Audit v3: VAT alignment, security, encoding, UX, compliance

VAT System Alignment (LEGAL - Critical): - Align frontend VAT codes with backend (S25→U25, K25→I25, etc.) - Add missing codes: UEU, IVV, IVY, REP - Fix output VAT account 5710→5611 to match StandardDanishAccounts - Invoice posting now checks fiscal year status before allowing send - Disallow custom invoice number override (always use auto-numbering) Security: - Fix open redirect in AuthController (validate returnUrl is local) - Store seller CVR/name/address on invoice events (Momsloven §52) Backend Compliance: - Add description validation at posting (Bogføringsloven §7) - SAF-T: add DefaultCurrencyCode, TaxAccountingBasis to header - SAF-T: add TaxTable to MasterFiles with all VAT codes - SAF-T: always write balance elements even when zero - Add financial income account 9100 Renteindtægter Danish Encoding (~25 fixes): - Kassekladde: Bogført, Bogføring, Vælg, være, på, Tilføj, Differens - AttachmentUpload: træk, Understøtter, påkrævet, Bogføringsloven - keyboardShortcuts: Bogfør, Bogføring display name - ShortcutsHelpModal: åbne - DataTable: Genindlæs - documentProcessing: være - CloseFiscalYearWizard: årsafslutning Bugs Fixed: - Non-null assertion crashes in Kunder.tsx and Produkter.tsx (company!.id) - StatusBadge typo "Succces"→"Succes" - HTML entity ø in Kassekladde→proper UTF-8 - AmountText showSign prop was dead code (true || showSign) UX Improvements: - Add PageHeader to Bankafstemning and Dashboard loading/empty states - Responsive columns in Bankafstemning (xs/sm/lg breakpoints) - Disable misleading buttons: Settings preferences, Kontooversigt edit, Loenforstaelse export — with tooltips explaining status - Add DemoDataDisclaimer to UserSettings - Fix breadcrumb self-references on 3 pages - Replace Dashboard fake progress bar with honest message - Standardize date format DD-MM-YYYY in Bankafstemning and Ordrer - Replace Input type="number" with InputNumber in Ordrer Quality: - Remove 8 redundant console.error statements - Fix Kreditnotaer breadcrumb "Salg"→"Fakturering" for consistency Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-06 01:15:45 +01:00 · 2026-02-06 01:15:45 +01:00 · 1a0922b778
commit 1a0922b778
parent cd5333f07f
33 changed files with 355 additions and 172 deletions
--- a/.beads/issues.jsonl
+++ b/.beads/issues.jsonl
@ -5,7 +5,9 @@
 {"id":"books-5tg","title":"opret et backend job med hangfir\ne som sikrer, at bankkonto altid stemmer med den pågældende konto","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:24:01.505911+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:37:08.293897+01:00","closed_at":"2026-01-30T14:37:08.293897+01:00","close_reason":"Closed"}
 {"id":"books-8ea","title":"fjern brugers navn fra højre hjørne ved profile ikonet","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:20:16.406033+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:22:59.64468+01:00","closed_at":"2026-01-30T14:22:59.64468+01:00","close_reason":"Closed"}
 {"id":"books-8lo","title":"revisit the laytoug and desig nfor kontooversigten.","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:25:06.620288+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:47:52.365315+01:00","closed_at":"2026-01-30T14:47:52.365315+01:00","close_reason":"Closed"}
+{"id":"books-8n5","title":"v3 Phase 1+3: Frontend VAT alignment + encoding + bugs","description":"Align frontend VAT codes with backend, fix ~20 Danish encoding issues, fix non-null assertions, StatusBadge typo, HTML entity","status":"in_progress","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-02-06T01:06:57.325868+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-02-06T01:07:01.858975+01:00"}
 {"id":"books-9ig","title":"Phase 3: Critical frontend bugs","description":"Fix closing wizard entries, create-next-year checkbox, Dashboard a-href, Kassekladde filters, edit draft form population, Vis detaljer action, Flere filtre button, duplicate migration","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-02-05T22:16:57.507387+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-02-06T00:18:23.721813+01:00","closed_at":"2026-02-06T00:18:23.721813+01:00","close_reason":"Closed"}
+{"id":"books-9te","title":"v3 Phase 1+2+6: Backend VAT, security, compliance","description":"Fix invoice fiscal year check, disable custom invoice numbers, open redirect, OAuth CSRF, cross-company validation, description validation, SAF-T fixes, chart of accounts, seller CVR on invoices","status":"in_progress","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-02-06T01:06:57.223084+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-02-06T01:07:01.78072+01:00"}
 {"id":"books-bj6","title":"Test automatisk pickup","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:04:40.572496+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:05:44.401903+01:00","closed_at":"2026-01-30T14:05:44.401903+01:00","close_reason":"completed"}
 {"id":"books-byl","title":"opret giv et shortlink på frontenden til backend på /hangfire","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:24:34.946139+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:40:44.62014+01:00","closed_at":"2026-01-30T14:40:44.62014+01:00","close_reason":"Closed"}
 {"id":"books-cdf","title":"opret","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:23:39.411558+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T17:45:05.363658+01:00","closed_at":"2026-01-30T17:45:05.363658+01:00","close_reason":"Skipped - task description too vague"}
@ -13,6 +15,7 @@
 {"id":"books-cws","title":"Phase 3: Accounting compliance fixes","description":"Balanced entry enforcement, VAT code unification, invoice numbering, fiscal year gap/overlap checks, posting date tracking, SAF-T fixes.","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-02-05T21:12:09.362182+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-02-05T21:35:30.369857+01:00","closed_at":"2026-02-05T21:35:30.369857+01:00","close_reason":"Closed"}
 {"id":"books-h6e","title":"fjern hurtig bogføring og den visning der høre dertil","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:14:50.436314+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:18:09.911294+01:00","closed_at":"2026-01-30T14:18:09.911294+01:00","close_reason":"Closed"}
 {"id":"books-hzt","title":"fix bug med tilføj brugere står forkert med encoded tegn","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:21:34.556319+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:28:31.320973+01:00","closed_at":"2026-01-30T14:28:31.320973+01:00","close_reason":"Closed"}
+{"id":"books-i6l","title":"v3 Phase 4+5: UX, loading states, quality","description":"Fix loading/empty states, disclaimers, breadcrumbs, responsive columns, dead code, console.error cleanup, InputNumber","status":"in_progress","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-02-06T01:06:57.418109+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-02-06T01:07:01.943749+01:00"}
 {"id":"books-k95","title":"Phase 4: UX consistency \u0026 bug fixes","description":"Danish character encoding, DemoDataDisclaimer deployment, PageHeader adoption, mobile responsiveness, mock data removal, dead buttons.","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-02-05T21:12:09.471301+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-02-05T21:35:30.433843+01:00","closed_at":"2026-02-05T21:35:30.433843+01:00","close_reason":"Closed"}
 {"id":"books-ley","title":"Phase 1: GraphQL Authentication \u0026 Authorization","description":"Add authentication to GraphQL endpoint and authorization checks to all resolvers. Fix: S-01 through S-06, RBAC always returning owner, admin hardcoded email check.","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-02-05T21:12:09.131213+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-02-05T21:35:30.243779+01:00","closed_at":"2026-02-05T21:35:30.243779+01:00","close_reason":"Closed"}
 {"id":"books-ljg","title":"Fjern mock data og kobl frontend til backend GraphQL","description":"Frontend bruger ~2000 linjer hardcoded mock data i stedet for at bruge de eksisterende GraphQL hooks.\n\n## Problem\n- Backend GraphQL API er klar med queries og mutations\n- Frontend har hooks skrevet (useAccounts, useFiscalYears, etc.)\n- Men pages bruger hardcoded mock data i stedet for at kalde hooks\n\n## Filer der skal opdateres\n1. Dashboard.tsx - mock metrics, charts, transactions\n2. Kassekladde.tsx - mock accounts og posteringer  \n3. Kontooversigt.tsx - mock kontoplan og balancer\n4. Bankafstemning.tsx - mock bank accounts og transaktioner\n5. FiscalYearSelector.tsx - mock fiscal years\n6. CompanySwitcher.tsx - mock companies\n7. Stores (companyStore, periodStore) - skal initialiseres fra API\n\n## Acceptkriterier\n- Al mock data fjernet fra frontend\n- Alle pages bruger GraphQL hooks til at hente data\n- Stores initialiseres korrekt ved app start\n- Data vises fra backend i UI","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T22:27:49.225279+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T22:42:04.17437+01:00","closed_at":"2026-01-30T22:42:04.17437+01:00","close_reason":"Closed"}
--- a/backend/Books.Api/Commands/Invoices/InvoiceCommandHandlers.cs
+++ b/backend/Books.Api/Commands/Invoices/InvoiceCommandHandlers.cs
@ -8,7 +8,7 @@ namespace Books.Api.Commands.Invoices;

