Backend request/response structs used camelCase JSON tags while the
rest of the codebase uses snake_case (from Ent ORM entities). This
caused field name mismatches — notably the admin refund deduct_balance
field was silently ignored.
Backend: changed all camelCase JSON tags in payment handler/service
structs to snake_case (CreateOrderRequest, CreateOrderResponse,
CreatePlanRequest, UpdatePlanRequest, CreateProviderInstanceRequest,
UpdateProviderInstanceRequest, AdminProcessRefundRequest, RefundResult).
Frontend: updated all API call payloads and response field accesses
to use snake_case, removed manual camelCase conversion in
buildPlanPayload, toggleForSale, provider dialog emit, etc.
- Fix CreateOrderRequest field name mismatch (payment_type → paymentType)
- Payment page now discovers available types from providers (not global config)
- Backend GetLimits returns map keyed by payment type
- EasyPay shows 3 buttons (跳转/支付宝/微信), Stripe shows card/alipay/wxpay/link
- Auto-select first method after limits loaded
- payment_service: split GetDashboardStats (131→35 lines) into 4 sub-functions,
extract applyPagination helper, replace bubble sort with sort.Slice,
use sync.Once for EnsureProviders, define magic number constants
- providers: merge duplicate PC/Mobile functions in alipay/wxpay,
extract loadKeyPair/queryOrderTotalFen in wxpay, add centsToYuan in stripe,
define constants for success codes, currencies, event types
- handlers: extract requireAuth and parseIDParam helpers to eliminate
repeated auth/ID-parsing boilerplate
- registry: remove dead seen map in GetProviderByKey
- types: centralize order status constants in payment package
- load_balancer+config_service: unify duplicated containsType into
exported InstanceSupportsType function
erio