Feat/voucher docs (#664)

* feat: implement inbox document picker and linking functionality

* feat: implement self-billing invoice functionality

- Added support for registering self-billed invoices received from customers.
- Updated the invoice schema to include fields for self-billing metadata such as `is_self_billed`, `external_invoice_number`, `self_billing_agreement_ref`, and `received_date`.
- Created API route for handling self-billed invoice submissions, including validation and error handling.
- Implemented database migrations to add necessary columns and constraints for self-billing invoices.
- Developed tests to ensure correct behavior of self-billing invoice creation and validation rules.
- Updated Swedish localization files to include new terms related to self-billing.

* feat: enforce SIE import requirement for non-Fortnox providers in migration process

* feat: streamline invoice processing and enhance error logging across APIs

components/onboarding/BankIdCompanyPicker.tsx

@@ -190,28 +190,16 @@ export default function BankIdCompanyPicker({
                 const entityLabel = humanTicEntityType(role.legalEntityType)
                 const mappable = mapEntityType(role.legalEntityType) !== null
 
-                if (status === 'exists') {
-                  return (
-                    <li key={cleaned}>
-                      <div className="w-full rounded-lg border bg-muted/20 p-4 text-left opacity-70">
-                        <div className="flex items-center justify-between gap-3">
-                          <div className="min-w-0">
-                            <p className="font-medium text-sm truncate">{role.legalName}</p>
-                            <p className="text-xs text-muted-foreground mt-0.5 truncate">
-                              {cleaned} · {entityLabel}
-                            </p>
-                          </div>
-                          <span className="text-[10px] uppercase tracking-wide text-muted-foreground flex-shrink-0">
-                            {t('already_in_app', { appName: branding.appName.toLowerCase() })}
-                          </span>
-                        </div>
-                        <p className="text-xs text-muted-foreground/70 mt-2">
-                          {t('ask_admin_invite')}
-                        </p>
-                      </div>
-                    </li>
-                  )
-                }
+                // Companies already in gnubok under another account are still
+                // offered for setup — org-number reuse is allowed (a director
+                // may keep a separate test copy). Keep a muted note so the
+                // "also already in {app}" context isn't lost.
+                const existsNote =
+                  status === 'exists' ? (
+                    <p className="text-xs text-muted-foreground/70 mt-2">
+                      {t('already_in_app', { appName: branding.appName.toLowerCase() })}
+                    </p>
+                  ) : null
 
                 if (!mappable) {
                   return (
@@ -236,6 +224,7 @@ export default function BankIdCompanyPicker({
                             {t('setup_manually')}
                           </span>
                         </div>
+                        {existsNote}
                       </Link>
                     </li>
                   )
@@ -263,6 +252,7 @@ export default function BankIdCompanyPicker({
                         </div>
                         <ArrowRight className="h-4 w-4 text-muted-foreground flex-shrink-0" />
                       </div>
+                      {existsNote}
                     </button>
                   </li>
                 )

components/onboarding/Step2CompanyDetails.tsx

@@ -12,11 +12,8 @@ import { Label } from '@/components/ui/label'
 import { Loader2, ArrowRight, ArrowLeft, CheckCircle2, AlertTriangle } from 'lucide-react'
 import type { EntityType } from '@/types'
 import type { CompanyLookupResult } from '@/lib/company-lookup/types'
-import { getBranding } from '@/lib/branding/service'
 import { normalizeOrgNumber } from '@/lib/company-lookup/normalize-org-number'
 
-const branding = getBranding()
-
 const schema = z.object({
   company_name: z.string().min(1, 'Företagsnamn krävs'),
   org_number: z.string()
@@ -82,7 +79,7 @@ export default function Step2CompanyDetails({
   const [isLooking, setIsLooking] = useState(false)
   const [lookupError, setLookupError] = useState<string | null>(null)
   const [lookupDone, setLookupDone] = useState<CompanyLookupResult | null>(null)
-  const [orgNumberExists, setOrgNumberExists] = useState(false)
+  const [existingOwn, setExistingOwn] = useState<{ id: string; name: string } | null>(null)
   const abortRef = useRef<AbortController | null>(null)
   const dupAbortRef = useRef<AbortController | null>(null)
   // Tracks an orgnr that's been pre-verified (BankID CompanyRoles match) so
@@ -96,13 +93,14 @@ export default function Step2CompanyDetails({
 
   const orgNumber = watch('org_number')
 
-  // Debounced duplicate check against Accounted's own companies table. Runs in
-  // parallel with the TIC lookup — they don't conflict. On match, the submit
-  // button is disabled; the server action would also reject ('org_number_exists')
-  // but blocking client-side avoids a wasted roundtrip.
+  // Soft, account-scoped duplicate warning: if THIS user already has a
+  // (non-archived) company with the same org number, surface a non-blocking
+  // note. Org-number reuse is allowed (see lib/company/actions.ts), so this
+  // never disables submit. The endpoint is RLS-scoped to the caller's own
+  // companies, so it can't reveal or count another account's.
   useEffect(() => {
     if (!orgNumber || normalizeOrgNumber(orgNumber) === null) {
-      setOrgNumberExists(false)
+      setExistingOwn(null)
       return
     }
     const timer = setTimeout(() => {
@@ -115,10 +113,10 @@ export default function Step2CompanyDetails({
         .then(async (res) => {
           if (controller.signal.aborted || !res.ok) return
           const { data } = await res.json()
-          setOrgNumberExists(!!data?.exists)
+          setExistingOwn(data?.companies?.[0] ?? null)
         })
         .catch(() => {
-          // Network failure is non-fatal — the server action will re-check.
+          // Advisory only — never blocks creation.
         })
     }, 500)
     return () => {
@@ -267,12 +265,10 @@ export default function Step2CompanyDetails({
               {ticEnabled && lookupError && (
                 <p className="text-xs text-muted-foreground">{lookupError}</p>
               )}
-              {orgNumberExists && (
-                <div className="flex items-start gap-2 text-sm text-destructive">
-                  <AlertTriangle className="h-3.5 w-3.5 mt-0.5 flex-shrink-0" />
-                  <span>
-                    {t('step2_company_exists', { appName: branding.appName.toLowerCase() })}
-                  </span>
+              {existingOwn && (
+                <div className="flex items-start gap-2 rounded-md bg-warning/15 px-3 py-2 text-sm text-warning-foreground">
+                  <AlertTriangle className="h-4 w-4 mt-0.5 flex-shrink-0 text-warning" />
+                  <span>{t('step2_company_exists_own', { name: existingOwn.name })}</span>
                 </div>
               )}
             </div>
@@ -338,7 +334,7 @@ export default function Step2CompanyDetails({
               </Button>
               <Button
                 type="submit"
-                disabled={isSaving || orgNumberExists}
+                disabled={isSaving}
                 className="w-full sm:w-auto"
               >
                 {isSaving ? (