a687e3637f
Migrate StateNotifierProvider/StateNotifier → NotifierProvider/Notifier, StateProvider → NotifierProvider with simple notifier, FamilyAsyncNotifier removed in Riverpod 3 (replaced with constructor-arg pattern), and rename .valueOrNull → .value throughout all providers and screens. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>