refactoring and checkpoint

lib/presentation/widgets/group_list.dart

@@ -0,0 +1,63 @@
+import 'package:flutter/material.dart';
+
+class GroupList extends StatelessWidget {
+  final Size size;
+
+  const GroupList({required this.size, Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: List.generate(3, (index) {
+        return Container(
+          margin: const EdgeInsets.only(bottom: 20),
+          padding: const EdgeInsets.all(16.0),
+          width: size.width,
+          decoration: BoxDecoration(
+            color: Colors.grey[850],
+            borderRadius: BorderRadius.circular(12),
+            boxShadow: [
+              BoxShadow(
+                color: Colors.black.withOpacity(0.3),
+                blurRadius: 6,
+                offset: const Offset(0, 3),
+              ),
+            ],
+          ),
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: [
+              const CircleAvatar(
+                radius: 30,
+                backgroundImage: AssetImage('lib/assets/images/group_placeholder.png'),
+              ),
+              const SizedBox(width: 10),
+              const Expanded(
+                child: Text(
+                  'Club des Amateurs de Cinéma',
+                  style: TextStyle(
+                    color: Colors.white,
+                    fontSize: 18,
+                    fontWeight: FontWeight.w600,
+                  ),
+                ),
+              ),
+              ElevatedButton(
+                onPressed: () {
+                  print('Rejoindre le groupe');
+                },
+                style: ElevatedButton.styleFrom(
+                  backgroundColor: Colors.blueAccent,
+                  shape: RoundedRectangleBorder(
+                    borderRadius: BorderRadius.circular(8),
+                  ),
+                ),
+                child: const Text('Rejoindre'),
+              ),
+            ],
+          ),
+        );
+      }),
+    );
+  }
+}