ETQ tech, j'aime pas la duplication du code qui gère les erreurs

[mfo]

un peu de cleanup de code / homogénéisation de l'affichage des erreus. ETQ admin, si je flingue une condition qui s'applique a plein de champ, j'ai pas un pavé d'erreur sur ma page.

(la capture d'ecran affiche un prob d'i18n, c'est plus le cas sur le commit)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 62.21%. Comparing base (5ef29a2) to head (6185aa4). Report is 4 commits behind head on main.

:exclamation: Current head 6185aa4 differs from pull request most recent head eb2449e

Please upload reports for the commit eb2449e to get more accurate results.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #10494 +/- ## =========================================== - Coverage 80.89% 62.21% -18.68% =========================================== Files 1211 1212 +1 Lines 25612 27192 +1580 Branches 4623 4156 -467 =========================================== - Hits 20719 16918 -3801 - Misses 4893 10274 +5381 ```

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