 /// <summary>
 /// Command handler for creating invoices.
-/// Auto-assigns a sequential invoice number if one is not provided.
+/// Always auto-assigns a sequential invoice number (Momsloven §52 - sequential numbering required).
 /// Validates the company has a CVR number (required for invoicing).
 /// </summary>
 public class CreateInvoiceCommandHandler(
@ -39,15 +39,16 @@ public class CreateInvoiceCommandHandler(
                "Virksomheden skal have et CVR-nummer for at oprette fakturaer. Opdater venligst virksomhedsindstillinger.");
        }

-        // Auto-assign invoice number if not provided
-        var invoiceNumber = command.InvoiceNumber;
-        if (string.IsNullOrWhiteSpace(invoiceNumber))
-        {
-            invoiceNumber = await invoiceNumberService.GetNextInvoiceNumberAsync(
-                command.CompanyId,
-                command.InvoiceDate.Year,
-                cancellationToken);
-        }
+        // Always auto-assign invoice number (Momsloven §52 requires unbroken sequential numbering)
+        var invoiceNumber = await invoiceNumberService.GetNextInvoiceNumberAsync(
+            command.CompanyId,
+            command.InvoiceDate.Year,
+            cancellationToken);
+
+        // Build seller address from company info
+        var sellerAddress = string.Join(", ",
+            new[] { company.Address, company.PostalCode, company.City }
+                .Where(s => !string.IsNullOrWhiteSpace(s)));

        aggregate.Create(
            command.CompanyId,
@ -63,7 +64,10 @@ public class CreateInvoiceCommandHandler(
            command.VatCode,
            command.Notes,
            command.Reference,
-            command.CreatedBy);
+            command.CreatedBy,
+            company.Cvr,
+            company.Name,
+            sellerAddress);
    }
 }

@ -124,19 +128,59 @@ public class RemoveInvoiceLineCommandHandler
    }
 }

-public class MarkInvoiceSentCommandHandler
+/// <summary>
+/// Command handler for marking an invoice as sent.
+/// Validates fiscal year status before allowing the invoice to be sent.
+/// </summary>
+public class MarkInvoiceSentCommandHandler(
+    IInvoiceRepository invoiceRepository,
+    IFiscalYearRepository fiscalYearRepository)
    : CommandHandler<InvoiceAggregate, InvoiceId, MarkInvoiceSentCommand>
 {
-    public override Task ExecuteAsync(
+    public override async Task ExecuteAsync(
        InvoiceAggregate aggregate,
        MarkInvoiceSentCommand command,
        CancellationToken cancellationToken)
    {
+        // Load the invoice read model to get fiscal year ID
+        var invoice = await invoiceRepository.GetByIdAsync(
+            aggregate.Id.Value, cancellationToken);
+
+        var fiscalYearId = invoice?.FiscalYearId;
+
+        // Validate fiscal year is set
+        if (string.IsNullOrWhiteSpace(fiscalYearId))
+        {
+            throw new DomainException(
+                "FISCAL_YEAR_REQUIRED",
+                "Fiscal year is required for sending an invoice",
+                "Regnskabsår er påkrævet for afsendelse af en faktura");
+        }
+
+        // Fetch and validate fiscal year
+        var fiscalYear = await fiscalYearRepository.GetByIdAsync(
+            fiscalYearId, cancellationToken);
+
+        if (fiscalYear == null)
+        {
+            throw new DomainException(
+                "FISCAL_YEAR_NOT_FOUND",
+                $"Fiscal year '{fiscalYearId}' not found",
+                $"Regnskabsår '{fiscalYearId}' blev ikke fundet");
+        }
+
+        // Validate fiscal year is open (not Closed or Locked)
+        if (fiscalYear.Status != "Open")
+        {
+            throw new DomainException(
+                "FISCAL_YEAR_NOT_OPEN",
+                $"Fiscal year is {fiscalYear.Status}. Only open fiscal years allow posting.",
+                $"Regnskabsåret er {fiscalYear.Status}. Kun åbne regnskabsår tillader bogføring.");
+        }
+
        aggregate.Send(
            command.LedgerTransactionId,
            command.SentBy);
-
-        return Task.CompletedTask;
    }
 }

--- a/backend/Books.Api/Controllers/AuthController.cs
+++ b/backend/Books.Api/Controllers/AuthController.cs
@ -16,6 +16,9 @@ public class AuthController : ControllerBase
    {
        // The [Authorize] attribute triggers the OIDC challenge if not authenticated.
        // If we reach here, the user is authenticated - redirect back to the app.
+        // Validate returnUrl to prevent open redirect attacks
+        if (returnUrl != null && !Url.IsLocalUrl(returnUrl))
+            returnUrl = "/";
        return Redirect(returnUrl ?? "/");
    }

--- a/backend/Books.Api/Domain/Invoices/Events/InvoiceCreatedEvent.cs
+++ b/backend/Books.Api/Domain/Invoices/Events/InvoiceCreatedEvent.cs
@ -25,7 +25,10 @@ public class InvoiceCreatedEvent(
    InvoiceType type = InvoiceType.Invoice,
    string? originalInvoiceId = null,
    string? originalInvoiceNumber = null,
-    string? creditReason = null) : AggregateEvent<InvoiceAggregate, InvoiceId>
+    string? creditReason = null,
+    string? sellerCvr = null,
+    string? sellerName = null,
+    string? sellerAddress = null) : AggregateEvent<InvoiceAggregate, InvoiceId>
 {
    public string CompanyId { get; } = companyId;
    public string FiscalYearId { get; } = fiscalYearId;
@ -61,4 +64,19 @@ public class InvoiceCreatedEvent(
    /// For credit notes: Reason for issuing the credit note.
    /// </summary>
    public string? CreditReason { get; } = creditReason;
+
+    /// <summary>
+    /// Seller CVR number (company registration number).
+    /// </summary>
+    public string? SellerCvr { get; } = sellerCvr;
+
+    /// <summary>
+    /// Seller company name.
+    /// </summary>
+    public string? SellerName { get; } = sellerName;
+
+    /// <summary>
+    /// Seller company address.
+    /// </summary>
+    public string? SellerAddress { get; } = sellerAddress;
 }
--- a/backend/Books.Api/Domain/Invoices/InvoiceAggregate.cs
+++ b/backend/Books.Api/Domain/Invoices/InvoiceAggregate.cs
@ -138,7 +138,10 @@ public class InvoiceAggregate(InvoiceId id) : AggregateRoot<InvoiceAggregate, In
        string? vatCode,
        string? notes,
        string? reference,
-        string createdBy)
+        string createdBy,
+        string? sellerCvr = null,
+        string? sellerName = null,
+        string? sellerAddress = null)
    {
        if (_isCreated)
            throw new DomainException("INVOICE_EXISTS", "Invoice already exists", "Faktura eksisterer allerede");
@ -166,7 +169,10 @@ public class InvoiceAggregate(InvoiceId id) : AggregateRoot<InvoiceAggregate, In
            vatCode,
            notes,
            reference,
-            createdBy));
+            createdBy,
+            sellerCvr: sellerCvr,
+            sellerName: sellerName,
+            sellerAddress: sellerAddress));
    }

    public void AddLine(
--- a/backend/Books.Api/Domain/JournalEntryDrafts/JournalEntryDraftAggregate.cs
+++ b/backend/Books.Api/Domain/JournalEntryDrafts/JournalEntryDraftAggregate.cs
@ -20,6 +20,7 @@ public class JournalEntryDraftAggregate(JournalEntryDraftId id)
    private string _companyId = string.Empty;
    private string _voucherNumber = string.Empty;
    private string? _fiscalYearId;
+    private string? _description;
    private List<DraftLine> _lines = [];

    public string CompanyId => _companyId;
@ -48,6 +49,7 @@ public class JournalEntryDraftAggregate(JournalEntryDraftId id)
    public void Apply(JournalEntryDraftUpdatedEvent e)
    {
        _fiscalYearId = e.FiscalYearId;
+        _description = e.Description;
        _lines = e.Lines.ToList();
    }

