rx.set_clipboard does not work properly on mobile device

[tim-haselhoff]

Describe the bug
A clear and concise description of what the bug is.

The rx.set_clipboard event does not seem to work on my mobile device.

To Reproduce
Steps to reproduce the behavior:
Click the button in the example on mobile
text "Hello world" should be in the clipboard

• Code/Link to Repo:

import reflex as rx


def index() -> rx.Component:
    return rx.el.div(
        rx.button(
            "Copy",
            on_click=[
                rx.set_clipboard("Hello world"),
                rx.toast.info("Copied to clipboard", duration=2000),
            ],
        ),
    )


app = rx.App()
app.add_page(index)

Expected behavior
A clear and concise description of what you expected to happen.

set_clipboard event also sets clipboard on mobile

Screenshots
If applicable, add screenshots to help explain your problem.

Specifics (please complete the following information):

• Python Version: 3.14.6
• Reflex Version: 0.9.8
• OS: Linux on desktop, android 16
• Browser (Optional):
  Tested on chrome and firefox

Additional context
Add any other context about the problem here.

[linear-code]

ENG-11170

[harsh21234i]

This looks related to #6583 because both reports concern navigator.clipboard.writeText() failing on mobile due to browser security/user-activation rules. To determine whether this is a distinct Android regression, please include the exact browser versions, whether the app uses HTTPS or localhost, and the browser console error. Also test a minimal direct on_click=rx.set_clipboard("Hello world") handler without the toast action.

[tim-haselhoff]

Tested with Chrome version 151.0.7922.109
The app I tested it with connected via the local network however I just tested this by connecting via https and it does seem to work as intended that way.

I already tested it without the toast action, I just included it in the example to show that the event is called correctly. Same result.
Doesnt work when clicking the copy button.

On load I get a

[Violation] Permissions policy violation: unload is not allowed in this document.

However no additional error when clicking the button or anything