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>

lib/extensions/_generated/enabled-extensions.ts

@@ -3,4 +3,5 @@
 export const ENABLED_EXTENSION_IDS: ReadonlySet<string> = new Set([
   'enable-banking',
   'email',
+  'arcim-migration',
 ])

lib/extensions/_generated/extension-list.ts

@@ -2,8 +2,10 @@
 import type { Extension } from '../types'
 import { enableBankingExtension } from '@/extensions/general/enable-banking'
 import { emailExtension } from '@/extensions/general/email'
+import { arcimMigrationExtension } from '@/extensions/general/arcim-migration'
 
 export const FIRST_PARTY_EXTENSIONS: Extension[] = [
   enableBankingExtension,
   emailExtension,
+  arcimMigrationExtension,
 ]

lib/extensions/_generated/sector-definitions.ts

@@ -30,5 +30,15 @@ export const EXTENSION_DEFINITIONS: Record<string, ExtensionDefinition[]> = {
                 "company_settings"
           ]
     },
+    {
+          "slug": "arcim-migration",
+          "name": "Systemmigration (Arcim Sync)",
+          "sector": "general",
+          "category": "import",
+          "icon": "ArrowRightLeft",
+          "dataPattern": "manual",
+          "description": "Migrera bokföring från Fortnox, Visma, Bokio, Björn Lundén eller Briox",
+          "longDescription": "Flytta all bokföringsdata från ditt gamla system till gnubok. Importerar kontoplan, verifikationer, kunder, leverantörer och öppna fakturor automatiskt via säker API-integration."
+    },
   ],
 }

lib/extensions/_generated/workspace-map.tsx

@@ -5,4 +5,5 @@ import type { WorkspaceComponentProps } from '../workspace-registry'
 
 export const WORKSPACES: Record<string, ComponentType<WorkspaceComponentProps>> = {
   'general/enable-banking': dynamic(() => import('@/components/extensions/general/EnableBankingWorkspace')),
+  'general/arcim-migration': dynamic(() => import('@/components/extensions/general/ArcimMigrationWorkspace')),
 }