feat(client): P4 节点实测延迟/设备/套餐价/兑换/统计接真(#6 6D)

- latency_probe.dart:并行 TCP 握手实测各节点 per-client RTT(服务端无法代知)。
- nodes_provider:解析 /v1/nodes 的 host/port,后台测延迟回填 Node.ping;智能选择
  按实测最小;去掉 8 个伪造演示节点(空列表用中性占位,不再伪造服务器)。
- Node:+host/port/copyWith/pingLabel(未测显示 —);各端 ping 显示改 pingLabel。
- account_screens:PlansScreen 接 /v1/plans(价格 priceLabel + me 标当前档);
  DevicesScreen 接 /v1/me/devices + 移除 DELETE + last_seen;RedeemScreen 接
  /v1/redeem(成功刷新 me,失败显示后端文案)。
- stats_page:周柱接 me.weekly_gb,本月流量/时长接 usage(30),延迟用生效节点实测。
- 顺带补登记早前 log_time.dart 的删除(log.dart 重构遗漏 stage)。

flutter analyze 0 error;115 tests passed;受影响 4 golden 重生成。
本机设备高亮 + 真实 device id 随 P6(device_info_plus)落地。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/lib/bridge/log_time.dart

@@ -1,8 +0,0 @@
-// log_time.dart — 桌面端日志统一时间戳前缀。
-// 返回本地时间 "[HH:MM:SS.mmm] ",拼在日志行首便于排查时序。
-
-String logTime() {
-  final n = DateTime.now();
-  String p(int v, [int w = 2]) => v.toString().padLeft(w, '0');
-  return '[${p(n.hour)}:${p(n.minute)}:${p(n.second)}.${p(n.millisecond, 3)}] ';
-}

client/lib/models/node.dart

@@ -14,10 +14,11 @@ class Node {
     this.uuid = '',
     this.tier = 'free',
     this.tag = NodeTag.none,
+    this.host = '',
+    this.port = 0,
   });
 
   /// 服务端 UUID，用于 POST /v1/nodes/{uuid}/connect。
-  /// 演示节点为空字符串。
   final String uuid;
 
   /// 2 字母国家码(HK/JP/SG…),界面以码块渲染,绝不用 emoji 国旗。
@@ -28,10 +29,29 @@ class Node {
   /// 节点层级：'free' | 'pro'。
   final String tier;
 
-  /// 演示延迟(ms)；真实节点由探针数据填充。
+  /// 客户端实测延迟(ms);0 = 尚未测得(显示 — )。
   final int ping;
   final NodeTag tag;
 
+  /// 节点入口 host/port(来自 /v1/nodes),用于客户端 TCP 实测延迟。
+  final String host;
+  final int port;
+
+  /// 延迟标签:测得显示「Nms」,未测显示「—」。
+  String get pingLabel => ping > 0 ? '${ping}ms' : '—';
+
+  Node copyWith({int? ping}) => Node(
+        code: code,
+        nameZh: nameZh,
+        nameEn: nameEn,
+        ping: ping ?? this.ping,
+        uuid: uuid,
+        tier: tier,
+        tag: tag,
+        host: host,
+        port: port,
+      );
+
   String localizedName(AppLang lang) => lang == AppLang.zh ? nameZh : nameEn;
 
   /// 副标题:有标签时显示语义文字,否则用拉丁地名(两语言通用,不串语言)。
@@ -50,14 +70,5 @@ class Node {
 /// 智能选择的哨兵选中值。
 const String kSmartNodeCode = 'AUTO';
 
-/// 演示节点清单(对齐 design/ui_kits/mobile/parts.jsx 的 SERVERS)。
-const List<Node> kDemoNodes = [
-  Node(code: 'HK', nameZh: '香港 · 流媒体', nameEn: 'Hong Kong', ping: 18, tag: NodeTag.streaming),
-  Node(code: 'JP', nameZh: '日本 东京', nameEn: 'Tokyo', ping: 32, tag: NodeTag.p2p),
-  Node(code: 'SG', nameZh: '新加坡', nameEn: 'Singapore', ping: 54, tag: NodeTag.p2p),
-  Node(code: 'TW', nameZh: '台湾 台北', nameEn: 'Taipei', ping: 28),
-  Node(code: 'US', nameZh: '美国 洛杉矶', nameEn: 'Los Angeles', ping: 146, tag: NodeTag.streaming),
-  Node(code: 'DE', nameZh: '德国 法兰克福', nameEn: 'Frankfurt', ping: 198),
-  Node(code: 'UK', nameZh: '英国 伦敦', nameEn: 'London', ping: 210),
-  Node(code: 'KR', nameZh: '韩国 首尔', nameEn: 'Seoul', ping: 41),
-];
+/// 节点未就绪时的中性占位(非伪造服务器,仅加载窗口短暂展示)。
+const Node kPlaceholderNode = Node(code: '··', nameZh: '加载中', nameEn: 'Loading', ping: 0);

