feat: wire + (add tx dialog) and search (filter lists)

lib/app.dart

@@ -5,6 +5,8 @@ import 'screens/dashboard_screen.dart';
 import 'screens/budget_screen.dart';
 import 'screens/accounts_screen.dart';
 import 'screens/transactions_screen.dart';
+import 'providers/db_provider.dart';
+import 'data/db.dart';
 
 final _selectedIndexProvider = StateProvider<int>((ref) => 0);
 
@@ -18,6 +20,8 @@ class YnabApp extends ConsumerStatefulWidget {
 class _YnabAppState extends ConsumerState<YnabApp> {
   late final List<Widget> _screens;
   late final List<_NavItem> _navItems;
+  final _searchController = TextEditingController();
+  bool _searchActive = false;
 
   @override
   void initState() {
@@ -36,6 +40,96 @@ class _YnabAppState extends ConsumerState<YnabApp> {
     ];
   }
 
+  @override
+  void dispose() {
+    _searchController.dispose();
+    super.dispose();
+  }
+
+  Future<void> _addTransaction() async {
+    final accounts = ref.read(openAccountsProvider);
+    final db = ref.read(dbProvider);
+    if (accounts.isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('Créez d\'abord un compte')),
+      );
+      return;
+    }
+
+    final payeeCtrl = TextEditingController();
+    final amountCtrl = TextEditingController();
+    int? accountId = accounts.first.id;
+    DateTime date = DateTime.now();
+
+    await showDialog(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        title: const Text('Nouvelle transaction'),
+        content: SingleChildScrollView(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              TextField(
+                controller: payeeCtrl,
+                decoration: const InputDecoration(labelText: 'Bénéficiaire', hintText: 'Ex: Supermarché'),
+                autofocus: true,
+              ),
+              const SizedBox(height: 12),
+              TextField(
+                controller: amountCtrl,
+                decoration: const InputDecoration(labelText: 'Montant', hintText: '0,00'),
+                keyboardType: const TextInputType.numberWithOptions(decimal: true),
+              ),
+              const SizedBox(height: 12),
+              DropdownButtonFormField<int>(
+                value: accountId,
+                decoration: const InputDecoration(labelText: 'Compte'),
+                items: accounts
+                    .map((a) => DropdownMenuItem(value: a.id, child: Text(a.name)))
+                    .toList(),
+                onChanged: (v) => accountId = v,
+              ),
+            ],
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(ctx),
+            child: const Text('Annuler'),
+          ),
+          FilledButton(
+            onPressed: () async {
+              final payee = payeeCtrl.text.trim();
+              final amountStr = amountCtrl.text.trim().replaceAll(',', '.');
+              final amount = double.tryParse(amountStr);
+              if (payee.isEmpty || amount == null || accountId == null) return;
+              await db.into(db.transactions).insert(TransactionsCompanion.insert(
+                accountId: accountId!,
+                payee: payee,
+                amount: amount,
+                date: date,
+              ));
+              if (ctx.mounted) Navigator.pop(ctx);
+            },
+            child: const Text('Ajouter'),
+          ),
+        ],
+      ),
+    );
+    payeeCtrl.dispose();
+    amountCtrl.dispose();
+  }
+
+  void _toggleSearch() {
+    setState(() {
+      _searchActive = !_searchActive;
+      if (!_searchActive) {
+        _searchController.clear();
+        ref.read(searchQueryProvider.notifier).state = '';
+      }
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     final selectedIndex = ref.watch(_selectedIndexProvider);
@@ -46,6 +140,11 @@ class _YnabAppState extends ConsumerState<YnabApp> {
       bottomNavigationBar: NavigationBar(
         selectedIndex: selectedIndex,
         onDestinationSelected: (int index) {
+          setState(() {
+            _searchActive = false;
+            _searchController.clear();
+            ref.read(searchQueryProvider.notifier).state = '';
+          });
           ref.read(_selectedIndexProvider.notifier).state = index;
         },
         destinations: _navItems.map((item) {
@@ -70,25 +169,47 @@ class _YnabAppState extends ConsumerState<YnabApp> {
               ),
               child: Row(
                 children: [
-                  Text(
-                    _navItems[selectedIndex].label,
-                    style: TextStyle(
-                      color: colorScheme.onSurface,
-                      fontSize: 18,
-                      fontWeight: FontWeight.w600,
+                  if (_searchActive)
+                    Expanded(
+                      child: TextField(
+                        controller: _searchController,
+                        autofocus: true,
+                        decoration: const InputDecoration(
+                          hintText: 'Rechercher…',
+                          border: InputBorder.none,
+                          isDense: true,
+                        ),
+                        onChanged: (v) => ref.read(searchQueryProvider.notifier).state = v,
+                      ),
+                    )
+                  else
+                    Text(
+                      _navItems[selectedIndex].label,
+                      style: TextStyle(
+                        color: colorScheme.onSurface,
+                        fontSize: 18,
+                        fontWeight: FontWeight.w600,
+                      ),
                     ),
-                  ),
                   const Spacer(),
-                  IconButton(
-                    icon: Icon(Icons.add, color: colorScheme.primary),
-                    onPressed: () {},
-                    tooltip: 'Ajouter une transaction',
-                  ),
-                  IconButton(
-                    icon: Icon(Icons.search, color: colorScheme.onSurfaceVariant),
-                    onPressed: () {},
-                    tooltip: 'Rechercher',
-                  ),
+                  if (_searchActive)
+                    IconButton(
+                      icon: const Icon(Icons.close),
+                      onPressed: _toggleSearch,
+                      tooltip: 'Fermer la recherche',
+                    )
+                  else ...[
+                    IconButton(
+                      icon: Icon(Icons.add, color: colorScheme.primary),
+                      onPressed: _addTransaction,
+                      tooltip: 'Ajouter une transaction',
+                    ),
+                    IconButton(
+                      icon: Icon(Icons.search, color: colorScheme.onSurfaceVariant),
+                      onPressed: _toggleSearch,
+                      tooltip: 'Rechercher',
+                    ),
+                  ],
                 ],
               ),
             ),