@ -184,6 +186,13 @@ public class JournalEntryDraftAggregate(JournalEntryDraftId id)
                "Posted by is required",
                "Bogført af er påkrævet");

+        // Validate description is set (Bogføringsloven §7 stk. 1 nr. 3 requires a text describing the transaction)
+        if (string.IsNullOrWhiteSpace(_description))
+            throw new DomainException(
+                "DESCRIPTION_REQUIRED",
+                "A description is required for posting. Each registration must have a text describing the transaction (Bogføringsloven §7 stk. 1 nr. 3).",
+                "En beskrivelse er påkrævet for bogføring. Hver registrering skal have en tekst, der beskriver transaktionen (Bogføringsloven §7 stk. 1 nr. 3).");
+
        // Validate minimum number of lines for double-entry bookkeeping
        if (_lines.Count < 2)
            throw new DomainException(
--- a/backend/Books.Api/EventFlow/Subscribers/StandardDanishAccounts.cs
+++ b/backend/Books.Api/EventFlow/Subscribers/StandardDanishAccounts.cs
@ -221,8 +221,9 @@ public static class StandardDanishAccounts

        // =========================================
        // FINANSIELLE POSTER (Financial) - 9xxx
-        // Standard: 3670 = Øvrige finansielle omkostninger
+        // Standard: 3510 = Finansielle indtægter, 3670 = Øvrige finansielle omkostninger
        // =========================================
+        yield return new("9100", "Renteindtægter", AccountType.Revenue, "Finansielle indtægter", null, "9100");
        yield return new("9200", "Bankrenter", AccountType.Financial, null, null, "3670");
        yield return new("9210", "Leverandører mv.", AccountType.Financial, "Renter til leverandører", null, "3670");
        yield return new("9220", "Ikke-fradragsberettigede renter", AccountType.Financial, null, null, "3670");
--- a/backend/Books.Api/Saft/Services/SaftXmlBuilder.cs
+++ b/backend/Books.Api/Saft/Services/SaftXmlBuilder.cs
@ -53,9 +53,15 @@ public class SaftXmlBuilder
        writer.WriteElementString("SoftwareID", header.SoftwareID);
        writer.WriteElementString("SoftwareVersion", header.SoftwareVersion);

+        // SAF-T requires DefaultCurrencyCode (ISO 4217)
+        writer.WriteElementString("DefaultCurrencyCode", "DKK");
+
        WriteCompany(writer, header.Company);
        WriteSelectionCriteria(writer, header.SelectionCriteria);

+        // SAF-T requires TaxAccountingBasis: A = Accrual, C = Cash, O = Other
+        writer.WriteElementString("TaxAccountingBasis", "A");
+
        writer.WriteEndElement(); // Header
    }

@ -133,10 +139,52 @@ public class SaftXmlBuilder
        WriteGeneralLedgerAccounts(writer, masterFiles.GeneralLedgerAccounts);
        WriteCustomers(writer, masterFiles.Customers);
        WriteSuppliers(writer, masterFiles.Suppliers);
+        WriteTaxTable(writer);

        writer.WriteEndElement(); // MasterFiles
    }

+    /// <summary>
+    /// Writes the TaxTable element declaring all Danish VAT codes.
+    /// Required by SAF-T schema to describe the tax codes used in transactions.
+    /// </summary>
+    private static void WriteTaxTable(XmlWriter writer)
+    {
+        writer.WriteStartElement("TaxTable");
+        writer.WriteStartElement("TaxTableEntry");
+
+        writer.WriteElementString("TaxType", "MVA");
+        writer.WriteElementString("Description", "Dansk moms (VAT)");
+
+        // Output VAT codes
+        WriteTaxCodeDetails(writer, "U25", "Udgående moms 25%", 25.00m);
+        WriteTaxCodeDetails(writer, "UEU", "EU-salg (momsfrit)", 0.00m);
+        WriteTaxCodeDetails(writer, "UEXP", "Eksport uden for EU (momsfrit)", 0.00m);
+
+        // Input VAT codes
+        WriteTaxCodeDetails(writer, "I25", "Indgående moms 25%", 25.00m);
+        WriteTaxCodeDetails(writer, "IEUV", "EU-erhvervelse varer (reverse charge)", 25.00m);
+        WriteTaxCodeDetails(writer, "IEUY", "EU-erhvervelse ydelser (reverse charge)", 25.00m);
+        WriteTaxCodeDetails(writer, "IVV", "Import varer fra verden", 0.00m);
+        WriteTaxCodeDetails(writer, "IVY", "Import ydelser fra verden", 0.00m);
+
+        // Special codes
+        WriteTaxCodeDetails(writer, "REP", "Repræsentation (25% fradrag)", 25.00m);
+        WriteTaxCodeDetails(writer, "INGEN", "Ingen moms", 0.00m);
+
+        writer.WriteEndElement(); // TaxTableEntry
+        writer.WriteEndElement(); // TaxTable
+    }
+
+    private static void WriteTaxCodeDetails(XmlWriter writer, string taxCode, string description, decimal taxPercentage)
+    {
+        writer.WriteStartElement("TaxCodeDetails");
+        writer.WriteElementString("TaxCode", taxCode);
+        writer.WriteElementString("Description", description);
+        writer.WriteElementString("TaxPercentage", FormatDecimal(taxPercentage));
+        writer.WriteEndElement(); // TaxCodeDetails
+    }
+
    private static void WriteGeneralLedgerAccounts(XmlWriter writer, List<SaftAccount> accounts)
    {
        if (accounts.Count == 0) return;
@ -160,17 +208,13 @@ public class SaftXmlBuilder

            writer.WriteElementString("AccountType", account.AccountType);

-            // Opening balances
-            if (account.OpeningDebitBalance != 0)
-                writer.WriteElementString("OpeningDebitBalance", FormatDecimal(account.OpeningDebitBalance));
-            if (account.OpeningCreditBalance != 0)
-                writer.WriteElementString("OpeningCreditBalance", FormatDecimal(account.OpeningCreditBalance));
+            // Opening balances (SAF-T schema requires these elements even when zero)
+            writer.WriteElementString("OpeningDebitBalance", FormatDecimal(account.OpeningDebitBalance));
+            writer.WriteElementString("OpeningCreditBalance", FormatDecimal(account.OpeningCreditBalance));

