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/settingsdialog.cpp

@@ -86,7 +86,7 @@ SettingsDialog::SettingsDialog(const QString& configPath, DbManager* db, QWidget
     m_nodesPage = new NodesPage(db, m_pages);
     m_pages->addWidget(m_nodesPage);
 
-    m_soundPage = new SoundSettingsPage(m_pages);
+    m_soundPage = new SoundSettingsPage(db, m_pages);
     m_pages->addWidget(m_soundPage);
     rightLayout->addWidget(m_pages, 1);
 
@@ -124,7 +124,7 @@ SettingsDialog::SettingsDialog(const QString& configPath, DbManager* db, QWidget
     // Load current values
     loadProfileFromConfig(m_configPath);
     m_networkPage->loadFromConfig(m_configPath);
-    m_soundPage->loadFromConfig(m_configPath);
+    m_soundPage->loadFromDb();
     m_categoryList->setCurrentRow(0);
 }
 
@@ -148,7 +148,7 @@ void SettingsDialog::onCategoryChanged(int row) {
     if (row == 2) m_databasePage->refreshStatus();
     if (row == 3) m_statusPage->refreshStatus();
     if (row == 4) m_nodesPage->refreshNodes();
-    if (row == 5) m_soundPage->loadFromConfig(m_configPath);
+    if (row == 5) m_soundPage->loadFromDb();
 }
 
 void SettingsDialog::onSave() {
@@ -188,6 +188,6 @@ void SettingsDialog::onSave() {
     f.close();
 
     m_networkPage->saveToConfig(m_configPath);
-    m_soundPage->saveToConfig(m_configPath);
+    m_soundPage->applyAndSave();
     accept();
 }