diff --git a/app/(dashboard)/invoices/[id]/page.tsx b/app/(dashboard)/invoices/[id]/page.tsx
index 92d814c2..3d63d039 100644
--- a/app/(dashboard)/invoices/[id]/page.tsx
+++ b/app/(dashboard)/invoices/[id]/page.tsx
@@ -29,6 +29,7 @@ import {
   Bell,
   AlertTriangle,
   MessageSquare,
+  Trash2,
 } from 'lucide-react'
 import type { Invoice, InvoiceItem, Customer, InvoiceStatus, InvoiceReminder, InvoiceDocumentType } from '@/types'
 
@@ -875,12 +876,12 @@ export default function InvoiceDetailPage({ params }: { params: Promise<{ id: st
                     )}
                     <Button
                       variant="outline"
-                      className="w-full"
+                      className="w-full text-destructive hover:text-destructive"
                       onClick={() => updateStatus('cancelled')}
                       disabled={isUpdating}
                     >
-                      <XCircle className="mr-2 h-4 w-4" />
-                      Makulera
+                      <Trash2 className="mr-2 h-4 w-4" />
+                      Ta bort utkast
                     </Button>
                   </>
                 )}
diff --git a/app/(dashboard)/invoices/new/page.tsx b/app/(dashboard)/invoices/new/page.tsx
index 943af255..061f7764 100644
--- a/app/(dashboard)/invoices/new/page.tsx
+++ b/app/(dashboard)/invoices/new/page.tsx
@@ -49,7 +49,7 @@ const schema = z.object({
 type FormData = z.infer<typeof schema>
 
 const currencies: Currency[] = ['SEK', 'EUR', 'USD', 'GBP', 'NOK', 'DKK']
-const units = ['st', 'tim', 'dag', 'mån', 'km', 'kg']
+const units = ['st', 'tim', 'dag', 'månad', 'km', 'kg']
 
 export default function NewInvoicePage() {
   const router = useRouter()
diff --git a/app/(dashboard)/suppliers/[id]/page.tsx b/app/(dashboard)/suppliers/[id]/page.tsx
index d28774d9..030fb7a1 100644
--- a/app/(dashboard)/suppliers/[id]/page.tsx
+++ b/app/(dashboard)/suppliers/[id]/page.tsx
@@ -68,7 +68,8 @@ export default function SupplierDetailPage() {
     })
     const result = await res.json()
     if (!res.ok) {
-      toast({ title: 'Fel', description: result.error, variant: 'destructive' })
+      const fieldErrors = result.errors?.map((e: { field: string; message: string }) => `${e.field}: ${e.message}`).join(', ')
+      toast({ title: 'Fel', description: fieldErrors || result.error || 'Kunde inte uppdatera leverantör', variant: 'destructive' })
     } else {
       toast({ title: 'Sparat', description: 'Leverantören har uppdaterats' })
       setSupplier({ ...result.data, stats: supplier?.stats })
diff --git a/app/(dashboard)/suppliers/page.tsx b/app/(dashboard)/suppliers/page.tsx
index 93ef9d39..1012c11f 100644
--- a/app/(dashboard)/suppliers/page.tsx
+++ b/app/(dashboard)/suppliers/page.tsx
@@ -69,9 +69,10 @@ export default function SuppliersPage() {
     const result = await response.json()
 
     if (!response.ok) {
+      const fieldErrors = result.errors?.map((e: { field: string; message: string }) => `${e.field}: ${e.message}`).join(', ')
       toast({
         title: 'Fel',
-        description: result.error || 'Kunde inte skapa leverantör',
+        description: fieldErrors || result.error || 'Kunde inte skapa leverantör',
         variant: 'destructive',
       })
     } else {
diff --git a/components/dashboard/DashboardNav.tsx b/components/dashboard/DashboardNav.tsx
index 2b16da18..ca147a84 100644
--- a/components/dashboard/DashboardNav.tsx
+++ b/components/dashboard/DashboardNav.tsx
@@ -42,6 +42,7 @@ interface NavItem {
   icon: typeof LayoutDashboard
   group: string
   modes?: EntityType[] // If set, only visible for these entity types. If not set, visible to all.
+  hidden?: boolean // Temporarily hide from sidebar
 }
 
