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

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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.

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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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