Fix window chrome positioning on Sway

Improves focused-window geometry so chrome placement stays stable across workspaces and floating containers. WindowService now exposes focused workspace X/Y, resolves workspace by name, and publishes those offsets with focused geometry. The Sway backend now tracks the active floating frame through recursion and consistently derives frame/deco/content rects from that frame. QML chrome placement was updated to use workspace-relative coordinates and simpler direct margins (removing interpolation behaviors), with safer title-bar height handling for vertical centering.

shells/desktop/shell/qml/surfaces/WindowChromeSurface.qml

@@ -10,14 +10,15 @@ Window {
     readonly property bool active: WindowService.hasFocusedWindow
         && !WindowService.focusedWindowFullscreen
         && !ShellState.launcherOpen
-    readonly property int chromeX: WindowService.focusedWindowX + Theme.windowChromeInset
+    readonly property int chromeX: WindowService.focusedWindowX
+        + Theme.windowChromeInset
+        - WindowService.focusedWorkspaceX
     readonly property int chromeY: {
-        const barY = WindowService.focusedWindowTitleBarY
-        const barH = Math.max(WindowService.focusedWindowTitleBarHeight, height)
-        return barY + Math.round((barH - height) / 2)
+        const barH = WindowService.focusedWindowTitleBarHeight
+        const centered = WindowService.focusedWindowTitleBarY
+            + Math.max(0, Math.round((barH - height) / 2))
+        return centered - WindowService.focusedWorkspaceY
     }
-    property real renderedChromeX: chromeX
-    property real renderedChromeY: chromeY
 
     title: qsTr("Nebula Window Chrome")
     color: "transparent"
@@ -29,25 +30,11 @@ Window {
     LayerShell.Window.scope: "nebula-window-chrome"
     LayerShell.Window.layer: LayerShell.Window.LayerTop
     LayerShell.Window.anchors: LayerShell.Window.AnchorLeft | LayerShell.Window.AnchorTop
-    LayerShell.Window.margins.left: Math.max(0, Math.round(renderedChromeX))
-    LayerShell.Window.margins.top: Math.max(0, Math.round(renderedChromeY))
+    LayerShell.Window.margins.left: Math.max(0, chromeX)
+    LayerShell.Window.margins.top: Math.max(0, chromeY)
     LayerShell.Window.exclusionZone: 0
     LayerShell.Window.keyboardInteractivity: LayerShell.Window.KeyboardInteractivityNone
 
-    Behavior on renderedChromeX {
-        NumberAnimation {
-            duration: 34
-            easing.type: Easing.OutQuad
-        }
-    }
-
-    Behavior on renderedChromeY {
-        NumberAnimation {
-            duration: 34
-            easing.type: Easing.OutQuad
-        }
-    }
-
     WindowControls {
         id: controls
         anchors.centerIn: parent