client/lib/screens/connect_page.dart

@@ -186,7 +186,7 @@ class _SpeedRow extends StatelessWidget {
     final metrics = [
       (PangolinIcons.arrowDown, t.download, '86.4', 'Mb/s'),
       (PangolinIcons.arrowUp, t.upload, '12.1', 'Mb/s'),
-      (PangolinIcons.zap, t.latency, '${node.ping}', 'ms'),
+      (PangolinIcons.zap, t.latency, node.ping > 0 ? '${node.ping}' : '—', 'ms'),
     ];
     return Row(children: [
       for (var i = 0; i < metrics.length; i++)
@@ -245,8 +245,8 @@ class _CurrentNodeCard extends StatelessWidget {
     final c = context.pangolin;
     final title = smart ? t.smartSelect : node.localizedName(t.lang);
     final sub = smart
-        ? '${node.localizedName(t.lang)} · ${node.ping}ms'
-        : '${node.localizedSub(t.lang)} · ${node.ping}ms';
+        ? '${node.localizedName(t.lang)} · ${node.pingLabel}'
+        : '${node.localizedSub(t.lang)} · ${node.pingLabel}';
     return Material(
       color: c.surface,
       shape: RoundedRectangleBorder(
@@ -296,8 +296,8 @@ class _NodePill extends StatelessWidget {
   Widget build(BuildContext context) {
     final c = context.pangolin;
     final label = smart
-        ? '${t.smartSelect} · ${node.localizedName(t.lang)} · ${node.ping}ms'
-        : '${node.localizedName(t.lang)} · ${node.ping}ms';
+        ? '${t.smartSelect} · ${node.localizedName(t.lang)} · ${node.pingLabel}'
+        : '${node.localizedName(t.lang)} · ${node.pingLabel}';
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 6),
       decoration: BoxDecoration(

client/lib/screens/nodes_page.dart

@@ -45,7 +45,7 @@ class _NodesPageState extends ConsumerState<NodesPage> {
     final c = context.pangolin;
     final t = ref.watch(appTextProvider);
     final selected = ref.watch(selectedNodeCodeProvider);
-    final nodes = _filtered(ref.watch(nodesProvider).valueOrNull ?? kDemoNodes);
+    final nodes = _filtered(ref.watch(nodesProvider).valueOrNull ?? const <Node>[]);
     final smart = selected == kSmartNodeCode;
 
     final smartCard = SmartSelectCard(t: t, selected: smart, onTap: () => _pick(kSmartNodeCode));
@@ -184,7 +184,7 @@ class _NodeGridTile extends StatelessWidget {
             ),
             const SizedBox(width: 8),
             Column(mainAxisSize: MainAxisSize.min, crossAxisAlignment: CrossAxisAlignment.end, children: [
-              Text('${node.ping}ms', style: PangolinText.mono.copyWith(color: c.fg2, fontSize: 12)),
+              Text(node.pingLabel, style: PangolinText.mono.copyWith(color: c.fg2, fontSize: 12)),
               const SizedBox(height: 5),
               SignalBars(ping: node.ping),
             ]),

client/lib/screens/stats_page.dart

@@ -2,28 +2,39 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import '../models/usage_point.dart';
 import '../pangolin_theme.dart';
+import '../state/account_providers.dart';
 import '../state/app_providers.dart';
+import '../state/nodes_provider.dart';
 import '../widgets/app_top_bar.dart';
 
 class StatsPage extends ConsumerWidget {
   const StatsPage({super.key, required this.isWide});
   final bool isWide;
 
