chatgui: per-event sound settings with DB persistence

- Sound files loaded from filesystem (sound_dir in INI config, absolute or relative)
- Per-event enable/disable + volume stored in DB (ui_state table)
- SoundManager: setEvent(), effective volume = master * per-event
- SoundSettingsPage UI: 4 event rows (checkbox + slider)
- chat_core_save_ui_state() for async DB writes via uasync thread
- DbManager::getUiStateInt() for reading settings from GUI thread
- Default sounds copied to sounds/ dir next to DB, config entries written

tools/chatgui/src/mainwindow.cpp

@@ -21,6 +21,7 @@
 #include <QSettings>
 #include <QFile>
 #include <QTextStream>
+#include <QDir>
 
 extern "C" {
 #include "../transport/chat_core.h"
@@ -85,25 +86,65 @@ MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
 
     SoundManager* sm = SoundManager::instance();
     if (sm->init()) {
+        QString soundDir;
+        QString msgInFile, msgOutFile, connectFile, disconnectFile;
+
         QFile cfgFile(m_cfgPath);
         if (cfgFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
-            bool inGui = false; bool enabled = true; int volume = 80;
+            bool inGui = false;
             QTextStream in(&cfgFile);
             while (!in.atEnd()) {
                 QString line = in.readLine().trimmed();
                 if (line == "[gui]") { inGui = true; continue; }
                 if (line.startsWith("[") && line.endsWith("]")) inGui = false;
                 if (!inGui) continue;
-                if (line.startsWith("sound_enabled="))
-                    enabled = line.mid(15).trimmed() != "0";
-                else if (line.startsWith("sound_volume="))
-                    volume = line.mid(13).trimmed().toInt();
+                if (line.startsWith("sound_dir="))
+                    soundDir = line.mid(10).trimmed();
+                else if (line.startsWith("sound_msg_incoming="))
+                    msgInFile = line.mid(19).trimmed();
+                else if (line.startsWith("sound_msg_outgoing="))
+                    msgOutFile = line.mid(19).trimmed();
+                else if (line.startsWith("sound_connect="))
+                    connectFile = line.mid(14).trimmed();
+                else if (line.startsWith("sound_disconnect="))
+                    disconnectFile = line.mid(17).trimmed();
             }
             cfgFile.close();
-            sm->setEnabled(enabled);
-            sm->setVolume(volume / 100.0f);
         }
-        sm->loadSound("msg_incoming", ":/sounds/msg_incoming.mp3");
+
+        if (soundDir.isEmpty()) soundDir = "sounds";
+        QDir binDir(QApplication::applicationDirPath());
+        QString baseDir = QDir::isAbsolutePath(soundDir) ? soundDir
+                          : binDir.absoluteFilePath(soundDir);
+        auto resolvePath = [&baseDir](const QString& file) -> QString {
+            if (file.isEmpty()) return {};
+            return QDir::cleanPath(baseDir + "/" + file);
+        };
+
+        struct { const char* name; QString file; } events[] = {
+            {"msg_incoming", msgInFile},
+            {"msg_outgoing", msgOutFile},
+            {"connect",      connectFile},
+            {"disconnect",   disconnectFile},
+        };
+        for (auto& e : events) {
+            if (!e.file.isEmpty()) {
+                QString path = resolvePath(e.file);
+                sm->loadSound(e.name, path);
+            }
+        }
+
+        if (m_db && m_db->isOpen()) {
+            sm->setEnabled(m_db->getUiStateInt("sound_enabled", 1));
+            sm->setVolume(m_db->getUiStateInt("sound_volume", 80) / 100.0f);
+            QString soundEvents[] = {"msg_incoming", "msg_outgoing", "connect", "disconnect"};
+            for (int i = 0; i < 4; i++) {
+                const QString& ek = soundEvents[i];
+                bool on = m_db->getUiStateInt(QStringLiteral("sound_%1_on").arg(ek), i == 0 ? 1 : 0);
+                float ev = m_db->getUiStateInt(QStringLiteral("sound_%1_vol").arg(ek), 80) / 100.0f;
+                sm->setEvent(ek, on, ev);
+            }
+        }
     }
 
     if (m_db) {