fix(calls): the call-bar output menu uses the call frame's devices (#310)

deviceIds are hashed per frame/origin, so the ids the menu got from the
chat page's enumerateDevices() were unknown inside the call iframe: the
fork fell back to the default output while the menu showed a tick on
the chosen device. Handle io.lotus.audio_output_state (also silencing
the fork's "host did not ack" log) and build the menu from the fork's
list and effective selection; older forks fall back to the old list.

Fixes #310

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/plugins/call/CallControl.ts

@@ -54,6 +54,27 @@ export function parseForkHotkeyReport(data: unknown): ForkHotkeyReport | null {
   };
 }
 
+export type AudioOutputOption = { id: string; label: string };
+export const AUDIO_OUTPUT_STATE = 'audio_output_state';
+
+/** Pure: parse the fork's `io.lotus.audio_output_state` (#310). */
+export function parseAudioOutputState(
+  data: unknown,
+): { deviceId?: string; available?: AudioOutputOption[] } | undefined {
+  if (typeof data !== 'object' || data === null) return undefined;
+  const { deviceId, available } = data as { deviceId?: unknown; available?: unknown };
+  const list = Array.isArray(available)
+    ? available.filter(
+        (o): o is AudioOutputOption =>
+          typeof o === 'object' &&
+          o !== null &&
+          typeof (o as AudioOutputOption).id === 'string' &&
+          typeof (o as AudioOutputOption).label === 'string',
+      )
+    : undefined;
+  return { deviceId: typeof deviceId === 'string' ? deviceId : undefined, available: list };
+}
+
 export class CallControl extends EventEmitter implements CallControlState {
   private state: CallControlState;
 
@@ -210,6 +231,25 @@ export class CallControl extends EventEmitter implements CallControlState {
     this.sendAudioOutput(deviceId);
   }
 
+  // [Gitea #310] deviceIds are hashed per frame/origin, so ids from the
+  // host's own enumerateDevices() mean nothing inside the call iframe. The
+  // fork reports its outputs (ids valid in the frame) and its effective
+  // selection; the call bar's menu uses those when present.
+  private _audioOutputs: AudioOutputOption[] | undefined;
+
+  public get audioOutputs(): AudioOutputOption[] | undefined {
+    return this._audioOutputs;
+  }
+
+  /** The fork's `io.lotus.audio_output_state` report. */
+  public onAudioOutputState(data: unknown) {
+    const report = parseAudioOutputState(data);
+    if (!report) return;
+    this._audioOutputs = report.available;
+    if (report.deviceId !== undefined) this._audioOutputId = report.deviceId;
+    this.emit(AUDIO_OUTPUT_STATE);
+  }
+
   private sendAudioOutput(deviceId: string): void {
     if (!this.joined) return;
     this.call.transport.send('io.lotus.set_audio_output', { deviceId }).catch(() => undefined);