3 Commits (feature/betriebsmodus)

Author	SHA1	Message	Date
nexxo	6d7c2bdf35	Ask whether they are a consumer, and let one change their mind ... Three things the product owed its customers and did not have. **Who is on the other side.** There was no consumer/business flag anywhere, and `vat_id` was standing in for one — which it cannot: a business without a VAT number is an ordinary small business, and a consumer with one does not exist. It is asked at sign-up now, correctable in the portal, and NULL where nobody has been asked. Unknown is read as CONSUMER everywhere it decides a right, because that mistake costs us a refund while the other one takes a statutory right away from somebody who has it. Reverse charge asks the recorded type instead of the number: an explicit consumer is charged the domestic rate whatever `vat_id` says — previously they were not, and anyone could zero their own VAT by getting a number verified. An unrecorded type still falls back to the verified number, so no contract that is already running changes rate. **The fourteen-day right of withdrawal** (FAGG, §312g BGB), for consumers only, at every door: the window is stamped on the contract when it is concluded, the customer exercises it from the portal, an operator records one that arrived by telephone or post, and both go through one action that refuses a business customer on the server rather than by hiding a card. The money follows the paperwork rather than being computed beside it. The invoice is cancelled by a Storno with its own gapless number — nothing is ever edited or deleted — a new invoice states the pro-rata value of the service actually delivered (FAGG §16, by days over the term paid for), and the refund is exactly the difference between the two documents. Where the consumer never expressly asked for the service to begin at once, they owe nothing and the whole amount goes back. `StripeClient::refund()` is new, keyed so a retry cannot send the money twice. The service ends through EndInstanceService and the `cancellation_scheduled` machinery that was already there. **The cancel button for modules.** BookAddon::cancelAtPeriodEnd() had no caller in the interface at all, so a customer could book a recurring charge in two clicks and had no way to stop it. It is on the module card now, with the date it runs until and a way back while the cancellation is still pending — and putting a module back settles nothing, because the term it was cancelled for was paid for in advance. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-07-29 21:06:06 +02:00
nexxo	0560ae743d	feat(billing): Stripe owns the billing cycle, we own capability ... A Product per plan family and a Price per priced row of a published version, plus the four subscribed webhook events that were arriving and being ignored. `stripe:sync-catalogue` mirrors the catalogue. Idempotent twice over: a stored id is skipped, and each call carries an idempotency key derived from our own row, so a crash between Stripe creating a Price and us recording its id gives back the same object rather than a second one. That matters more here than usual — a Stripe Price cannot be edited or deleted, so a duplicate is permanent. Drafts are not synced at all: a version that has promised nothing has no business in a price list. --dry-run shows what would be created. The webhook now handles invoice.paid, invoice.payment_failed, customer.subscription.updated and customer.subscription.deleted. It never re-derives an amount: the invoice is the authority for what was charged, and recomputing it from our catalogue would produce a second, disagreeing answer. A failed payment is recorded and nothing else — Stripe runs the dunning schedule, and cutting a customer off on the first failure would punish an expired card as though it were a refusal to pay. Only a cycle renewal moves the term on. Stripe also sends paid invoices for prorations and manual charges, and the checkout's own invoice — which is already in the register as the purchase, and would otherwise double every customer's first payment. Stripe does not guarantee delivery order, which is the source of most of the care here: - state changes are judged and written in one transaction with the row held, so two deliveries cannot both pass a check made on a stale copy; - an older event never overwrites a newer one, with a rank breaking ties between events sharing a second — their timestamps have one-second resolution, and a failed attempt and its successful retry routinely do; - a term is never shortened, and an ended contract is never revived; - an event for a contract that does not exist yet is HELD and replayed the moment it appears, rather than acknowledged and forgotten. A cancellation dropped that way would leave us serving someone who had already left. Held rows that never match are pruned after a week. Register entries are keyed by what they are about — the invoice, the attempt, the subscription — with a unique index doing the work, because a check two concurrent deliveries can both pass is not idempotency. PlanChange is now documented as the preview shown before someone confirms, not the invoice: Stripe's proration accounts for tax, existing credit and the exact second the change lands, and ours cannot. Not run against the live account — `stripe:sync-catalogue` creates objects that cannot be deleted, so that is the owner's call. The dry run lists 12. 457 tests green. Codex review clean after seven rounds. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-07-26 13:36:28 +02:00
nexxo	7582df3de6	feat(billing): a proof register, and modules frozen at their booked price ... Two things the contract could not answer on its own: what happened, and what the customer's whole bill is. `subscription_records` is append-only, one row per commercial event. Flat columns for everything searched or relied on as evidence — event, customer, subscription, plan family and version, term, net/tax/gross, currency, tax rate, reverse charge, Stripe ids — PLUS a versioned JSON copy of the whole snapshot. Not JSON alone: you cannot query it, and "the amount is in there somewhere" is poor evidence. Copied, not joined, so a row still answers after the customer, the plan or the version have gone. The flat columns describe the TRANSACTION. Gross is what was actually taken; net and tax are that gross split by the rate that applied on the day. A discount lowers the taxable amount rather than creating negative VAT, and a free checkout is recorded as free instead of as paid in full. What was agreed sits beside it in the snapshot, so a charge that differs from the catalogue is preserved as a question rather than reconciled away. The register refuses to be rewritten, in bulk as well as one row at a time — model events do not fire for `query()->update()`, which is exactly the shape a careless data fix takes. `subscription_addons` carries the owner's rule: a customer's total is their subscription plus their modules, and all of it is frozen at what was agreed. Price protection covering only the plan would let a module quietly double for someone who booked it two years ago. A module they have NOT booked is a sale still to be made, at today's price — so the catalogue is consulted only for what is not in this table. Several bookings of one module are summed rather than reduced to one arbitrary row, or the page and the bill would disagree. Concurrency: one order books one module, enforced by a unique index rather than a lookup two retries can both pass; cancellation is an atomic claim; and each booking commits with its own register entry, so a failure cannot leave a sale without evidence and a retry that finds the booking cannot skip the event. Verified in the browser: with the module raised from 29,00 € to 59,00 € in the catalogue, the customer who booked it still sees 29,00 € and a total of 208,00 €, while a new customer is quoted 59,00 €. 436 tests green. Codex review clean after seven rounds. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-07-26 13:07:34 +02:00