fix: drop redundant StopBroadcastButton from nest action bar

MicMuteToggle already covers 'stop sending audio while staying on stage'
with sample-accurate resume, and LeaveStageButton covers full teardown.
StopBroadcastButton drew a Mic icon next to MicMuteToggle's Mic icon,
reading visually as two adjacent mic buttons.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/nests/room/screen/NestActionBar.kt

@@ -84,7 +84,7 @@ import com.vitorpamplona.amethyst.ui.stringRes
  * | Connected, on stage, !canBroadcast          | `[Leave the Stage]`                     |
  * | Connected, on stage, mic idle               | `[Talk] [Leave the Stage]` (+ pill)     |
  * | Connected, on stage, going live             | status chip + `[Leave the Stage]`       |
- * | Connected, on stage, broadcasting           | `[MicMute] [Stop] [Leave the Stage]`    |
+ * | Connected, on stage, broadcasting           | `[MicMute] [Leave the Stage]`           |
  * | Connected, on stage, broadcast failed       | `[Retry] [Leave the Stage]`             |
  *
  * End cluster: hand-raise (audience + connected only), react, leave room.
@@ -242,10 +242,6 @@ private fun OnStageControls(
 
         is BroadcastUiState.Broadcasting -> {
             MicMuteToggle(isMuted = broadcast.isMuted, onToggle = viewModel::setMicMuted)
-            // Stop sending audio without leaving the stage — viewer
-            // can pause the mic and resume later via Talk. Distinct
-            // from [LeaveStageButton], which also vacates the slot.
-            StopBroadcastButton(onClick = viewModel::stopBroadcast)
             LeaveStageButton(onClick = leaveStage)
         }
 
@@ -381,29 +377,6 @@ private fun TalkButton(
     }
 }
 
-/**
- * Big error-color 56dp mic button shown while broadcasting. Same
- * footprint as [TalkButton] so the on/off swap is impossible to miss.
- */
-@Composable
-private fun StopBroadcastButton(onClick: () -> Unit) {
-    FilledIconButton(
-        onClick = onClick,
-        modifier = Modifier.size(56.dp),
-        colors =
-            IconButtonDefaults.filledIconButtonColors(
-                containerColor = MaterialTheme.colorScheme.error,
-                contentColor = MaterialTheme.colorScheme.onError,
-            ),
-    ) {
-        Icon(
-            symbol = MaterialSymbols.Mic,
-            contentDescription = stringRes(R.string.nest_stop_talking),
-            modifier = Modifier.size(28.dp),
-        )
-    }
-}
-
 /**
  * Cheap broadcast-side mute toggle. Keeps the MoQ session open and
  * just stops sending audio frames; unmute is sample-accurate.

amethyst/src/main/res/values-cs-rCZ/strings.xml

@@ -484,7 +484,6 @@
     <string name="nest_audio_failed">Zvuk selhal: %1$s</string>
     <string name="nest_audio_unavailable">Zvuk pro tuto místnost není k dispozici</string>
     <string name="nest_talk">Mluvit</string>
-    <string name="nest_stop_talking">Přestat mluvit</string>
     <string name="nest_leave_stage">Opustit pódium</string>
     <string name="nest_mic_mute">Ztlumit mikrofon</string>
     <string name="nest_mic_unmute">Zapnout mikrofon</string>

amethyst/src/main/res/values-de-rDE/strings.xml

@@ -489,7 +489,6 @@ anz der Bedingungen ist erforderlich</string>
     <string name="nest_audio_failed">Audio fehlgeschlagen: %1$s</string>
     <string name="nest_audio_unavailable">Audio ist für diesen Raum nicht verfügbar</string>
     <string name="nest_talk">Sprechen</string>
-    <string name="nest_stop_talking">Aufhören zu sprechen</string>
     <string name="nest_leave_stage">Bühne verlassen</string>
     <string name="nest_mic_mute">Mikrofon stumm</string>
     <string name="nest_mic_unmute">Mikrofon aktivieren</string>

amethyst/src/main/res/values-hu-rHU/strings.xml

@@ -486,7 +486,6 @@
     <string name="nest_audio_failed">Hanghiba: %1$s</string>
     <string name="nest_audio_unavailable">A hang nem érhető el ebben a szobában</string>
     <string name="nest_talk">Beszéd</string>
-    <string name="nest_stop_talking">Beszéd befejezése</string>
     <string name="nest_leave_stage">Színpad elhagyása</string>
     <string name="nest_mic_mute">Mikrofon némítása</string>
     <string name="nest_mic_unmute">Mikrofon némításának megszüntetése</string>

