Updated web/src/i18n/locales/fr.json to improve French translations for the user interface.
Removed verbose prefixes like 'Gestion des...' and 'Paramètres de...' to prevent truncation in sidebars and menus.
Harmonized terms for consistency (e.g., 'Tâches', 'Journaux', 'Dessins').
Renamed 'Place du marché' to 'Marché des modèles'.