[Feature] One-click mobile app configuration file to simplify onboarding

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Onboarding new users to the Immich mobile app can be pretty complicated, especially for non-technical users. In my setup, users have to: • Open the app • Go into settings • Configure proxy headers (I have a reverse proxy with auth in front) • Enter the Immich server URL • Then log in credentials It is honestly too much for older users like my parents or grandparents. Explaining proxy headers over the phone is… not fun 😅 It would be awesome if Immich supported something like a one-click configuration file, for example: • A file like (or a special link) • Shared via a secure messaging app • When opened, it launches the Immich app and auto-configures things like: - Server URL - Proxy headers - Other required connection settings - maybe even login credentials? My parent…