Give every email a full legal footer (Anbieterkennzeichnung), not just a company line

Order confirmation, resend-verification, and the internal critical-alert
mail now render name, street, ZIP/city, email, and VAT ID from
company-settings instead of a bare "<sellerName> · <sellerEmail>" line,
so every email this app sends meets business-correspondence footer
requirements rather than just the customer-facing ones.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/lib/invoiceData.ts

@@ -5,9 +5,10 @@ import { renderCorrectionInvoicePdf, type CorrectionInvoiceKind, type Correction
 export type { CompanySettings };
 
 // Fetched once by callers that need seller data for more than one purpose
-// in the same request (e.g. orderEmail.ts also needs it for the email
-// footer's companyLine) — avoids a second identical company-settings round
-// trip, unlike calling getCompanySettings() again inside each generator.
+// in the same request (e.g. orderEmail.ts also needs it for the email's
+// legal footer, see buildLegalFooterLines() in emailTemplates.ts) — avoids
+// a second identical company-settings round trip, unlike calling
+// getCompanySettings() again inside each generator.
 export async function getSellerForInvoice(): Promise<CompanySettings | null> {
   return getCompanySettings();
 }