feat(sync): add 'network timeout' preference

[david-allison]

Purpose / Description

Anki Desktop exposes 'Network timeout', we should do so as well.

https://forums.ankiweb.net/t/cant-sync-since-1-1-2026/68040/

Fixes

• Fixes Network Timeout #20000

Approach

Expose it as a IncrementerNumberRangePreferenceCompat:

• @string/sync_io_timeout_secs_key => syncIoTimeoutSecs
• Default: 60s
• Minimum: 30s
• Max: 99999s

How Has This Been Tested?

Set in SyncAuth after being set in the UI to 30

Truncated to avoid my hKey becoming public 😅

UI

⚠️ I had a failure in PrefsSearchBarTest, but I don't believe this is related

• Improve error reporting in PrefsSearchBarTest (#19918) #19922
• Flaky test: PrefsSearchBarTest #19918

Learning (optional, can help others)

Exposed as SyncAuth.io_timeout_secs in the backend

https://github.com/ankitects/anki/blob/8f2144534bff6efedb22b7f052fba13ffe28cbc2/proto/anki/sync.proto#L29-L33

Upstream exposes this as a '60 seconds' textbox with an up/down picker

https://github.com/ankitects/anki/blob/8f2144534bff6efedb22b7f052fba13ffe28cbc2/qt/aqt/profiles.py#L734-L735 https://github.com/ankitects/anki/blob/8f2144534bff6efedb22b7f052fba13ffe28cbc2/qt/aqt/forms/preferences.ui#L718-L742

Checklist

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[github-actions]

Important

Maintainers: This PR contains Strings changes

1. Sync Translations before merging this PR and wait for the action to complete
2. Review and merge the auto-generated PR in order to sync all user-submitted translations
3. Sync Translations again and merge the PR so the huge automated string changes caused by merging this PR are by themselves and easy to review

[BrayanDSO]

I think that a NumberRangePreferenceCompat would be a better fit than SliderPreference

[david-allison]

ChatGPT agreed.

I would like to improve the UI of the control, it's a bit naff:

• Improve UI of IncrementerNumberRangePreferenceCompat #20005

Tested with a new install and with a custom value

[mikehardy]

LGTM - can do an alpha shortly

[peterj71]

I just tested [AnkiDroid-2.24.0alpha2.parallel.A.apk] and the menu option appears fine and the 30s minimum works too (I put 6s and it auto-corrected to 30s).

Meanwhile the network routes from Optus Australia to Europe have improved since 1st Jan so my syncing pretty fast now and doesn't timeout (traceroute has improved from 33.5s and 22.5s).

Thanks again guys and BTW if you need to test this in future note that a partial sync is unlikely to timeout – it was only when I was doing full syncs owing to field changes in my note types that the problem occurred.