Improved json auto save & budget mobile UI

lib/domains/account/account_bloc.dart

@@ -55,6 +55,7 @@ class AccountBloc extends Bloc<AccountEvent, AccountState> {
     on<AccountEditLabel>(_onAccountEditLabel);
     on<AccountEditSaving>(_onAccountEditSaving);
     on<AccountEditColor>(_onAccountEditColor);
+    on<ClearData>(_onClearData);
 
     _metadataRepository
       .getAccountsStream()
@@ -209,4 +210,9 @@ class AccountBloc extends Bloc<AccountEvent, AccountState> {
     _metadataRepository.saveAccounts(accounts);
     return accounts;
   }
+
+  FutureOr<void> _onClearData(ClearData event, Emitter<AccountState> emit) {
+    _metadataRepository.deleteMetadata();
+    _transactionsRepository.deleteTransactions();
+  }
 }

lib/domains/account/account_event.dart

@@ -7,6 +7,10 @@ sealed class AccountEvent extends Equatable {
   List<Object> get props => [];
 }
 
+final class ClearData extends AccountEvent {
+  const ClearData();
+}
+
 final class AccountImportCSV extends AccountEvent {
   const AccountImportCSV();
 }

lib/domains/budget/budget_bloc.dart

@@ -226,10 +226,14 @@ class BudgetBloc extends Bloc<BudgetEvent, BudgetState> {
 
   BudgetState _computeState(List<Budget> budgets, double? initialBudget) {
     final compareResult = _computeCompareBudget(state.budgets, state.compareYear, state.compareMonth);
+    
+    final budgetValues = budgets.map((budget) => budget.value);
+    final budgetReducedValues = budgetValues.isEmpty ? 0 : budgetValues.reduce((value, element) => value + element);
+
     return state.copyWith(
       budgets: budgets,
       initialBudget: (initialBudget ?? state.initialBudget),
-      remainingBudget: (initialBudget ?? state.initialBudget) - budgets.map((budget) => budget.value).reduce((value, element) => value + element),
+      remainingBudget: (initialBudget ?? state.initialBudget) - budgetReducedValues,
       compareBudgets: compareResult.$1,
       otherBudgets: compareResult.$2,
     );

lib/domains/settings/settings_bloc.dart

@@ -0,0 +1,36 @@
+import 'dart:async';
+
+import 'package:equatable/equatable.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:tunas/repositories/metadata/metadata_repository.dart';
+import 'package:tunas/repositories/metadata/models/settings.dart';
+
+part 'settings_event.dart';
+part 'settings_state.dart';
+
+class SettingsBloc extends Bloc<SettingsEvent, SettingsState> {
+  final MetadataRepository _metadataRepository;
+
+  SettingsBloc({required MetadataRepository metadataRepository}) : _metadataRepository = metadataRepository, super(const SettingsState()) {
+    on<SettingsLoad>(_onSettingsLoad);
+    on<SetThemeMode>(_onSetThemeMode);
+
+    _metadataRepository
+      .getSettingsStream()
+      .listen((settings) => add(SettingsLoad(settings)));
+  }
+
+  FutureOr<void> _onSettingsLoad(SettingsLoad event, Emitter<SettingsState> emit) {
+    emit(state.copyWith(
+      themeMode: event.settings.themeMode,
+    ));
+  }
+
+  FutureOr<void> _onSetThemeMode(SetThemeMode event, Emitter<SettingsState> emit) {
+    _metadataRepository.saveSettings(Settings(themeMode: event.themeMode));
+    emit(state.copyWith(
+      themeMode: event.themeMode,
+    ));
+  }
+}

lib/domains/settings/settings_event.dart

@@ -0,0 +1,20 @@
+part of 'settings_bloc.dart';
+
+sealed class SettingsEvent extends Equatable {
+  const SettingsEvent();
+
+  @override
+  List<Object> get props => [];
+}
+
+final class SettingsLoad extends SettingsEvent {
+  final Settings settings;
+
+  const SettingsLoad(this.settings);
+}
+
+final class SetThemeMode extends SettingsEvent {
+  final ThemeMode themeMode;
+
+  const SetThemeMode(this.themeMode);
+}

lib/domains/settings/settings_state.dart

@@ -0,0 +1,17 @@
+part of 'settings_bloc.dart';
+
+class SettingsState {
+  final ThemeMode themeMode;
+
+  const SettingsState({
+    this.themeMode = ThemeMode.system,
+  });
+
+  SettingsState copyWith({
+    ThemeMode? themeMode,
+  }) {
+    return SettingsState(
+      themeMode: themeMode ?? this.themeMode,
+    );
+  }
+}