refactor: replace direct WeChat/Alipay with unified pay-api gateway

Switch from direct WeChat Pay / Alipay integrations to the unified
宇之然 pay-api gateway (HMAC-SHA256 auth). Removes wechat_pay.py,
keeps PaymentGateway abstraction, adds UnifiedPayService. Simplifies
payment.py create_order to {plan, pay_type} params. Single webhook
endpoint replaces separate WeChat/Alipay notify handlers.
This commit is contained in:
TradeMate Dev
2026-05-29 18:36:50 +08:00
parent 5d2bced39f
commit 3e39cf0170
34 changed files with 973 additions and 424 deletions
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