feat: deliver V1.1 dual-client UI fidelity milestone

miniapp/pages/anti-fraud/anti-fraud.wxml

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+<view class="service-page"><view class="hero"><text class="eyebrow">婚恋反诈中心</text><text class="hero-title">真诚交往，也要守住安全边界</text><text class="hero-desc">平台不会以任何理由要求转账、投资或提供银行卡密码。</text></view><view class="content"><view class="block"><text class="block-title">常见风险信号</text><view class="card danger-card"><view wx:for="{{warnings}}" wx:key="*this" class="feature-row"><view class="feature-icon">!</view><view class="feature-copy"><text class="feature-title">{{item}}</text><text class="feature-desc">遇到异常请停止转账并保存相关记录</text></view></view></view></view><view class="block"><text class="block-title">遇到可疑情况怎么办</text><view class="card"><view class="feature-row"><view class="feature-icon">1</view><view class="feature-copy"><text class="feature-title">停止资金操作</text><text class="feature-desc">不要继续转账、充值或提供验证码</text></view></view><view class="feature-row"><view class="feature-icon">2</view><view class="feature-copy"><text class="feature-title">保存相关证据</text><text class="feature-desc">保留聊天、付款与账号信息</text></view></view><view class="feature-row"><view class="feature-icon">3</view><view class="feature-copy"><text class="feature-title">及时举报或报警</text><text class="feature-desc">紧急情况请直接拨打 110</text></view></view></view></view></view><view class="fixed-action"><view class="primary-btn" bindtap="report">举报可疑行为</view></view></view>