lib/providers/db_provider.dart

@@ -11,6 +11,8 @@ final dbProvider = Provider<AppDatabase>((ref) {
   return db;
 });
 
+final searchQueryProvider = StateProvider<String>((ref) => '');
+
 // ── Accounts ────────────────────────────────────────────────────────────
 final accountsProvider = StreamProvider<List<Account>>((ref) {
   final db = ref.watch(dbProvider);

lib/screens/accounts_screen.dart

@@ -8,7 +8,11 @@ class AccountsScreen extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    final accounts = ref.watch(openAccountsProvider);
+    final all = ref.watch(openAccountsProvider);
+    final query = ref.watch(searchQueryProvider).toLowerCase();
+    final accounts = query.isEmpty
+        ? all
+        : all.where((a) => a.name.toLowerCase().contains(query)).toList();
 
     return ListView(
       padding: const EdgeInsets.fromLTRB(16, 8, 16, 90),

lib/screens/transactions_screen.dart

@@ -10,12 +10,14 @@ class TransactionsScreen extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final all = ref.watch(allTransactionsProvider).valueOrNull ?? [];
+    final query = ref.watch(searchQueryProvider).toLowerCase();
+    final filtered = query.isEmpty ? all : all.where((t) => t.payee.toLowerCase().contains(query)).toList();
 
     return ListView.builder(
       padding: const EdgeInsets.fromLTRB(16, 8, 16, 90),
-      itemCount: all.length,
+      itemCount: filtered.length,
       itemBuilder: (context, index) {
-        final t = all[index];
+        final t = filtered[index];
         return Card(
           margin: const EdgeInsets.only(bottom: 4),
           child: ListTile(