-            // Closing balances
-            if (account.ClosingDebitBalance != 0)
-                writer.WriteElementString("ClosingDebitBalance", FormatDecimal(account.ClosingDebitBalance));
-            if (account.ClosingCreditBalance != 0)
-                writer.WriteElementString("ClosingCreditBalance", FormatDecimal(account.ClosingCreditBalance));
+            // Closing balances (SAF-T schema requires these elements even when zero)
+            writer.WriteElementString("ClosingDebitBalance", FormatDecimal(account.ClosingDebitBalance));
+            writer.WriteElementString("ClosingCreditBalance", FormatDecimal(account.ClosingCreditBalance));

            writer.WriteEndElement(); // Account
        }
--- a/frontend/src/api/documentProcessing.ts
+++ b/frontend/src/api/documentProcessing.ts
@ -117,7 +117,7 @@ export async function processDocument(
      }
      // Fallback error handling
      if (response.status === 401) {
-        throw new DocumentProcessingApiError('NOT_AUTHENTICATED', 'Du skal vaere logget ind');
+        throw new DocumentProcessingApiError('NOT_AUTHENTICATED', 'Du skal være logget ind');
      }
      if (response.status === 403) {
        throw new DocumentProcessingApiError('FORBIDDEN', 'Du har ikke adgang til denne virksomhed');
--- a/frontend/src/components/modals/CloseFiscalYearWizard.tsx
+++ b/frontend/src/components/modals/CloseFiscalYearWizard.tsx
@ -238,7 +238,7 @@ export default function CloseFiscalYearWizard({
      onSuccess?.();
    } catch (error) {
      if (error instanceof Error) {
-        message.error(`Fejl ved arsafslutning: ${error.message}`);
+        message.error(`Fejl ved årsafslutning: ${error.message}`);
      }
      console.error('Failed to close fiscal year:', error);
    } finally {
--- a/frontend/src/components/modals/CreateFiscalYearModal.tsx
+++ b/frontend/src/components/modals/CreateFiscalYearModal.tsx
@ -154,7 +154,6 @@ export default function CreateFiscalYearModal({
      if (error instanceof Error) {
        message.error(`Fejl ved oprettelse: ${error.message}`);
      }
-      console.error('Failed to create fiscal year:', error);
    } finally {
      setIsSubmitting(false);
    }
--- a/frontend/src/components/settings/BankConnectionsTab.tsx
+++ b/frontend/src/components/settings/BankConnectionsTab.tsx
@ -158,7 +158,6 @@ export default function BankConnectionsTab({ companyId }: BankConnectionsTabProp
      setSelectedLinkedAccount(newAccount.id);
    } catch (error) {
      showError(error, 'Kunne ikke oprette bankkonto');
-      console.error('Failed to create bank account:', error);
    }
  };

@ -192,7 +191,6 @@ export default function BankConnectionsTab({ companyId }: BankConnectionsTabProp
      setImportFromDate(dayjs());
    } catch (error) {
      showError(error, 'Kunne ikke koble bankkonto');
-      console.error('Failed to link account:', error);
    }
  };

@ -218,7 +216,6 @@ export default function BankConnectionsTab({ companyId }: BankConnectionsTabProp
      window.location.href = result.authorizationUrl;
    } catch (error) {
      showError(error, 'Kunne ikke starte bankforbindelse');
-      console.error('Failed to start bank connection:', error);
    }
  };

@ -230,7 +227,6 @@ export default function BankConnectionsTab({ companyId }: BankConnectionsTabProp
      showSuccess('Bankforbindelse afbrudt');
    } catch (error) {
      showError(error, 'Kunne ikke afbryde bankforbindelse');
-      console.error('Failed to disconnect:', error);
    }
  };

@ -255,7 +251,6 @@ export default function BankConnectionsTab({ companyId }: BankConnectionsTabProp
      window.location.href = result.authorizationUrl;
    } catch (error) {
      showError(error, 'Kunne ikke genoptage bankforbindelse');
-      console.error('Failed to reconnect bank connection:', error);
    }
  };

@ -267,7 +262,6 @@ export default function BankConnectionsTab({ companyId }: BankConnectionsTabProp
      showSuccess('Bankforbindelse arkiveret');
    } catch (error) {
      showError(error, 'Kunne ikke arkivere bankforbindelse');
-      console.error('Failed to archive:', error);
    }
  };

--- a/frontend/src/components/shared/AmountText.tsx
+++ b/frontend/src/components/shared/AmountText.tsx
@ -80,7 +80,7 @@ export function AmountText({
    const formatted = formatCurrency(Math.abs(amount));
    // Always show +/- prefix for non-zero amounts (accessibility: not color-only)
    // When showSign is explicitly true, same behavior; kept for API compatibility
-    const alwaysSign = true || showSign;
+    const alwaysSign = showSign;
    const sign = alwaysSign && amount !== 0 ? (amount > 0 ? '+' : '-') : amount < 0 ? '-' : '';
    const suffix = showCurrency ? ` ${currencySuffix}` : '';

--- a/frontend/src/components/shared/AttachmentUpload.tsx
+++ b/frontend/src/components/shared/AttachmentUpload.tsx
@ -63,7 +63,7 @@ const getFileIcon = (fileType: string) => {
 /**
 * Bilag (Document/Attachment) upload component.
 * Supports drag-drop, multiple file upload, and preview.
- * Required by Bogforingsloven § 6 for document retention.
+ * Required by Bogføringsloven § 6 for document retention.
 */
 export function AttachmentUpload({
  attachments = [],
@ -182,10 +182,10 @@ export function AttachmentUpload({
          <UploadOutlined style={{ fontSize: 32, color: '#1890ff' }} />
        </p>
        <p className="ant-upload-text">
-          Klik eller traek filer hertil for at uploade bilag
+          Klik eller træk filer hertil for at uploade bilag
        </p>
        <p className="ant-upload-hint">
-          Understotter PDF, billeder og Office-dokumenter (max {formatFileSize(maxFileSize)})
+          Understøtter PDF, billeder og Office-dokumenter (max {formatFileSize(maxFileSize)})
        </p>
      </Upload.Dragger>

@ -210,7 +210,7 @@ export function AttachmentUpload({
      {/* Required warning */}
      {required && attachments.length === 0 && fileList.length === 0 && (
        <Text type="warning" style={{ display: 'block', marginBottom: spacing.sm }}>
-          Bilag er pakraevet iht. Bogforingsloven § 6
+          Bilag er påkrævet iht. Bogføringsloven § 6
        </Text>
      )}

--- a/frontend/src/components/shared/ShortcutsHelpModal.tsx
+++ b/frontend/src/components/shared/ShortcutsHelpModal.tsx
@ -71,7 +71,7 @@ export function ShortcutsHelpModal({ open, onClose }: ShortcutsHelpModalProps) {
      <Divider style={{ margin: '16px 0' }} />

