✓ Business profile (name, ABN, address, email, phone)
✓ Invoice settings (day hours, mileage rate, GST, prefix, terms)
✓ Bank details (bank name, BSB, account number)
✓ Keyboard shortcuts (Ctrl+N, ?, Esc) + help modal
✓ Logout modal with sign-out server action
✓ 8 unit tests passing