web/a11y: Prefers more field contrast

[GirlBossRush]

Details

This PR adds additional support for a user's preferred level of contrast on inputs and fieldsets. The choice of field colors is deferred to the browser, allowing for default colors (with respect to our theme) to take effect.

Screenshots

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.98%. Comparing base (12c2343) to head (a243da8).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17279      +/-   ##
==========================================
+ Coverage   92.69%   92.98%   +0.28%     
==========================================
  Files         869      869              
  Lines       47949    47949              
==========================================
+ Hits        44448    44583     +135     
+ Misses       3501     3366     -135     

Flag	Coverage Δ
e2e	45.25% <ø> (+1.17%)	⬆️
integration	23.18% <ø> (+<0.01%)	⬆️
unit	91.07% <ø> (+<0.01%)	⬆️
unit-migrate	91.12% <ø> (+<0.01%)	⬆️

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authentik PR Installation instructions

Instructions for docker-compose

Add the following block to your .env file:

AUTHENTIK_IMAGE=ghcr.io/goauthentik/dev-server
AUTHENTIK_TAG=gh-a243da8a5dd5e46b073666620ab74bf9bdc0871d
AUTHENTIK_OUTPOSTS__CONTAINER_IMAGE_BASE=ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s

Afterwards, run the upgrade commands from the latest release notes.

Instructions for Kubernetes

Add the following block to your values.yml file:

authentik:
    outposts:
        container_image_base: ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s
global:
    image:
        repository: ghcr.io/goauthentik/dev-server
        tag: gh-a243da8a5dd5e46b073666620ab74bf9bdc0871d

Afterwards, run the upgrade commands from the latest release notes.

[kensternberg-authentik]

MaxWidth is a non-heritable property; this should be initial, not unset.

For a property that is inherited (e.g. color) it means inherit, and for a property that isn’t inherited (e.g. float) it means initial. (inherit, initial, unset, revert).

So this will do what you mean, but it's... unclear why it means that. :-)