bug: Keyboard events cannot prevent system events.

[zangxx66]

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• I have searched the opened issues and there are no duplicates

Describe the bug

In macOS, pressing Command + Q will immediately terminate the program and cannot trigger a custom keyboard event.

Code sample

Code

import flet as ft


def main(page: ft.Page):
    async def handle_exit(_: ft.Event[ft.TextButton]):
        await page.window.close()

    def show_exit_confirm():
        page.show_dialog(
            ft.AlertDialog(
                title=ft.Text("info"),
                content=ft.Text("Do you want to quit?"),
                actions=[
                    ft.TextButton("Cancel", on_click=lambda e: page.pop_dialog()),
                    ft.TextButton("Quit", on_click=handle_exit),
                ],
            )
        )

    def on_keyboard(e: ft.KeyboardEvent):
        if e.meta and e.key == "Q":
            show_exit_confirm()

    page.on_keyboard_event = on_keyboard
    page.add(
        ft.Text("hello workd")
    )


ft.run(main)

To reproduce

1.uv run flet run main.py run code
2.pressing Command + Q
3.program immediately exits

Expected behavior

I created a dialog box for exit confirmation. I hope that when the exit shortcut key is triggered, an exit confirmation dialog will be displayed first instead of directly terminating the program.

Screenshots / Videos

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Operating System

macOS

Operating system details

macOS 15

Flet version

0.82.2

Regression

I'm not sure / I don't know

Suggestions

No response

Logs

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Additional details

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