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, 20 insertions, 0 deletions

diff --git a/src/ui/tmixapp.cpp b/src/ui/tmixapp.cpp
new file mode 100644
index 0000000..628e475
--- /dev/null
+++ b/src/ui/tmixapp.cpp
@@ -0,0 +1,20 @@
+#include "tmixapp.h"
+#include "mixerwindow.h"
+
+TmixApp::TmixApp() : KUniqueApplication(), m_win(0), m_firstInstance(true) {}
+
+int TmixApp::newInstance()
+{
+    if ( m_firstInstance ) {
+        m_firstInstance = false;
+        return 0;
+    }
+    if ( m_win ) {
+        m_win->show();
+        m_win->raise();
+        m_win->setActiveWindow();
+    }
+    return 0;
+}
+
+#include "tmixapp.moc"