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/components/ErrorBoundary/index.tsx

@@ -1,5 +1,6 @@
 import React, { Component } from 'react';
 import { View, Text } from '@tarojs/components';
+import './index.scss';
 
 interface Props {
   children: React.ReactNode;
@@ -30,17 +31,17 @@ export default class ErrorBoundary extends Component<Props, State> {
   render() {
     if (this.state.hasError) {
       return (
-        <View style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'center', minHeight: '60vh', padding: '40px 24px' }}>
-          <View style={{ width: '64px', height: '64px', borderRadius: '32px', background: '#F0DDD4', display: 'flex', alignItems: 'center', justifyContent: 'center', marginBottom: '20px' }}>
-            <Text style={{ fontFamily: 'Georgia, serif', fontSize: '28px', fontWeight: 600, color: '#8B3E1F' }}>!</Text>
+        <View className='error-boundary'>
+          <View className='error-icon-wrap'>
+            <Text className='error-icon-text'>!</Text>
           </View>
-          <Text style={{ fontSize: '32px', color: '#2D2A26', marginBottom: '12px', fontWeight: 600 }}>页面出了点问题</Text>
-          <Text style={{ fontSize: '24px', color: '#78716C', marginBottom: '32px' }}>请返回重试</Text>
+          <Text className='error-title'>页面出了点问题</Text>
+          <Text className='error-desc'>请返回重试</Text>
           <View
+            className='error-retry-btn'
             onClick={this.handleRetry}
-            style={{ background: '#C4623A', borderRadius: '12px', padding: '14px 48px' }}
           >
-            <Text style={{ color: '#FFFFFF', fontSize: '28px' }}>重新加载</Text>
+            <Text className='error-retry-text'>重新加载</Text>
           </View>
         </View>
       );