feat: complete leave approval MVP

mobile/lib/features/form/application/leave_draft_controller.dart

@@ -1,21 +1,47 @@
+import 'dart:async';
+
 import 'package:aioa_mobile/core/forms/schema/form_schema.dart';
 import 'package:aioa_mobile/core/forms/schema/form_validator.dart';
-import 'package:aioa_mobile/features/form/domain/leave_form_definition.dart';
+import 'package:aioa_mobile/features/form/data/leave_local_draft_repository.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+final leaveLocalDraftRepositoryProvider = Provider<LeaveLocalDraftRepository>(
+  (ref) => LeaveLocalDraftRepository(),
+);
+
 final leaveDraftProvider =
     NotifierProvider<LeaveDraftController, DynamicFormState>(
       LeaveDraftController.new,
     );
 
 class LeaveDraftController extends Notifier<DynamicFormState> {
+  late final LeaveLocalDraftRepository _repository;
+
   @override
-  DynamicFormState build() => const DynamicFormState();
+  DynamicFormState build() {
+    _repository = ref.watch(leaveLocalDraftRepositoryProvider);
+    unawaited(_restore());
+    return const DynamicFormState();
+  }
+
+  Future<void> _restore() async {
+    final restored = await _repository.load();
+    if (restored == null || state.values.isNotEmpty) return;
+    state = DynamicFormState(
+      values: restored.values,
+      restoredAt: restored.savedAt,
+    );
+  }
 
   void setValue(String field, Object? value) {
     final values = {...state.values, field: value};
     final errors = {...state.errors}..remove(field);
-    state = state.copyWith(values: values, errors: errors);
+    state = state.copyWith(
+      values: values,
+      errors: errors,
+      clearRestoredAt: true,
+    );
+    unawaited(_repository.save(values));
   }
 
   void applyAiSuggestion() {
@@ -36,13 +62,22 @@ class LeaveDraftController extends Notifier<DynamicFormState> {
         'reason': '办理个人事务，已提前完成工作交接。',
       },
     );
+    unawaited(_repository.save(state.values));
   }
 
-  bool validate() {
-    final errors = validateDynamicForm(
-      leaveFormDefinition.dataSchema,
-      state.values,
-    );
+  void applySuggestion(Map<String, Object?> suggestion) {
+    final values = {...state.values, ...suggestion};
+    state = DynamicFormState(values: values);
+    unawaited(_repository.save(values));
+  }
+
+  Future<void> clear() async {
+    await _repository.clear();
+    state = const DynamicFormState();
+  }
+
+  bool validate(JsonFormSchema schema) {
+    final errors = validateDynamicForm(schema, state.values);
     final startsAt = DateTime.tryParse(
       state.values['startsAt'] as String? ?? '',
     );