Allison f1a5ad565f feat(billing): B-2.7 Stripe Checkout 3 plans CAD/TVQ + Apple/Google Pay ...

Adds the customer-facing checkout flow under /checkout/<plan>:
- src/billing/plans.py — Plan dataclass + 3 plans (DictIA 8 / 16 / Cloud),
  monthly + yearly Price IDs resolved from STRIPE_DICTIA_*_{SETUP,MONTHLY,YEARLY} env.
- src/billing/stripe_client.py — lazy stripe.api_key init, get_or_create_customer
  (persists user.stripe_customer_id), create_checkout_session with mode=subscription,
  currency=cad, automatic_tax=true (TPS 5% + TVQ 9.975%), billing_address_collection,
  metadata on both Session and Subscription for the B-2.8 webhook.
- src/billing/routes.py — GET /checkout/<plan>?period=monthly|yearly returns 303
  redirect to Stripe-hosted Checkout. Friendly French flash + redirect to /tarifs
  on unknown plan, missing STRIPE_SECRET_KEY, missing Price IDs, or Stripe API error.
  GET /checkout/success and /checkout/cancel render brand-tokenized templates that
  extend marketing/base.html.
- templates/billing/{success,cancel}.html — explicit "activé sous quelques minutes"
  note (webhook is async), aucun montant prélevé reassurance on cancel.
- config/env.stripe.example — env vars + Stripe Dashboard setup checklist
  (CAD activation, Stripe Tax registrations, Apple/Google Pay enable, webhook).
- tests/test_stripe_checkout.py — 25 tests covering plans, stripe_client, routes,
  and the _PUBLIC_INDEXABLE_ENDPOINTS integration. Stripe SDK mocked via
  unittest.mock.patch (no network). Windows manual driver included.

Webhook (B-2.8) will be the source of truth for user.subscription_status.
This task only mutates user.stripe_customer_id (identity, not state).
Existing pricing CTAs in templates/marketing/_partials/_pricing_tiers.html
already link to /checkout/<slug> (verified) — no marketing template touched.

Tests: 25/25 new + 89/89 prior pass on Windows manual driver.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-04-28 08:26:13 -04:00

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