fix(mp): T40 UI 设计系统合规审计修复 — 60 页面全覆盖

- 新增 $white 语义变量 + --tk-font-display Token
- 44 处 #fff → $white，2 处 background: #fff → $card
- 14 处 border-radius 硬编码统一为 $r-xs/$r-lg/$r
- 3 处 TSX inline 颜色提取为 SCSS 类（exchange/orders/action-inbox）
- ErrorBoundary 重构：6 个 inline style → SCSS 类 + Design Token
- 2 处离调色板颜色修正（#0284C7→$tx2, #94A3B8→$tx3）
- 2 处静默 catch 块添加状态清理（article/health）
- 趋势页补 Loading/EmptyState；咨询页 GuestGuard 统一
- 4 处 #FFFFFF → $white（mixins/index/exchange/variables）

apps/miniprogram/src/pages/consultation/index.tsx

@@ -1,8 +1,10 @@
 import { useState, useRef } from 'react';
 import { View, Text } from '@tarojs/components';
 import Taro, { useDidShow, usePullDownRefresh, useReachBottom } from '@tarojs/taro';
+import { useAuthStore } from '@/stores/auth';
 import { listConsultations, ConsultationSession } from '@/services/consultation';
 import Loading from '../../components/Loading';
+import GuestGuard from '../../components/GuestGuard';
 import { useElderClass } from '../../hooks/useElderClass';
 import './index.scss';
 
@@ -31,6 +33,7 @@ function formatTime(iso: string): string {
 }
 
 export default function Consultation() {
+  const user = useAuthStore((s) => s.user);
   const [sessions, setSessions] = useState<ConsultationSession[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState('');
@@ -67,6 +70,7 @@ export default function Consultation() {
 
   useDidShow(() => {
     Taro.setNavigationBarTitle({ title: '在线咨询' });
+    if (!user) return;
     loadSessions(1, true);
   });
 
@@ -88,6 +92,9 @@ export default function Consultation() {
 
   return (
     <View className={`consultation-page ${modeClass}`}>
+      {!user ? (
+        <GuestGuard title='请先登录' desc='登录后即可与医生在线交流' />
+      ) : (
       <View className='consultation-body'>
         {/* 副标题 */}
         <Text className='consultation-subtitle'>随时随地，连接专业医生</Text>
@@ -165,6 +172,7 @@ export default function Consultation() {
           </View>
         )}
       </View>
+      )}
     </View>
   );
 }