fix: wire LiveKit speaker detection to voice activation ring

- handleActiveSpeakersChanged now calls setSpeakers() with proper
  channel_id and speaker list (was incorrectly calling setLocalSpeaking
  in a loop for all users)
- setSpeakers() now updates ALL users including local (LiveKit is
  sole authority for speaking detection, no local VAD)
- Make threshold_mode optional in VoiceSpeakersPayload (LiveKit
  handles mixing internally)
- Update voice store test for new behavior

Client/tauri-client/src/lib/livekitSession.ts

@@ -21,8 +21,8 @@ import {
   voiceStore,
   setLocalMuted,
   setLocalDeafened,
-  setLocalSpeaking,
   setLocalCamera,
+  setSpeakers,
 } from "@stores/voice.store";
 import { loadPref, savePref } from "@components/settings/helpers";
 import { createLogger } from "@lib/logger";
@@ -203,26 +203,21 @@ function handleTrackUnsubscribed(
 }
 
 function handleActiveSpeakersChanged(speakers: Participant[]): void {
-  const speakerIds = new Set<number>();
+  if (currentChannelId === null) return;
+
+  const speakerUserIds: number[] = [];
   for (const speaker of speakers) {
     const userId = parseUserId(speaker.identity);
     if (userId > 0) {
-      speakerIds.add(userId);
+      speakerUserIds.push(userId);
     }
   }
 
-  // Update speaking state in voice store for all users in the channel
-  const state = voiceStore.getState();
-  const channelId = state.currentChannelId;
-  if (channelId === null) return;
-
-  const channelUsers = state.voiceUsers.get(channelId);
-  if (!channelUsers) return;
-
-  for (const [userId] of channelUsers) {
-    const isSpeaking = speakerIds.has(userId);
-    setLocalSpeaking(isSpeaking);
-  }
+  // Use setSpeakers to update all users' speaking state at once
+  setSpeakers({
+    channel_id: currentChannelId,
+    speakers: speakerUserIds,
+  });
 }
 
 function handleDisconnected(reason?: DisconnectReason): void {

Client/tauri-client/src/lib/types.ts

@@ -269,7 +269,7 @@ export interface VoiceConfigPayload {
 export interface VoiceSpeakersPayload {
   readonly channel_id: number;
   readonly speakers: readonly number[];
-  readonly threshold_mode: string;
+  readonly threshold_mode?: string;
 }
 
 export interface VoiceTokenPayload {

Client/tauri-client/src/stores/voice.store.ts

@@ -250,25 +250,18 @@ export function setVoiceConfig(payload: VoiceConfigPayload): void {
   });
 }
 
-/** Update speaking state for users from a voice_speakers event.
- *  Skips the local user — their speaking state is driven by local VAD
- *  (lower latency, same threshold). Prevents flicker from two sources
- *  disagreeing on the same field. */
+/** Update speaking state for users from a voice_speakers event or
+ *  LiveKit's ActiveSpeakersChanged. Updates ALL users including local
+ *  (LiveKit is now the sole authority for speaking detection). */
 export function setSpeakers(payload: VoiceSpeakersPayload): void {
   voiceStore.setState((prev) => {
     const existingChannel = prev.voiceUsers.get(payload.channel_id);
     if (!existingChannel) return prev;
 
-    const currentUserId = authStore.getState().user?.id ?? 0;
     const speakerSet = new Set(payload.speakers);
     const nextUsers = new Map<number, VoiceUser>();
 
     for (const [userId, user] of existingChannel) {
-      // Skip local user — local VAD is the sole authority for our own indicator
-      if (userId === currentUserId) {
-        nextUsers.set(userId, user);
-        continue;
-      }
       const isSpeaking = speakerSet.has(userId);
       if (user.speaking !== isSpeaking) {
         nextUsers.set(userId, { ...user, speaking: isSpeaking });

Client/tauri-client/tests/unit/voice.store.test.ts

@@ -346,14 +346,14 @@ describe("voice store", () => {
       }));
     });
 
-    it("does NOT overwrite local user's speaking state", () => {
-      // Local VAD says we're speaking
-      setLocalSpeaking(true);
+    it("updates local user's speaking state from LiveKit", () => {
+      // LiveKit says we're speaking
+      setSpeakers({ channel_id: 10, speakers: [1, 2], threshold_mode: "forwarding" });
       expect(voiceStore.getState().voiceUsers.get(10)?.get(1)?.speaking).toBe(true);
 
-      // Server says we're NOT speaking — local user should be unchanged
+      // LiveKit says we're NOT speaking — should update
       setSpeakers({ channel_id: 10, speakers: [2], threshold_mode: "forwarding" });
-      expect(voiceStore.getState().voiceUsers.get(10)?.get(1)?.speaking).toBe(true);
+      expect(voiceStore.getState().voiceUsers.get(10)?.get(1)?.speaking).toBe(false);
     });
 
     it("updates remote users' speaking state from server", () => {