feat: 阅读页与章节预览 API；管理端内容页；book/h5_read；脚本与文档

- miniprogram: read 页与 member-detail/my；SOP 文档
- soul-api: chapter_preview、book/h5_read 调整；VIP 订单回填 SQL
- soul-admin: ContentPage、dist
- scripts: pull_from_baota；content_upload、gitignore、对话规则

Made-with: Cursor

miniprogram/pages/read/read.wxss

@@ -327,6 +327,41 @@
   margin-bottom: 48rpx;
 }
 
+.paywall-subdesc {
+  font-size: 26rpx;
+  color: rgba(255, 255, 255, 0.52);
+  text-align: center;
+  display: block;
+  margin-bottom: 36rpx;
+  line-height: 1.5;
+  padding: 0 16rpx;
+}
+
+.preview-percent-row {
+  margin: 16rpx 0 8rpx;
+  display: flex;
+  justify-content: center;
+}
+
+.preview-percent-badge {
+  font-size: 24rpx;
+  color: #00CED1;
+  border: 2rpx solid rgba(0, 206, 209, 0.35);
+  border-radius: 999rpx;
+  padding: 8rpx 24rpx;
+  background: rgba(0, 206, 209, 0.08);
+}
+
+.purchase-btn--fulltext {
+  justify-content: center;
+}
+
+.purchase-btn--fulltext .btn-label--block {
+  flex: 1;
+  text-align: center;
+  width: 100%;
+}
+
 /* ===== 购买选项 ===== */
 .purchase-options {
   display: flex;