Refactor to generic ERP base

Remove influencer-specific features (campaigns, TikTok, gifts, shadow ledger,
contracts, briefings) and consolidate into a clean ERP foundation with core
bookkeeping, invoicing, receipts, tax reporting, and calendar functionality.
Reorganize database migrations into a clean numbered sequence.

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

components/onboarding/Step1EntityType.tsx

@@ -4,7 +4,7 @@ import { useState } from 'react'
 import { Button } from '@/components/ui/button'
 import { Card } from '@/components/ui/card'
 import { Badge } from '@/components/ui/badge'
-import { Loader2, ArrowRight, Building2, User, Users, Check } from 'lucide-react'
+import { Loader2, ArrowRight, Building2, User, Check } from 'lucide-react'
 import { cn } from '@/lib/utils'
 import type { EntityType } from '@/types'
 
@@ -33,12 +33,6 @@ const entityOptions: {
     description: 'Du har ett registrerat AB med organisationsnummer',
     icon: Building2,
   },
-  {
-    value: 'light',
-    label: 'Egenanställd',
-    description: 'Du arbetar via egenanställningsföretag som Frilans Finans, Cool Company eller Gigapay',
-    icon: Users,
-  },
 ]
 
 export default function Step1EntityType({ initialData, onNext, isSaving }: Step1Props) {