-  static const _vals = [2.1, 3.4, 1.8, 4.6, 5.2, 6.1, 3.0];
-
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final c = context.pangolin;
     final t = ref.watch(appTextProvider);
-    final maxV = _vals.reduce((a, b) => a > b ? a : b);
+
+    // 真实数据:周柱来自 me.weekly_gb;本月流量/时长来自 usage(30);延迟为生效节点实测。
+    final me = ref.watch(meProvider).valueOrNull;
+    final usage = ref.watch(usageProvider(30)).valueOrNull ?? const <UsagePoint>[];
+    final node = ref.watch(effectiveNodeProvider);
+
+    final weekly = (me?.weeklyGb.length == 7) ? me!.weeklyGb : List<double>.filled(7, 0.0);
+    final maxV = weekly.fold<double>(0, (a, b) => a > b ? a : b);
+    final denom = maxV <= 0 ? 1.0 : maxV;
+    final monthGb = usage.fold<double>(0, (s, p) => s + p.gbTotal);
+    final monthHours = usage.fold<int>(0, (s, p) => s + p.minutesUsed) / 60.0;
     // desktop 对照 dapp.jsx DStats：padding 32/8、卡 gap 14、柱 height 120·bar×86·宽 34。
     final pad = isWide ? 32.0 : 20.0;
 
     final metrics = [
-      (t.trafficMonth, '42.6', 'GB'),
-      (t.avgPing, '29', 'ms'),
-      (t.durMonth, '86.4', 'h'),
+      (t.trafficMonth, monthGb.toStringAsFixed(1), 'GB'),
+      (t.avgPing, node.ping > 0 ? '${node.ping}' : '—', 'ms'),
+      (t.durMonth, monthHours.toStringAsFixed(1), 'h'),
     ];
 
     final body = ListView(
@@ -55,15 +66,15 @@ class StatsPage extends ConsumerWidget {
               // 柱最高 86 + 上下数值/星期标签两行 + 间距 ≈ 134，留余量 140 避免溢出。
               height: 140,
               child: Row(crossAxisAlignment: CrossAxisAlignment.end, children: [
-                for (var i = 0; i < _vals.length; i++)
+                for (var i = 0; i < weekly.length; i++)
                   Expanded(
                     child: Column(mainAxisAlignment: MainAxisAlignment.end, children: [
-                      Text('${_vals[i]}', style: PangolinText.mono.copyWith(fontSize: 10.5, color: c.fg3)),
+                      Text(weekly[i].toStringAsFixed(1), style: PangolinText.mono.copyWith(fontSize: 10.5, color: c.fg3)),
                       const SizedBox(height: 8),
                       ConstrainedBox(
                         constraints: const BoxConstraints(maxWidth: 34),
                         child: Container(
-                          height: 86 * (_vals[i] / maxV),
+                          height: 86 * (weekly[i] / denom),
                           decoration: BoxDecoration(
                             color: c.accent.withOpacity(0.85),
                             borderRadius: const BorderRadius.vertical(top: Radius.circular(6)),

client/lib/services/latency_probe.dart

@@ -0,0 +1,42 @@
+// latency_probe.dart — 客户端实测节点延迟。
+//
+// per-client 到节点的 RTT 服务端无法代知(agent 到控制面的 RTT ≠ 用户 ping),
+// 故由客户端对各节点入口做并行 TCP 握手计时,得到真实 per-client 延迟。
+// 取多次取最小(规避抖动),失败返回 0(UI 显示 — )。
+import 'dart:async';
+import 'dart:io';
+
+/// 对 [host]:[port] 做 [samples] 次 TCP 握手,返回最小耗时(ms);全失败返回 0。
+Future<int> probeLatency(
+  String host,
+  int port, {
+  int samples = 2,
+  Duration timeout = const Duration(seconds: 3),
+}) async {
+  if (host.isEmpty || port <= 0) return 0;
+  int best = 0;
+  for (var i = 0; i < samples; i++) {
+    final sw = Stopwatch()..start();
+    try {
+      final socket = await Socket.connect(host, port, timeout: timeout);
+      sw.stop();
+      socket.destroy();
+      final ms = sw.elapsedMilliseconds;
+      if (best == 0 || ms < best) best = ms;
+    } catch (_) {
+      // 单次失败忽略,继续下一次采样。
+    }
+  }
+  return best;
+}
+
+/// 并行测一组 (uuid, host, port),返回 uuid→延迟(ms)。
+Future<Map<String, int>> probeAll(
+  Iterable<({String uuid, String host, int port})> targets,
+) async {
+  final entries = await Future.wait(targets.map((tg) async {
+    final ms = await probeLatency(tg.host, tg.port);
+    return MapEntry(tg.uuid, ms);
+  }));
+  return Map.fromEntries(entries);
+}

