feat(client): desktop 其他页精还原 + 整页 golden 闸

- stats_page 对照 dapp.jsx DStats 精对齐: padding 32/8、指标卡 padding 16/18·
  gap 14·值 mono 24、柱状图卡 padding 20/18·标题 13、柱 height 140(容 bar 86)·宽 34
- nodes_page 对照 DServers 微调: padding top 4、网格 gap 10(智能卡置顶保留, 符 §5)
- 新增 test/golden/desktop_pages_golden_test.dart: 用 macOS 平台覆盖 + 920×600 surface
  让 formFactor=desktop, 截 节点/统计/账户 三页整页 golden 作回归闸(连接页含旋转动画
  由组件级 golden 覆盖, 不在此截)

测试: flutter test 79 通过(+3 desktop 整页 golden), analyze 0 error

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/lib/screens/nodes_page.dart

@@ -52,8 +52,9 @@ class _NodesPageState extends ConsumerState<NodesPage> {
     final search = _SearchBox(hint: t.searchPh, onChanged: (v) => setState(() => _q = v));
 
     if (widget.isWide) {
+      // 对照 dapp.jsx DServers：padding 4/28、网格 gap 10。智能卡置顶（CLAUDE.md §5 规范，三端一致）。
       return ListView(
-        padding: const EdgeInsets.fromLTRB(28, 6, 28, 24),
+        padding: const EdgeInsets.fromLTRB(28, 4, 28, 24),
         children: [
           smartCard,
           const SizedBox(height: 14),
@@ -63,8 +64,8 @@ class _NodesPageState extends ConsumerState<NodesPage> {
             crossAxisCount: 2,
             shrinkWrap: true,
             physics: const NeverScrollableScrollPhysics(),
-            mainAxisSpacing: 11,
-            crossAxisSpacing: 11,
+            mainAxisSpacing: 10,
+            crossAxisSpacing: 10,
             childAspectRatio: 4.4,
             children: [
               for (final n in nodes)

client/lib/screens/stats_page.dart

@@ -17,7 +17,8 @@ class StatsPage extends ConsumerWidget {
     final c = context.pangolin;
     final t = ref.watch(appTextProvider);
     final maxV = _vals.reduce((a, b) => a > b ? a : b);
-    final pad = isWide ? 28.0 : 20.0;
+    // 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'),
@@ -26,20 +27,20 @@ class StatsPage extends ConsumerWidget {
     ];
 
     final body = ListView(
-      padding: EdgeInsets.fromLTRB(pad, isWide ? 6 : 0, pad, 24),
+      padding: EdgeInsets.fromLTRB(pad, isWide ? 8 : 0, pad, 24),
       children: [
         Row(children: [
           for (var i = 0; i < metrics.length; i++)
             Expanded(
               child: Padding(
-                padding: EdgeInsets.only(right: i < metrics.length - 1 ? 12 : 0),
+                padding: EdgeInsets.only(right: i < metrics.length - 1 ? 14 : 0),
                 child: _MetricCard(label: metrics[i].$1, value: metrics[i].$2, unit: metrics[i].$3),
               ),
             ),
         ]),
-        const SizedBox(height: 16),
+        const SizedBox(height: 20),
         Container(
-          padding: const EdgeInsets.all(18),
+          padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 18),
           decoration: BoxDecoration(
             color: c.surface,
             borderRadius: BorderRadius.circular(PangolinRadius.lg),
@@ -47,25 +48,29 @@ class StatsPage extends ConsumerWidget {
             boxShadow: PangolinShadow.sm,
           ),
           child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
-            Text(t.weekTraffic, style: PangolinText.sm.copyWith(color: c.fg1, fontWeight: FontWeight.w600)),
+            Text(t.weekTraffic,
+                style: PangolinText.sm.copyWith(color: c.fg1, fontWeight: FontWeight.w600, fontSize: 13)),
             const SizedBox(height: 18),
             SizedBox(
-              height: isWide ? 150 : 120,
+              // 柱最高 86 + 上下数值/星期标签两行 + 间距 ≈ 134，留余量 140 避免溢出。
+              height: 140,
               child: Row(crossAxisAlignment: CrossAxisAlignment.end, children: [
                 for (var i = 0; i < _vals.length; i++)
                   Expanded(
                     child: Column(mainAxisAlignment: MainAxisAlignment.end, children: [
-                      Text('${_vals[i]}', style: PangolinText.mono.copyWith(fontSize: 11, color: c.fg3)),
-                      const SizedBox(height: 6),
-                      Container(
-                        height: (isWide ? 104 : 84) * (_vals[i] / maxV),
-                        margin: const EdgeInsets.symmetric(horizontal: 6),
-                        decoration: BoxDecoration(
-                          color: c.accent.withOpacity(0.85),
-                          borderRadius: const BorderRadius.vertical(top: Radius.circular(6)),
+                      Text('${_vals[i]}', 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),
+                          decoration: BoxDecoration(
+                            color: c.accent.withOpacity(0.85),
+                            borderRadius: const BorderRadius.vertical(top: Radius.circular(6)),
+                          ),
                         ),
                       ),
-                      const SizedBox(height: 6),
+                      const SizedBox(height: 8),
                       Text(t.days7[i], style: PangolinText.caption.copyWith(color: c.fg3)),
                     ]),
                   ),
@@ -92,7 +97,7 @@ class _MetricCard extends StatelessWidget {
   Widget build(BuildContext context) {
     final c = context.pangolin;
     return Container(
-      padding: const EdgeInsets.all(14),
+      padding: const EdgeInsets.symmetric(horizontal: 18, vertical: 16),
       decoration: BoxDecoration(
         color: c.surface,
         borderRadius: BorderRadius.circular(PangolinRadius.lg),
@@ -101,10 +106,10 @@ class _MetricCard extends StatelessWidget {
       ),
       child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
         Text(label, overflow: TextOverflow.ellipsis, style: PangolinText.caption.copyWith(color: c.fg3, fontWeight: FontWeight.w600)),
-        const SizedBox(height: 6),
+        const SizedBox(height: 7),
         Text.rich(TextSpan(
           text: value,
-          style: PangolinText.mono.copyWith(fontSize: 20, color: c.fg1, fontWeight: FontWeight.w500),
+          style: PangolinText.mono.copyWith(fontSize: 24, color: c.fg1, fontWeight: FontWeight.w500),
           children: [TextSpan(text: ' $unit', style: PangolinText.caption.copyWith(color: c.fg3))],
         )),
       ]),

