fix: voice message display, playback, recording UI, audio settings

- messagelist: parse content_type from JSON when DB column is empty
- messagelist: recording indicator (red dot + timer + cancel button)
- messagedelegate: editorEvent for play/pause toggle + progress bar
- messagedelegate: VoicePlayState tracking with QTimer
- InputBar: proper recordingContext (mediaDir + channelId)
- DbManager: dbPath() for media directory resolution
- AudioRecorder: peakLevel() for mic level meter
- VoiceEncoder: codec quality presets (Low/Standard/High)
- audiodevicesettingspage: Default device option first
- audiodevicesettingspage: mic level meter + test microphone
- audiodevicesettingspage: test speaker button
- audiodevicesettingspage: codec preset combo (Low/Standard/High)
- mainwindow: load opus_codec_preset from ui_state on startup

tools/chatgui/src/mainwindow.cpp

@@ -9,6 +9,7 @@
 #include "invite_link.h"
 #include "sound_manager.h"
 #include "audiorecorder.h"
+#include "voicemessageencoder.h"
 #include "animtimer.h"
 #include "../db/db_manager.h"
 #include "../transport/utun_node.h"
@@ -75,6 +76,7 @@ MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
 {
     setWindowTitle("Chat");
     resize(900, 600);
+    if (m_db) m_db->setDbPath(m_cfgDbPath);
     setupUi();
     setupTray();
     setupSoundFromConfig();
@@ -202,10 +204,12 @@ void MainWindow::setupSoundFromConfig() {
 
     if (m_recorder) {
         m_recorder->init();
-        if (m_db && m_db->isOpen())
+        if (m_db && m_db->isOpen()) {
             m_recorder->setCaptureDeviceIndex(m_db->getUiStateInt("audio_input_device", -1));
-        qDebug("MainWindow: AudioRecorder initialized (captureDevice=%d)",
-               m_recorder->captureDeviceIndex());
+            VoiceEncoder::setPreset(m_db->getUiStateInt("opus_codec_preset", 1));
+        }
+        qDebug("MainWindow: AudioRecorder initialized (captureDevice=%d, opusPreset=%d)",
+               m_recorder->captureDeviceIndex(), VoiceEncoder::preset());
     }
 }