refactor(client): 删除死代码 PlansScreen + NavView.plans + choosePlan l10n(Renew→Purchase 直达后无调用者)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

client/lib/widgets/account_screens.dart

@@ -20,7 +20,6 @@ import '../services/auth_api.dart';
 import '../state/account_providers.dart';
 import 'pangolin_button.dart';
 import 'pangolin_icons.dart';
-import 'plan_card.dart';
 
 /// 通用:带返回箭头的子页骨架。embedded=true 时只返回内容（desktop 内容区下钻，
 /// 返回/标题由外层 shell 顶栏提供），否则整页 Scaffold（mobile/tablet 全屏 push）。
@@ -67,66 +66,6 @@ class SettingsScreen extends StatelessWidget {
   }
 }
 
-/// ── 套餐选择 ── (价格/额度来自 GET /v1/plans;当前档由 me.plan 判定;
-/// 功能清单仍取 l10n,后端无此字段)
-class PlansScreen extends ConsumerWidget {
-  const PlansScreen({super.key, required this.t, this.onChoose, this.onBack, this.embedded = false});
-  final AppText t;
-  final ValueChanged<String>? onChoose;
-  final VoidCallback? onBack;
-  final bool embedded;
-
-  List<String> _feats(String code) => switch (code) {
-        'free' => t.featsFree,
-        'pro' => t.featsPro,
-        'team' => t.featsTeam,
-        _ => const [],
-      };
-
-  // 套餐名是 UI 文案(后端 plans 表无名称列),按 code 取 l10n。
-  String _name(String code) => switch (code) {
-        'free' => t.freePlan,
-        'pro' => t.proPlan,
-        'team' => t.teamPlan,
-        _ => code,
-      };
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    final c = context.pangolin;
-    final plansAsync = ref.watch(plansProvider);
-    final myPlan = ref.watch(meProvider).valueOrNull?.plan ?? 'free';
-
-    Widget body() => plansAsync.when(
-          loading: () => const Center(child: Padding(padding: EdgeInsets.all(40), child: CircularProgressIndicator())),
-          error: (_, __) => Center(
-              child: Padding(padding: const EdgeInsets.all(40), child: Text(t.lang.loadFailedRetry, style: PangolinText.body.copyWith(color: c.fg3)))),
-          data: (plans) => ListView(
-            padding: const EdgeInsets.fromLTRB(20, 14, 20, 24),
-            children: [
-              for (final p in plans)
-                Padding(
-                  padding: EdgeInsets.only(bottom: 14, top: p.code == 'pro' ? 12 : 0),
-                  child: PlanCard(
-                    name: _name(p.code),
-                    price: p.priceLabel(),
-                    period: t.perMonth,
-                    features: _feats(p.code),
-                    ctaLabel: p.code == myPlan ? t.current : (p.code == 'team' ? t.choose : t.upgrade),
-                    featured: p.code == 'pro',
-                    isCurrent: p.code == myPlan,
-                    popularLabel: p.code == 'pro' ? t.mostPopular : null,
-                    onPressed: () => onChoose?.call(p.code),
-                  ),
-                ),
-            ],
-          ),
-        );
-
-    return _SubScaffold(title: t.choosePlan, onBack: onBack, embedded: embedded, child: body());
-  }
-}
-
 /// ── 设备管理 ── (真实 GET /v1/me/devices;移除 = DELETE。本机高亮待 P6 设备 id)
 class DevicesScreen extends ConsumerWidget {
   const DevicesScreen({super.key, required this.t, this.onBack, this.embedded = false});