fix: popout/popup windows freeze when not focused

[Niketion]

Problem

When a popup/popout window is focused, the main window stops updating visually, and vice versa. This makes the app feel broken when using multiple windows — whichever window isn't focused appears completely frozen.

Root Cause

The app tick/update loop uses iced::window::frames(), which only emits frame events for the currently focused window. When focus moves to a popout, the main window stops receiving frame events and vice versa.

Fix

Replace iced::window::frames() with iced::time::every(Duration::from_millis(16)) (~60fps), which fires on a wall-clock interval independent of window focus. All windows now keep updating regardless of which one is focused.

-        let tick = iced::window::frames().map(Message::Tick);
+        let tick = iced::time::every(Duration::from_millis(16)).map(Message::Tick);

Why 16ms

Matches roughly 60fps, consistent with the previous frame-driven behavior when a window was focused. The interval could be tuned further if needed (e.g. 33ms for ~30fps to reduce CPU usage).

[Niketion]

After discussing this with @akenshaw, we reached the conclusion that this PR is not applicable for now. We’ll reconsider it at a later time

root cause:
rust-windowing/winit#3648