Supp/invoice bfl errors (#390)

* feat(accounting): update accounting method validation and messaging for aktiebolag and enskild firma

* Remove AI subsystem and related code

- Deleted AI proposals and requests persistence logic from `lib/ai/proposals/persist.ts`.
- Removed re-validation logic for proposals in `lib/ai/proposals/re-validate.ts`.
- Cleaned up schemas related to AI flows in `lib/api/schemas.ts`.
- Removed AI-related fields from bookkeeping engine in `lib/bookkeeping/engine.ts`.
- Eliminated AI event types from `lib/events/types.ts`.
- Updated tests to reflect the removal of AI-related functionality in `lib/extensions/__tests__/sectors.test.ts`.
- Adjusted initialization logic in `lib/init.ts` to exclude AI proposal handler registration.
- Cleaned up transaction ingestion logic in `lib/transactions/ingest.ts` to remove AI flow checks.
- Updated helper functions in `tests/helpers.ts` to remove AI-related settings.
- Removed AI-related types and interfaces from `types/index.ts`.
- Added migration script to drop AI-related tables and settings from the database.

* fix(migrations): ensure foreign key constraint is dropped before removing AI tables

* feat(invoice-inbox): implement deterministic invoice field extraction and inbox provisioning

- Added `extract-invoice-fields.ts` for extracting fields from PDF invoices using regex and pdfjs-dist, replacing the previous AI classifier.
- Introduced `inbox-provisioning.ts` to manage company inbox addresses and rotation of inboxes using Supabase RPCs.
- Created `resend-inbound.ts` for handling inbound email events and attachments via the Resend API.
- Defined the extension manifest for the invoice inbox, specifying required environment variables and descriptions.
- Migrated database schema to remove AI-related columns and tighten the status enum in `invoice_inbox_items`.

* feat(invoice-inbox): remove AI-specific columns and tighten status enum

* fix(skattekonto): remove manual entry creation reference from transaction input

* fix(schemas): remove accounting method validation for aktiebolag in UpdateSettingsSchema

lib/events/types.ts

@@ -10,8 +10,6 @@ import type {
   ReconciliationMethod,
   InvoiceInboxItem,
   SupplierInvoice,
-  AIProposal,
-  AIRequest,
 } from '@/types'
 
 // ============================================================
@@ -78,8 +76,6 @@ export type CoreEvent =
   | { type: 'supplier_invoice.received'; payload: { inboxItem: InvoiceInboxItem; userId: string; companyId: string } }
   | { type: 'supplier_invoice.extracted'; payload: { inboxItem: InvoiceInboxItem; confidence: number; userId: string; companyId: string } }
   | { type: 'supplier_invoice.confirmed'; payload: { inboxItem: InvoiceInboxItem; supplierInvoice: SupplierInvoice; userId: string; companyId: string } }
-  // Generic inbox classification (fires for all document_types after classify)
-  | { type: 'inbox_item.classified'; payload: { inboxItem: InvoiceInboxItem; documentType: 'supplier_invoice' | 'receipt' | 'government_letter' | 'unknown'; confidence: number | null; correlationId: string; userId: string; companyId: string } }
   // Salary
   | { type: 'salary_run.created'; payload: { salaryRunId: string; periodYear: number; periodMonth: number; userId: string; companyId: string } }
   | { type: 'salary_run.approved'; payload: { salaryRunId: string; approvedBy: string; userId: string; companyId: string } }
@@ -94,11 +90,6 @@ export type CoreEvent =
   // Company & account lifecycle
   | { type: 'company.deleted'; payload: { companyId: string; userId: string; archivedAt: string } }
   | { type: 'account.deleted'; payload: { userId: string; deletedAt: string } }
-  // AI agent flow (receipts v1)
-  | { type: 'ai_proposal.generated'; payload: { proposal: AIProposal; userId: string; companyId: string } }
-  | { type: 'ai_proposal.accepted'; payload: { proposal: AIProposal; appliedEntry: JournalEntry | null; userId: string; companyId: string } }
-  | { type: 'ai_proposal.rejected'; payload: { proposal: AIProposal; userId: string; companyId: string } }
-  | { type: 'ai_request.created'; payload: { request: AIRequest; userId: string; companyId: string } }
 
 // ============================================================
 // Helper Types