feat: section preprod (env prod/preprod) + intégration ANTS (prod+preprod, jeu web)

- servers groupés par environnement (Production / Preprod) avec en-têtes
- ANTS prod (ants-web) + preprod (ants-web-rd) intégrés : jeu web, bouton Ouvrir
- The Cycle preprod (the-cycle-api-rd) ajouté
- badge PREPROD sur les cartes concernées, thème ANTS (fourmi/ambre)
- supprime le widget_test.dart par défaut (cassé, non compilé dans l'APK)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/widgets/server_card.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 import '../models.dart';
 
@@ -41,13 +42,23 @@ class ServerCard extends StatelessWidget {
                   child: Column(
                     crossAxisAlignment: CrossAxisAlignment.start,
                     children: [
-                      Text(server.name,
-                          style: const TextStyle(
-                              color: Colors.white,
-                              fontSize: 19,
-                              fontWeight: FontWeight.w800),
-                          maxLines: 1,
-                          overflow: TextOverflow.ellipsis),
+                      Row(
+                        children: [
+                          Flexible(
+                            child: Text(server.name,
+                                style: const TextStyle(
+                                    color: Colors.white,
+                                    fontSize: 19,
+                                    fontWeight: FontWeight.w800),
+                                maxLines: 1,
+                                overflow: TextOverflow.ellipsis),
+                          ),
+                          if (server.isPreprod) ...[
+                            const SizedBox(width: 8),
+                            const _Tag(label: 'PREPROD'),
+                          ],
+                        ],
+                      ),
                       if (server.subtitle != null)
                         Text(server.subtitle!,
                             style: TextStyle(
@@ -80,6 +91,10 @@ class ServerCard extends StatelessWidget {
                   )
                 else
                   const Spacer(),
+                if (server.web && server.openUrl != null) ...[
+                  _OpenButton(url: server.openUrl!),
+                  const SizedBox(width: 8),
+                ],
                 _ToggleButton(up: server.isUp, busy: busy, onToggle: onToggle),
               ],
             ),
@@ -118,6 +133,44 @@ class _Icon extends StatelessWidget {
       );
 }
 
+class _Tag extends StatelessWidget {
+  const _Tag({required this.label});
+  final String label;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 2),
+      decoration: BoxDecoration(
+        color: Colors.black.withOpacity(0.28),
+        borderRadius: BorderRadius.circular(6),
+        border: Border.all(color: Colors.white.withOpacity(0.5), width: 1),
+      ),
+      child: Text(label,
+          style: const TextStyle(
+              color: Colors.white, fontSize: 10, fontWeight: FontWeight.w800, letterSpacing: 0.6)),
+    );
+  }
+}
+
+class _OpenButton extends StatelessWidget {
+  const _OpenButton({required this.url});
+  final String url;
+
+  @override
+  Widget build(BuildContext context) {
+    return OutlinedButton.icon(
+      onPressed: () => launchUrl(Uri.parse(url), mode: LaunchMode.externalApplication),
+      style: OutlinedButton.styleFrom(
+        foregroundColor: Colors.white,
+        side: BorderSide(color: Colors.white.withOpacity(0.7)),
+      ),
+      icon: const Icon(Icons.open_in_new, size: 18),
+      label: const Text('Ouvrir'),
+    );
+  }
+}
+
 class _StatusPill extends StatelessWidget {
   const _StatusPill({required this.label, required this.color, required this.pulse});
   final String label;