[ux] Add audio device prompt suppression controls

docs/audio-pipeline.md

@@ -209,6 +209,15 @@ When at least one new device appears, AetherSDR shows a selection dialog with
 the current input/output highlighted, newly detected devices marked, and system
 defaults available as explicit choices.
 
+The dialog includes a "Don't ask me again" checkbox. Checking it persists
+`SuppressAudioDeviceNotifications=True` in `AppSettings`; future device-add
+events skip the selection dialog while preserving the existing fallback to
+system default when a selected device disappears.
+
+The same setting is exposed in Radio Setup > Audio > PC Audio Devices as
+"Prompt on Audio Device Changes"; that checkbox is checked when notifications
+are enabled and unchecked when the suppression setting is active.
+
 Accepting the dialog queues `AudioEngine::setInputDevice()` and
 `AudioEngine::setOutputDevice()` onto the audio worker thread. Those setters are
 the only place that persists the chosen device IDs and restarts the affected

src/gui/AudioDeviceChangeDialog.cpp

@@ -5,6 +5,7 @@
 
 #include <QAudioDevice>
 #include <QColor>
+#include <QCheckBox>
 #include <QFrame>
 #include <QFont>
 #include <QHBoxLayout>
@@ -37,6 +38,11 @@ const char* kDialogStyle =
     "QLabel#title { color: #ffffff; background: transparent; font-size: 18px; font-weight: bold; }"
     "QLabel#body { color: #c8d8e8; background: transparent; }"
     "QLabel#sectionLabel { color: #00b4d8; background: transparent; font-weight: bold; }"
+    "QCheckBox { color: #c8d8e8; spacing: 8px; }"
+    "QCheckBox::indicator { width: 16px; height: 16px;"
+    "  border: 1px solid #304050; border-radius: 3px; background: #0a0a14; }"
+    "QCheckBox::indicator:hover { border-color: #00b4d8; }"
+    "QCheckBox::indicator:checked { background: #00b4d8; border-color: #00c8f0; }"
     "QListWidget {"
     "  background: #0a0a14;"
     "  border: 1px solid #304050;"
@@ -299,6 +305,11 @@ AudioDeviceChangeDialog::AudioDeviceChangeDialog(
     buttonRow->setContentsMargins(0, 4, 0, 0);
     buttonRow->setSpacing(8);
 
+    m_dontAskAgainCheck = new QCheckBox(tr("Don't ask me again"), content);
+    m_dontAskAgainCheck->setCursor(Qt::PointingHandCursor);
+    buttonRow->addWidget(m_dontAskAgainCheck);
+    buttonRow->addStretch(1);
+
     auto* cancel = new QPushButton(tr("Cancel"), content);
     cancel->setObjectName("cancelButton");
     cancel->setCursor(Qt::PointingHandCursor);
@@ -377,4 +388,9 @@ QAudioDevice AudioDeviceChangeDialog::selectedOutputDevice() const
     return selectedDevice(m_outputList, m_outputDevices);
 }
 
+bool AudioDeviceChangeDialog::dontAskAgainChecked() const
+{
+    return m_dontAskAgainCheck && m_dontAskAgainCheck->isChecked();
+}
+
 } // namespace AetherSDR

src/gui/AudioDeviceChangeDialog.h

@@ -6,6 +6,7 @@
 #include <QList>
 
 class QListWidget;
+class QCheckBox;
 class QVBoxLayout;
 class QWidget;
 
