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.

core/windows/WindowService.hpp

@@ -39,6 +39,8 @@ class WindowService : public QObject
     Q_PROPERTY(int focusedWindowDecoHeight READ focusedWindowDecoHeight NOTIFY focusedWindowGeometryChanged)
     Q_PROPERTY(int focusedWindowTitleBarY READ focusedWindowTitleBarY NOTIFY focusedWindowGeometryChanged)
     Q_PROPERTY(int focusedWindowTitleBarHeight READ focusedWindowTitleBarHeight NOTIFY focusedWindowGeometryChanged)
+    Q_PROPERTY(int focusedWorkspaceX READ focusedWorkspaceX NOTIFY focusedWindowGeometryChanged)
+    Q_PROPERTY(int focusedWorkspaceY READ focusedWorkspaceY NOTIFY focusedWindowGeometryChanged)
 
 public:
     enum SnapEdge {
@@ -73,6 +75,8 @@ public:
     int focusedWindowDecoHeight() const;
     int focusedWindowTitleBarY() const;
     int focusedWindowTitleBarHeight() const;
+    int focusedWorkspaceX() const;
+    int focusedWorkspaceY() const;
 
     Q_INVOKABLE bool focusWindow(const QString &windowId);
     Q_INVOKABLE bool closeWindow(const QString &windowId);
@@ -124,5 +128,7 @@ private:
     int m_focusedWindowDecoHeight = 0;
     int m_focusedWindowTitleBarY = 0;
     int m_focusedWindowTitleBarHeight = 0;
+    int m_focusedWorkspaceX = 0;
+    int m_focusedWorkspaceY = 0;
     QTimer *m_geometryTimer = nullptr;
 };