 // All nav items for sidebar and mobile drawer
@@ -50,8 +51,9 @@ const navItems: NavItem[] = [
   { href: '/deadlines', label: 'Deadlines', icon: Calendar, group: 'main' },
   { href: '/invoices', label: 'Fakturor', icon: Receipt, group: 'finans' },
   { href: '/customers', label: 'Kunder', icon: Users, group: 'finans' },
-  { href: '/suppliers', label: 'Leverantörer', icon: Building2, group: 'finans' },
-  { href: '/supplier-invoices', label: 'Leverantörsfakturor', icon: FileInput, group: 'finans' },
+  // Temporarily hidden pending module rework (see feedback #49)
+  { href: '/suppliers', label: 'Leverantörer', icon: Building2, group: 'finans', hidden: true },
+  { href: '/supplier-invoices', label: 'Leverantörsfakturor', icon: FileInput, group: 'finans', hidden: true },
   { href: '/transactions', label: 'Transaktioner', icon: ArrowLeftRight, group: 'finans' },
   { href: '/bookkeeping', label: 'Bokföring', icon: BookOpen, group: 'finans' },
   { href: '/reports', label: 'Rapporter', icon: BarChart3, group: 'finans' },
@@ -131,9 +133,9 @@ export default function DashboardNav({ companyName, entityType, enabledExtension
 
   const closeMobileMenu = () => setIsMobileMenuOpen(false)
 
-  // Filter nav items by entity type
+  // Filter nav items by entity type and hidden flag
   const filteredItems = navItems.filter(item =>
-    !item.modes || item.modes.includes(entityType)
+    !item.hidden && (!item.modes || item.modes.includes(entityType))
   )
 
   const mainItems = filteredItems.filter(i => i.group === 'main')
diff --git a/extensions.config.json b/extensions.config.json
index 0a36cc74..c61a9d8d 100644
--- a/extensions.config.json
+++ b/extensions.config.json
@@ -1 +1 @@
-{"$schema":"./extensions.schema.json","extensions":["enable-banking","ai-categorization","ai-chat"]}
+{"$schema":"./extensions.schema.json","extensions":["enable-banking","ai-categorization","ai-chat","email"]}
diff --git a/extensions/general/ai-categorization/categorizer.ts b/extensions/general/ai-categorization/categorizer.ts
index 3af9f60f..1253bec7 100644
--- a/extensions/general/ai-categorization/categorizer.ts
+++ b/extensions/general/ai-categorization/categorizer.ts
@@ -110,6 +110,8 @@ function getCategoryAccountMap(entityType: EntityType): Record<string, { account
     expense_bank_fees: { account: '6570', label: 'Bankavgifter' },
     expense_card_fees: { account: '6570', label: 'Kortavgifter' },
     expense_currency_exchange: { account: '7960', label: 'Valutakursförluster' },
+    expense_interest: { account: '8410', label: 'Räntekostnader' },
+    financial_loan_repayment: { account: '2350', label: 'Amortering lån (kreditinstitut)' },
     expense_other: { account: '6991', label: 'Övriga kostnader' },
   }
 }
@@ -275,7 +277,8 @@ REGLER:
 6. taxCode: "MPI" för avdragsgilla affärskostnader med moms, "MP1" för intäkter med moms, null för momsfria
 7. templateId är OBLIGATORISKT — välj alltid den mest passande mallen från listan ovan, även för alternativa förslag
 8. isPrivate ska ALLTID vara false — användaren avgör själv vad som är privat
-9. Ange TVÅ förslag per transaktion: ett primärt (mest troligt) och ett alternativt (näst mest troligt, annan kategori, lägre confidence). Båda ska vara affärskategorier.`
+9. Ange TVÅ förslag per transaktion: ett primärt (mest troligt) och ett alternativt (näst mest troligt, annan kategori, lägre confidence). Båda ska vara affärskategorier.
+10. SKULDER: Konto 2440 (leverantörsskulder) ska BARA användas för leverantörsfakturor. Lån/amorteringar från banker eller kreditinstitut (Almi, Nordea, SEB, Handelsbanken, Swedbank, etc.) ska använda 2350 (skulder till kreditinstitut) via mallen financial_loan_repayment. Räntebetalningar ska använda 8410 (räntekostnader).`
 
