feat(auth): useAuth + ProtectedRoute + signUp dans auth-client (Sprint 1 étape 2)

src/shared/lib/auth-client.ts

@@ -1,4 +1,4 @@
-import { createClient } from '@supabase/supabase-js'
+import { createClient, type Session, type User } from '@supabase/supabase-js'
 import { env } from '@/shared/config/env'
 import { logger } from './logger'
 
@@ -17,6 +17,32 @@ export async function signIn(email: string, password: string) {
   return supabase.auth.signInWithPassword({ email, password })
 }
 
+export async function signUp(email: string, password: string) {
+  return supabase.auth.signUp({ email, password })
+}
+
 export async function signOut() {
   return supabase.auth.signOut()
 }
+
+export async function getCurrentSession(): Promise<Session | null> {
+  const { data, error } = await supabase.auth.getSession()
+  if (error) {
+    logger.error('Auth session fetch failed', { name: error.name })
+    return null
+  }
+  return data.session
+}
+
+/**
+ * S'abonne aux changements d'état d'authentification Supabase.
+ * Retourne une fonction de désabonnement à appeler au cleanup.
+ */
+export function subscribeToAuthChanges(callback: (session: Session | null) => void): () => void {
+  const { data } = supabase.auth.onAuthStateChange((_event, session) => {
+    callback(session)
+  })
+  return () => data.subscription.unsubscribe()
+}
+
+export type { Session, User }