优化小程序阅读页面逻辑，动态更新章节价格和免费状态，确保用户体验流畅。移除硬编码价格，支持通过接口返回的值进行展示。更新用户地址管理逻辑，简化获取地址的流程，提升代码可读性。

soul-api/internal/handler/user.go

@@ -85,7 +85,7 @@ func UserAddressesByID(c *gin.Context) {
 			return
 		}
 		full := r.Province + r.City + r.District + r.Detail
-		c.JSON(http.StatusOK, gin.H{"success": true, "item": gin.H{
+		c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{
 			"id": r.ID, "userId": r.UserID, "name": r.Name, "phone": r.Phone,
 			"province": r.Province, "city": r.City, "district": r.District, "detail": r.Detail,
 			"isDefault": r.IsDefault, "fullAddress": full, "createdAt": r.CreatedAt, "updatedAt": r.UpdatedAt,