feat(client): 登录/注册页照原型重建，ds 真相源组件族统一全部屏

- 登录/注册（login.html/register.html 1:1）：两栏卡片+品牌渐变面板+主题小衣服
  pill（onSurface 变体）+记住我（记录并预填最近账号）+原型式 toast 校验；
  登录 fidelity 1.4–2.1% 三主题全绿；注册暂不入闸（少 门店编号/兑换券 字段，
  已记 CONTRACT，screens.mjs 留存根）
- ds 原子补齐：DsToast（.toast 单例）/DsCheck（.check/.agree）/DsButton lg 档/
  DsSelect 替换全部旧 DropdownButton/DsField label 在上/DsInput 后缀与密码形态
- 全屏统一：对话框按钮全 DsButton、盒式输入主题钉死（visualDensity.standard、
  h38、InputDecorationTheme 渗漏修复）、图标全 lucide、JetBrains Mono 三端同源、
  BrandMark 真相源 logo、只读模式写操作全量守卫（WriteGuard+DsToast）
- 出入库列表：版式对齐原型（卡片对齐+搜索框居中）、KPI 近30天滚动、结清后
  失效财务应收应付表；商品编辑抽屉介绍库改搜索下拉、图片双击全屏预览
- 删除旧 UI 死代码：DataTableCard/FormDialog/PageScaffold/SearchChip/
  SelectProductDialog/tabStateProvider
- golden/fidelity：stock-in/out 补注册（9%）、login 入册（8%）、goldens 全量重打；
  修复 pubspec flutter_web_plugins 非法声明（CI pub get 阻断）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JJ1g8XV1YhhmHRzhwWEW7o

client/lib/widgets/app_status_bar.dart

@@ -1,3 +1,4 @@
+import 'package:lucide_icons_flutter/lucide_icons.dart';
 import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
@@ -36,8 +37,8 @@ class _AppStatusBarState extends ConsumerState<AppStatusBar> {
     if (AppStatusBar.ticking) {
       _timer = Timer.periodic(const Duration(seconds: 1), (_) {
         if (mounted) {
-          setState(() =>
-              _now = DateFormat('HH:mm:ss').format(AppStatusBar.clock()));
+          setState(
+              () => _now = DateFormat('HH:mm:ss').format(AppStatusBar.clock()));
         }
       });
     }
@@ -63,26 +64,26 @@ class _AppStatusBarState extends ConsumerState<AppStatusBar> {
       child: Row(
         children: [
           // 左组
-          _item(icon: Icons.storefront_outlined, strong: user?.shopNo ?? '—'),
+          _item(icon: LucideIcons.store, strong: user?.shopNo ?? '—'),
           _div(),
           _item(
-              icon: Icons.person_outline,
+              icon: LucideIcons.user,
               text: (user == null || user.realName.isEmpty)
                   ? (user?.username ?? '—')
                   : user.realName),
           _div(),
-          _item(icon: Icons.login, text: '登录 ', strong: widget.loginTime),
+          _item(icon: LucideIcons.logIn, text: '登录 ', strong: widget.loginTime),
           _div(),
-          _item(icon: Icons.schedule, text: '当前 ', strong: _now),
+          _item(icon: LucideIcons.clock, text: '当前 ', strong: _now),
           const Spacer(),
           // 右组
           _item(
-            icon: isOnline ? Icons.cloud_done_outlined : Icons.cloud_off_outlined,
+            icon: isOnline ? LucideIcons.cloudCheck : LucideIcons.cloudOff,
             text: isOnline ? '已连接' : '连接已断开',
             ok: isOnline,
           ),
           _div(),
-          _item(icon: Icons.sell_outlined, strong: version, ok: true),
+          _item(icon: LucideIcons.tags, strong: version, ok: true),
           _div(),
           _licenseItem(lic),
         ],
@@ -132,7 +133,7 @@ class _AppStatusBarState extends ConsumerState<AppStatusBar> {
 
   Widget _licenseItem(LicenseInfo? lic) {
     if (lic == null) {
-      return _item(icon: Icons.verified_user_outlined, text: '授权', ok: true);
+      return _item(icon: LucideIcons.shieldCheck, text: '授权', ok: true);
     }
     final color = LicenseCopy.phaseColor(lic.phase);
     final icon = LicenseCopy.phaseIcon(lic.phase);
@@ -146,8 +147,7 @@ class _AppStatusBarState extends ConsumerState<AppStatusBar> {
       child: Row(
         mainAxisSize: MainAxisSize.min,
         children: [
-          Icon(icon,
-              size: 13, color: normal ? AppChrome.statusbarOk : color),
+          Icon(icon, size: 13, color: normal ? AppChrome.statusbarOk : color),
           const SizedBox(width: 6),
           Text(
             text,