move cpu core consumer tracking into applet, move mpris art caching into service

shell/applets/CpuApplet.qml

@@ -12,6 +12,19 @@ Column {
 
     property bool active: true
 
+    property bool _coreActive: false
+    onActiveChanged: {
+        if (active && !_coreActive) {
+            _coreActive = true;
+            S.SystemStats.coreConsumers++;
+        } else if (!active && _coreActive) {
+            _coreActive = false;
+            S.SystemStats.coreConsumers--;
+        }
+    }
+    Component.onDestruction: if (_coreActive)
+        S.SystemStats.coreConsumers--
+
     // Per-core rows
     Repeater {
         model: root.cores.length

shell/dock/AppletDock.qml

@@ -374,6 +374,7 @@ PanelWindow {
                     players: S.MprisService.players
                     playing: S.MprisService.playing
                     accentColor: root._accent
+                    cachedArt: S.MprisService.cachedArt
                     playerIdx: S.MprisService.playerIdx
                     onPlayerSwitched: idx => S.MprisService.switchPlayer(idx)
                 }

shell/modules/CpuModule.qml

@@ -27,18 +27,6 @@ M.BarModule {
     readonly property var _coreMaxFreq: S.SystemStats.cpuCoreMaxFreq
     readonly property var _coreTypes: S.SystemStats.cpuCoreTypes
 
-    property bool _coreConsumerActive: false
-
-    on_ShowPanelChanged: {
-        if (_showPanel && !_coreConsumerActive) {
-            _coreConsumerActive = true;
-            S.SystemStats.coreConsumers++;
-        } else if (!_showPanel && _coreConsumerActive) {
-            _coreConsumerActive = false;
-            S.SystemStats.coreConsumers--;
-        }
-    }
-
     property M.ProcessList _procs: M.ProcessList {
         sortBy: "cpu"
         active: root._showPanel

shell/modules/MprisModule.qml

@@ -22,7 +22,7 @@ M.BarModule {
             players: root._players
             playing: root.playing
             accentColor: root.accentColor
-            cachedArt: root._cachedArt
+            cachedArt: S.MprisService.cachedArt
             cavaBars: root._cavaBars
             playerIdx: S.MprisService.playerIdx
             onPlayerSwitched: idx => {
@@ -35,25 +35,6 @@ M.BarModule {
     readonly property var _players: S.MprisService.players
     readonly property MprisPlayer player: S.MprisService.player
     readonly property bool playing: S.MprisService.playing
-    property string _cachedArt: ""
-    property string _artTrack: ""
-
-    readonly property string _artUrl: player?.trackArtUrl ?? ""
-    readonly property string _currentTrack: player?.trackTitle ?? ""
-    on_ArtUrlChanged: if (_artUrl)
-        _cachedArt = _artUrl
-    on_CurrentTrackChanged: if (_currentTrack !== _artTrack) {
-        _artTrack = _currentTrack;
-        _cachedArt = _artUrl || "";
-    }
-
-    // Preload art while panel is hidden
-    Image {
-        visible: false
-        source: root._cachedArt
-        asynchronous: true
-    }
-
     // Cava visualizer - 16 bars, raw output mode
     property var _cavaBars: Array(16).fill(0)
     property bool _cavaActive: false

shell/services/MprisService.qml

@@ -118,6 +118,18 @@ QtObject {
             _selectedIdentity = players[chosen].identity ?? "";
     }
 
+    // Album art caching - persists across panel/dock collapse
+    property string cachedArt: ""
+    property string _artTrack: ""
+    readonly property string _artUrl: player?.trackArtUrl ?? ""
+    readonly property string _currentTrack: player?.trackTitle ?? ""
+    on_ArtUrlChanged: if (_artUrl)
+        cachedArt = _artUrl
+    on_CurrentTrackChanged: if (_currentTrack !== _artTrack) {
+        _artTrack = _currentTrack;
+        cachedArt = _artUrl || "";
+    }
+
     function switchPlayer(idx) {
         playerIdx = idx;
         if (players[idx])