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

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

@@ -296,13 +296,16 @@ class _AdminAliasesPanelState extends ConsumerState<AdminAliasesPanel> {
 
     if (filteredAliases.isEmpty) return content;
 
-    return Column(
+    return SingleChildScrollView(
+      padding: const EdgeInsets.all(12),
+      child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           content,
           const SizedBox(height: 8),
-        Expanded(child: buildAliasList()),
+          ...filteredAliases.map(buildAliasCard),
         ],
+      ),
     );
   }
 }

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

@@ -140,7 +140,9 @@ class _AdminPendingProductsPanelState
 
     if (!widget.embedded) return content;
 
-    return Column(
+    return SingleChildScrollView(
+      padding: const EdgeInsets.all(12),
+      child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Text(
@@ -148,8 +150,9 @@ class _AdminPendingProductsPanelState
             style: theme.textTheme.bodyMedium,
           ),
           const SizedBox(height: 12),
-        Expanded(child: content),
+          content,
         ],
+      ),
     );
   }
 }

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

@@ -738,9 +738,9 @@ class _AdminProductsPanelState extends ConsumerState<AdminProductsPanel> {
       );
     }
 
-    return ListView(
+    return SingleChildScrollView(
-      padding: EdgeInsets.zero,
+      padding: const EdgeInsets.all(12),
-      children: [content],
+      child: content,
     );
   }
 }

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

@@ -349,7 +349,9 @@ class _AdminUsersPanelState extends ConsumerState<AdminUsersPanel> {
       return list;
     }
 
-    return Column(
+    return SingleChildScrollView(
+      padding: const EdgeInsets.all(12),
+      child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Row(
@@ -374,8 +376,9 @@ class _AdminUsersPanelState extends ConsumerState<AdminUsersPanel> {
             label: Text(context.l10n.adminNewUser),
           ),
           const SizedBox(height: 16),
-        Expanded(child: list),
+          list,
         ],
+      ),
     );
   }
 }