      <Text type="secondary" style={{ fontSize: 12 }}>
-        Tip: Tryk <Tag style={{ margin: '0 4px' }}>⌘K</Tag> for at abne
+        Tip: Tryk <Tag style={{ margin: '0 4px' }}>⌘K</Tag> for at åbne
        kommandopaletten og hurtigt navigere til enhver side.
      </Text>
    </Modal>
--- a/frontend/src/components/shared/StatusBadge.tsx
+++ b/frontend/src/components/shared/StatusBadge.tsx
@ -70,7 +70,7 @@ const statusConfig: Record<
  success: {
    color: 'green',
    icon: <CheckCircleOutlined />,
-    defaultText: 'Succces',
+    defaultText: 'Succes',
  },
  warning: {
    color: 'orange',
--- a/frontend/src/components/tables/DataTable.tsx
+++ b/frontend/src/components/tables/DataTable.tsx
@ -247,7 +247,7 @@ export default function DataTable<T extends { id: string }>({
          <Space>
            {toolbarActions}
            {refreshable && hookEnabled && (
-              <Tooltip title="Genindlaes">
+              <Tooltip title="Genindlæs">
                <Button
                  icon={<ReloadOutlined />}
                  onClick={() => refetch()}
--- a/frontend/src/lib/keyboardShortcuts.ts
+++ b/frontend/src/lib/keyboardShortcuts.ts
@ -153,7 +153,7 @@ export const shortcuts: Record<string, ShortcutDefinition> = {
  postDraft: {
    id: 'postDraft',
    keys: 'mod+enter',
-    label: 'Bogfor kladde',
+    label: 'Bogfør kladde',
    category: 'bogforing',
    scope: 'page',
  },
@ -290,7 +290,7 @@ export function formatShortcutForTooltip(shortcutId: string): string | null {
 export const categoryNames: Record<ShortcutCategory, string> = {
  global: 'Globale',
  navigation: 'Navigation',
-  bogforing: 'Bogforing',
+  bogforing: 'Bogføring',
  faktura: 'Fakturering',
  bank: 'Bank',
  kunder: 'Kunder',
--- a/frontend/src/lib/vatCodes.ts
+++ b/frontend/src/lib/vatCodes.ts
@ -13,9 +13,9 @@ import type { VATPeriodicitet } from '@/types/periods';
 /**
 * Complete VAT code configuration for Danish bookkeeping
 */
-export const VAT_CODE_CONFIG: Record<VATCode, VATCodeConfig> = {
-  S25: {
-    code: 'S25',
+export const VAT_CODE_CONFIG: Record<string, VATCodeConfig> = {
+  U25: {
+    code: 'U25',
    nameDanish: 'Udgående moms 25%',
    nameEnglish: 'Output VAT 25%',
    rate: 0.25,
@ -28,8 +28,34 @@ export const VAT_CODE_CONFIG: Record<VATCode, VATCodeConfig> = {
    deductible: false,
    description: 'Moms på salg af varer og ydelser i Danmark',
  },
-  K25: {
-    code: 'K25',
+  UEU: {
+    code: 'UEU',
+    nameDanish: 'EU-salg',
+    nameEnglish: 'EU sales (0%)',
+    rate: 0,
+    type: 'exempt',
+    affectsBoxes: {
+      basisBox: '2',
+    },
+    reverseCharge: false,
+    deductible: false,
+    description: 'Salg af varer og ydelser til andre EU-lande',
+  },
+  UEXP: {
+    code: 'UEXP',
+    nameDanish: 'Eksport',
+    nameEnglish: 'Export (0%)',
+    rate: 0,
+    type: 'exempt',
+    affectsBoxes: {
+      basisBox: '2',
+    },
+    reverseCharge: false,
+    deductible: false,
+    description: 'Eksport til lande uden for EU',
+  },
+  I25: {
+    code: 'I25',
    nameDanish: 'Indgående moms 25%',
    nameEnglish: 'Input VAT 25%',
    rate: 0.25,
@ -41,10 +67,10 @@ export const VAT_CODE_CONFIG: Record<VATCode, VATCodeConfig> = {
    deductible: true,
    description: 'Fradragsberettiget moms på køb',
  },
-  EU_VARE: {
-    code: 'EU_VARE',
-    nameDanish: 'EU-varekøb (erhvervelsesmoms)',
-    nameEnglish: 'EU goods purchase (acquisition VAT)',
+  IEUV: {
+    code: 'IEUV',
+    nameDanish: 'EU-erhvervelse varer',
+    nameEnglish: 'EU goods acquisition (reverse charge)',
    rate: 0.25,
    type: 'reverse_charge',
    affectsBoxes: {
@ -52,13 +78,13 @@ export const VAT_CODE_CONFIG: Record<VATCode, VATCodeConfig> = {
      basisBox: '3',
    },
    reverseCharge: true,
-    deductible: true, // Both output and input VAT
+    deductible: true,
    description: 'Køb af varer fra andre EU-lande med omvendt betalingspligt',
  },
-  EU_YDELSE: {
-    code: 'EU_YDELSE',
-    nameDanish: 'EU-ydelseskøb (omvendt betalingspligt)',
-    nameEnglish: 'EU services purchase (reverse charge)',
+  IEUY: {
+    code: 'IEUY',
+    nameDanish: 'EU-erhvervelse ydelser',
+    nameEnglish: 'EU services acquisition (reverse charge)',
    rate: 0.25,
    type: 'reverse_charge',
    affectsBoxes: {
@ -69,34 +95,43 @@ export const VAT_CODE_CONFIG: Record<VATCode, VATCodeConfig> = {
    deductible: true,
    description: 'Køb af ydelser fra udlandet med omvendt betalingspligt',
  },
-  MOMSFRI: {
-    code: 'MOMSFRI',
-    nameDanish: 'Momsfritaget',
-    nameEnglish: 'VAT exempt',
+  IVV: {
+    code: 'IVV',
+    nameDanish: 'Import varer verden',
+    nameEnglish: 'Import goods (world)',
    rate: 0,
-    type: 'exempt',
-    affectsBoxes: {
-      basisBox: '2',
-    },
+    type: 'input',
+    affectsBoxes: {},
    reverseCharge: false,
    deductible: false,
-    description: 'Momsfritaget salg (sundhed, undervisning, mv.)',
+    description: 'Import af varer fra lande uden for EU',
  },
-  EKSPORT: {
-    code: 'EKSPORT',
-    nameDanish: 'Eksport (0%)',
-    nameEnglish: 'Export (0%)',
+  IVY: {
+    code: 'IVY',
+    nameDanish: 'Import ydelser verden',
+    nameEnglish: 'Import services (world)',
    rate: 0,
-    type: 'exempt',
-    affectsBoxes: {
-      basisBox: '2',
-    },
+    type: 'input',
+    affectsBoxes: {},
    reverseCharge: false,
    deductible: false,
-    description: 'Eksport til lande uden for EU',
+    description: 'Import af ydelser fra lande uden for EU',
  },
-  NONE: {
-    code: 'NONE',
+  REP: {
+    code: 'REP',
+    nameDanish: 'Repræsentation',
+    nameEnglish: 'Representation (25%, 25% deductible)',
+    rate: 0.25,
+    type: 'input',
+    affectsBoxes: {
+      vatBox: 'B',
+    },
+    reverseCharge: false,
+    deductible: true,
+    description: 'Repræsentationsudgifter med 25% fradrag',
+  },
+  INGEN: {
+    code: 'INGEN',
    nameDanish: 'Ingen moms',
    nameEnglish: 'No VAT',
    rate: 0,
@ -231,7 +266,7 @@ export const SKAT_VAT_BOXES: Record<VATBoxId | BasisBoxId, SKATVATBox> = {
 */
 export const VAT_ACCOUNTS = {
  inputVAT: '5610',    // Indgående moms (fradrag)
-  outputVAT: '5710',   // Udgående moms (skyld)
+  outputVAT: '5611',   // Udgående moms (skyld)
  euVAT: '5620',       // EU-moms (erhvervelsesmoms)
 } as const;

@ -243,7 +278,7 @@ export const VAT_ACCOUNTS = {
 * Valid VAT code values for validation
 */
 export const VALID_VAT_CODES: readonly VATCode[] = [
-  'S25', 'K25', 'EU_VARE', 'EU_YDELSE', 'MOMSFRI', 'EKSPORT', 'NONE'
+  'U25', 'UEU', 'UEXP', 'I25', 'IEUV', 'IEUY', 'IVV', 'IVY', 'REP', 'INGEN'
 ] as const;

 /**
@ -254,17 +289,17 @@ export function isValidVATCode(code: unknown): code is VATCode {
 }

 /**
- * Safely convert a string to VATCode, returns 'NONE' if invalid
+ * Safely convert a string to VATCode, returns 'INGEN' if invalid
 */
 export function toVATCode(code: unknown): VATCode {
-  return isValidVATCode(code) ? code : 'NONE';
+  return isValidVATCode(code) ? code : 'INGEN';
 }

 /**
 * Get VAT code configuration
 */
 export function getVATCodeConfig(code: VATCode): VATCodeConfig {
-  return VAT_CODE_CONFIG[code];
+  return VAT_CODE_CONFIG[code] ?? VAT_CODE_CONFIG['INGEN'];
 }

