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feat: credit-based billing system

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- New DB models: credit_packages, subscription_plans, user_credits, credit_consumptions, credit_purchases
- CreditService: balance, deduct, add_credits, grant_free_trial, history
- User API: /api/v1/credits/* (balance/history/packages/purchase/subscribe)
- Admin API: /api/v1/admin/credit-* (CRUD packages/plans, user credits, consumptions)
- PaymentService.create_credit_order + handle_callback for credit purchases
- Credit deduction on: discovery, translate, marketing, ai_chat, followup
- Free trial 30 credits on registration
- Documentation: docs/CREDIT_SYSTEM.md
This commit is contained in:
TradeMate Dev
2026-06-12 10:39:45 +08:00
parent 5d895ae12c
commit 2a107a42f3
21 changed files with 1528 additions and 33 deletions
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backend/alembic/versions/add_performance_indexes.py
+1 -1
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@@ -12,7 +12,7 @@ import sqlalchemy as sa
# revision identifiers, used by Alembic.
revision = 'add_perf_indexes'
down_revision = 'add_payment_transactions_table'
down_revision = 'add_payment_transactions'
branch_labels = None
depends_on = None