feat(#14): finalisation redirection et nettoyage

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/lib/screens/administrateurs/admin_dashboardScreen.dart

@@ -15,13 +15,8 @@ class AdminDashboardScreen extends StatefulWidget {
 }
 
 class _AdminDashboardScreenState extends State<AdminDashboardScreen> {
-  /// null = chargement du statut setup, true/false = connu
   bool? _setupCompleted;
-
-  /// 0 = Gestion des utilisateurs, 1 = Paramètres
   int mainTabIndex = 0;
-
-  /// Sous-onglet quand mainTabIndex == 0 : 0=Gestionnaires, 1=Parents, 2=AM, 3=Administrateurs
   int subIndex = 0;
 
   @override
@@ -38,8 +33,11 @@ class _AdminDashboardScreenState extends State<AdminDashboardScreen> {
         _setupCompleted = completed;
         if (!completed) mainTabIndex = 1;
       });
-    } catch (_) {
+    } catch (e) {
-      if (mounted) setState(() => _setupCompleted = true);
+      if (mounted) setState(() {
+        _setupCompleted = false;
+        mainTabIndex = 1;
+      });
     }
   }
 
@@ -96,9 +94,7 @@ class _AdminDashboardScreenState extends State<AdminDashboardScreen> {
 
   Widget _getBody() {
     if (mainTabIndex == 1) {
-      return ParametresPanel(
+      return ParametresPanel(redirectToLoginAfterSave: !_setupCompleted!);
-        onSetupCompleted: () => setState(() => _setupCompleted = true),
-      );
     }
     switch (subIndex) {
       case 0:

frontend/lib/services/configuration_service.dart

@@ -55,6 +55,12 @@ class ConfigurationService {
         : Map<String, String>.from(ApiConfig.headers);
   }
 
+  static String? _toStr(dynamic v) {
+    if (v == null) return null;
+    if (v is String) return v;
+    return v.toString();
+  }
+
   /// GET /api/v1/configuration/setup/status
   static Future<bool> getSetupStatus() async {
     final response = await http.get(
@@ -63,7 +69,11 @@ class ConfigurationService {
     );
     if (response.statusCode != 200) return true;
     final data = jsonDecode(response.body);
-    return data['data']?['setupCompleted'] as bool? ?? true;
+    final val = data['data']?['setupCompleted'];
+    if (val is bool) return val;
+    if (val is String) return val.toLowerCase() == 'true' || val == '1';
+    if (val is int) return val == 1;
+    return true; // Par défaut on considère configuré pour ne pas bloquer
   }
 
   /// GET /api/v1/configuration (toutes les configs)
@@ -73,9 +83,8 @@ class ConfigurationService {
       headers: await _headers(),
     );
     if (response.statusCode != 200) {
-      throw Exception(
+      final err = jsonDecode(response.body) as Map<String, dynamic>?;
-        (jsonDecode(response.body) as Map)['message'] ?? 'Erreur chargement configuration',
+      throw Exception(_toStr(err?['message']) ?? 'Erreur chargement configuration');
-      );
     }
     final data = jsonDecode(response.body);
     final list = data['data'] as List<dynamic>? ?? [];
@@ -89,9 +98,8 @@ class ConfigurationService {
       headers: await _headers(),
     );
     if (response.statusCode != 200) {
-      throw Exception(
+      final err = jsonDecode(response.body) as Map<String, dynamic>?;
-        (jsonDecode(response.body) as Map)['message'] ?? 'Erreur chargement configuration',
+      throw Exception(_toStr(err?['message']) ?? 'Erreur chargement configuration');
-      );
     }
     final data = jsonDecode(response.body);
     final map = data['data'] as Map<String, dynamic>? ?? {};
@@ -105,9 +113,9 @@ class ConfigurationService {
       headers: await _headers(),
       body: jsonEncode(body),
     );
-    if (response.statusCode != 200) {
+    if (response.statusCode != 200 && response.statusCode != 201) {
       final err = jsonDecode(response.body) as Map<String, dynamic>?;
-      final msg = err != null ? (err['message'] as String? ?? err['error'] as String?) : null;
+      final msg = err != null ? (_toStr(err['error']) ?? _toStr(err['message'])) : null;
       throw Exception(msg ?? 'Erreur lors de la sauvegarde');
     }
   }
@@ -120,10 +128,10 @@ class ConfigurationService {
       body: jsonEncode({'testEmail': testEmail}),
     );
     final data = jsonDecode(response.body) as Map<String, dynamic>?;
-    if (response.statusCode == 200 && (data?['success'] == true)) {
+    if ((response.statusCode == 200 || response.statusCode == 201) && (data?['success'] == true)) {
-      return data!['message'] as String? ?? 'Test SMTP réussi.';
+      return _toStr(data?['message']) ?? 'Test SMTP réussi.';
     }
-    final msg = data != null ? (data['error'] as String? ?? data['message'] as String?) : null;
+    final msg = data != null ? (_toStr(data['error']) ?? _toStr(data['message'])) : null;
     throw Exception(msg ?? 'Échec du test SMTP');
   }
 
