web/admin: fix missing preview banner for object attributes (cherry-pick #24982 to version-2026.8)

[authentik-cherry-pick]

Cherry-pick of #24982 to version-2026.8 branch.

Original PR: #24982
Original Author: @BeryJu
Cherry-picked commit: fa9d78a

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[netlify]

✅ Deploy Preview for authentik-docs ready!

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.47%. Comparing base (f329717) to head (0f2e9a8).
⚠️ Report is 2 commits behind head on version-2026.8.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@               Coverage Diff               @@
##           version-2026.8   #24990   +/-   ##
===============================================
  Coverage           91.46%   91.47%           
===============================================
  Files                1149     1149           
  Lines               72307    72307           
  Branches             3875     3875           
===============================================
+ Hits                66139    66140    +1     
+ Misses               6133     6132    -1     
  Partials               35       35           

Flag	Coverage Δ
conformance	34.81% <ø> (+<0.01%)	⬆️
e2e	39.49% <ø> (+<0.01%)	⬆️
integration	31.36% <ø> (+<0.01%)	⬆️
rust	38.89% <ø> (ø)
unit	93.12% <ø> (+<0.01%)	⬆️
unit-migrate	93.14% <ø> (+<0.01%)	⬆️

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[github-actions]

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-0f2e9a853d3d4f6c46749b950c710dc0a966622f
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-0f2e9a853d3d4f6c46749b950c710dc0a966622f

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