feat: arcim migration wizard UX, import fixes, Sentry setup (#22)

* feat: import system improvements, INK2 fix, and Swedish text corrections

- SIE parser: Windows-1252 and CP437 encoding detection and decoding
- Bank file parser: add Nordea Business (Företag) CSV format
- Bank file parser: improve format detection for SEB, Länsförsäkringar, generic CSV
- INK2 engine: calculate årets resultat (7222) from income statement for open fiscal years
- Dashboard: parallel Supabase queries, simplified dashboard page
- Fix Swedish characters (å, ä, ö) in BAS data descriptions, validation messages, AI consent disclosures
- Import wizard UI improvements across all steps
- Migration: add 'bas_range' match type to sie_account_mappings constraint
- Extensive new tests for SIE parser encoding and bank file parser

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

* feat: arcim migration wizard UX fixes, Sentry setup, and extension scaffolding

Arcim migration wizard improvements:
- Progress bar now excludes non-interactive steps (migrating/result)
- Fix OAuth text to match target="_blank" behavior (new tab, not redirect)
- Display month names instead of "Månad X" in preview
- Fix Swedish typo "förifylla" in no-company-info message
- Replace native checkboxes with shadcn Switch in options step
- Add ConfirmationDialog before starting migration
- Show progress percentage during migration
- Add "Nästa steg" guidance and navigation links in result step
- Add "Försök igen" button in error state (returns to options)
- Add Bokio company ID help text (GUID from URL)
- Add Fortnox integration add-on hint on connection failure

Also includes: SIE import system improvements, INK2 fixes, Swedish text
corrections, Sentry error tracking setup, and arcim-migration extension
scaffolding.

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

* fix: address PR review feedback

- Fix OAuth error recovery blank page (restore provider from URL params)
- Pass real userId to MigrationWizard instead of empty string
- Remove ~50 debug console.log statements from sie-import.ts
- Fix comment referencing account 3740 → 3741

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

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

components/SentryIdentify.tsx

@@ -0,0 +1,21 @@
+"use client";
+
+import * as Sentry from "@sentry/nextjs";
+import { useEffect } from "react";
+
+export function SentryIdentify({
+  userId,
+  email,
+}: {
+  userId: string;
+  email?: string;
+}) {
+  useEffect(() => {
+    Sentry.setUser({ id: userId, email });
+    return () => {
+      Sentry.setUser(null);
+    };
+  }, [userId, email]);
+
+  return null;
+}

components/dashboard/DashboardContent.tsx

@@ -252,7 +252,6 @@ export default function DashboardContent({ firstName, settings, summary, onboard
             hasCustomers={onboardingProgress.hasCustomers}
             hasInvoices={onboardingProgress.hasInvoices}
             hasBankConnected={onboardingProgress.hasBankConnected}
-            hasReceipts={onboardingProgress.hasReceipts}
           />
         </section>
       )}

components/import/SIEPreviewStep.tsx

@@ -13,6 +13,7 @@ import {
   XCircle,
   ArrowRight,
   BarChart3,
+  Info,
 } from 'lucide-react'
 import type { ImportPreview, ParseIssue } from '@/lib/import/types'
 
@@ -226,6 +227,16 @@ export default function SIEPreviewStep({
         </CardContent>
       </Card>
 
+      {/* Excluded system accounts info */}
+      {preview.excludedSystemAccounts.length > 0 && (
+        <div className="flex items-start gap-2 rounded-lg border bg-muted/50 px-4 py-3 text-sm text-muted-foreground">
+          <Info className="h-4 w-4 mt-0.5 flex-shrink-0" />
+          <span>
+            {preview.excludedSystemAccounts.length} internt systemkonto från källsystemet exkluderades ({preview.excludedSystemAccounts.map((a) => a.number).join(', ')}) — inte bokföringskonton
+          </span>
+        </div>
+      )}
+
       {/* Create missing accounts */}
       {missingAccounts.length > 0 && (
         <Card className="border-primary/50">

components/onboarding/NewUserChecklist.tsx

@@ -25,7 +25,6 @@ interface NewUserChecklistProps {
   hasCustomers: boolean
   hasInvoices: boolean
   hasBankConnected: boolean
-  hasReceipts: boolean
   onDismiss?: () => void
   className?: string
 }
@@ -36,7 +35,6 @@ export default function NewUserChecklist({
   hasCustomers,
   hasInvoices,
   hasBankConnected,
-  hasReceipts,
   onDismiss,
   className,
 }: NewUserChecklistProps) {
@@ -78,13 +76,6 @@ export default function NewUserChecklist({
       href: '/import',
       completed: hasBankConnected,
     },
-    {
-      id: 'receipt',
-      label: 'Skanna ditt första kvitto',
-      description: 'Fotografera för automatisk bokföring',
-      href: '/receipts/scan',
-      completed: hasReceipts,
-    },
   ]
 
   const completedCount = items.filter((item) => item.completed).length