Saber cannot open external browser on Moto Edge 50 (Android 15) when logging into self-hosted Nextcloud

[chenhaichen1002]

Device:

Moto Edge 50

Android 15 (latest update)

Issue Summary:
When trying to log into a self-hosted Nextcloud server, Saber cannot open an external browser.
No browser window appears, no error is shown, and the login flow never starts.

When using the official Nextcloud server (nextcloud.com) inside Saber, the browser opens correctly.
Only the self-hosted domain fails to trigger the browser intent.

Default browser: Chrome
Behavior:

Chrome opens normally for any link when tapped manually

Chrome also works with other apps

Only Saber → external browser → no action at all

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Steps to reproduce:

1. Open Saber

2. Add new Nextcloud account

3. Enter self-hosted URL, e.g.:
   https://nextcloud.xxxxxx.com

4. Press "Log in"

5. Expected: Chrome should open the login flow (/login/v2)

6. Actual: Nothing happens (no browser popup, no error)

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Expected behavior:

Saber should open the external browser (Chrome) and load the Nextcloud Login Flow v2 page.

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Actual behavior:

No browser opens

No error message

UI stays on the same screen

This happens only with self-hosted Nextcloud

Official Nextcloud login works normally

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Additional information / What I tried:

Chrome set as default browser

Chrome works normally outside Saber

Reinstalled Saber

Confirmed HTTPS / valid certificate

Confirmed Nextcloud server web UI works on Chrome

Cannot find "Open by default / Link handling" menu on Moto / Android 15

Device likely enforcing Android 15 link-handling restrictions for unverified domains

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Possible cause:

Android 15 has new link-handling and app-link verification behavior.
Moto Edge 50 may be blocking external intents for unverified domains, so Saber cannot trigger browser login for custom Nextcloud servers.

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Request:

Could Saber provide an option to force external browser login with a non-verified domain?

Or bypass Android 15 link-handling restrictions?

Or log an error when external browser intent fails?

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