budget screen: dynamic month display, editable budget amounts (tap to set)

lib/screens/budget_screen.dart

@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../providers/db_provider.dart';
 import '../theme/app_theme.dart';
+import 'package:drift/drift.dart' show Value;
+import '../data/db.dart';
 
 class BudgetScreen extends ConsumerWidget {
   const BudgetScreen({super.key});
@@ -10,6 +12,9 @@ class BudgetScreen extends ConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final groups = ref.watch(categoryGroupsProvider).valueOrNull ?? [];
     final catsByGroup = ref.watch(categoriesByGroupProvider);
+    final now = DateTime.now();
+    final months = ['', 'Janvier', 'Février', 'Mars', 'Avril', 'Mai', 'Juin', 'Juillet', 'Août', 'Septembre', 'Octobre', 'Novembre', 'Décembre'];
+    final monthLabel = '${months[now.month]} ${now.year}';
 
     return ListView(
       padding: const EdgeInsets.fromLTRB(16, 8, 16, 90),
@@ -22,7 +27,7 @@ class BudgetScreen extends ConsumerWidget {
               children: [
                 Text('Budget du mois', style: Theme.of(context).textTheme.titleMedium),
                 const SizedBox(height: 4),
-                Text('Juillet 2026', style: Theme.of(context).textTheme.bodySmall),
+                Text(monthLabel, style: Theme.of(context).textTheme.bodySmall),
               ],
             ),
           ),
@@ -106,6 +111,51 @@ class _CategoryRow extends ConsumerWidget {
     final remaining = ref.watch(categoryRemainingProvider(categoryId));
     final pct = budgeted > 0 ? ((budgeted + spent) / budgeted).clamp(0.0, 1.0) : 0.0;
 
+    void _editBudget() async {
+      final month = ref.read(currentMonthProvider);
+      final db = ref.read(dbProvider);
+      final ctrl = TextEditingController(text: budgeted > 0 ? budgeted.toStringAsFixed(2) : '');
+
+      final newAmount = await showDialog<double>(
+        context: context,
+        builder: (ctx) => AlertDialog(
+          title: Text('Budget : ${category.name}'),
+          content: TextField(
+            controller: ctrl,
+            decoration: const InputDecoration(labelText: 'Montant', hintText: '0,00'),
+            keyboardType: const TextInputType.numberWithOptions(decimal: true),
+            autofocus: true,
+          ),
+          actions: [
+            TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Annuler')),
+            FilledButton(
+              onPressed: () {
+                final v = double.tryParse(ctrl.text.trim().replaceAll(',', '.'));
+                if (v != null) Navigator.pop(ctx, v);
+              },
+              child: const Text('Enregistrer'),
+            ),
+          ],
+        ),
+      );
+      ctrl.dispose();
+
+      if (newAmount == null) return;
+      final existing = await (db.select(db.budgets)
+        ..where((b) => b.categoryId.equals(categoryId))
+        ..where((b) => b.month.equals(month)))
+        .get();
+      if (existing.isNotEmpty) {
+        await db.update(db.budgets).replace(existing.first.copyWith(budgeted: newAmount));
+      } else {
+        await db.into(db.budgets).insert(BudgetsCompanion.insert(
+          categoryId: categoryId,
+          month: month,
+          budgeted: Value(newAmount),
+        ));
+      }
+    }
+
     return Padding(
       padding: const EdgeInsets.only(left: 8, bottom: 4),
       child: Card(
@@ -144,8 +194,14 @@ class _CategoryRow extends ConsumerWidget {
               const SizedBox(height: 2),
               Row(
                 children: [
-                  Text('Budget: ${formatCurrency(budgeted)}',
+                  GestureDetector(
-                      style: Theme.of(context).textTheme.bodySmall),
+                    onTap: _editBudget,
+                    child: Text('Budget: ${formatCurrency(budgeted)}',
+                        style: Theme.of(context).textTheme.bodySmall?.copyWith(
+                              decoration: TextDecoration.underline,
+                              color: Theme.of(context).colorScheme.primary,
+                            )),
+                  ),
                   const SizedBox(width: 12),
                   Text('Dépensé: ${formatCurrency(spent.abs())}',
                       style: Theme.of(context).textTheme.bodySmall),