When the chosen features need config the wizard can collect, 'Finish' on
the usage step now advances to a lean config step instead of jumping to
the dashboard:
- Invoicing (if Invoices): company/legal name, address, VAT-ID or tax
number, IBAN, currency → saved to business-profile + a default bank
account. Carries the bank/VAT legal disclaimer.
- Email (if reminders/incoming-mail/whatsapp/invoices): SMTP host/port/
user/pass/from → saved to email_configs.
Each section persists only if started, and 'Skip for now' is always
available — soft settings keep their seeded defaults. en + de strings.