client/lib/state/account_providers.dart

@@ -5,6 +5,7 @@
 // 在后续阶段加入本文件。
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import '../models/device.dart';
 import '../models/me.dart';
 import '../models/plan.dart';
 import '../models/usage_point.dart';
@@ -58,3 +59,22 @@ final usageProvider = FutureProvider.family<List<UsagePoint>, int>((ref, days) a
   if (!ref.watch(authProvider).isLoggedIn) return const [];
   return ref.read(accountApiProvider).usage(days: days);
 });
+
+/// 已登录设备列表(GET /v1/me/devices)。
+class DevicesNotifier extends AsyncNotifier<List<Device>> {
+  @override
+  Future<List<Device>> build() async {
+    if (!ref.watch(authProvider).isLoggedIn) return const [];
+    return ref.read(accountApiProvider).devices();
+  }
+
+  /// 移除设备(DELETE)后刷新列表。
+  Future<void> remove(String uuid) async {
+    await ref.read(accountApiProvider).removeDevice(uuid);
+    ref.invalidateSelf();
+    await future;
+  }
+}
+
+final devicesProvider =
+    AsyncNotifierProvider<DevicesNotifier, List<Device>>(DevicesNotifier.new);

client/lib/state/nodes_provider.dart

@@ -1,49 +1,65 @@
-// nodes_provider.dart — 节点清单 + 当前选择
+// nodes_provider.dart — 节点清单 + 当前选择 + 实测延迟
 //
-// 从 GET /v1/nodes 拉取节点列表；认证后自动刷新。
-// 未登录 / 加载中时退回演示节点（kDemoNodes）保证 UI 正常显示。
+// 从 GET /v1/nodes 拉取真实节点(含 host/port);拉取后后台对各节点做 TCP 握手
+// 实测 per-client 延迟并回填。未登录 / 失败返回空列表(不再伪造演示节点)。
+import 'dart:async';
 import 'dart:convert';
 
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:http/http.dart' as http;
 
 import '../models/node.dart';
+import '../services/api_config.dart';
+import '../services/latency_probe.dart';
 import 'auth_provider.dart';
 
-// ── API base URL（由 --dart-define 注入）──────────────────────────
-
-const _kApiUrl = String.fromEnvironment(
-  'PANGOLIN_API_URL',
-  defaultValue: 'http://localhost:8080',
-);
-
 // ── 节点列表 AsyncNotifier ────────────────────────────────────────
 
 class NodesNotifier extends AsyncNotifier<List<Node>> {
+  bool _disposed = false;
+
   @override
   Future<List<Node>> build() async {
+    ref.onDispose(() => _disposed = true);
     final auth = ref.watch(authProvider);
-    if (!auth.isLoggedIn) return kDemoNodes;
-    return _fetchNodes(auth.accessToken!);
+    if (!auth.isLoggedIn) return const [];
+    final list = await _fetchNodes(auth.accessToken!);
+    unawaited(_measure(list));
+    return list;
   }
 
   Future<void> refresh() async {
-    state = const AsyncLoading();
     final auth = ref.read(authProvider);
     if (!auth.isLoggedIn) {
-      state = AsyncData(kDemoNodes);
+      state = const AsyncData([]);
       return;
     }
-    state = await AsyncValue.guard(() => _fetchNodes(auth.accessToken!));
+    state = const AsyncLoading();
+    state = await AsyncValue.guard(() async {
+      final list = await _fetchNodes(auth.accessToken!);
+      unawaited(_measure(list));
+      return list;
+    });
+  }
+
+  /// 后台实测各节点延迟,完成后回填(notifier 未销毁才更新)。
+  Future<void> _measure(List<Node> list) async {
+    if (list.isEmpty) return;
+    final pings = await probeAll(
+      [for (final n in list) (uuid: n.uuid, host: n.host, port: n.port)],
+    );
+    if (_disposed) return;
+    final updated = [for (final n in list) n.copyWith(ping: pings[n.uuid] ?? n.ping)];
+    state = AsyncData(updated);
   }
 
   static Future<List<Node>> _fetchNodes(String accessToken) async {
-    final uri = Uri.parse('$_kApiUrl/v1/nodes');
+    final uri = Uri.parse('$kApiBaseUrl/v1/nodes');
     final resp = await http.get(uri, headers: {
       'Authorization': 'Bearer $accessToken',
     }).timeout(const Duration(seconds: 10));
 
-    if (resp.statusCode != 200) return kDemoNodes;
+    if (resp.statusCode != 200) return const [];
 
     final body = jsonDecode(resp.body) as Map<String, dynamic>;
     final rawList = body['nodes'] as List<dynamic>? ?? [];
@@ -55,7 +71,9 @@ class NodesNotifier extends AsyncNotifier<List<Node>> {
         nameZh: m['name_zh'] as String? ?? '',
         nameEn: m['name_en'] as String? ?? '',
         tier: m['tier'] as String? ?? 'free',
-        ping: 0, // 延迟由探针数据填充；MVP 默认 0
+        host: m['host'] as String? ?? '',
+        port: (m['port'] as num?)?.toInt() ?? 0,
+        ping: 0, // 由 _measure 实测回填
       );
     }).toList();
   }
@@ -64,7 +82,7 @@ class NodesNotifier extends AsyncNotifier<List<Node>> {
 final nodesProvider =
     AsyncNotifierProvider<NodesNotifier, List<Node>>(NodesNotifier.new);
 
