Reduce Linux voice capture latency and verify device timing

tools/chatgui/src/call_audio_engine.cpp

@@ -59,8 +59,8 @@ bool CallAudioEngine::openCapture() {
     if (!context) return false;
     ma_device_config config = ma_device_config_init(ma_device_type_capture);
     config.capture.format = ma_format_s16; config.capture.channels = 1; config.sampleRate = CALL_AUDIO_SAMPLE_RATE;
-    config.periodSizeInMilliseconds = CALL_AUDIO_FRAME_MS;
-    DEBUG_INFO(DEBUG_CATEGORY_CALL, "CallAudio: capture requested period=%dms; actual period reported by device", CALL_AUDIO_FRAME_MS);
+    config.periodSizeInMilliseconds = 20; // Прежний запрос для остальных платформ/backends.
+    AudioDevice::requestLowLatency(context, config);
     ma_device_id id;
     bool selected = SoundManager::deviceId(m_captureId, &id);
     if (selected) config.capture.pDeviceID = &id;