refactor: consolidate AI analyzers into shared lib/ai module and add journal entry reversal columns

Extract shared vision/document analysis logic into lib/ai (vision-client, document-analyzer,
image preprocessing, validation helpers), simplifying invoice-analyzer, receipt-analyzer, and
document classifier. Add migration 046 for journal entry reversal/correction link columns
(reversed_by_id, reverses_id, correction_of_id) required by storno service. Update extension
components and shared UI.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

components/extensions/ExtensionWorkspaceLoader.tsx

@@ -24,8 +24,8 @@ export default function ExtensionWorkspaceLoader({
         <WorkspaceComponent userId={userId} />
       ) : (
         <EmptyExtensionState
-          title="Kommer snart"
-          description={`${definition.name} \u00e4r under utveckling och kommer snart att vara tillg\u00e4ngligt.`}
+          title="Bakgrundstjänst"
+          description={`${definition.name} körs i bakgrunden och har ingen egen vy. Du kan hantera inställningar under Inställningar.`}
         />
       )}
     </ExtensionWorkspaceShell>

components/extensions/ExtensionWorkspaceShell.tsx

@@ -20,7 +20,7 @@ export default function ExtensionWorkspaceShell({
       {/* Breadcrumb */}
       <nav className="flex items-center gap-1.5 text-sm text-muted-foreground mb-6">
         <Link href="/extensions" className="hover:text-foreground transition-colors">
-          Till\u00e4gg
+          Tillägg
         </Link>
         <span>/</span>
         <Link

components/extensions/general/AiCategorizationWorkspace.tsx

@@ -8,7 +8,7 @@ export default function AiCategorizationWorkspace({ userId }: WorkspaceComponent
   return (
     <EmptyExtensionState
       title="AI-kategorisering"
-      description="AI-kategorisering k\u00f6rs automatiskt n\u00e4r nya transaktioner synkas. G\u00e5 till Transaktioner f\u00f6r att se f\u00f6rslag."
+      description="AI-kategorisering körs automatiskt när nya transaktioner synkas. Gå till Transaktioner för att se förslag."
       icon={<Sparkles className="h-12 w-12 text-muted-foreground/40 mb-4" />}
     />
   )

components/extensions/general/AiChatWorkspace.tsx

@@ -8,7 +8,7 @@ export default function AiChatWorkspace({ userId }: WorkspaceComponentProps) {
   return (
     <EmptyExtensionState
       title="AI-assistent"
-      description="Anv\u00e4nd chattwidgeten i nedre h\u00f6gra h\u00f6rnet f\u00f6r att st\u00e4lla fr\u00e5gor om bokf\u00f6ring och skatt."
+      description="Använd chattwidgeten i nedre högra hörnet för att ställa frågor om bokföring och skatt."
       icon={<MessageSquare className="h-12 w-12 text-muted-foreground/40 mb-4" />}
     />
   )

components/extensions/general/PushNotificationsWorkspace.tsx

@@ -8,7 +8,7 @@ export default function PushNotificationsWorkspace({ userId }: WorkspaceComponen
   return (
     <EmptyExtensionState
       title="Push-notiser"
-      description="Konfigurera push-notiser under Inst\u00e4llningar. Notiser skickas automatiskt vid viktiga h\u00e4ndelser."
+      description="Konfigurera push-notiser under Inställningar. Notiser skickas automatiskt vid viktiga händelser."
       icon={<Bell className="h-12 w-12 text-muted-foreground/40 mb-4" />}
     />
   )

components/extensions/general/ReceiptOcrWorkspace.tsx

@@ -8,7 +8,7 @@ export default function ReceiptOcrWorkspace({ userId }: WorkspaceComponentProps)
   return (
     <EmptyExtensionState
       title="Kvittoscanning"
-      description="Ladda upp och skanna kvitton direkt fr\u00e5n till\u00e4ggets arbetsyta. G\u00e5 till Kvitton i sidomenyn f\u00f6r att komma ig\u00e5ng."
+      description="Ladda upp och skanna kvitton direkt från tillägets arbetsyta. Gå till Kvitton i sidomenyn för att komma igång."
       icon={<Camera className="h-12 w-12 text-muted-foreground/40 mb-4" />}
     />
   )

components/extensions/general/document-inbox/DocumentInboxCard.tsx

@@ -33,10 +33,10 @@ function formatRelativeTime(dateStr: string): string {
   return `${diffD} dagar sedan`
 }
 
-function formatSEK(amount: number): string {
+function formatAmount(amount: number, currency: string = 'SEK'): string {
   return new Intl.NumberFormat('sv-SE', {
     style: 'currency',
-    currency: 'SEK',
+    currency,
     minimumFractionDigits: 0,
     maximumFractionDigits: 0,
   }).format(amount)
@@ -53,7 +53,7 @@ function getDocumentIcon(type: DocumentClassificationType) {
   }
 }
 
