Ajout des notification + page employé (#6)

| Numéro du ticket | Titre du ticket |
|------------------|-----------------|
|                  |                 |

## Description de la PR

## Modification du .env

## Check list

- [ ] Pas de régression
- [ ] TU/TI/TF rédigée
- [ ] TU/TI/TF OK
- [ ] CHANGELOG modifié

Reviewed-on: #6
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

frontend/utils/date.ts

@@ -6,6 +6,17 @@ export const toYmd = (year: number, month: number, day: number) => {
 
 export const normalizeDate = (value: string) => value.slice(0, 10)
 
+export const formatYmdToFr = (value: string) => {
+  const [year, month, day] = value.split('-')
+  if (!year || !month || !day) return value
+  return `${day}/${month}/${year}`
+}
+
+export const formatNullableYmdToFr = (value?: string | null, fallback = 'En cours') => {
+  if (!value) return fallback
+  return formatYmdToFr(value)
+}
+
 export const parseYmd = (value: string) => {
   const [year, month, day] = value.split('-').map(Number)
   if (!year || !month || !day) return null