polish(mobile): cleaner connected subtitle (was 'exit 0 B ·' with a dangling separator)

The connected view showed 'exit <rxBytes> · <city>' — the byte count duplicates
the RX stat below and the separator dangled when city was empty. Replace with a
reassuring 'Protected · <city>' (or just 'Protected').

Author: TheTrunk

clients/mobile/src/screens/ConnectScreen.tsx

@@ -69,7 +69,7 @@ export function ConnectScreen({
             <Text style={styles.flag}>{target.flag}</Text>
             <Text style={styles.country}>{target.name}</Text>
             <Text style={styles.ip}>
-              exit {vpn.status ? formatBytes(vpn.status.rxBytes) : '—'} · {target.city}
+              {target.city ? `Protected · ${target.city}` : 'Protected'}
             </Text>
           </View>
         ) : (