- Delete payment_channels table and PaymentChannel Ent schema - Add `features` column to upstream channels table (migration 095) - Add Features field to Channel struct, input types, handler request/response - Payment user/admin handlers now use ChannelService directly - Remove Channel CRUD from PaymentConfigService and admin payment routes - Remove "渠道管理" tab from admin orders page (use /admin/channels)
Add a full payment and subscription system supporting EasyPay (Alipay/WeChat), Stripe, and direct Alipay/WeChat Pay providers with multi-instance load balancing.
