fix(popups): delay focus grab to prevent immediate dismissal

[enhulsman]

Problem

The overview never actually stayed open for me. Every time I hit my keybind it would either close immediately (seeing nothing) or flash briefly before disappearing. The presets popup had the same issue occasionally.

After looking into it, HyprlandFocusGrab is bound directly via active: overviewOpen (and active: presetsOpen), which activates the grab the instant the QML property changes. On Wayland, the PanelWindow surface may not yet be mapped by the compositor at that point, so Hyprland processes the grab request, finds no valid surface, and immediately fires onCleared, closing the popup before you can interact with it.

Essentially a race condition that depends on compositor timing.

Solution

Replace the direct active property binding with a 50ms Timer that starts when the popup opens. This gives the Wayland compositor time to map the surface before the focus grab is activated. On close, the timer is stopped and the grab is explicitly deactivated.

50ms is conservative since surface mapping typically completes within a single frame (~4-16ms), but it provides a safe margin without being perceptible.

Files Changed

• modules/widgets/overview/OverviewPopup.qml: Timer-based grab activation, removed direct binding
• modules/widgets/presets/PresetsPopup.qml: Same pattern

Testing

1. Open/close overview rapidly (~10 times), should never self-dismiss
2. Open/close presets popup rapidly, same expectation
3. Click outside an open popup, should still dismiss correctly via onCleared
4. Test on multi-monitor (each screen gets its own PanelWindow)