-function getSummaryText(item: InvoiceInboxItem): { label: string; total: number } {
+function getSummaryText(item: InvoiceInboxItem): { label: string; total: number; currency: string } {
   const type = item.document_type ?? 'supplier_invoice'
 
   switch (type) {
@@ -63,23 +63,26 @@ function getSummaryText(item: InvoiceInboxItem): { label: string; total: number
       return {
         label: (item.supplier as { name?: string } | undefined)?.name ?? (summary.supplierName || 'Okänd leverantör'),
         total: summary.total,
+        currency: summary.currency,
       }
     }
     case 'receipt': {
-      const receipt = item.receipt as { merchant_name?: string; total_amount?: number } | undefined
+      const receipt = item.receipt as { merchant_name?: string; total_amount?: number; currency?: string } | undefined
       return {
         label: receipt?.merchant_name ?? 'Okänd handlare',
         total: receipt?.total_amount ?? 0,
+        currency: receipt?.currency || 'SEK',
       }
     }
     case 'government_letter': {
       return {
         label: item.email_from ?? 'Okänd avsändare',
         total: 0,
+        currency: 'SEK',
       }
     }
     default: {
-      return { label: 'Granska manuellt', total: 0 }
+      return { label: 'Granska manuellt', total: 0, currency: 'SEK' }
     }
   }
 }
@@ -92,7 +95,7 @@ export default function DocumentInboxCard({ item, onClick }: DocumentInboxCardPr
   const docTypeVariant = getDocumentTypeVariant(docType) as 'default' | 'secondary' | 'destructive' | 'outline' | 'success' | 'warning'
 
   const fileName = (item.document as { file_name?: string } | undefined)?.file_name ?? 'Okänd fil'
-  const { label: summaryLabel, total } = getSummaryText(item)
+  const { label: summaryLabel, total, currency } = getSummaryText(item)
 
   return (
     <Card
@@ -122,7 +125,7 @@ export default function DocumentInboxCard({ item, onClick }: DocumentInboxCardPr
 
         <div className="flex flex-col items-end gap-1 shrink-0">
           {total > 0 && (
-            <span className="text-sm font-medium">{formatSEK(total)}</span>
+            <span className="text-sm font-medium">{formatAmount(total, currency)}</span>
           )}
           <div className="flex items-center gap-1.5">
             <Badge variant={docTypeVariant} className="text-[10px] px-1.5 py-0">

components/extensions/general/document-inbox/ReceiptInboxDetail.tsx

@@ -34,10 +34,10 @@ interface ReceiptInboxDetailProps {
   onConfirm: () => void
 }
 
-function formatSEK(amount: number): string {
+function formatAmount(amount: number, currency: string = 'SEK'): string {
   return new Intl.NumberFormat('sv-SE', {
     style: 'currency',
-    currency: 'SEK',
+    currency,
     minimumFractionDigits: 2,
     maximumFractionDigits: 2,
   }).format(amount)
@@ -180,7 +180,7 @@ export default function ReceiptInboxDetail({
               <div>
                 <span className="text-muted-foreground">Totalbelopp</span>
                 <p className="font-medium">
-                  {receipt.total_amount ? formatSEK(receipt.total_amount) : '-'}
+                  {receipt.total_amount ? formatAmount(receipt.total_amount) : '-'}
                 </p>
               </div>
               <div>
@@ -217,7 +217,7 @@ export default function ReceiptInboxDetail({
                       <div className="flex-1 min-w-0">
                         <p className="text-sm truncate">{li.description}</p>
                         <p className="text-xs text-muted-foreground">
-                          {formatSEK(li.line_total)}
+                          {formatAmount(li.line_total)}
                           {li.vat_rate != null && ` (${li.vat_rate}% moms)`}
                         </p>
                       </div>
@@ -237,8 +237,8 @@ export default function ReceiptInboxDetail({
             {/* Totals */}
             {lineItems.length > 0 && (
               <div className="flex gap-4 text-sm">
-                <Badge variant="default">Företag: {formatSEK(Math.round(businessTotal * 100) / 100)}</Badge>
-                <Badge variant="secondary">Privat: {formatSEK(Math.round(privateTotal * 100) / 100)}</Badge>
+                <Badge variant="default">Företag: {formatAmount(Math.round(businessTotal * 100) / 100)}</Badge>
+                <Badge variant="secondary">Privat: {formatAmount(Math.round(privateTotal * 100) / 100)}</Badge>
               </div>
             )}
 

components/extensions/general/invoice-inbox/InboxDetailDialog.tsx

@@ -46,11 +46,11 @@ interface InboxDetailDialogProps {
   suppliers: Supplier[]
 }
 
