Have a way to force-update adblock lists

[ShivanKaul]

We don't currently have a way on iOS to force-update all components like we do on Desktop and Android, where a user can go to brave://components in the omnibox and manually press Update for components.

This is extremely important for when we need to ship an emergency component update out, like we do when there's widespread adblock list-related breakage. On iOS, AFAICT, there's nothing a user can do to make sure they have the latest version of an adblock list.

We don't need to have the update be per-component; a single button suffice somewhere in the app would suffice. For debugging purposes, it would also be nice to know the user's current version, but that's secondary in priority.

[kylehickinson]

Adblock on iOS is controlled by component updater as well, so a possible solution here would be to expose a way to access brave://components on iOS as well

[ShivanKaul]

We should look at the Android implementation of this, at least for the placement of the Update button: https://github.com/brave/brave-browser/issues/35270. It would be best if this button lived in the Content Filtering settings page.

[Uni-verse]

Verified on iPhone 12 running iOS 18.0 using version 1.70.117

Case: New Users

• Ensured that Update Lists button is shown for Default Filter Lists and External Filter Lists.
• Ensured that Update Lists button is only shown for External Filters Lists when URLs are added and not shown when URLs are removed again.
• Ensured that button is replaced with Lists Updated message when tapping on the update button.
• Ensured that button state is reset to default state (showing Update Lists) when re-entering the settings page.
• Ensured that custom filters can be added and are applied on webpages.

example	example	example	example	example	example

Case: Existing Users

• Ensured that filter lists, external filters lists and custom filters are retained when upgrading from 1.69.169 -> 1.70.117.
• Ensured that disabling Block 'Switch to App' Notices in settings and then upgrading will retain the switch state in Content Filtering and Settings page.
• Ensured that Update Lists button works after upgrading for existing users and updated message is shown.

example	example	example	example

[Uni-verse]

Verified on iPad (7th Gen) running iOS 17.6 using version 1.70.117

Case: New Users

• Ensured that Update Lists button is shown for Default Filter Lists and External Filter Lists.
• Ensured that Update Lists button is only shown for External Filters Lists when URLs are added and not shown when URLs are removed again.
• Ensured that button is replaced with Lists Updated message when tapping on the update button.
• Ensured that button state is reset to default state (showing Update Lists) when re-entering the settings page.
• Ensured that custom filters can be added and are applied on webpages.

example	example	example	example

Case: Existing Users

• Ensured that filter lists, external filters lists and custom filters are retained when upgrading from 1.69.169 -> 1.70.117.
• Ensured that disabling Block 'Switch to App' Notices in settings and then upgrading will retain the switch state in Content Filtering and Settings page.
• Ensured that Update Lists button works after upgrading for existing users and updated message is shown.

example	example	example