feat: UX improvements — nav, reports tabs, dashboard alerts, transaction hints, settings layout

- Move Reports to Finans nav group and auto-expand Övrigt on its pages
- Make report tabs horizontally scrollable with gradient fade on mobile
- Surface deadlines and alerts above the fold on dashboard
- Add dismissible categorization hint card on transactions page
- Split settings company form into 4 separate Cards for scannability
- Add monthly breakdown report, document upload zone, journal entry attachments
- Add batch category selector, receipt document linking, invoice form improvements

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

app/api/extensions/receipt-ocr/upload/route.ts

@@ -65,12 +65,14 @@ export async function POST(request: Request) {
     }
 
     // WORM archive copy (non-blocking — receipt flow continues even if this fails)
+    let wormDocumentId: string | null = null
     try {
-      await uploadDocument(user.id, {
+      const wormDoc = await uploadDocument(user.id, {
         name: imageFile.name,
         buffer: arrayBuffer,
         type: imageFile.type,
       }, { upload_source: 'camera' })
+      wormDocumentId = wormDoc.id
     } catch (archiveErr) {
       console.error('[receipt-upload] WORM archive copy failed:', archiveErr)
     }
@@ -86,6 +88,7 @@ export async function POST(request: Request) {
         user_id: user.id,
         image_url: imageUrl,
         status: 'processing',
+        document_id: wormDocumentId,
       })
       .select()
       .single()
@@ -178,7 +181,7 @@ export async function POST(request: Request) {
         type: 'receipt.extracted',
         payload: {
           receipt: completeReceipt,
-          documentId: null,
+          documentId: wormDocumentId,
           confidence: extraction.confidence,
           userId: user.id,
         },