EFT/Havale was retired; Stripe is now the sole payment method. Remove the
EFT code surface (shared PaymentMethod "eft" + EftPaymentInput + eftReceiptUrl,
EFT_RECEIPT_REQUIRED error code, billing UI receipt/filter/label paths,
payments.service eft read paths). DB columns (eft_receipt_url, bank_account_id,
bank_accounts) are kept and marked @deprecated to preserve historical records
and avoid a destructive migration — same pattern as the retired iyzico column.
Faz 3 conversion lever: set locale "tr" on the Stripe Checkout session. The
audience is Turkish B2B and ~60% of sessions reached the foreign-language
hosted page but never started a payment intent (pure abandonment, not decline).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reward engine:
- Recurring milestones (every 3 → +7d, every 5 → +14d) instead of one-time
tiers capped at 5; idempotent + transactional grants serialised per
referrer so concurrent qualifications can't double-count.
- Rewards now gated on the referred user's email verification
(afterEmailVerification hook); already-verified referees (OAuth) qualify
at apply time.
- Reward days banked as users.referral_credit_days when the referrer has no
live subscription, consumed on next trial start / activation (no more
silently lost rewards).
- Accurate cumulative rewardDays in stats; getMyReferrals returns referee
name/masked email/status.
Hardening / cleanup:
- onConflictDoNothing makes apply idempotent (no unhandled unique violation).
- Anti-fraud: normalizeEmail blocks self-referral via gmail dot/+tag aliases.
- Collision-safe referral code generation at signup.
- Single apply path (welcome onboarding modal); removed duplicate calls in
register + subscription pages. Input validation on the apply code.
Email verification UX:
- Verification link now lands on a dedicated /email-verified confirmation
page instead of the deep-linked VIN/search page.
Schema: referrals.status + qualified_at, users.referral_credit_days (0009).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
