fix(ui): widen navigation rail for macOS traffic lights (#1582)

ui/flutter/lib/features/extensions/presentation/pages/extensions_page.dart

@@ -32,7 +32,8 @@ import '../widgets/extension_setting_field.dart';
 import '../widgets/extension_update_dialog.dart';
 import '../widgets/extension_update_status.dart';
 
-const _extensionCardMinWidth = 290.0;
+// Keep three columns in the 1024px reference window with the wider primary rail.
+const _extensionCardMinWidth = 280.0;
 const _extensionGridSpacing = 10.0;
 
 int _extensionGridColumnCount(double width) {

ui/flutter/lib/features/settings/presentation/pages/settings_page.dart

@@ -2128,7 +2128,7 @@ class _BrowserExtensionLinks extends StatelessWidget {
               children: [
                 const Icon(Icons.open_in_new, size: 15),
                 const SizedBox(width: AppDesignTokens.space8),
-                Text(link.label),
+                Flexible(child: Text(link.label, maxLines: 1, overflow: TextOverflow.ellipsis)),
               ],
             ),
           ),