feat(supplier-invoices): Inlagd i banken mark for payments entered by hand (#2220) (#2356)

A user who types payments into the internet bank instead of uploading a
betalfil had no way to see which invoices were already handled. Adds a
nullable supplier_invoices.bank_entered_at, a POST
/api/supplier-invoices/{id}/bank-entered route, a labelled checkbox on
the list (trailing slot, once attested) and on the detail header, and a
BEFORE UPDATE trigger that clears the mark when a payment lands, so
every payment path (mark-paid, bank match, v1, MCP) retires it without
knowing it exists. Markera som betald stays a separate action.


Claude-Session: https://claude.ai/code/session_01LvMaHcTnwAfxzgYD1fGYX1

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

lib/api/schemas.ts

@@ -1397,6 +1397,16 @@ export const MarkSupplierInvoicePaidSchema = z.object({
   })).min(2).optional(),
 })
 
+/**
+ * "Inlagd i banken" (#2220): a boolean mark, not a payment. `entered: true`
+ * records that the user typed the payment into the bank by hand; `false`
+ * takes the mark back. No amount, no date: the payment itself is still
+ * recorded by mark-paid or the bank match, which also clears the mark.
+ */
+export const SupplierInvoiceBankEnteredSchema = z.object({
+  entered: z.boolean(),
+})
+
 export const UpdateSupplierInvoiceSchema = z.object({
   supplier_invoice_number: z.string().min(1).optional(),
   invoice_date: isoDate.optional(),