Bug/accounting suggestion (#456)

* feat: add bike benefit handling and optional vacation accrual

- Introduced bike benefit (cykelförmån) with calculations for annual market value and monthly taxable value.
- Updated schemas to include new benefit types and validation rules.
- Implemented API routes for creating, updating, and deleting employee benefits.
- Enhanced salary calculation logic to accommodate new vacation rule options, including a 'none' option for no accrual.
- Added UI components for managing employee benefits, including input for bike benefit specifics.
- Created database migrations for employee benefits and updated salary line items to support new benefit types.

* chore: remove Langfuse env var checks

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat: enhance OAuth callback URL handling and update default scopes for Visma integration

* feat: remove trade_name field and simplify company naming in invoices

* refactor: destructure canWrite from useCanWrite for consistency across components

* feat: enhance PATCH endpoint to validate existing benefits and handle bike benefit updates

* feat: add missing label for bike benefit in salary line item types

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/helpers.ts

@@ -494,7 +494,6 @@ export function makeCompanySettings(
     company_id: 'company-1',
     entity_type: 'enskild_firma',
     company_name: 'Test Firma',
-    trade_name: null,
     org_number: '199001011234',
     address_line1: 'Testgatan 1',
     address_line2: null,
@@ -531,6 +530,7 @@ export function makeCompanySettings(
     invoice_show_ocr: true,
     invoice_show_bankgiro: true,
     invoice_show_plusgiro: true,
+    invoice_show_logo: true,
     invoice_late_fee_text: null,
     invoice_credit_terms_text: null,
     logo_url: null,