 /**
@ -328,21 +363,21 @@ export function getSKATBox(boxId: VATBoxId | BasisBoxId): SKATVATBox {
 * Check if a VAT code is deductible (affects input VAT)
 */
 export function isVATDeductible(code: VATCode): boolean {
-  return VAT_CODE_CONFIG[code].deductible;
+  return VAT_CODE_CONFIG[code]?.deductible ?? false;
 }

 /**
 * Check if a VAT code is reverse charge
 */
 export function isReverseCharge(code: VATCode): boolean {
-  return VAT_CODE_CONFIG[code].reverseCharge;
+  return VAT_CODE_CONFIG[code]?.reverseCharge ?? false;
 }

 /**
 * Get VAT rate for a code
 */
 export function getVATRate(code: VATCode): number {
-  return VAT_CODE_CONFIG[code].rate;
+  return VAT_CODE_CONFIG[code]?.rate ?? 0;
 }

 /**
--- a/frontend/src/pages/Bankafstemning.tsx
+++ b/frontend/src/pages/Bankafstemning.tsx
@ -30,6 +30,7 @@ import {
  BulbOutlined,
 } from '@ant-design/icons';
 import dayjs from 'dayjs';
+import { useNavigate } from 'react-router-dom';
 import { useCompany } from '@/hooks/useCompany';
 import { useReconciliationStore } from '@/stores/reconciliationStore';
 import { useCompanyStore } from '@/stores/companyStore';
@ -67,6 +68,7 @@ interface MatchSuggestion {

 export default function Bankafstemning() {
  const { company } = useCompany();
+  const navigate = useNavigate();
  const { activeCompany } = useCompanyStore();

  // Fetch data from API
@ -218,10 +220,15 @@ export default function Bankafstemning() {
  if (isLoading) {
    return (
      <div>
+        <PageHeader
+          title="Bankafstemning"
+          subtitle={company?.name}
+          breadcrumbs={[{ title: 'Bank' }, { title: 'Bankafstemning' }]}
+        />
        <Skeleton active paragraph={{ rows: 2 }} />
        <Row gutter={16} style={{ marginTop: 16 }}>
-          <Col span={12}><Skeleton active paragraph={{ rows: 8 }} /></Col>
-          <Col span={12}><Skeleton active paragraph={{ rows: 8 }} /></Col>
+          <Col xs={24} lg={12}><Skeleton active paragraph={{ rows: 8 }} /></Col>
+          <Col xs={24} lg={12}><Skeleton active paragraph={{ rows: 8 }} /></Col>
        </Row>
      </div>
    );
@ -230,9 +237,20 @@ export default function Bankafstemning() {
  // Empty state - no bank connections
  if (bankAccounts.length === 0) {
    return (
-      <Empty
-        description="Ingen bankforbindelser. Opret forbindelse til din bank under Indstillinger."
-      />
+      <div>
+        <PageHeader
+          title="Bankafstemning"
+          subtitle={company?.name}
+          breadcrumbs={[{ title: 'Bank' }, { title: 'Bankafstemning' }]}
+        />
+        <Empty
+          description="Ingen bankforbindelser. Opret forbindelse til din bank under Indstillinger."
+        >
+          <Button type="primary" onClick={() => navigate('/indstillinger')}>
+            Gå til indstillinger
+          </Button>
+        </Empty>
+      </div>
    );
  }

@ -241,7 +259,7 @@ export default function Bankafstemning() {
      <PageHeader
        title="Bankafstemning"
        subtitle={company?.name}
-        breadcrumbs={[{ title: 'Bank', path: '/bankafstemning' }, { title: 'Bankafstemning' }]}
+        breadcrumbs={[{ title: 'Bank' }, { title: 'Bankafstemning' }]}
        extra={
          <Space>
            <Button
@ -283,13 +301,13 @@ export default function Bankafstemning() {
        <RangePicker
          value={dateRange}
          onChange={(dates) => setDateRange(dates as [dayjs.Dayjs, dayjs.Dayjs])}
-          format="DD/MM/YYYY"
+          format="DD-MM-YYYY"
        />
      </Space>

      {/* Summary */}
      <Row gutter={16} style={{ marginBottom: 16 }}>
-        <Col span={8}>
+        <Col xs={24} sm={8}>
          <Card size="small">
            <Statistic
              title="Bank (uafstemt)"
@ -302,7 +320,7 @@ export default function Bankafstemning() {
            />
          </Card>
        </Col>
-        <Col span={8}>
+        <Col xs={24} sm={8}>
          <Card size="small">
            <Statistic
              title="Bogføring (uafstemt)"
@ -315,10 +333,10 @@ export default function Bankafstemning() {
            />
          </Card>
        </Col>
-        <Col span={8}>
+        <Col xs={24} sm={8}>
          <Card size="small">
            <Statistic
-              title="Difference"
+              title="Differens"
              value={difference}
              precision={2}
              formatter={(value) => formatCurrency(value as number)}
@ -372,7 +390,7 @@ export default function Bankafstemning() {
      {/* Side-by-side panels */}
      <Row gutter={16}>
        {/* Bank Transactions */}
-        <Col span={12}>
+        <Col xs={24} lg={12}>
          <Card
            title={
              <Space>
@ -483,7 +501,7 @@ export default function Bankafstemning() {
        </Col>

        {/* Ledger Entries */}
-        <Col span={12}>
+        <Col xs={24} lg={12}>
          <Card
            title={
              <Space>
@ -496,7 +514,7 @@ export default function Bankafstemning() {
          >
            {ledgerEntries.length === 0 ? (
              <Empty
-                description="Ingen uafstemte bogføringsposter (API ikke implementeret endnu)"
+                description="Ingen uafstemte bogføringsposter"
                style={{ padding: 24 }}
              />
            ) : (
@ -650,7 +668,7 @@ export default function Bankafstemning() {
            label="Dato"
            rules={[{ required: true }]}
          >
-            <DatePicker format="DD/MM/YYYY" style={{ width: '100%' }} />
+            <DatePicker format="DD-MM-YYYY" style={{ width: '100%' }} />
          </Form.Item>
          <Form.Item
            name="description"
--- a/frontend/src/pages/CompanySetupWizard.tsx
+++ b/frontend/src/pages/CompanySetupWizard.tsx
@ -140,7 +140,6 @@ export default function CompanySetupWizard() {

