impl LesavkaClientApp {
    /*──────────────── mic stream ─────────────────*/
    #[cfg(not(coverage))]
    async fn voice_loop(
        ep: Channel,
        mic: Arc<MicrophoneCapture>,
        telemetry: crate::uplink_telemetry::UplinkTelemetryHandle,
    ) {
        let mut delay = Duration::from_secs(1);
        static FAIL_CNT: AtomicUsize = AtomicUsize::new(0);

        loop {
            telemetry.record_reconnect_attempt();
            let mut cli = RelayClient::new(ep.clone());
            let queue = crate::uplink_fresh_queue::FreshPacketQueue::new(AUDIO_UPLINK_QUEUE);

            let queue_stream = queue.clone();
            let telemetry_stream = telemetry.clone();
            let outbound = async_stream::stream! {
                loop {
                    let next = queue_stream.pop_fresh().await;
                    if next.dropped_stale > 0 {
                        telemetry_stream.record_stale_drop(next.dropped_stale);
                    }
                    if let Some(packet) = next.packet {
                        telemetry_stream.record_streamed(
                            queue_depth_u32(next.queue_depth),
                            duration_ms(next.delivery_age),
                        );
                        yield packet;
                        continue;
                    }
                    break;
                }
            };

            match cli.stream_microphone(Request::new(outbound)).await {
                Ok(mut resp) => {
                    let (stop_tx, stop_rx) = std::sync::mpsc::channel::<()>();
                    let mic_clone = mic.clone();
                    let telemetry_thread = telemetry.clone();
                    let queue_thread = queue.clone();
                    let mic_worker = std::thread::spawn(move || {
                        while stop_rx.try_recv().is_err() {
                            if let Some(pkt) = mic_clone.pull() {
                                trace!("🎤📤 cli  {} bytes → gRPC", pkt.data.len());
                                let enqueue_age = crate::live_capture_clock::packet_age(pkt.pts);
                                let stats = queue_thread.push(pkt, enqueue_age);
                                if stats.dropped_queue_full > 0 {
                                    telemetry_thread.record_queue_full_drop(stats.dropped_queue_full);
                                }
                                telemetry_thread.record_enqueue(
                                    queue_depth_u32(stats.queue_depth),
                                    duration_ms(enqueue_age),
                                    0.0,
                                );
                            }
                        }
                    });
                    delay = Duration::from_secs(1);
                    telemetry.record_connected();
                    while resp.get_mut().message().await.transpose().is_some() {}
                    telemetry.record_disconnect("microphone uplink stream ended");
                    queue.close();
                    let _ = stop_tx.send(());
                    let _ = mic_worker.join();
                }
                Err(e) => {
                    telemetry.record_disconnect(format!("microphone uplink connect failed: {e}"));
                    if FAIL_CNT.fetch_add(1, Ordering::Relaxed) == 0 {
                        warn!("❌🎤 connect failed: {e}");
                        warn!("⚠️🎤 further microphone‑stream failures will be logged at DEBUG");
                    } else {
                        debug!("❌🎤 reconnect failed: {e}");
                    }
                    delay = app_support::next_delay(delay);
                }
            }

            queue.close();
            tokio::time::sleep(delay).await;
        }
    }

    /*──────────────── cam stream ───────────────────*/
    #[cfg(not(coverage))]
    async fn cam_loop(
        ep: Channel,
        cam: Arc<CameraCapture>,
        telemetry: crate::uplink_telemetry::UplinkTelemetryHandle,
    ) {
        let mut delay = Duration::from_secs(1);

        loop {
            telemetry.record_reconnect_attempt();
            let mut cli = RelayClient::new(ep.clone());
            let queue = crate::uplink_fresh_queue::FreshPacketQueue::new(VIDEO_UPLINK_QUEUE);

            let queue_stream = queue.clone();
            let telemetry_stream = telemetry.clone();
            let outbound = async_stream::stream! {
                loop {
                    let next = queue_stream.pop_fresh().await;
                    if next.dropped_stale > 0 {
                        telemetry_stream.record_stale_drop(next.dropped_stale);
                    }
                    if let Some(packet) = next.packet {
                        telemetry_stream.record_streamed(
                            queue_depth_u32(next.queue_depth),
                            duration_ms(next.delivery_age),
                        );
                        yield packet;
                        continue;
                    }
                    break;
                }
            };

            match cli.stream_camera(Request::new(outbound)).await {
                Ok(mut resp) => {
                    let (stop_tx, stop_rx) = std::sync::mpsc::channel::<()>();
                    let cam_worker = std::thread::spawn({
                        let cam = cam.clone();
                        let telemetry = telemetry.clone();
                        let queue = queue.clone();
                        move || loop {
                            if stop_rx.try_recv().is_ok() {
                                break;
                            }
                            let Some(pkt) = cam.pull() else {
                                std::thread::sleep(Duration::from_millis(5));
                                continue;
                            };
                            static CNT: std::sync::atomic::AtomicU64 =
                                std::sync::atomic::AtomicU64::new(0);
                            let n = CNT.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
                            if n < 10 || n.is_multiple_of(120) {
                                tracing::trace!("📸 cli  frame#{n}  {} B", pkt.data.len());
                            }
                            tracing::trace!("📸⬆️ sent webcam AU pts={} {} B", pkt.pts, pkt.data.len());
                            let enqueue_age = crate::live_capture_clock::packet_age(pkt.pts);
                            let stats = queue.push(pkt, enqueue_age);
                            if stats.dropped_queue_full > 0 {
                                telemetry.record_queue_full_drop(stats.dropped_queue_full);
                            }
                            telemetry.record_enqueue(
                                queue_depth_u32(stats.queue_depth),
                                duration_ms(enqueue_age),
                                0.0,
                            );
                        }
                    });
                    delay = Duration::from_secs(1);
                    telemetry.record_connected();
                    while resp.get_mut().message().await.transpose().is_some() {}
                    telemetry.record_disconnect("camera uplink stream ended");
                    queue.close();
                    let _ = stop_tx.send(());
                    let _ = cam_worker.join();
                }
                Err(e) if e.code() == tonic::Code::Unimplemented => {
                    tracing::warn!("📸 server does not support StreamCamera – giving up");
                    telemetry.record_disconnect("camera uplink unavailable on server");
                    queue.close();
                    return;
                }
                Err(e) => {
                    telemetry.record_disconnect(format!("camera uplink connect failed: {e}"));
                    tracing::warn!("❌📸 connect failed: {e:?}");
                    delay = app_support::next_delay(delay);
                }
            }

            queue.close();
            tokio::time::sleep(delay).await;
        }
    }
}

#[cfg(not(coverage))]
const VIDEO_UPLINK_QUEUE: crate::uplink_fresh_queue::FreshQueueConfig =
    crate::uplink_fresh_queue::FreshQueueConfig {
        capacity: 32,
        max_age: Duration::from_secs(1),
    };

#[cfg(not(coverage))]
const AUDIO_UPLINK_QUEUE: crate::uplink_fresh_queue::FreshQueueConfig =
    crate::uplink_fresh_queue::FreshQueueConfig {
        capacity: 16,
        max_age: Duration::from_millis(400),
    };

#[cfg(not(coverage))]
fn queue_depth_u32(depth: usize) -> u32 {
    depth.try_into().unwrap_or(u32::MAX)
}

#[cfg(not(coverage))]
fn duration_ms(duration: Duration) -> f32 {
    duration.as_secs_f32() * 1_000.0
}