Add legalForm-driven Pflichtangaben (register court/number, managing director)

Mirrors the Payload backend's new company-settings.legalForm field: when
present, registerCourt/registerNumber/managingDirector now appear in the
email footer (buildLegalFooterLines) and both invoice PDF footers,
matching §37a HGB / §35a GmbHG requirements for registered legal forms.
A sole proprietorship (the default) renders identically to before —
these fields are only appended when actually set.

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

app/company-settings-preview/page.tsx

@@ -11,6 +11,10 @@ export const metadata: Metadata = {
 
 const FALLBACK: CompanySettings = {
   sellerName: "",
+  legalForm: "sole-proprietorship",
+  registerCourt: null,
+  registerNumber: null,
+  managingDirector: null,
   sellerStreet: "",
   sellerZip: "",
   sellerCity: "",

app/lib/correctionInvoicePdf.tsx

@@ -121,6 +121,13 @@ export type InvoiceSeller = {
   vatId: string;
   taxRatePercent: number;
   bankDetails?: string | null;
+  // Pflichtangaben in Geschäftsbriefen for registered legal forms (§37a
+  // HGB / §35a GmbHG) — optional because a sole proprietorship (the
+  // default legalForm in company-settings) has neither. Mirrors
+  // invoicePdf.tsx's own InvoiceSeller — see that file's comment.
+  registerCourt?: string | null;
+  registerNumber?: string | null;
+  managingDirector?: string | null;
 };
 
 // Stornorechnung: every item at its full ordered quantity (nothing
@@ -266,6 +273,8 @@ function CorrectionInvoiceDocument({ kind, order, seller }: { kind: CorrectionIn
           <Text>
             {seller.sellerName} · {seller.sellerStreet}, {seller.sellerZip} {seller.sellerCity} · {seller.sellerEmail} · USt-IdNr.{" "}
             {seller.vatId}
+            {seller.registerCourt && seller.registerNumber ? ` · ${seller.registerCourt} · ${seller.registerNumber}` : ""}
+            {seller.managingDirector ? ` · Geschäftsführung: ${seller.managingDirector}` : ""}
           </Text>
           {seller.bankDetails ? <Text style={{ marginTop: 4 }}>Bankverbindung (für Überweisung): {seller.bankDetails}</Text> : null}
         </View>

app/lib/emailTemplates.ts

@@ -80,10 +80,13 @@ export const DEFAULT_LEGAL_FOOTER_LINES: string[] = [
 // plus VAT ID once assigned) — not just a friendly "brand · email" line.
 // Built from the same company-settings fields the invoice PDFs already
 // render (app/lib/invoicePdf.tsx), so there is exactly one source of truth
-// for this business's legal identity. If company-settings ever grows a
-// Handelsregister court/number or Geschäftsführer field (needed once this
-// business is a registered legal form rather than a sole proprietorship),
-// add those lines here too.
+// for this business's legal identity.
+//
+// registerCourt/registerNumber/managingDirector are conditionally required
+// on the Payload side (CompanySettings.ts, gated by legalForm) — only
+// appended here when actually present, so a sole proprietorship's footer
+// stays exactly as short as before this field set existed. Keep this in
+// sync with the Payload backend's own copy in src/lib/sellerInfo.ts.
 export function buildLegalFooterLines(seller: CompanySettings | null): string[] {
   if (!seller) return DEFAULT_LEGAL_FOOTER_LINES;
   const lines = [
@@ -93,6 +96,8 @@ export function buildLegalFooterLines(seller: CompanySettings | null): string[]
     `E-Mail: ${seller.sellerEmail}`,
   ];
   if (seller.vatId) lines.push(`USt-IdNr.: ${seller.vatId}`);
+  if (seller.registerCourt && seller.registerNumber) lines.push(`${seller.registerCourt} · ${seller.registerNumber}`);
+  if (seller.managingDirector) lines.push(`Geschäftsführung: ${seller.managingDirector}`);
   return lines;
 }
 

app/lib/invoicePdf.tsx

@@ -119,6 +119,14 @@ export type InvoiceSeller = {
   vatId: string;
   taxRatePercent: number;
   bankDetails?: string | null;
+  // Pflichtangaben in Geschäftsbriefen for registered legal forms (§37a
+  // HGB / §35a GmbHG) — optional because a sole proprietorship (the
+  // default legalForm in company-settings) has neither. See
+  // buildLegalFooterLines() in emailTemplates.ts for the same fields'
+  // equivalent treatment in the email footer.
+  registerCourt?: string | null;
+  registerNumber?: string | null;
+  managingDirector?: string | null;
 };
 
 // Used only by /company-settings-preview's Live Preview — a fixed sample
@@ -305,6 +313,8 @@ export function InvoiceDocument({ order, seller }: { order: InvoiceOrder; seller
           <Text>
             {seller.sellerName} · {seller.sellerStreet}, {seller.sellerZip} {seller.sellerCity} · {seller.sellerEmail} · USt-IdNr.{" "}
             {seller.vatId}
+            {seller.registerCourt && seller.registerNumber ? ` · ${seller.registerCourt} · ${seller.registerNumber}` : ""}
+            {seller.managingDirector ? ` · Geschäftsführung: ${seller.managingDirector}` : ""}
           </Text>
           {seller.bankDetails ? <Text style={{ marginTop: 4 }}>Bankverbindung (für Überweisung): {seller.bankDetails}</Text> : null}
         </View>

app/lib/payload.ts

@@ -645,6 +645,13 @@ export async function getEmailTemplate(
 
 export type CompanySettings = {
   sellerName: string;
+  // Drives whether registerCourt/registerNumber/managingDirector are
+  // populated — mirrors Payload's CompanySettings.ts collection exactly
+  // (same option values), see buildLegalFooterLines() in emailTemplates.ts.
+  legalForm: "sole-proprietorship" | "e-k" | "gbr" | "ohg" | "kg" | "gmbh" | "ug" | "ag";
+  registerCourt: string | null;
+  registerNumber: string | null;
+  managingDirector: string | null;
   sellerStreet: string;
   sellerZip: string;
   sellerCity: string;