feat: Enhance container management UI with new management components and improved QR code generation flow

em2rp/lib/views/widgets/management/management_search_bar.dart

@@ -0,0 +1,69 @@
+import 'package:flutter/material.dart';
+import 'package:em2rp/utils/colors.dart';
+
+/// Widget réutilisable pour la barre de recherche dans les pages de gestion
+class ManagementSearchBar extends StatelessWidget {
+  final TextEditingController controller;
+  final String hintText;
+  final ValueChanged<String> onChanged;
+  final VoidCallback? onSelectionModeToggle;
+  final bool showSelectionModeButton;
+
+  const ManagementSearchBar({
+    super.key,
+    required this.controller,
+    required this.hintText,
+    required this.onChanged,
+    this.onSelectionModeToggle,
+    this.showSelectionModeButton = true,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: const EdgeInsets.all(16),
+      decoration: BoxDecoration(
+        color: Colors.white,
+        boxShadow: [
+          BoxShadow(
+            color: Colors.grey.withOpacity(0.1),
+            spreadRadius: 1,
+            blurRadius: 3,
+            offset: const Offset(0, 1),
+          ),
+        ],
+      ),
+      child: Row(
+        children: [
+          Expanded(
+            child: TextField(
+              controller: controller,
+              decoration: InputDecoration(
+                hintText: hintText,
+                prefixIcon: const Icon(Icons.search, color: AppColors.rouge),
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(8),
+                  borderSide: BorderSide(color: Colors.grey.shade300),
+                ),
+                contentPadding: const EdgeInsets.symmetric(
+                  horizontal: 16,
+                  vertical: 12,
+                ),
+              ),
+              onChanged: onChanged,
+            ),
+          ),
+          if (showSelectionModeButton && onSelectionModeToggle != null) ...[
+            const SizedBox(width: 12),
+            IconButton(
+              icon: const Icon(Icons.checklist, color: AppColors.rouge),
+              tooltip: 'Mode sélection',
+              onPressed: onSelectionModeToggle,
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+}
+