Tenant-admin UI för fakturering

All six views share admin/src/lib/billing-api.ts as the single typed client into /tenants/{id}/billing-profile, /invoices, /payments, /admin/bank/* and craft-easy-/jobs/*. It exposes typed entities (BillingProfile, Invoice, Payment, UnmatchedTransfer, JobRun), helper functions (formatMoney, invoiceStatusLabel, INVOICE_STATUSES), a multi-status fan-out helper that issues one request per selected status and de-duplicates per id, and ApiError pass-through for consistent error rendering. BillingProfileView edits the tenant singleton through GET and PUT /tenants/{id}/billing-profile: dunning stages render as an editable table with add, remove and reorder; languages as a chip multi-select with the default locked into the supported list; conditional late-fee fields per policy; a Preview button posts to /dunning-stages/preview for a dry run.

Client-side validators mirror the backend pydantic rules so users never round-trip a guaranteed-failure save. InvoiceList consumes /invoices/?status=... with multi-status chip filter (parallel fan-out plus de-dup when multiple statuses are picked), Load 50 more pagination, sortable columns (Number, Debtor, Issued, Due, Total, Status) and status-coloured pill badges. InvoiceDetail renders the full invoice: header with status badge, info cards (issuer, debtor, ECB reference rate, OCR), line items, a payments list (parallel GET /payments/?invoice_id=), the status_history timeline and conditional actions (PATCH /send, POST /send-reminder, PATCH /cancel) — the PDF link opens through Linking.openURL.

PaymentList consumes /payments/?status= with a radio filter (all, completed, pending, failed, refunded, cancelled), pagination, and row-click navigation to the parent invoice. UnmatchedTransfersView (platform-admin only) consumes /admin/bank/unmatched, supports an include-resolved toggle, and offers row actions through a modal: Match by invoice id (POST .../match?invoice_id=) or Ignore with mandatory reason (POST .../ignore), with badges UNRESOLVED, MATCHED, IGNORED. JobsAdmin (platform-admin only) renders a card grid of every job in /jobs/registry with History filter and Run now buttons, plus a body table of the latest 100 /jobs/runs entries (manual-trigger marker, runtime in seconds, status-coloured badge and 2-line error message).

Navigation adds a Fakturering sidebar section between Ekonomi and Innehall with five links — three tenant-scoped, two gated by a new requiresPlatformAdmin flag on NavItem — applied in both visibleSectionsFor() and the Cmd+K command palette. The requirePlatformAdmin HOC at admin/src/auth/platform-admin.tsx fetches GET /session/me and allows scope === platform_admin, role === platform_admin or is_system_user, otherwise rendering a 403 panel; usePlatformAdmin is the hook variant for non-blocking conditional UI such as the hidden sidebar links and command-palette indexing. Backend authority is independent — the HOC is purely cosmetic.