♻️(frontend) refactor audio tab to controlled device selection pattern

Convert audio tab device selections to controlled behavior matching
video tab implementation for consistency.

Maintains current component structure without migrating to SelectDevice
component yet, focusing on controlled state pattern alignment first.

src/frontend/src/features/settings/components/tabs/AudioTab.tsx

@@ -25,7 +25,7 @@ export const AudioTab = ({ id }: AudioTabProps) => {
   const { localParticipant } = useRoomContext()
 
   const {
-    userChoices: { noiseReductionEnabled },
+    userChoices: { noiseReductionEnabled, audioDeviceId, audioOutputDeviceId },
     saveAudioInputDeviceId,
     saveNoiseReductionEnabled,
     saveAudioOutputDeviceId,
@@ -33,17 +33,11 @@ export const AudioTab = ({ id }: AudioTabProps) => {
 
   const isSpeaking = useIsSpeaking(localParticipant)
 
-  const {
-    devices: devicesOut,
-    activeDeviceId: activeDeviceIdOut,
-    setActiveMediaDevice: setActiveMediaDeviceOut,
-  } = useMediaDeviceSelect({ kind: 'audiooutput' })
+  const { devices: devicesOut, setActiveMediaDevice: setActiveMediaDeviceOut } =
+    useMediaDeviceSelect({ kind: 'audiooutput' })
 
-  const {
-    devices: devicesIn,
-    activeDeviceId: activeDeviceIdIn,
-    setActiveMediaDevice: setActiveMediaDeviceIn,
-  } = useMediaDeviceSelect({ kind: 'audioinput' })
+  const { devices: devicesIn, setActiveMediaDevice: setActiveMediaDeviceIn } =
+    useMediaDeviceSelect({ kind: 'audioinput' })
 
   const itemsOut: DeviceItems = devicesOut.map((d) => ({
     value: d.deviceId,
@@ -68,15 +62,6 @@ export const AudioTab = ({ id }: AudioTabProps) => {
         defaultSelectedKey: undefined,
       }
 
-  // No API to directly query the default audio device; this function heuristically finds it.
-  // Returns the item with value 'default' if present; otherwise, returns the first item in the list.
-  const getDefaultSelectedKey = (items: DeviceItems) => {
-    if (!items || items.length === 0) return
-    const defaultItem =
-      items.find((item) => item.value === 'default') || items[0]
-    return defaultItem.value
-  }
-
   const noiseReductionAvailable = useNoiseReductionAvailable()
 
   return (
@@ -86,11 +71,9 @@ export const AudioTab = ({ id }: AudioTabProps) => {
           type="select"
           label={t('audio.microphone.label')}
           items={itemsIn}
-          defaultSelectedKey={
-            activeDeviceIdIn || getDefaultSelectedKey(itemsIn)
-          }
-          onSelectionChange={(key) => {
-            setActiveMediaDeviceIn(key as string)
+          selectedKey={audioDeviceId}
+          onSelectionChange={async (key) => {
+            await setActiveMediaDeviceIn(key as string)
             saveAudioInputDeviceId(key as string)
           }}
           {...disabledProps}
@@ -114,11 +97,9 @@ export const AudioTab = ({ id }: AudioTabProps) => {
             type="select"
             label={t('audio.speakers.label')}
             items={itemsOut}
-            defaultSelectedKey={
-              activeDeviceIdOut || getDefaultSelectedKey(itemsOut)
-            }
-            onSelectionChange={(key) => {
-              setActiveMediaDeviceOut(key as string)
+            selectedKey={audioOutputDeviceId}
+            onSelectionChange={async (key) => {
+              await setActiveMediaDeviceOut(key as string)
               saveAudioOutputDeviceId(key as string)
             }}
             {...disabledProps}