fix: 修复界面显示问题，优化文案

🎨 界面修复:
- 修复章节列表锁图标和标题错位（用简单符号替代emoji）
- 修复匹配页今日剩余图标和文字对齐
- 删除匹配页底部'每天3次免费匹配'提示

✏️ 文案优化:
- '分享赚钱' → '立即推广'
- '分享给好友' → '推荐好友，共同成长'
- '好友购买你获得90%佣金' → '邀请好友加入，享90%推广收益'

📄 文档更新:
- 更新需求方案文档v1.1
- 添加上线检查清单
- 完善API接口文档

miniprogram/pages/chapters/chapters.wxml

@@ -67,19 +67,14 @@
                 <block wx:for="{{chapter.sections}}" wx:key="id" wx:for-item="section">
                   <view class="section-item" bindtap="goToRead" data-id="{{section.id}}">
                     <view class="section-left">
-                      <view class="section-icon {{section.isFree || hasFullBook || purchasedSections.indexOf(section.id) > -1 ? 'icon-unlocked' : 'icon-locked'}}">
-                        <text wx:if="{{section.isFree || hasFullBook || purchasedSections.indexOf(section.id) > -1}}">🔓</text>
-                        <text wx:else>🔒</text>
-                      </view>
-                      <text class="section-title {{section.isFree || hasFullBook || purchasedSections.indexOf(section.id) > -1 ? '' : 'text-muted'}}">
-                        {{section.id}} {{section.title}}
-                      </text>
+                      <text class="section-lock {{section.isFree || hasFullBook || purchasedSections.indexOf(section.id) > -1 ? 'lock-open' : 'lock-closed'}}">{{section.isFree || hasFullBook || purchasedSections.indexOf(section.id) > -1 ? '○' : '●'}}</text>
+                      <text class="section-title {{section.isFree || hasFullBook || purchasedSections.indexOf(section.id) > -1 ? '' : 'text-muted'}}">{{section.id}} {{section.title}}</text>
                     </view>
                     <view class="section-right">
                       <text wx:if="{{section.isFree}}" class="tag tag-free">免费</text>
-                      <text wx:elif="{{hasFullBook || purchasedSections.indexOf(section.id) > -1}}" class="text-brand text-xs">已购</text>
-                      <text wx:else class="text-muted text-xs">¥{{section.price}}</text>
-                      <text class="section-arrow">→</text>
+                      <text wx:elif="{{hasFullBook || purchasedSections.indexOf(section.id) > -1}}" class="tag tag-purchased">已购</text>
+                      <text wx:else class="section-price">¥{{section.price}}</text>
+                      <text class="section-arrow">›</text>
                     </view>
                   </view>
                 </block>