authentification keyloack + début front

front_end/src/context/useLocalData.tsx

@@ -0,0 +1,10 @@
+import { useContext } from 'react'
+import { LocalDataContext } from './LocalDataContext2'
+
+export const useLocalData = () => {
+  const context = useContext(LocalDataContext)
+  if (!context) {
+    throw new Error('useLocalData must be used within LocalDataProvider')
+  }
+  return context
+}