-// ── 当前选中的节点 UUID；'AUTO' 表示智能选择（默认）─────────────────
+// ── 当前选中的节点 code；'AUTO' 表示智能选择(默认)─────────────────
 
 final selectedNodeCodeProvider = StateProvider<String>((ref) => kSmartNodeCode);
 
@@ -73,16 +91,18 @@ final isSmartSelectProvider = Provider<bool>(
   (ref) => ref.watch(selectedNodeCodeProvider) == kSmartNodeCode,
 );
 
-/// 实际生效的节点：同步拉取 AsyncValue；未就绪时取 kDemoNodes 第一条。
+/// 实际生效的节点:列表为空时返回占位;智能选择取实测延迟最小者(未测得排后)。
 final effectiveNodeProvider = Provider<Node>((ref) {
-  final nodesAsync = ref.watch(nodesProvider);
-  final nodes = nodesAsync.valueOrNull ?? kDemoNodes;
-  if (nodes.isEmpty) return kDemoNodes.first;
+  final nodes = ref.watch(nodesProvider).valueOrNull ?? const <Node>[];
+  if (nodes.isEmpty) return kPlaceholderNode;
 
   final code = ref.watch(selectedNodeCodeProvider);
   if (code == kSmartNodeCode) {
-    // 延迟最小者；MVP 无真实延迟时取第一条
-    return nodes.reduce((a, b) => a.ping <= b.ping ? a : b);
+    return nodes.reduce((a, b) {
+      final pa = a.ping > 0 ? a.ping : 1 << 30;
+      final pb = b.ping > 0 ? b.ping : 1 << 30;
+      return pa <= pb ? a : b;
+    });
   }
   return nodes.firstWhere((n) => n.code == code, orElse: () => nodes.first);
 });

client/lib/widgets/account_screens.dart

@@ -3,9 +3,13 @@
 // 文案全部经 AppText(l10n,单显)。套餐数字以 design/CLAUDE.md §7 为准。
 // App 内无任何支付表单——购买仅引导至外部渠道。
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../l10n/app_text.dart';
+import '../models/device.dart';
 import '../pangolin_theme.dart';
+import '../services/auth_api.dart';
+import '../state/account_providers.dart';
 import 'pangolin_button.dart';
 import 'pangolin_icons.dart';
 import 'plan_card.dart';
@@ -43,133 +47,149 @@ class _SubScaffold extends StatelessWidget {
   }
 }
 
-/// ── 套餐选择 ──
-class PlansScreen 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 [],
+      };
+
   @override
-  Widget build(BuildContext context) {
-    final plans = [
-      (id: 'free', name: t.freePlan, price: '¥0', cta: t.current, featured: false, current: true, pop: null as String?, feats: t.featsFree),
-      (id: 'pro', name: t.proPlan, price: '¥25', cta: t.upgrade, featured: true, current: false, pop: t.mostPopular, feats: t.featsPro),
-      (id: 'team', name: t.teamPlan, price: '¥99', cta: t.choose, featured: false, current: false, pop: null as String?, feats: t.featsTeam),
-    ];
-    return _SubScaffold(
-      title: t.choosePlan,
-      onBack: onBack,
-      embedded: embedded,
-      child: ListView(
-        padding: const EdgeInsets.fromLTRB(20, 14, 20, 24),
-        children: [
-          for (final p in plans)
-            Padding(
-              padding: EdgeInsets.only(bottom: 14, top: p.pop != null ? 12 : 0),
-              child: PlanCard(
-                name: p.name, price: p.price, period: t.perMonth,
-                features: p.feats, ctaLabel: p.cta, featured: p.featured, isCurrent: p.current,
-                popularLabel: p.pop, onPressed: () => onChoose?.call(p.id),
-              ),
-            ),
-        ],
-      ),
-    );
+  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 == AppLang.zh ? '加载失败,请重试' : 'Failed to load, retry', 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: p.localizedName(t.lang),
+                    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 ──
-class DeviceItem {
-  const DeviceItem({required this.id, required this.icon, required this.name, required this.os, required this.active, this.me = false});
-  final String id, name, os, active;
-  final IconData icon;
-  final bool me;
-}
-
-class DevicesScreen extends StatefulWidget {
+/// ── 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});
   final AppText t;
   final VoidCallback? onBack;
   final bool embedded;
-  @override
-  State<DevicesScreen> createState() => _DevicesScreenState();
-}
 