     const historyContext =
       context.recentHistory.length > 0
diff --git a/extensions/general/ai-categorization/lib/description-analyzer.ts b/extensions/general/ai-categorization/lib/description-analyzer.ts
index 2df7c254..ec33878a 100644
--- a/extensions/general/ai-categorization/lib/description-analyzer.ts
+++ b/extensions/general/ai-categorization/lib/description-analyzer.ts
@@ -106,7 +106,8 @@ VANLIGA BAS-KONTON:
 Utgifter: 5010 Lokalhyra | 5410 Forbrukningsinventarier | 5420 Programvara | 5460 Forbrukningsvaror | 5611 Bil/drivmedel | 5800 Resekostnader | 5910 Annonsering | 6071 Representation mat | 6200 Telefon/internet | 6530 Redovisning/konsult | 6570 Bankavgifter | 6991 Ovriga kostnader | ${entityType === 'aktiebolag' ? '7610' : '6991'} Utbildning
 Intakter: 3001 Forsaljning 25% | 3002 Forsaljning 12% | 3003 Forsaljning 6% | 3305 Export | 3308 EU-tjanster | 3900 Ovriga intakter
 Moms: 2611 Utg moms 25% | 2621 Utg moms 12% | 2631 Utg moms 6% | 2641 Ing moms | 2645 Beraknad ing moms
-Ovrigt: 1510 Kundfordringar | 1930 Foretagskonto | 2440 Leverantorsskulder | ${privateAccount} Privat
+Skulder: 2350 Skulder till kreditinstitut (banklan, Almi) | 2440 Leverantorsskulder (ENBART for leverantorsfakturor)
+Ovrigt: 1510 Kundfordringar | 1930 Foretagskonto | 8410 Rantekostnader | ${privateAccount} Privat
 
 MOMSREGLER:
 - standard_25: Normala varor/tjanster (25%)
diff --git a/lib/extensions/_generated/enabled-extensions.ts b/lib/extensions/_generated/enabled-extensions.ts
index 00d6eabe..5aa8e317 100644
--- a/lib/extensions/_generated/enabled-extensions.ts
+++ b/lib/extensions/_generated/enabled-extensions.ts
@@ -4,4 +4,5 @@ export const ENABLED_EXTENSION_IDS: ReadonlySet<string> = new Set([
   'enable-banking',
   'ai-categorization',
   'ai-chat',
+  'email',
 ])
diff --git a/lib/extensions/_generated/extension-list.ts b/lib/extensions/_generated/extension-list.ts
index 8242f2d0..eeb40d7e 100644
--- a/lib/extensions/_generated/extension-list.ts
+++ b/lib/extensions/_generated/extension-list.ts
@@ -3,9 +3,11 @@ import type { Extension } from '../types'
 import { enableBankingExtension } from '@/extensions/general/enable-banking'
 import { aiCategorizationExtension } from '@/extensions/general/ai-categorization'
 import { aiChatExtension } from '@/extensions/general/ai-chat'
+import { emailExtension } from '@/extensions/general/email'
 
 export const FIRST_PARTY_EXTENSIONS: Extension[] = [
   enableBankingExtension,
   aiCategorizationExtension,
   aiChatExtension,
+  emailExtension,
 ]
diff --git a/lib/extensions/_generated/sector-definitions.ts b/lib/extensions/_generated/sector-definitions.ts
index df688fef..bb8affc4 100644
--- a/lib/extensions/_generated/sector-definitions.ts
+++ b/lib/extensions/_generated/sector-definitions.ts
@@ -57,5 +57,20 @@ export const EXTENSION_DEFINITIONS: Record<string, ExtensionDefinition[]> = {
                 "event": "open-ai-chat"
           }
     },
+    {
+          "slug": "email",
+          "name": "E-post (Resend)",
+          "sector": "general",
+          "category": "operations",
+          "icon": "Mail",
+          "dataPattern": "core",
+          "description": "Skicka fakturor och påminnelser via e-post",
+          "longDescription": "Aktiverar e-postfunktioner: skicka fakturor till kunder, automatiska betalningspåminnelser (15/30/45 dagar), och e-postmeddelanden. Kräver ett Resend-konto med verifierad domän.",
+          "readsCoreTables": [
+                "invoices",
+                "customers",
+                "company_settings"
+          ]
+    },
   ],
 }