feat: replace ListView with SingleChildScrollView for better layout in admin panels

flutter/lib/features/admin/presentation/admin_users_panel.dart

@@ -349,33 +349,36 @@ class _AdminUsersPanelState extends ConsumerState<AdminUsersPanel> {
       return list;
     }
 
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        Row(
-          children: [
-            Expanded(
-              child: Text(
-                context.l10n.adminUsersDescription,
-                style: theme.textTheme.bodyMedium,
+    return SingleChildScrollView(
+      padding: const EdgeInsets.all(12),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            children: [
+              Expanded(
+                child: Text(
+                  context.l10n.adminUsersDescription,
+                  style: theme.textTheme.bodyMedium,
+                ),
               ),
-            ),
-            IconButton(
-              icon: const Icon(Icons.refresh),
-              tooltip: 'Uppdatera',
-              onPressed: _load,
-            ),
-          ],
-        ),
-        const SizedBox(height: 8),
-        FilledButton.icon(
-          onPressed: _createUser,
-          icon: const Icon(Icons.person_add_outlined),
-          label: Text(context.l10n.adminNewUser),
-        ),
-        const SizedBox(height: 16),
-        Expanded(child: list),
-      ],
+              IconButton(
+                icon: const Icon(Icons.refresh),
+                tooltip: 'Uppdatera',
+                onPressed: _load,
+              ),
+            ],
+          ),
+          const SizedBox(height: 8),
+          FilledButton.icon(
+            onPressed: _createUser,
+            icon: const Icon(Icons.person_add_outlined),
+            label: Text(context.l10n.adminNewUser),
+          ),
+          const SizedBox(height: 16),
+          list,
+        ],
+      ),
     );
   }
 }