feat: import system improvements, INK2 fix, and Swedish text corrections (#10)

- 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>

lib/extensions/__tests__/validation.test.ts

@@ -35,11 +35,11 @@ describe('validateSwedishPersonalNumber', () => {
   })
 
   it('rejects invalid month', () => {
-    expect(validateSwedishPersonalNumber('199913011234')).toBe('Ogiltig manad')
+    expect(validateSwedishPersonalNumber('199913011234')).toBe('Ogiltig månad')
   })
 
   it('rejects month 00', () => {
-    expect(validateSwedishPersonalNumber('199900011234')).toBe('Ogiltig manad')
+    expect(validateSwedishPersonalNumber('199900011234')).toBe('Ogiltig månad')
   })
 
   it('rejects invalid day', () => {
@@ -51,12 +51,12 @@ describe('validateSwedishPersonalNumber', () => {
   })
 
   it('rejects year before 1900', () => {
-    expect(validateSwedishPersonalNumber('189901011234')).toBe('Ogiltigt ar')
+    expect(validateSwedishPersonalNumber('189901011234')).toBe('Ogiltigt år')
   })
 
   it('rejects future year', () => {
     const futureYear = new Date().getFullYear() + 1
-    expect(validateSwedishPersonalNumber(`${futureYear}01011234`)).toBe('Ogiltigt ar')
+    expect(validateSwedishPersonalNumber(`${futureYear}01011234`)).toBe('Ogiltigt år')
   })
 
   it('rejects invalid Luhn checksum', () => {

lib/extensions/ai-consent.ts

@@ -33,18 +33,18 @@ export const AI_DATA_DISCLOSURES: Record<AiExtensionId, {
 }> = {
   'receipt-ocr': {
     provider: 'Anthropic',
-    dataTypes: ['Kvittobilder', 'Extraherad text fran kvitton'],
-    purpose: 'Automatisk avlasning och kategorisering av kvitton',
+    dataTypes: ['Kvittobilder', 'Extraherad text från kvitton'],
+    purpose: 'Automatisk avläsning och kategorisering av kvitton',
   },
   'ai-categorization': {
     provider: 'Anthropic, OpenAI',
-    dataTypes: ['Transaktionsbeskrivningar', 'Belopp', 'Bokformallar'],
+    dataTypes: ['Transaktionsbeskrivningar', 'Belopp', 'Bokförmallar'],
     purpose: 'Automatisk kategorisering av banktransaktioner',
   },
   'ai-chat': {
     provider: 'Anthropic, OpenAI',
-    dataTypes: ['Chattmeddelanden', 'Bokforingsdata som refereras i chatten'],
-    purpose: 'AI-assistent for bokforingsfragor',
+    dataTypes: ['Chattmeddelanden', 'Bokföringsdata som refereras i chatten'],
+    purpose: 'AI-assistent för bokföringsfrågor',
   },
 }
 

lib/extensions/validation.ts

@@ -15,9 +15,9 @@ export function validateSwedishPersonalNumber(pnr: string): string | null {
   const month = parseInt(cleaned.slice(4, 6))
   const day = parseInt(cleaned.slice(6, 8))
 
-  if (month < 1 || month > 12) return 'Ogiltig manad'
+  if (month < 1 || month > 12) return 'Ogiltig månad'
   if (day < 1 || day > 31) return 'Ogiltig dag'
-  if (year < 1900 || year > new Date().getFullYear()) return 'Ogiltigt ar'
+  if (year < 1900 || year > new Date().getFullYear()) return 'Ogiltigt år'
 
   // Luhn check on the last 10 digits (YYMMDDXXXX)
   const luhnDigits = cleaned.slice(2)