feat: DAX selector on the Flex panel — routes the active slice's RX audio to a DAX channel (slice dax=0-8, Off..8 dropdown next to the antenna selection, highlighted when active); changelog updated

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

@@ -240,6 +240,8 @@ export function FlexSetCWSidetone(arg1:boolean):Promise<void>;
 
 export function FlexSetCWSpeed(arg1:number):Promise<void>;
 
+export function FlexSetDAX(arg1:number):Promise<void>;
+
 export function FlexSetFilter(arg1:number,arg2:number):Promise<void>;
 
 export function FlexSetKeySpeed(arg1:number):Promise<void>;