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>

lib/push/web-push.ts

@@ -7,7 +7,7 @@ import webpush from 'web-push'
 // Configure web-push with VAPID keys
 const vapidPublicKey = process.env.NEXT_PUBLIC_VAPID_PUBLIC_KEY
 const vapidPrivateKey = process.env.VAPID_PRIVATE_KEY
-const vapidSubject = process.env.VAPID_SUBJECT || 'mailto:support@influencer-biz.se'
+const vapidSubject = process.env.VAPID_SUBJECT || 'mailto:support@erp-base.se'
 
 if (vapidPublicKey && vapidPrivateKey) {
   webpush.setVapidDetails(vapidSubject, vapidPublicKey, vapidPrivateKey)
@@ -191,35 +191,6 @@ export function createInvoicePayload(
   }
 }
 
-/**
- * Create notification payload for campaign deadline
- */
-export function createCampaignDeadlinePayload(
-  campaignName: string,
-  deliverableTitle: string,
-  dueDate: string,
-  daysUntil: number,
-  deadlineId: string
-): NotificationPayload {
-  const urgencyText = daysUntil === 0 ? 'IDAG!' : daysUntil === 1 ? 'imorgon' : `om ${daysUntil} dagar`
-
-  return {
-    title: `🎬 ${campaignName}`,
-    body: `${deliverableTitle} - leverans ${urgencyText}`,
-    icon: '/icons/icon-192.png',
-    badge: '/icons/badge-72.png',
-    tag: `campaign-deadline-${deadlineId}`,
-    data: {
-      url: '/calendar',
-      type: 'campaign_deadline',
-      id: deadlineId,
-    },
-    actions: [
-      { action: 'view', title: 'Visa' },
-    ],
-  }
-}
-
 /**
  * Format date for notifications
  */