-class _DevicesScreenState extends State<DevicesScreen> {
-  late List<DeviceItem> _devices = [
-    DeviceItem(id: '1', icon: PangolinIcons.laptop, name: 'MacBook Pro', os: 'macOS 26', active: widget.t.thisDevice, me: true),
-    DeviceItem(id: '2', icon: PangolinIcons.smartphone, name: 'iPhone 17', os: 'iOS 26', active: '2 min'),
-    DeviceItem(id: '3', icon: PangolinIcons.monitorSmartphone, name: 'iPad Air', os: 'iPadOS 26', active: widget.t.lang == AppLang.zh ? '3 小时前' : '3h ago'),
-  ];
+  IconData _icon(String platform) => switch (platform.toLowerCase()) {
+        'ios' || 'android' => PangolinIcons.smartphone,
+        'macos' || 'windows' || 'linux' => PangolinIcons.laptop,
+        _ => PangolinIcons.monitorSmartphone,
+      };
 
-  @override
-  Widget build(BuildContext context) {
-    final c = context.pangolin;
-    return _SubScaffold(
-      title: widget.t.myDevices,
-      onBack: widget.onBack,
-      embedded: widget.embedded,
-      child: ListView(padding: const EdgeInsets.fromLTRB(20, 4, 20, 24), children: [
-        Text(widget.t.devicesSub, style: PangolinText.caption.copyWith(color: c.fg3, fontWeight: FontWeight.w400)),
-        const SizedBox(height: 12),
-        Container(
-          decoration: BoxDecoration(color: c.surface, borderRadius: BorderRadius.circular(PangolinRadius.lg), border: Border.all(color: c.border), boxShadow: PangolinShadow.sm),
-          clipBehavior: Clip.antiAlias,
-          child: Column(children: [
-            for (var i = 0; i < _devices.length; i++) _row(c, _devices[i], i < _devices.length - 1),
-          ]),
-        ),
-      ]),
-    );
+  String _lastSeen(DateTime? ts) {
+    final zh = t.lang == AppLang.zh;
+    if (ts == null) return zh ? '从未在线' : 'never';
+    final d = DateTime.now().difference(ts.toLocal());
+    if (d.inMinutes < 1) return zh ? '刚刚' : 'just now';
+    if (d.inMinutes < 60) return zh ? '${d.inMinutes} 分钟前' : '${d.inMinutes} min ago';
+    if (d.inHours < 24) return zh ? '${d.inHours} 小时前' : '${d.inHours}h ago';
+    return zh ? '${d.inDays} 天前' : '${d.inDays}d ago';
   }
 