      setCurrentStep(4); // Success step
    } catch (error) {
-      console.error('Company creation failed:', error);
      showError(error, 'Kunne ikke oprette virksomhed');
    }
  };
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@ -1,4 +1,4 @@
-import { Row, Col, Card, Statistic, Typography, Space, Tag, Progress, Skeleton, Empty } from 'antd';
+import { Row, Col, Card, Statistic, Typography, Space, Tag, Skeleton, Empty } from 'antd';
 import {
  BankOutlined,
  FileTextOutlined,
@ -154,7 +154,11 @@ export default function Dashboard() {
  if (isLoading) {
    return (
      <div>
-        <Skeleton active paragraph={{ rows: 1 }} />
+        <PageHeader
+          title="Dashboard"
+          subtitle={company?.name}
+          breadcrumbs={[{ title: 'Dashboard' }]}
+        />
        <Row gutter={[16, 16]} style={{ marginTop: 16 }}>
          <Col xs={24} sm={12} lg={6}>
            <Card size="small"><Skeleton active paragraph={{ rows: 2 }} /></Card>
@ -367,14 +371,8 @@ export default function Dashboard() {
                value={metrics.unreconciledCount}
                prefix={<FileTextOutlined />}
              />
-              <Progress
-                percent={metrics.unreconciledCount === 0 ? 100 : 75}
-                status="active"
-                strokeColor={accountingColors.balance}
-                style={{ marginTop: 16 }}
-              />
-              <Text type="secondary">
-                {metrics.unreconciledCount === 0 ? '100% afstemt' : 'Bankafstemning ikke implementeret endnu'}
+              <Text type="secondary" style={{ display: 'block', marginTop: 16 }}>
+                Bankafstemning er ikke tilgængelig endnu
              </Text>
            </div>
          </Card>
--- a/frontend/src/pages/Fakturaer.tsx
+++ b/frontend/src/pages/Fakturaer.tsx
@ -469,7 +469,7 @@ export default function Fakturaer() {
      <PageHeader
        title="Fakturaer"
        subtitle={company?.name}
-        breadcrumbs={[{ title: 'Fakturering', path: '/fakturaer' }, { title: 'Fakturaer' }]}
+        breadcrumbs={[{ title: 'Fakturering' }, { title: 'Fakturaer' }]}
        extra={
          <Button type="primary" icon={<PlusOutlined />} onClick={handleCreateInvoice}>
            Ny fakturakladde
--- a/frontend/src/pages/Kassekladde.tsx
+++ b/frontend/src/pages/Kassekladde.tsx
@ -199,7 +199,7 @@ export default function Kassekladde() {
          return <Tag color="red">Annulleret</Tag>;
        }
        return value ? (
-          <Tag color="green">Bogfort</Tag>
+          <Tag color="green">Bogført</Tag>
        ) : (
          <Tag color="orange">Kladde</Tag>
        );
@ -301,7 +301,7 @@ export default function Kassekladde() {
      case 'void':
        Modal.confirm({
          title: 'Annuller bilag',
-          content: `Er du sikker pa at du vil annullere bilag ${record.transactionNumber}?`,
+          content: `Er du sikker på at du vil annullere bilag ${record.transactionNumber}?`,
          okText: 'Annuller bilag',
          okType: 'danger',
          cancelText: 'Fortryd',
@ -352,7 +352,7 @@ export default function Kassekladde() {
      const validation = validateDoubleEntry(lines as TransactionLine[]);
      if (!validation.valid) {
        message.error(
-          `Debet (${formatCurrency(validation.totalDebit)}) skal vaere lig kredit (${formatCurrency(validation.totalCredit)})`
+          `Debet (${formatCurrency(validation.totalDebit)}) skal være lig kredit (${formatCurrency(validation.totalCredit)})`
        );
        return;
      }
@ -430,7 +430,7 @@ export default function Kassekladde() {

  const getStatusLabel = (status: JournalEntryDraftStatus): { label: string; color: string } => {
    switch (status) {
-      case 'posted': return { label: 'Bogfort', color: 'green' };
+      case 'posted': return { label: 'Bogført', color: 'green' };
      case 'discarded': return { label: 'Annulleret', color: 'red' };
      case 'draft': return { label: 'Kladde', color: 'orange' };
      case 'pending_review': return { label: 'Afventer gennemgang', color: 'blue' };
@ -447,7 +447,7 @@ export default function Kassekladde() {
        <PageHeader
          title="Kassekladde"
          subtitle={activeCompany?.name}
-          breadcrumbs={[{ title: 'Bogforing', path: '/kontooversigt' }, { title: 'Kassekladde' }]}
+          breadcrumbs={[{ title: 'Bogføring', path: '/kontooversigt' }, { title: 'Kassekladde' }]}
        />
        <Skeleton active paragraph={{ rows: 10 }} />
      </div>
@ -459,7 +459,7 @@ export default function Kassekladde() {
      <PageHeader
        title="Kassekladde"
        subtitle={activeCompany?.name}
-        breadcrumbs={[{ title: 'Bogforing', path: '/kontooversigt' }, { title: 'Kassekladde' }]}
+        breadcrumbs={[{ title: 'Bogføring', path: '/kontooversigt' }, { title: 'Kassekladde' }]}
        extra={
          <Button
            type="primary"
@ -504,7 +504,7 @@ export default function Kassekladde() {
              value={statusFilter}
              onChange={(value) => setStatusFilter(value ?? null)}
              options={[
-                { value: 'posted', label: 'Bogfort' },
+                { value: 'posted', label: 'Bogført' },
                { value: 'draft', label: 'Kladde' },
                { value: 'discarded', label: 'Annulleret' },
              ]}
@ -569,12 +569,12 @@ export default function Kassekladde() {
                </Tag>
              </Descriptions.Item>
              {detailDraft.isReconciled && detailDraft.postedAt && (
-                <Descriptions.Item label="Bogfort">
+                <Descriptions.Item label="Bogført">
                  {dayjs(detailDraft.postedAt).format('DD-MM-YYYY HH:mm')}
                </Descriptions.Item>
              )}
              {detailDraft.postedBy && (
-                <Descriptions.Item label="Bogfort af">
+                <Descriptions.Item label="Bogført af">
                  {detailDraft.postedBy}
                </Descriptions.Item>
              )}
@ -647,7 +647,7 @@ export default function Kassekladde() {
              <Form.Item
                name="date"
                label="Dato"
-                rules={[{ required: true, message: 'Vaelg dato' }]}
+                rules={[{ required: true, message: 'Vælg dato' }]}
                initialValue={dayjs()}
              >
                <DatePicker format="DD-MM-YYYY" style={{ width: 150 }} />
@ -683,7 +683,7 @@ export default function Kassekladde() {
                      <td style={{ padding: 4 }}>
                        <Select
                          style={{ width: '100%' }}
-                          placeholder="Vaelg konto"
+                          placeholder="Vælg konto"
                          showSearch
                          optionFilterProp="label"
                          value={line.accountId}
@ -752,7 +752,7 @@ export default function Kassekladde() {
                  <tr style={{ borderTop: '2px solid #f0f0f0' }}>
                    <td style={{ padding: 8 }}>
                      <Button type="dashed" size="small" onClick={handleAddLine}>
-                        + Tilf&oslash;j linje
+                        + Tilføj linje
                      </Button>
                    </td>
                    <td
@ -775,7 +775,7 @@ export default function Kassekladde() {
                    </td>
                    <td colSpan={2} style={{ padding: 8 }}>
                      {!balance.valid && (
-                        <Tooltip title={`Difference: ${formatCurrency(balance.difference)}`}>
+                        <Tooltip title={`Differens: ${formatCurrency(balance.difference)}`}>
                          <Tag color="red">Ubalance!</Tag>
                        </Tooltip>
                      )}
--- a/frontend/src/pages/Kontooversigt.tsx
+++ b/frontend/src/pages/Kontooversigt.tsx
@ -17,6 +17,7 @@ import {
  Switch,
  Divider,
  Descriptions,
+  Tooltip,
 } from 'antd';
 import {
  PlusOutlined,
@ -128,13 +129,6 @@ export default function Kontooversigt() {
    setIsDrawerOpen(true);
  };

