feat: invoice inbox extension — conversion, workspace UI, Gmail UX (#255)

* feat: invoice inbox extension — conversion, workspace UI, Gmail UX

Complete the invoice-inbox extension with full end-to-end flow:

- Add POST /items/:id/convert route to create supplier invoices from
  classified inbox items, with accrual journal entry and document linking
- Add PATCH /items/:id/reject route to dismiss non-relevant items
- Add workspace UI at /e/general/invoice-inbox with items table,
  status filtering, convert dialog, and match confirmation
- Add Gmail connection banner (connect/disconnect/status) in workspace
- Add one-click supplier creation from AI-extracted data
- Add transaction auto-matching with fuzzy name + currency-aware amount
- Add event emission (received, extracted, confirmed) on classification
- Redirect OAuth callback to workspace instead of /settings/banking
- Fix extension catch-all body clone for POST routes with path params
- Fix duplicate Löner nav entry from salary module merge
- Remove summary cards from expenses and supplier invoices pages
- Fix supplier-invoices/new amount input (valueAsNumber → Controller)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: address Greptile review — company_id filters, currency guard, skipAuth clone

- Add company_id filter to reject route update (defense in depth)
- Add company_id filter to document_attachments journal entry link
- Guard sekMatch with tx.currency === 'SEK' to prevent false matches
- Clone request in skipAuth branch for consistency with auth branch

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

components/dashboard/DashboardNav.tsx

@@ -71,8 +71,6 @@ const navItems: NavItem[] = [
   // Temporarily hidden pending module rework (see feedback #49)
   { href: '/suppliers', label: 'Leverantörer', icon: Building2, group: 'inköp', hidden: true },
   { href: '/supplier-invoices', label: 'Leverantörsfakturor', icon: FileInput, group: 'inköp', hidden: true },
-  // Personal
-  { href: '/salary', label: 'Löner', icon: HandCoins, group: 'redovisning', modes: ['aktiebolag'] },
   // General accounting
   { href: '/pending', label: 'Granskning', icon: ClipboardCheck, group: 'redovisning' },
   { href: '/transactions', label: 'Transaktioner', icon: ArrowLeftRight, group: 'redovisning' },