fix(worklist): count unbooked skattekonto rows in the Att göra badge and Hem list (#2180) (#2227)

The Transaktioner inbox lists unbooked skattekonto rows next to unbooked
bank rows, but the sidebar badge and the Hem "Att göra" list counted bank
rows only, so a migrated tax account waited in the inbox unseen.

- lib/worklist: new category book_skattekonto with the inbox's own
  predicate (status = 'booked', no verifikat, not ignored); aggregate
  includes it in counts and total.
- Hem: a "Bokföra skattekontohändelser" row under Bokför, deep-linking to
  /transactions?source=skatteverket.
- Sidebar badge hook: the same third head-count query, summed into the
  /transactions badge.
- DashboardNav subscribes to skattekonto_transactions realtime changes;
  migration adds the table to the supabase_realtime publication so a
  booked or ignored row drops the badge without a manual refresh.

Closes #2180


Claude-Session: https://claude.ai/code/session_01QPQLwHNEiQfiCNLSMzXMiQ

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

messages/en.json

@@ -6534,6 +6534,7 @@
     "band_bevaka": "Monitor",
     "row_book_transactions": "Transactions to record",
     "row_book_transactions_stale": "{count} older than 14 days",
+    "row_book_skattekonto": "Tax account events to record",
     "row_inbox_documents": "Documents to handle",
     "row_inbox_documents_detail": "Match to a transaction or record directly",
     "row_supplier_approval": "Supplier invoices to approve",

messages/sv.json

@@ -6534,6 +6534,7 @@
     "band_bevaka": "Bevaka",
     "row_book_transactions": "Bokföra transaktioner",
     "row_book_transactions_stale": "{count} äldre än 14 dagar",
+    "row_book_skattekonto": "Bokföra skattekontohändelser",
     "row_inbox_documents": "Underlag att hantera",
     "row_inbox_documents_detail": "Matcha mot transaktion eller bokför direkt",
     "row_supplier_approval": "Leverantörsfakturor att attestera",