-  const handleEditAccount = () => {
-    if (selectedAccount) {
-      form.setFieldsValue(selectedAccount);
-      setIsEditMode(true);
-    }
-  };
-
  const handleCloseDrawer = () => {
    setIsDrawerOpen(false);
    setIsEditMode(false);
@ -367,9 +361,11 @@ export default function Kontooversigt() {
        onClose={handleCloseDrawer}
        extra={
          !isEditMode && selectedAccount && (
-            <Button type="primary" icon={<EditOutlined />} onClick={handleEditAccount}>
-              Rediger
-            </Button>
+            <Tooltip title="Redigering kommer snart">
+              <Button type="primary" icon={<EditOutlined />} disabled>
+                Rediger
+              </Button>
+            </Tooltip>
          )
        }
        footer={
--- a/frontend/src/pages/Kreditnotaer.tsx
+++ b/frontend/src/pages/Kreditnotaer.tsx
@ -442,7 +442,7 @@ export default function Kreditnotaer() {
      <PageHeader
        title="Kreditnotaer"
        subtitle={company?.name}
-        breadcrumbs={[{ title: 'Salg' }, { title: 'Kreditnotaer' }]}
+        breadcrumbs={[{ title: 'Fakturering' }, { title: 'Kreditnotaer' }]}
        extra={
          <Button type="primary" icon={<PlusOutlined />} onClick={handleCreateCreditNote}>
            Ny kreditnota
--- a/frontend/src/pages/Kunder.tsx
+++ b/frontend/src/pages/Kunder.tsx
@ -173,8 +173,12 @@ export default function Kunder() {
        await updateCustomerMutation.mutateAsync(input);
        showSuccess('Kunde opdateret');
      } else {
+        if (!company) {
+          showError(new Error('Ingen virksomhed valgt'));
+          return;
+        }
        const input: CreateCustomerInput = {
-          companyId: company!.id,
+          companyId: company.id,
          customerType: values.customerType.toUpperCase() as 'BUSINESS' | 'PRIVATE',
          name: values.name,
          cvr: values.cvr || undefined,
--- a/frontend/src/pages/Loenforstaelse.tsx
+++ b/frontend/src/pages/Loenforstaelse.tsx
@ -13,6 +13,7 @@ import {
  Button,
  Descriptions,
  Collapse,
+  Tooltip,
 } from 'antd';
 import {
  TeamOutlined,
@ -279,7 +280,9 @@ export default function Loenforstaelse() {
        subtitle={company?.name}
        breadcrumbs={[{ title: 'Løn' }, { title: 'Lønforståelse' }]}
        extra={
-          <Button icon={<DownloadOutlined />}>Eksporter lønsedler</Button>
+          <Tooltip title="Eksport er endnu ikke implementeret">
+            <Button icon={<DownloadOutlined />} disabled>Eksporter lønsedler</Button>
+          </Tooltip>
        }
      />

--- a/frontend/src/pages/Ordrer.tsx
+++ b/frontend/src/pages/Ordrer.tsx
@ -9,6 +9,7 @@ import {
  Modal,
  Form,
  Input,
+  InputNumber,
  Select,
  Skeleton,
  Alert,
@ -696,7 +697,7 @@ export default function Ordrer() {
                            <Tag>{line.vatCode}</Tag>
                            {line.isInvoiced && line.invoicedAt && (
                              <Tag color="blue">
-                                Faktureret: {dayjs(line.invoicedAt).format('DD/MM/YYYY')}
+                                Faktureret: {dayjs(line.invoicedAt).format('DD-MM-YYYY')}
                              </Tag>
                            )}
                          </Space>
@ -876,7 +877,7 @@ export default function Ordrer() {
                label="Antal"
                rules={[{ required: true, message: 'Angiv antal' }]}
              >
-                <Input type="number" min={0} step={1} />
+                <InputNumber min={0} step={1} style={{ width: '100%' }} />
              </Form.Item>
            </Col>
            <Col span={8}>
@ -893,10 +894,10 @@ export default function Ordrer() {
                label="Enhedspris"
                rules={[{ required: true, message: 'Angiv pris' }]}
              >
-                <Input
-                  type="number"
+                <InputNumber
                  min={0}
                  step={0.01}
+                  style={{ width: '100%' }}
                  disabled={addLineMode === 'product' && !!selectedProductId}
                />
              </Form.Item>
@ -905,7 +906,7 @@ export default function Ordrer() {
          <Row gutter={16}>
            <Col span={12}>
              <Form.Item name="discountPercent" label="Rabat (%)">
-                <Input type="number" min={0} max={100} step={1} />
+                <InputNumber min={0} max={100} step={1} style={{ width: '100%' }} />
              </Form.Item>
            </Col>
            <Col span={12}>
--- a/frontend/src/pages/Produkter.tsx
+++ b/frontend/src/pages/Produkter.tsx
@ -173,8 +173,12 @@ export default function Produkter() {
        await updateProductMutation.mutateAsync(input);
        showSuccess('Produkt opdateret');
      } else {
+        if (!company) {
+          showError(new Error('Ingen virksomhed valgt'));
+          return;
+        }
        const input: CreateProductInput = {
-          companyId: company!.id,
+          companyId: company.id,
          productNumber: values.productNumber || undefined,
          name: values.name,
          description: values.description || undefined,
--- a/frontend/src/pages/Settings.tsx
+++ b/frontend/src/pages/Settings.tsx
@ -12,6 +12,7 @@ import {
  Divider,
  message,
  Space,
+  Tooltip,
 } from 'antd';
 import {
  SaveOutlined,
@ -61,19 +62,6 @@ export default function Settings() {
    }
  };

-  const handleSavePreferences = async () => {
-    try {
-      await preferencesForm.validateFields();
-      // TODO: Backend does not yet have a preferences mutation.
-      // Preferences like VAT period, auto-reconcile, etc. need a dedicated backend endpoint.
-      message.info('Præferencer er endnu ikke forbundet til backend');
-    } catch (error) {
-      if (error instanceof Error) {
-        message.error(`Fejl ved gemning: ${error.message}`);
-      }
-    }
-  };
-
  const tabItems = [
    {
      key: 'company',
@ -278,9 +266,11 @@ export default function Settings() {
            </Row>

            <div style={{ textAlign: 'right' }}>
-              <Button type="primary" icon={<SaveOutlined />} onClick={handleSavePreferences}>
-                Gem præferencer
-              </Button>
+              <Tooltip title="Præferencer er endnu ikke forbundet til backend">
+                <Button type="primary" icon={<SaveOutlined />} disabled>
+                  Gem præferencer
+                </Button>
+              </Tooltip>
            </div>
          </Form>
        </Card>
--- a/frontend/src/pages/UserSettings.tsx
+++ b/frontend/src/pages/UserSettings.tsx
@ -28,6 +28,7 @@ import {
 import type { UploadProps } from 'antd';
 import { spacing } from '@/styles/designTokens';
 import { PageHeader } from '@/components/shared/PageHeader';
+import { DemoDataDisclaimer } from '@/components/shared/DemoDataDisclaimer';

 const { Title, Text } = Typography;

@ -461,6 +462,8 @@ export default function UserSettings() {
        breadcrumbs={[{ title: 'Brugerindstillinger' }]}
      />

+      <DemoDataDisclaimer message="Brugerindstillinger er endnu ikke forbundet til backend. Ændringer gemmes ikke." />
+
      <Tabs items={tabItems} />
    </div>
  );
--- a/frontend/src/types/vat.ts
+++ b/frontend/src/types/vat.ts
@ -10,13 +10,24 @@ import type { VATPeriodicitet } from './periods';
 * VAT codes used in Danish bookkeeping
 */
 export type VATCode =
-  | 'S25'         // Salgsmoms 25% (udgaaende moms)
-  | 'K25'         // Koebsmoms 25% (indgaaende moms)
-  | 'EU_VARE'     // EU-varekoeb (reverse charge)
-  | 'EU_YDELSE'   // EU-ydelseskoeb (reverse charge)
-  | 'MOMSFRI'     // Momsfritaget (healthcare, education, etc.)
-  | 'EKSPORT'     // Eksport (0%)
-  | 'NONE';       // Ingen moms
+  | 'U25'         // Udgående moms 25% (salg)
+  | 'UEU'         // EU-salg (0%)
+  | 'UEXP'        // Eksport (0%)
+  | 'I25'         // Indgående moms 25% (køb)
+  | 'IEUV'        // EU-erhvervelse varer (reverse charge)
+  | 'IEUY'        // EU-erhvervelse ydelser (reverse charge)
+  | 'IVV'         // Import varer verden (0%)
+  | 'IVY'         // Import ydelser verden (0%)
+  | 'REP'         // Repræsentation (25%, 25% fradrag)
+  | 'INGEN'       // Ingen moms
+  // Legacy codes kept for backwards compatibility with other modules
+  | 'S25'         // @deprecated Use U25
+  | 'K25'         // @deprecated Use I25
+  | 'EU_VARE'     // @deprecated Use IEUV
+  | 'EU_YDELSE'   // @deprecated Use IEUY
+  | 'MOMSFRI'     // @deprecated Use INGEN
+  | 'EKSPORT'     // @deprecated Use UEXP
+  | 'NONE';       // @deprecated Use INGEN

 /**
 * VAT code type classification