client/test/golden/desktop_pages_golden_test.dart

@@ -0,0 +1,62 @@
+// desktop_pages_golden_test.dart — desktop 整页 golden（节点/统计/账户）
+//
+// 用 debugDefaultTargetPlatformOverride=macOS + 920×600 surface 让 context.formFactor
+// 判定为 desktop，渲染 DesktopShell 各页，固化精还原成果作回归闸。
+// 连接页含连接键无限旋转动画，单独由组件级 golden 覆盖，此处不截。
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pangolin_vpn/bridge/vpn_bridge_mock.dart';
+import 'package:pangolin_vpn/bridge/vpn_bridge_provider.dart';
+import 'package:pangolin_vpn/pangolin_theme.dart';
+import 'package:pangolin_vpn/services/token_store.dart';
+import 'package:pangolin_vpn/shell/desktop_shell.dart';
+import 'package:pangolin_vpn/shell/home_shell.dart';
+import 'package:pangolin_vpn/state/auth_provider.dart';
+import 'package:pangolin_vpn/state/navigation_provider.dart';
+
+class _NullTokenStore implements TokenStore {
+  const _NullTokenStore();
+  @override
+  Future<void> saveTokens({required String access, required String refresh}) async {}
+  @override
+  Future<String?> loadAccessToken() async => null;
+  @override
+  Future<String?> loadRefreshToken() async => null;
+  @override
+  Future<void> clear() async {}
+}
+
+Future<void> _shoot(WidgetTester tester, NavView view, String name) async {
+  // 平台覆盖须在 test 体内设置并在结束前复位（否则触发 foundation 调试变量未复位断言）。
+  debugDefaultTargetPlatformOverride = TargetPlatform.macOS;
+  tester.view.physicalSize = const Size(920, 600);
+  tester.view.devicePixelRatio = 1.0;
+  addTearDown(tester.view.resetPhysicalSize);
+  addTearDown(tester.view.resetDevicePixelRatio);
+  try {
+    await tester.pumpWidget(ProviderScope(
+      overrides: [
+        tokenStoreProvider.overrideWithValue(const _NullTokenStore()),
+        vpnBridgeProvider.overrideWithValue(VpnBridgeMock()),
+        navViewProvider.overrideWith((ref) => view),
+      ],
+      child: MaterialApp(
+        debugShowCheckedModeBanner: false,
+        theme: PangolinTheme.light,
+        home: const HomeShell(),
+      ),
+    ));
+    await tester.pumpAndSettle();
+    await expectLater(find.byType(DesktopShell), matchesGoldenFile('goldens/$name.png'));
+  } finally {
+    debugDefaultTargetPlatformOverride = null;
+  }
+}
+
+void main() {
+  testWidgets('desktop 节点页', (t) => _shoot(t, NavView.servers, 'desktop_servers'));
+  testWidgets('desktop 统计页', (t) => _shoot(t, NavView.stats, 'desktop_stats'));
+  testWidgets('desktop 账户页', (t) => _shoot(t, NavView.account, 'desktop_account'));
+}