island: show mic_off in the privacy group when the mic is muted (#4027)

port 2.0

(cherry picked from commit 46a12d9152)

quickshell/Modules/DIsland/Activities/HomeCompact.qml

@@ -631,7 +631,12 @@ Item {
                 spacing: Theme.spacingXXS
 
                 PrivacyIcon {
-                    name: "mic"
+                    // Same muted check as the bar's PrivacyIndicator
+                    name: {
+                        const sourceAudio = AudioService.source?.audio;
+                        const muted = !sourceAudio || sourceAudio.muted || sourceAudio.volume === 0.0;
+                        return muted ? "mic_off" : "mic";
+                    }
                     active: PrivacyService.microphoneActive
                 }