Merge upstream v4.12.3 (Element Call 0.20.1) into lotus

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/components/CallEmbedProvider.tsx

@@ -192,11 +192,11 @@ function IncomingCall({ dm, info, onIgnore, onAnswer, onReject }: IncomingCallPr
                       />
                     </Avatar>
                   </Box>
-                  <Box grow="Yes" direction="Column" gap="100">
+                  <Box grow="Yes" direction="Column" gap="100" alignItems="Center">
                     <Text size="H3" align="Center" truncate>
                       {roomName}
                     </Text>
-                    <Text size="T300">
+                    <Text size="T300" align="Center">
                       {info.intent === 'video' ? 'Incoming Video Call' : 'Incoming Voice Call'}
                     </Text>
                   </Box>
@@ -283,6 +283,7 @@ function IncomingCallListener({ callEmbed, joined }: IncomingCallListenerProps)
       // only process rtc notification reference events.
       // we do not want to wait to decrypt all events.
       if (event.getRelation()?.rel_type !== RelationType.Reference) return;
+      if (room?.isCallRoom()) return;
 
       if (event.isEncrypted()) {
         if (!event.isBeingDecrypted()) {