Full mixer implementation — tray, popup, prefs, devices tab with port indicators

Adds the complete tmix feature set built since the initial skeleton:
balance knob, level meters, KLed mute button, system tray with scroll-wheel
volume and recording indicator, tray popup, preferences dialog, right-click
context menus, single-instance enforcement, scroll area, window geometry
persistence, and Devices tab with PA card profile switcher and live port
availability indicators (2-column layout, in-place updates on plug/unplug).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/src/ui/preferencesdlg.h b/src/ui/preferencesdlg.h
new file mode 100644
index 0000000..94f5682
--- /dev/null
+++ b/src/ui/preferencesdlg.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <kdialogbase.h>
+
+class TQCheckBox;
+class TQSpinBox;
+
+class PreferencesDlg : public KDialogBase
+{
+    TQ_OBJECT
+
+public:
+    PreferencesDlg( TQWidget *parent = 0 );
+    void load();
+
+signals:
+    void settingsChanged();
+
+protected slots:
+    void slotOk();
+    void slotApply();
+
+private:
+    void save();
+
+    TQCheckBox *m_dockInTray;
+    TQCheckBox *m_showPopup;
+    TQCheckBox *m_showRecTray;
+    TQCheckBox *m_confirmQuit;
+    TQSpinBox  *m_scrollStep;
+
+    TQCheckBox *m_noTabs;
+    TQCheckBox *m_showOutput;
+    TQCheckBox *m_showInput;
+    TQCheckBox *m_showPlayback;
+    TQCheckBox *m_showRecording;
+};