-function formatSEK(amount: number | null): string {
+function formatAmount(amount: number | null, currency: string = 'SEK'): string {
   if (amount == null) return '-'
   return new Intl.NumberFormat('sv-SE', {
     style: 'currency',
-    currency: 'SEK',
+    currency,
     minimumFractionDigits: 2,
     maximumFractionDigits: 2,
   }).format(amount)
@@ -71,6 +71,7 @@ export default function InboxDetailDialog({
   if (!item) return null
 
   const extraction = item.extracted_data as unknown as InvoiceExtractionResult | null
+  const currency = extraction?.invoice.currency || 'SEK'
   const confidence = getConfidenceLabel(item.confidence)
   const confidenceVariant = confidence.variant as 'default' | 'secondary' | 'destructive' | 'outline' | 'success' | 'warning'
   const statusVariant = getStatusVariant(item.status) as 'default' | 'secondary' | 'destructive' | 'outline' | 'success' | 'warning'
@@ -240,10 +241,10 @@ export default function InboxDetailDialog({
                             <TableCell className="text-sm">{line.description}</TableCell>
                             <TableCell className="text-right text-sm">{line.quantity}</TableCell>
                             <TableCell className="text-right text-sm">
-                              {line.unitPrice != null ? formatSEK(line.unitPrice) : '-'}
+                              {line.unitPrice != null ? formatAmount(line.unitPrice, currency) : '-'}
                             </TableCell>
                             <TableCell className="text-right text-sm font-medium">
-                              {formatSEK(line.lineTotal)}
+                              {formatAmount(line.lineTotal, currency)}
                             </TableCell>
                             <TableCell className="text-right text-sm">
                               {line.vatRate != null ? `${line.vatRate}%` : '-'}
@@ -263,16 +264,16 @@ export default function InboxDetailDialog({
             <div className="space-y-2 text-sm">
               <div className="flex justify-between">
                 <span className="text-muted-foreground">Netto</span>
-                <span>{formatSEK(extraction.totals.subtotal)}</span>
+                <span>{formatAmount(extraction.totals.subtotal, currency)}</span>
               </div>
               <div className="flex justify-between">
                 <span className="text-muted-foreground">Moms</span>
-                <span>{formatSEK(extraction.totals.vatAmount)}</span>
+                <span>{formatAmount(extraction.totals.vatAmount, currency)}</span>
               </div>
               <Separator />
               <div className="flex justify-between font-medium text-base">
                 <span>Totalt</span>
-                <span>{formatSEK(extraction.totals.total)}</span>
+                <span>{formatAmount(extraction.totals.total, currency)}</span>
               </div>
             </div>
           </>

components/extensions/general/invoice-inbox/InboxItemCard.tsx

@@ -31,18 +31,17 @@ function formatRelativeTime(dateStr: string): string {
   return `${diffD} dagar sedan`
 }
 
-function formatSEK(amount: number): string {
+function formatAmount(amount: number, currency: string = 'SEK'): string {
   return new Intl.NumberFormat('sv-SE', {
     style: 'currency',
-    currency: 'SEK',
+    currency,
     minimumFractionDigits: 0,
     maximumFractionDigits: 0,
   }).format(amount)
 }
 
 export default function InboxItemCard({ item, onClick }: InboxItemCardProps) {
-  const extraction = item.extracted_data as unknown as InvoiceExtractionResult | null
-  const summary = formatExtractionSummary(extraction)
+  const summary = formatExtractionSummary(item.extracted_data as unknown as InvoiceExtractionResult | null)
   const confidence = getConfidenceLabel(item.confidence)
   const statusVariant = getStatusVariant(item.status) as 'default' | 'secondary' | 'destructive' | 'outline' | 'success' | 'warning'
   const confidenceVariant = confidence.variant as 'default' | 'secondary' | 'destructive' | 'outline' | 'success' | 'warning'
@@ -80,7 +79,7 @@ export default function InboxItemCard({ item, onClick }: InboxItemCardProps) {
 
         <div className="flex flex-col items-end gap-1 shrink-0">
           {summary.total > 0 && (
-            <span className="text-sm font-medium">{formatSEK(summary.total)}</span>
+            <span className="text-sm font-medium">{formatAmount(summary.total, summary.currency)}</span>
           )}
           <div className="flex items-center gap-1.5">
             {item.confidence != null && (

components/extensions/shared/DateRangeFilter.tsx

@@ -43,9 +43,9 @@ export default function DateRangeFilter({ onRangeChange, className }: DateRangeF
   }
 
   const periods: { key: Period; label: string }[] = [
-    { key: 'month', label: 'M\u00e5nad' },
+    { key: 'month', label: 'Månad' },
     { key: 'quarter', label: 'Kvartal' },
-    { key: 'year', label: '\u00c5r' },
+    { key: 'year', label: 'År' },
   ]
 
   return (

components/extensions/shared/EmptyExtensionState.tsx

@@ -7,8 +7,8 @@ interface EmptyExtensionStateProps {
 }
 
 export default function EmptyExtensionState({
-  title = 'Ingen data \u00e4nnu',
-  description = 'Data kommer att visas h\u00e4r n\u00e4r det finns tillg\u00e4ngligt.',
+  title = 'Ingen data ännu',
+  description = 'Data kommer att visas här när det finns tillgängligt.',
   icon,
 }: EmptyExtensionStateProps) {
   return (