IA-955 : feat: Improve MatiereDialog with error feedback, niveauId guard, and ApprentissageView code cleanup (!186) · Requêtes de fusion · marketing confort / brainboost / brainboost-front

khadija.elbachouri a demandé de fusionner feature/IA-955 vers develop avr. 14, 2026

Summary

Improves the MatiereDialog with proper error/warning feedback and niveauId validation, and cleans up handler functions in ApprentissageView.

Added submitError state with inline <Alert severity="error"> displayed inside the dialog instead of silently failing
Added niveauId validation guard: shows a <Alert severity="warning"> banner when no niveau is selected, and blocks submission with a user-facing error message
Replaced onClose() calls with a handleClose() wrapper that resets submitError on dismiss
Error message is now contextual: different wording for add vs edit mode

Fixed navigateToMatieres to use niveau.uuid instead of niveau.levelUuid for setting currentNiveauId
Cleaned up handleDeleteNiveauRows, handleDeleteMatiereRows, handleDeleteChapitreRows, handleDeleteExerciceRows: removed redundant comments, simplified to direct await + refetch pattern
Cleaned up handleToggleMatiereActive, handleToggleChapitreActive, handleToggleActiveExercice: removed verbose comments and tightened handler bodies