@@ -23,6 +24,7 @@ class AudioDeviceChangeDialog : public QDialog {
 
     QAudioDevice selectedInputDevice() const;
     QAudioDevice selectedOutputDevice() const;
+    bool dontAskAgainChecked() const;
     void setFramelessMode(bool on);
 
 private:
@@ -33,6 +35,7 @@ class AudioDeviceChangeDialog : public QDialog {
     QVBoxLayout* m_bodyLayout{nullptr};
     QListWidget* m_inputList{nullptr};
     QListWidget* m_outputList{nullptr};
+    QCheckBox* m_dontAskAgainCheck{nullptr};
     QList<QAudioDevice> m_inputDevices;
     QList<QAudioDevice> m_outputDevices;
 };

src/gui/MainWindow.cpp

@@ -227,6 +227,8 @@ constexpr int kSwrSweepTuneStopTimeoutMs = 1800;
 constexpr int kSwrSweepTgxlRestoreTimeoutMs = 3500;
 constexpr int kSwrSweepMaxPoints = 260;
 constexpr double kMemoryRevealTargetToleranceMhz = 0.000001;
+constexpr const char* kSuppressAudioDeviceNotificationsKey =
+    "SuppressAudioDeviceNotifications";
 
 QList<QByteArray> audioDeviceIds(const QList<QAudioDevice>& devices)
 {
@@ -6456,6 +6458,18 @@ void MainWindow::handleAudioDeviceListChanged()
         return;
     }
 
+    const bool suppressAudioDeviceNotifications =
+        AppSettings::instance()
+            .value(kSuppressAudioDeviceNotificationsKey, "False")
+            .toString() == "True";
+    if (suppressAudioDeviceNotifications) {
+        if (resetInput || resetOutput)
+            resetMissingAudioDevicesToDefault(resetInput,
+                                              resetOutput,
+                                              reinitializePcInput);
+        return;
+    }
+
     m_audioDeviceDialogOpen = true;
     AudioDeviceChangeDialog dialog(inputDevices,
                                    outputDevices,
@@ -6467,6 +6481,12 @@ void MainWindow::handleAudioDeviceListChanged()
     const int result = dialog.exec();
     m_audioDeviceDialogOpen = false;
 
+    if (dialog.dontAskAgainChecked()) {
+        auto& settings = AppSettings::instance();
+        settings.setValue(kSuppressAudioDeviceNotificationsKey, "True");
+        settings.save();
+    }
+
     if (result == QDialog::Accepted) {
         const QAudioDevice selectedInput = dialog.selectedInputDevice();
         const QAudioDevice selectedOutput = dialog.selectedOutputDevice();

src/gui/RadioSetupDialog.cpp

@@ -76,6 +76,9 @@ static const QString kEditStyle =
     "QLineEdit { background: #1a2a3a; border: 1px solid #304050; "
     "border-radius: 3px; color: #c8d8e8; font-size: 12px; padding: 2px 4px; }";
 
+static constexpr const char* kSuppressAudioDeviceNotificationsKey =
+    "SuppressAudioDeviceNotifications";
+
 static QString normalizedOscillatorValue(QString value)
 {
     value = value.trimmed().toLower();
@@ -1889,6 +1892,21 @@ QWidget* RadioSetupDialog::buildAudioTab()
     outRow->addWidget(outCombo, 1);
     pcLayout->addLayout(outRow);
 
+    auto* promptCheck = new QCheckBox("Prompt on Audio Device Changes");
+    promptCheck->setStyleSheet("QCheckBox { color: #c8d8e8; font-size: 11px; }");
+    promptCheck->setToolTip("Show the Audio Device Detected dialog when a new PC audio device appears.");
+    const bool suppressAudioDeviceNotifications =
+        AppSettings::instance()
+            .value(kSuppressAudioDeviceNotificationsKey, "False")
+            .toString() == "True";
+    promptCheck->setChecked(!suppressAudioDeviceNotifications);
+    connect(promptCheck, &QCheckBox::toggled, this, [](bool on) {
+        auto& s = AppSettings::instance();
+        s.setValue(kSuppressAudioDeviceNotificationsKey, on ? "False" : "True");
+        s.save();
+    });
+    pcLayout->addWidget(promptCheck);
+
     // Wire device changes to AudioEngine
     if (m_audio) {
         // Route through QueuedConnection so setInputDevice/setOutputDevice