audio: only show mic volume OSD through DMS IPCs, not external source

changes
fixes #2790
port 1.5

quickshell/Modules/DankBar/Widgets/ControlCenterButton.qml

@@ -255,6 +255,7 @@ BasePill {
         const newVolume = delta > 0 ? Math.min(100, currentVolume + step) : Math.max(0, currentVolume - step);
         AudioService.source.audio.muted = false;
         AudioService.source.audio.volume = newVolume / 100;
+        AudioService.micVolumeChanged();
     }
 
     function handleBrightnessWheel(delta) {

quickshell/Modules/OSD/MicVolumeOSD.qml

@@ -23,10 +23,10 @@ DankOSD {
     Connections {
         target: AudioService.source?.audio ?? null
 
+        // Sync only - apps adjusting mic gain (WebRTC AGC etc.) fire this
+        // constantly, so external volume changes must not surface the OSD
         function onVolumeChanged() {
             root._syncVolume();
-            if (SettingsData.osdMicVolumeEnabled)
-                root.show();
         }
 
         function onMutedChanged() {
@@ -38,6 +38,12 @@ DankOSD {
     Connections {
         target: AudioService
 
+        function onMicVolumeChanged() {
+            root._syncVolume();
+            if (SettingsData.osdMicVolumeEnabled)
+                root.show();
+        }
+
         function onSourceChanged() {
             root._syncVolume();
             if (root.shouldBeVisible && SettingsData.osdMicVolumeEnabled)

quickshell/Services/AudioService.qml

@@ -61,6 +61,7 @@ Singleton {
     readonly property int wheelVolumeStep: SettingsData.audioWheelScrollAmount
 
     signal micMuteChanged
+    signal micVolumeChanged
     signal audioOutputCycled(string deviceName, string deviceIcon)
     signal deviceAliasChanged(string nodeName, string newAlias)
     signal wireplumberReloadStarted
@@ -905,6 +906,7 @@ EOFCONFIG
 
         const clampedVolume = Math.max(0, Math.min(100, percentage));
         root.source.audio.volume = clampedVolume / 100;
+        micVolumeChanged();
         return `Microphone volume set to ${clampedVolume}%`;
     }
 
@@ -929,6 +931,7 @@ EOFCONFIG
         const newVolume = Math.max(0, Math.min(100, currentVolume + stepValue));
 
         root.source.audio.volume = newVolume / 100;
+        micVolumeChanged();
         return `Microphone volume increased to ${newVolume}%`;
     }
 
@@ -944,6 +947,7 @@ EOFCONFIG
         const newVolume = Math.max(0, Math.min(100, currentVolume - stepValue));
 
         root.source.audio.volume = newVolume / 100;
+        micVolumeChanged();
         return `Microphone volume decreased to ${newVolume}%`;
     }