drawers: restore focus to previous window on dismiss

When a drawer (launcher, session, sidebar, dashboard) is opened, the
HyprlandFocusGrab takes keyboard focus away from the active window.
On dismiss, focus was not restored, causing Hyprland to fall back to
focusing whatever window is under the mouse cursor.

This stores the active window address when the focus grab activates
and dispatches focuswindow to restore it when the grab deactivates.

Author: Jaden

modules/drawers/Drawers.qml

@@ -91,8 +91,20 @@ Variants {
             HyprlandFocusGrab {
                 id: focusGrab
 
+                property string previousWindowAddress: ""
+
                 active: (visibilities.launcher && Config.launcher.enabled) || (visibilities.session && Config.session.enabled) || (visibilities.sidebar && Config.sidebar.enabled) || (!Config.dashboard.showOnHover && visibilities.dashboard && Config.dashboard.enabled) || (panels.popouts.currentName.startsWith("traymenu") && (panels.popouts.current as StackView)?.depth > 1)
                 windows: [win]
+
+                onActiveChanged: {
+                    if (active) {
+                        previousWindowAddress = Hypr.activeToplevel?.lastIpcObject.address ?? "";
+                    } else if (previousWindowAddress) {
+                        Hypr.dispatch(`focuswindow address:0x${previousWindowAddress}`);
+                        previousWindowAddress = "";
+                    }
+                }
+
                 onCleared: {
                     visibilities.launcher = false;
                     visibilities.session = false;