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, 7 insertions, 0 deletions

diff --git a/src/model/audiodevice.h b/src/model/audiodevice.h
index e753fc9..854ba35 100644
--- a/src/model/audiodevice.h
+++ b/src/model/audiodevice.h
@@ -21,12 +21,16 @@ public:
     virtual ~AudioDevice() {}
 
     virtual TQString     name()     const = 0;
+    virtual TQString     iconName() const = 0;
     virtual Category    category() const = 0;
 
     virtual int  volume()            const = 0;  // 0-100
     virtual bool muted()             const = 0;
+    virtual int  pan()               const = 0;  // -50 (left) .. 0 .. +50 (right)
+
     virtual void setVolume( int v )        = 0;
     virtual void setMuted( bool m )        = 0;
+    virtual void setPan( int p )           = 0;
 
     // Creates the widget for this device. Caller takes ownership.
     virtual TQWidget *createWidget( TQWidget *parent ) = 0;
@@ -34,5 +38,8 @@ public:
 signals:
     void volumeChanged( int v );
     void muteChanged( bool m );
+    void panChanged( int p );
+    void levelChanged( float level );
     void nameChanged( const TQString &name );
+    void recordingActiveChanged( bool active );
 };