perf: optimization des rebuilds (ValueNotifier pour calendrier/container_form, Selector pour pages de gestion et mon compte)

em2rp/lib/views/my_account_page.dart

@@ -17,10 +17,9 @@ class MyAccountPage extends StatelessWidget {
         title: 'Mon compte',
       ),
       drawer: const MainDrawer(currentPage: '/my_account'),
-      body: Consumer<LocalUserProvider>(
-        builder: (context, userProvider, child) {
-          final user = userProvider.currentUser;
-
+      body: Selector<LocalUserProvider, UserModel?>(
+        selector: (context, provider) => provider.currentUser,
+        builder: (context, user, child) {
           if (user == null) {
             return const Center(child: CircularProgressIndicator());
           }
@@ -73,7 +72,7 @@ class MyAccountPage extends StatelessWidget {
                               const SizedBox(height: 20),
                               ElevatedButton(
                                 onPressed: () {
-                                  userProvider.updateUserData(
+                                  context.read<LocalUserProvider>().updateUserData(
                                     firstName: firstNameController.text,
                                     lastName: lastNameController.text,
                                     phoneNumber: phoneController.text,