-  Widget _row(PangolinScheme c, DeviceItem d, bool divider) {
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final c = context.pangolin;
+    final devicesAsync = ref.watch(devicesProvider);
+
+    Widget content() => devicesAsync.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 == AppLang.zh ? '加载失败,请重试' : 'Failed to load, retry', style: PangolinText.body.copyWith(color: c.fg3)))),
+          data: (devices) => ListView(padding: const EdgeInsets.fromLTRB(20, 4, 20, 24), children: [
+            Text(t.devicesSub, style: PangolinText.caption.copyWith(color: c.fg3, fontWeight: FontWeight.w400)),
+            const SizedBox(height: 12),
+            if (devices.isEmpty)
+              Text(t.lang == AppLang.zh ? '暂无已登录设备' : 'No devices yet',
+                  style: PangolinText.sm.copyWith(color: c.fg3))
+            else
+              Container(
+                decoration: BoxDecoration(color: c.surface, borderRadius: BorderRadius.circular(PangolinRadius.lg), border: Border.all(color: c.border), boxShadow: PangolinShadow.sm),
+                clipBehavior: Clip.antiAlias,
+                child: Column(children: [
+                  for (var i = 0; i < devices.length; i++) _row(ref, c, devices[i], i < devices.length - 1),
+                ]),
+              ),
+          ]),
+        );
+
+    return _SubScaffold(title: t.myDevices, onBack: onBack, embedded: embedded, child: content());
+  }
+
+  Widget _row(WidgetRef ref, PangolinScheme c, Device d, bool divider) {
+    final name = d.name.isNotEmpty ? d.name : d.platform;
     return Container(
       decoration: BoxDecoration(border: divider ? Border(bottom: BorderSide(color: c.border)) : null),
       padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
       child: Row(children: [
         Container(width: 38, height: 38, decoration: BoxDecoration(color: c.accentSubtle, borderRadius: BorderRadius.circular(PangolinRadius.md)),
-            child: Icon(d.icon, size: 19, color: c.accent)),
+            child: Icon(_icon(d.platform), size: 19, color: c.accent)),
         const SizedBox(width: 12),
         Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
-          Row(children: [
-            Flexible(child: Text(d.name, style: PangolinText.sm.copyWith(color: c.fg1, fontWeight: FontWeight.w600, fontSize: 14.5))),
-            if (d.me)
-              Container(
-                margin: const EdgeInsets.only(left: 7), padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 1),
-                decoration: BoxDecoration(color: c.successSubtle, borderRadius: BorderRadius.circular(PangolinRadius.full)),
-                child: Text(d.active, style: PangolinText.caption.copyWith(color: c.success, fontWeight: FontWeight.w600, fontSize: 10.5)),
-              ),
-          ]),
+          Text(name, style: PangolinText.sm.copyWith(color: c.fg1, fontWeight: FontWeight.w600, fontSize: 14.5)),
           const SizedBox(height: 1),
-          Text(d.me ? d.os : '${d.os} · ${d.active}', style: PangolinText.caption.copyWith(color: c.fg3, fontWeight: FontWeight.w400)),
+          Text('${d.platform} · ${_lastSeen(d.lastSeen)}', style: PangolinText.caption.copyWith(color: c.fg3, fontWeight: FontWeight.w400)),
         ])),
-        if (!d.me)
-          OutlinedButton(
-            onPressed: () => setState(() => _devices.removeWhere((x) => x.id == d.id)),
-            style: OutlinedButton.styleFrom(foregroundColor: c.fg2, side: BorderSide(color: c.borderStrong, width: 1.5), shape: const StadiumBorder(), padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 7), minimumSize: Size.zero),
-            child: Text(widget.t.remove, style: PangolinText.caption.copyWith(fontWeight: FontWeight.w600)),
-          ),
+        OutlinedButton(
+          onPressed: () => ref.read(devicesProvider.notifier).remove(d.uuid),
+          style: OutlinedButton.styleFrom(foregroundColor: c.fg2, side: BorderSide(color: c.borderStrong, width: 1.5), shape: const StadiumBorder(), padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 7), minimumSize: Size.zero),
+          child: Text(t.remove, style: PangolinText.caption.copyWith(fontWeight: FontWeight.w600)),
+        ),
       ]),
     );
   }
 }
 
-/// ── 兑换 & 购买 ──
-class RedeemScreen extends StatefulWidget {
+/// ── 兑换 & 购买 ── (兑换码走 POST /v1/redeem,成功后刷新账户)
+class RedeemScreen extends ConsumerStatefulWidget {
   const RedeemScreen({super.key, required this.t, this.onBack, this.embedded = false});
   final AppText t;
   final VoidCallback? onBack;
   final bool embedded;
   @override
-  State<RedeemScreen> createState() => _RedeemScreenState();
+  ConsumerState<RedeemScreen> createState() => _RedeemScreenState();
 }
 
-class _RedeemScreenState extends State<RedeemScreen> {
+class _RedeemScreenState extends ConsumerState<RedeemScreen> {
   final _code = TextEditingController();
   bool _ok = false;
+  bool _busy = false;
+  String? _err;
 
   @override
   void dispose() {
@@ -177,6 +197,25 @@ class _RedeemScreenState extends State<RedeemScreen> {
     super.dispose();
   }
 
+  Future<void> _redeem() async {
+    final code = _code.text.trim();
+    if (code.isEmpty) return;
+    setState(() {
+      _busy = true;
+      _err = null;
+    });
+    try {
+      await ref.read(accountApiProvider).redeem(code);
+      // 订阅变化 → 刷新账户聚合,套餐横幅/额度随之更新。
+      await ref.read(meProvider.notifier).refresh();
+      if (mounted) setState(() => _ok = true);
+    } on AuthApiException catch (e) {
+      if (mounted) setState(() => _err = widget.t.lang == AppLang.zh ? e.messageZh : e.messageEn);
+    } finally {
+      if (mounted) setState(() => _busy = false);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final c = context.pangolin;
@@ -218,8 +257,12 @@ class _RedeemScreenState extends State<RedeemScreen> {
                   ),
                 )),
                 const SizedBox(width: 10),
-                PangolinButton(label: t.redeemBtn, onPressed: _code.text.trim().length >= 4 ? () => setState(() => _ok = true) : null),
+                PangolinButton(label: t.redeemBtn, onPressed: (_busy || _code.text.trim().length < 4) ? null : _redeem),
               ]),
+            if (_err != null) ...[
+              const SizedBox(height: 10),
+              Text(_err!, style: PangolinText.caption.copyWith(color: c.danger, fontWeight: FontWeight.w500)),
+            ],
           ]),
         ),
         const SizedBox(height: 22),

