fix(jam): prevent self from showing in moderation menu during host takeover

Fixes race condition where guest taking over as host would see 'manage'
button for themselves during presence propagation delay (MQTT round-trip).

- Add localClientId to UI state combine
- Update canModerate: role == Host && !participant.isHost && participant.id != localClientId

composeApp/src/commonMain/kotlin/org/spotube/spotube/modules/jam/JamViewModel.kt

@@ -102,7 +102,9 @@ class JamViewModel(
         codeCopied,
         snapshotFlow { codeInput.text.toString() },
         participantMenu,
-        isLeaving
+        isLeaving,
+        // Local client ID to exclude self from moderation menu
+        jamRoomService.participantClientId
     ) { values ->
         @Suppress("UNCHECKED_CAST")
         val role = values[0] as JamRole?
@@ -116,6 +118,7 @@ class JamViewModel(
         val localError = values[6] as String?
         val busy = values[8] as Boolean
         val brokerConfigured = !settings?.jamBroker?.host.isNullOrBlank()
+        val localClientId = values[13] as String
 
         JamUiState(
             isActive = role != null,
@@ -127,7 +130,8 @@ class JamViewModel(
                     displayName = participant.displayName,
                     initial = participant.displayName.firstOrNull()?.uppercase() ?: "?",
                     isHost = participant.isHost,
-                    canModerate = role == JamRole.Host && !participant.isHost,
+                    // Host can moderate OTHER participants only (not self)
+                    canModerate = role == JamRole.Host && !participant.isHost && participant.id != localClientId,
                     menuExpanded = values[11] == participant.id
                 )
             },