refactor(client): SubScaffold 六合一(视觉零变化)+ tablet 注释订正 + 平板通知铃入口(#20)

client/lib/screens/invite_page.dart

@@ -16,6 +16,7 @@ import '../widgets/page_body.dart';
 import '../widgets/pangolin_button.dart';
 import '../widgets/pangolin_icons.dart';
 import '../widgets/pangolin_toast.dart';
+import '../widgets/sub_scaffold.dart';
 
 class InviteScreen extends ConsumerWidget {
   const InviteScreen({super.key, required this.t, this.onBack, this.embedded = false});
@@ -59,7 +60,6 @@ class InviteScreen extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    final c = context.pangolin;
     final inviteAsync = ref.watch(inviteProvider);
 
     Widget body = PageBody(child: inviteAsync.when(
@@ -70,24 +70,11 @@ class InviteScreen extends ConsumerWidget {
           : _InviteContent(t: t, info: info, onCopy: _copy, onVerifyAndClaim: (ctx) => _verifyAndClaim(ctx, ref)),
     ));
 
-    if (embedded) return body;
-    return Scaffold(
-      backgroundColor: c.bg,
-      body: SafeArea(
-        child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
-          Padding(
-            padding: const EdgeInsets.fromLTRB(8, 6, 16, 10),
-            child: Row(children: [
-              IconButton(
-                onPressed: onBack ?? () => Navigator.of(context).maybePop(),
-                icon: Icon(PangolinIcons.arrowLeft, size: 22, color: c.fg1),
-              ),
-              Text(t.inviteTitle, style: PangolinText.h3.copyWith(color: c.fg1, fontWeight: FontWeight.w700)),
-            ]),
-          ),
-          Expanded(child: body),
-        ]),
-      ),
+    return SubScaffold(
+      title: t.inviteTitle,
+      onBack: onBack,
+      embedded: embedded,
+      child: body,
     );
   }
 }