client/lib/widgets/server_tile.dart

@@ -65,7 +65,7 @@ class ServerTile extends StatelessWidget {
                 ],
               ),
             ),
-            Text('${node.ping}ms', style: PangolinText.mono.copyWith(color: c.fg2, fontSize: 12)),
+            Text(node.pingLabel, style: PangolinText.mono.copyWith(color: c.fg2, fontSize: 12)),
             const SizedBox(width: 8),
             SignalBars(ping: node.ping),
             if (active) ...[const SizedBox(width: 10), Icon(PangolinIcons.check, size: 18, color: c.accent)],

client/test/unit/nodes_provider_test.dart

@@ -25,13 +25,23 @@ class _NullTokenStore implements TokenStore {
   Future<bool> isOnboarded() async => true;
 }
 
-// ── 辅助：带 stub 覆盖的 ProviderContainer ──────────────────────
+// 直接喂固定节点列表(不触发真实探针/HTTP)。
+class _FakeNodes extends NodesNotifier {
+  _FakeNodes(this.list);
+  final List<Node> list;
+  @override
+  Future<List<Node>> build() async => list;
+}
+
+const _nodes = [
+  Node(code: 'HK', nameZh: '香港', nameEn: 'Hong Kong', ping: 30, uuid: 'hk'),
+  Node(code: 'JP', nameZh: '日本', nameEn: 'Tokyo', ping: 12, uuid: 'jp'),
+  Node(code: 'US', nameZh: '美国', nameEn: 'LA', ping: 200, uuid: 'us'),
+];
 
 ProviderContainer makeContainer({List<Override> overrides = const []}) =>
     ProviderContainer(overrides: [
       tokenStoreProvider.overrideWithValue(const _NullTokenStore()),
-      // effectiveNodeProvider 在 nodesProvider 加载时退回 kDemoNodes，
-      // 所以测试直接读 effectiveNodeProvider，无需等待 nodesProvider.future。
       ...overrides,
     ]);
 
@@ -43,21 +53,31 @@ void main() {
     expect(c.read(isSmartSelectProvider), true);
   });
 
-  test('智能选择取延迟最小节点（退回 kDemoNodes）', () {
+  test('无节点时 effectiveNode 返回占位(不再伪造演示节点)', () {
     final c = makeContainer();
     addTearDown(c.dispose);
-    // nodesProvider 加载中时退回 kDemoNodes，effectiveNodeProvider 立即可用。
-    final node = c.read(effectiveNodeProvider);
-    final minPing = kDemoNodes.map((n) => n.ping).reduce((a, b) => a < b ? a : b);
-    expect(node.ping, minPing);
+    expect(c.read(effectiveNodeProvider).code, kPlaceholderNode.code);
   });
 
-  test('选中具体节点后生效节点随之改变', () {
-    final c = makeContainer();
+  test('智能选择取实测延迟最小节点', () async {
+    final c = makeContainer(overrides: [nodesProvider.overrideWith(() => _FakeNodes(_nodes))]);
     addTearDown(c.dispose);
-    c.read(selectedNodeCodeProvider.notifier).state = 'JP';
+    await c.read(nodesProvider.future);
+    expect(c.read(effectiveNodeProvider).code, 'JP'); // ping 12 最小
+  });
+
+  test('选中具体节点后生效节点随之改变', () async {
+    final c = makeContainer(overrides: [nodesProvider.overrideWith(() => _FakeNodes(_nodes))]);
+    addTearDown(c.dispose);
+    await c.read(nodesProvider.future);
+    c.read(selectedNodeCodeProvider.notifier).state = 'US';
     expect(c.read(isSmartSelectProvider), false);
-    expect(c.read(effectiveNodeProvider).code, 'JP');
+    expect(c.read(effectiveNodeProvider).code, 'US');
+  });
+
+  test('pingLabel:未测得显示 —', () {
+    expect(const Node(code: 'X', nameZh: 'x', nameEn: 'x', ping: 0).pingLabel, '—');
+    expect(const Node(code: 'X', nameZh: 'x', nameEn: 'x', ping: 42).pingLabel, '42ms');
   });
 
   test('localizedSub 不串语言:无标签用拉丁地名', () {