[Feature] Open album links in emails through my.immich.app so the mobile app opens them

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature The feature Links in album invite/update emails use the External Domain (e.g. On a phone these open in the browser, even when the Immich app is installed, because Android/iOS app links are only registered for my.immich.app. my.immich.app already supports ?instanceUrl= to point at a self-hosted instance. Proposal An admin setting, off by default, e.g. server.emailLinksViaMyImmich ("Open album links from emails in the Immich app"). When it is on and an External Domain is set, album links in emails (thumbnail, "View Album" button, fallback link) become: Reasons for the opt-in: • It routes the click through a third-party host (my.immich.app), which some admins won't want. It also needs External Domain to be set. • With the setting off, behaviour is unchanged. The switch is disabled in the …