添加支付宝和微信充值功能，重构交易处理逻辑，优化资源创建与支付链接生成

scripts/sql/init.sql

@@ -706,6 +706,7 @@ create table trade (
     payment    decimal(12, 2) not null default 0,
     method     int            not null,
     status     int            not null default 0,
+    pay_url    text,
     paid_at    timestamp,
     cancel_at  timestamp,
     created_at timestamp               default current_timestamp,
@@ -731,6 +732,7 @@ comment on column trade.amount is '订单总金额';
 comment on column trade.payment is '支付金额';
 comment on column trade.method is '支付方式：1-支付宝，2-微信';
 comment on column trade.status is '订单状态：0-待支付，1-已支付，2-已取消，3-已退款';
+comment on column trade.pay_url is '支付链接';
 comment on column trade.paid_at is '支付时间';
 comment on column trade.cancel_at is '取消时间';
 comment on column trade.created_at is '创建时间';