in parallel.

Flex v4 DSP (8000/Aurora): NRL/ANFL (lms_nr/lms_anf), NRS (speex_nr), NRF (nrf) with level sliders, RNN (rnnoise) and ANFT on/off — keys per the FlexLib slice docs; the section only shows when the radio reports these keys (dsp_v4 flag), so 6000-series panels are unchanged.

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

@@ -36,6 +36,14 @@ export function ActivateProfile(arg1:number):Promise<void>;
 
 export function AddQSO(arg1:qso.QSO):Promise<number>;
 
+export function AmpFanMode(arg1:string,arg2:string):Promise<void>;
+
+export function AmpOperate(arg1:string,arg2:boolean):Promise<void>;
+
+export function AmpPower(arg1:string,arg2:boolean):Promise<void>;
+
+export function AmpPowerLevel(arg1:string,arg2:string):Promise<void>;
+
 export function AntGeniusActivate(arg1:number,arg2:number):Promise<void>;
 
 export function AntGeniusDeselect(arg1:number):Promise<void>;
@@ -210,6 +218,8 @@ export function FlexSetANF(arg1:boolean):Promise<void>;
 
 export function FlexSetANFLevel(arg1:number):Promise<void>;
 
+export function FlexSetANFT(arg1:boolean):Promise<void>;
+
 export function FlexSetAPF(arg1:boolean):Promise<void>;
 
 export function FlexSetAPFLevel(arg1:number):Promise<void>;
@@ -234,6 +244,14 @@ export function FlexSetFilter(arg1:number,arg2:number):Promise<void>;
 
 export function FlexSetKeySpeed(arg1:number):Promise<void>;
 
+export function FlexSetLMSANF(arg1:boolean):Promise<void>;
+
+export function FlexSetLMSANFLevel(arg1:number):Promise<void>;
+
+export function FlexSetLMSNR(arg1:boolean):Promise<void>;
+
+export function FlexSetLMSNRLevel(arg1:number):Promise<void>;
+
 export function FlexSetMic(arg1:number):Promise<void>;
 
 export function FlexSetMicProfile(arg1:string):Promise<void>;
@@ -250,6 +268,10 @@ export function FlexSetNBLevel(arg1:number):Promise<void>;
 
 export function FlexSetNR(arg1:boolean):Promise<void>;
 
+export function FlexSetNRF(arg1:boolean):Promise<void>;
+
+export function FlexSetNRFLevel(arg1:number):Promise<void>;
+
 export function FlexSetNRLevel(arg1:number):Promise<void>;
 
 export function FlexSetPower(arg1:number):Promise<void>;
@@ -262,10 +284,16 @@ export function FlexSetRIT(arg1:boolean):Promise<void>;
 
 export function FlexSetRITFreq(arg1:number):Promise<void>;
 
+export function FlexSetRNN(arg1:boolean):Promise<void>;
+
 export function FlexSetRXAntenna(arg1:string):Promise<void>;
 
 export function FlexSetSidetoneLevel(arg1:number):Promise<void>;
 
+export function FlexSetSpeexNR(arg1:boolean):Promise<void>;
+
+export function FlexSetSpeexNRLevel(arg1:number):Promise<void>;
+
 export function FlexSetSplit(arg1:boolean):Promise<void>;
 
 export function FlexSetTXAntenna(arg1:string):Promise<void>;
@@ -302,6 +330,10 @@ export function GetActiveProfile():Promise<profile.Profile>;
 
 export function GetAlertEmailTo():Promise<string>;
 
+export function GetAmpStatuses():Promise<Array<main.AmpStatus>>;
+
+export function GetAmplifiers():Promise<Array<main.AmpConfig>>;
+
 export function GetAntGeniusSettings():Promise<main.AntGeniusSettings>;
 
 export function GetAntGeniusStatus():Promise<antgenius.Status>;
@@ -738,6 +770,8 @@ export function SaveADIFMonitor(arg1:main.ADIFMonitorConfig):Promise<void>;
 
 export function SaveAlertRule(arg1:alerts.Rule):Promise<alerts.Rule>;
 
+export function SaveAmplifiers(arg1:Array<main.AmpConfig>):Promise<void>;
+
 export function SaveAntGeniusSettings(arg1:main.AntGeniusSettings):Promise<void>;
 
 export function SaveAudioSettings(arg1:main.AudioSettings):Promise<void>;