/claim #1

Summary

• replace the stub payment service with a real Stripe paymentIntents.create() flow driven by STRIPE_SECRET_KEY
• validate amount, currency, and optional metadata before calling Stripe, and surface the resulting error messages through the payments API
• add unit tests for the mocked Stripe client, an API test for validation errors, and an env-guarded smoke test for live test-mode PaymentIntent creation

Validation

• npm test -w apps/api
• git diff --check

Demo

• short demo video: demos/stripe-payment-intent-demo.webm

Smoke Test

• Added apps/api/src/tests/paymentService.smoke.test.js
• Run with RUN_STRIPE_SMOKE_TEST=1 STRIPE_SECRET_KEY=... npm test -w apps/api
• Not executed in this environment because no Stripe test secret is available here