@@ -133,9 +141,9 @@ class ConfigurationService {
       Uri.parse('${ApiConfig.baseUrl}${ApiConfig.configurationSetupComplete}'),
       headers: await _headers(),
     );
-    if (response.statusCode != 200) {
+    if (response.statusCode != 200 && response.statusCode != 201) {
       final err = jsonDecode(response.body) as Map<String, dynamic>?;
-      final msg = err != null ? (err['message'] as String? ?? err['error'] as String?) : null;
+      final msg = err != null ? (_toStr(err['error']) ?? _toStr(err['message'])) : null;
       throw Exception(msg ?? 'Erreur finalisation configuration');
     }
   }

frontend/lib/widgets/admin/parametres_panel.dart

@@ -1,12 +1,13 @@
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import 'package:p_tits_pas/services/configuration_service.dart';
 
-/// Panneau Paramètres / Configuration (ticket #15) : 3 sections sur une page.
+/// Panneau Paramètres admin : Email (SMTP), Personnalisation, Avancé.
 class ParametresPanel extends StatefulWidget {
-  /// Appelé après une sauvegarde réussie (pour débloquer le reste du dashboard si config initiale).
+  /// Si true, après sauvegarde on redirige vers le login (première config). Sinon on reste sur la page.
-  final VoidCallback? onSetupCompleted;
+  final bool redirectToLoginAfterSave;
 
-  const ParametresPanel({super.key, this.onSetupCompleted});
+  const ParametresPanel({super.key, this.redirectToLoginAfterSave = false});
 
   @override
   State<ParametresPanel> createState() => _ParametresPanelState();
@@ -107,13 +108,14 @@ class _ParametresPanelState extends State<ParametresPanel> {
     return payload;
   }
 
-  /// Enregistre en base sans marquer la config initiale comme terminée (utilisé avant test SMTP).
+  /// Sauvegarde en base sans completeSetup (utilisé avant test SMTP).
   Future<void> _saveBulkOnly() async {
     await ConfigurationService.updateBulk(_buildPayload());
   }
 
-  /// Sauvegarde + marque la config initiale comme terminée + débloque les panneaux.
+  /// Sauvegarde la config, marque le setup comme terminé. Si première config, redirige vers le login.
   Future<void> _save() async {
+    final redirectAfter = widget.redirectToLoginAfterSave;
     setState(() {
       _message = null;
       _isSaving = true;
@@ -123,11 +125,14 @@ class _ParametresPanelState extends State<ParametresPanel> {
       if (!mounted) return;
       await ConfigurationService.completeSetup();
       if (!mounted) return;
-      widget.onSetupCompleted?.call();
       setState(() {
         _isSaving = false;
         _message = 'Configuration enregistrée.';
       });
+      if (!mounted) return;
+      if (redirectAfter) {
+        GoRouter.of(context).go('/login');
+      }
     } catch (e) {
       if (mounted) {
         setState(() {