docs(api): correct /docs/api against the v1 implementation (#999)

Audited every endpoint, param, header, request/response field, error code, and
webhook event in the public API docs against the v1 implementation and fixed the
drift; addressed two rounds of CodeRabbit review.

- Error envelope, idempotency, dry-run, and reversal-field corrections.
- Registered the missing articles/dimensions/inbox-items reference resources.
- Cookbook fixes: removed nonexistent endpoints, corrected params/fields, fixed
  the test-key vs live-key quickstart flow and the year-end lock/close sequence.
- Webhooks/changelog: retry window ~87h (incl. route metadata), shipped-vs-
  coming-soon, counts, API-key format, previous_attributes.
- export-docs-to-website.mts absolutises app-served links for the website.

The gnubok-website side is on branch docs/api-correctness (already deployed).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

lib/docs/content/reference.ts

@@ -35,6 +35,7 @@ const RESOURCES: ResourceGroup[] = [
   { slug: 'companies', label: 'Companies', description: 'List and read companies the API key can access.', matcher: (p) => /\/companies(?:\/:companyId)?$/.test(p) },
   { slug: 'customers', label: 'Customers', description: 'CRM-side: who you invoice. Business and individual (sole-trader) customers with VIES validation.', matcher: (p) => /\/customers(\/|$)/.test(p) },
   { slug: 'invoices', label: 'Invoices', description: 'Outbound invoicing: draft, send, mark paid, credit, PDF download. Mixed-rate VAT supported.', matcher: (p) => /\/invoices(\/|$)/.test(p) },
+  { slug: 'articles', label: 'Articles', description: 'Read the article/product catalogue used to build invoice line items.', matcher: (p) => /\/articles(\/|$)/.test(p) },
   { slug: 'suppliers', label: 'Suppliers', description: 'AP-side counterparties. Mirrors customers on the supplier vertical.', matcher: (p) => /\/suppliers(\/|$)/.test(p) },
   { slug: 'supplier-invoices', label: 'Supplier invoices', description: 'AP lifecycle: register, approve, mark paid, credit. With ROT/RUT and reverse-charge support.', matcher: (p) => /\/supplier-invoices(\/|$)/.test(p) },
   { slug: 'transactions', label: 'Transactions', description: 'Bank transactions: ingest, categorise, match to invoices, reconcile.', matcher: (p) => /\/transactions(\/|$)/.test(p) },
@@ -44,10 +45,12 @@ const RESOURCES: ResourceGroup[] = [
   { slug: 'fiscal-periods', label: 'Fiscal periods', description: 'Period lifecycle: lock, close, year-end, opening balances, FX revaluation. Async via the operations substrate.', matcher: (p) => /\/fiscal-periods(\/|$)/.test(p) },
   { slug: 'accounts', label: 'Accounts', description: 'Read the chart of accounts (BAS).', matcher: (p) => /\/accounts(\/|$)/.test(p) },
   { slug: 'documents', label: 'Documents', description: 'Multipart upload, signed-URL download (15-min TTL), link to journal entries.', matcher: (p) => /\/documents(\/|$)/.test(p) },
+  { slug: 'inbox-items', label: 'Inbox items', description: 'Stamp incoming documents in the inbox to turn them into supplier invoices or transactions.', matcher: (p) => /\/inbox-items(\/|$)/.test(p) },
+  { slug: 'dimensions', label: 'Dimensions', description: 'Cost-centre / project dimensions and their values for tagging journal lines.', matcher: (p) => /\/dimensions(\/|$)/.test(p) },
   { slug: 'employees', label: 'Employees', description: 'Payroll roster: CRUD with personnummer masking on list endpoints.', matcher: (p) => /\/employees(\/|$)/.test(p) },
   { slug: 'salary-runs', label: 'Salary runs', description: 'Payroll lifecycle: create, calculate, approve, mark paid, book, generate AGI XML.', matcher: (p) => /\/salary-runs(\/|$)/.test(p) },
   { slug: 'reports', label: 'Reports', description: 'Read-only reports: trial balance, P&L, balance sheet, GL, VAT, salary journal, SIE export, +9 more.', matcher: (p) => /\/reports(\/|$)/.test(p) },
-  { slug: 'imports', label: 'Imports', description: 'Bulk async ingest: SIE files (Fortnox/Visma/BL/SpeedLedger/Bokio migrations) and bank statements (11 formats).', matcher: (p) => /\/imports(\/|$)/.test(p) },
+  { slug: 'imports', label: 'Imports', description: 'Bulk async ingest: SIE files (Fortnox/Visma/BL/SpeedLedger/Bokio migrations) and bank statements (12 formats).', matcher: (p) => /\/imports(\/|$)/.test(p) },
   { slug: 'compliance', label: 'Compliance check', description: 'Pre-flight verification: voucher gaps, year-end readiness, before submitting to Skatteverket.', matcher: (p) => /\/compliance(\/|$)/.test(p) },
   { slug: 'webhooks', label: 'Webhooks', description: 'Subscribe to events with HMAC-signed delivery, exponential retries, and dead-letter replay.', matcher: (p) => /\/webhooks|\/webhook-deliveries/.test(p) },
   { slug: 'operations', label: 'Operations', description: 'Poll long-running async operations (year-end closing, imports, currency revaluation).', matcher: (p) => /\/operations(\/|$)/.test(p) },