amethyst/src/main/res/values-nl-rNL/strings.xml

@@ -460,7 +460,6 @@
     <string name="nest_audio_failed">Audio mislukt: %1$s</string>
     <string name="nest_audio_unavailable">Audio is niet beschikbaar voor deze ruimte</string>
     <string name="nest_talk">Praten</string>
-    <string name="nest_stop_talking">Stoppen met praten</string>
     <string name="nest_leave_stage">Podium verlaten</string>
     <string name="nest_force_mute">Spreker forceren te dempen</string>
     <string name="nest_kick_action">Kicken</string>

amethyst/src/main/res/values-pl-rPL/strings.xml

@@ -483,7 +483,6 @@
     <string name="nest_audio_failed">Błąd dźwięku: %1$s</string>
     <string name="nest_audio_unavailable">Dźwięk nie jest dostępny dla tego pokoju</string>
     <string name="nest_talk">Mów</string>
-    <string name="nest_stop_talking">Przestań mówić</string>
     <string name="nest_leave_stage">Zejść ze sceny</string>
     <string name="nest_mic_mute">Wycisz mikrofon</string>
     <string name="nest_mic_unmute">Włącz mikrofon</string>

amethyst/src/main/res/values-pt-rBR/strings.xml

@@ -484,7 +484,6 @@
     <string name="nest_audio_failed">Áudio falhou: %1$s</string>
     <string name="nest_audio_unavailable">O áudio não está disponível para esta sala</string>
     <string name="nest_talk">Falar</string>
-    <string name="nest_stop_talking">Parar de falar</string>
     <string name="nest_leave_stage">Sair do palco</string>
     <string name="nest_mic_mute">Silenciar microfone</string>
     <string name="nest_mic_unmute">Ativar microfone</string>

amethyst/src/main/res/values-sl-rSI/strings.xml

@@ -497,7 +497,6 @@ Za podpisovanje se je potrebno prijaviti s privatnim ključem</string>
     <string name="nest_audio_failed">Napaka pri zvoku: %1$s</string>
     <string name="nest_audio_unavailable">Zvok v tej sobi ni na voljo</string>
     <string name="nest_talk">Govori</string>
-    <string name="nest_stop_talking">Prenehaj govoriti</string>
     <string name="nest_leave_stage">Zapusti oder</string>
     <string name="nest_mic_mute">Izklopi mikrofon</string>
     <string name="nest_mic_unmute">Vklopi mikrofon</string>

amethyst/src/main/res/values-sv-rSE/strings.xml

@@ -484,7 +484,6 @@
     <string name="nest_audio_failed">Ljudet misslyckades: %1$s</string>
     <string name="nest_audio_unavailable">Ljud är inte tillgängligt för det här rummet</string>
     <string name="nest_talk">Tala</string>
-    <string name="nest_stop_talking">Sluta tala</string>
     <string name="nest_leave_stage">Lämna scenen</string>
     <string name="nest_mic_mute">Stäng av mikrofon</string>
     <string name="nest_mic_unmute">Slå på mikrofon</string>

amethyst/src/main/res/values-zh-rCN/strings.xml

@@ -486,7 +486,6 @@
     <string name="nest_audio_failed">音频失败: %1$s</string>
     <string name="nest_audio_unavailable">此聊天室没有音频可用</string>
     <string name="nest_talk">交谈</string>
-    <string name="nest_stop_talking">停止交谈</string>
     <string name="nest_leave_stage">离开舞台</string>
     <string name="nest_mic_mute">麦克风静音</string>
     <string name="nest_mic_unmute">取消麦克风静音</string>

amethyst/src/main/res/values/strings.xml

@@ -516,7 +516,6 @@
     <string name="nest_audio_failed">Audio failed: %1$s</string>
     <string name="nest_audio_unavailable">Audio is not available for this room</string>
     <string name="nest_talk">Talk</string>
-    <string name="nest_stop_talking">Stop talking</string>
     <string name="nest_leave_stage">Leave stage</string>
     <string name="nest_mic_mute">Mute mic</string>
     <string name="nest_mic_unmute">Unmute mic</string>