feat(call): host half of the 0.25.0-lotus.2 fork changes

- io.lotus.request_state: when the fork's lotus handlers (re)register
  (an EC-side remount that doesn't unmount us) we re-send deafen, quality
  and the focus pin, and the decoration pusher re-pushes its roster —
  decorations and the pin no longer vanish for the rest of the call
  (element-call#17).
- focus_participant carries the per-device media id from call_state
  (speaking device preferred) so a multi-device user pins the right
  device (element-call#30).
- injectAudio returns the fork's reply; when it refuses with
  reason:"muted" the soundboard shows "Unmute your microphone…" instead
  of playing the clip locally as if it went out (element-call#13).

All backwards compatible with the 0.25.0-lotus.1 bundle (unknown action
is acked; missing reply fields default to "played").

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA

src/app/features/call/CallSoundboard.tsx

@@ -115,7 +115,18 @@ export function CallSoundboard({ callEmbed }: CallSoundboardProps) {
       try {
         const url = await resolveClipObjectUrl(mx, flat.clip.url);
         const vol = (flat.clip.volume / 100) * master;
-        callEmbed.control.injectAudio(url, vol);
+        const result = await callEmbed.control.injectAudio(url, vol);
+        if (!result.played) {
+          // [EC#13] Refused fork-side (only reason today: local mic muted) —
+          // don't play it locally either, or the user would think it went out.
+          setError(
+            result.reason === 'muted'
+              ? 'Unmute your microphone to play a soundboard clip.'
+              : 'Could not play that clip.',
+          );
+          done();
+          return;
+        }
         const audio = playClipLocally(url, vol);
         if (audio) {
           audio.addEventListener('ended', done, { once: true });