Profile: Rechnungsadresse is always a street address, no Packstation toggle

Matches /checkout's own billing card exactly (an invoice needs a real
postal address) — the profile form previously offered a Lieferart/
Packstation choice for what's actually always used as the billing
address, inconsistent now that a separate "Lieferadresse" section exists.

app/api/account/profile/route.ts

@@ -16,10 +16,7 @@ export async function PATCH(request: Request) {
   const {
     firstName,
     lastName,
-    deliveryMethod,
     street,
-    packstationNumber,
-    postNumber,
     zip,
     city,
     country,
@@ -44,7 +41,8 @@ export async function PATCH(request: Request) {
     !firstName ||
     typeof lastName !== "string" ||
     !lastName ||
-    (deliveryMethod !== "address" && deliveryMethod !== "packstation") ||
+    typeof street !== "string" ||
+    !street ||
     typeof zip !== "string" ||
     !zip ||
     typeof city !== "string" ||
@@ -54,12 +52,6 @@ export async function PATCH(request: Request) {
   ) {
     return NextResponse.json({ ok: false, reason: "Bitte alle Pflichtfelder ausfüllen." }, { status: 400 });
   }
-  if (deliveryMethod === "address" && !street) {
-    return NextResponse.json({ ok: false, reason: "Bitte Straße und Hausnummer angeben." }, { status: 400 });
-  }
-  if (deliveryMethod === "packstation" && (!packstationNumber || !postNumber)) {
-    return NextResponse.json({ ok: false, reason: "Bitte Packstation- und Postnummer angeben." }, { status: 400 });
-  }
   // Both independently optional (see Customers.ts's own comment) — only
   // format-checked when actually provided, same as the backend field itself.
   const normalizedVatId = typeof vatId === "string" && vatId ? normalizeVatId(vatId) : undefined;
@@ -97,10 +89,8 @@ export async function PATCH(request: Request) {
   const result = await updateCustomerProfile(session.token, session.customer.id, {
     firstName,
     lastName,
-    deliveryMethod,
+    deliveryMethod: "address",
     street,
-    packstationNumber,
-    postNumber,
     zip,
     city,
     country,

app/konto/profil/components/ProfileForm.tsx

@@ -34,7 +34,6 @@ export function ProfileForm({
   shippingCountries: ShippingCountry[];
 }) {
   const router = useRouter();
-  const [deliveryMethod, setDeliveryMethod] = useState<"address" | "packstation">(profile.deliveryMethod ?? "address");
   const [hasDifferentShippingAddress, setHasDifferentShippingAddress] = useState(profile.hasDifferentShippingAddress);
   const [shippingDeliveryMethod, setShippingDeliveryMethod] = useState<"address" | "packstation">(
     profile.shippingDeliveryMethod ?? "address",
@@ -53,10 +52,12 @@ export function ProfileForm({
     const body = {
       firstName: String(form.get("firstName") ?? ""),
       lastName: String(form.get("lastName") ?? ""),
-      deliveryMethod,
+      // Always a plain street address — same "Rechnungsadresse is never a
+      // Packstation" rule as /checkout's own billing card (an invoice
+      // needs a real postal address). Packstation is only ever offered
+      // below, in the optional "Lieferadresse" section.
+      deliveryMethod: "address" as const,
       street: String(form.get("street") ?? "") || undefined,
-      packstationNumber: String(form.get("packstationNumber") ?? "") || undefined,
-      postNumber: String(form.get("postNumber") ?? "") || undefined,
       zip: String(form.get("zip") ?? ""),
       city: String(form.get("city") ?? ""),
       country: String(form.get("country") ?? ""),
@@ -136,43 +137,18 @@ export function ProfileForm({
           />
         </div>
 
-        <div className="w-full flex flex-col gap-2 items-start">
-          <span className="text-label text-text-muted">Lieferart</span>
-          <div className="flex w-full max-w-sm rounded-sm border border-border overflow-hidden">
-            <button
-              type="button"
-              onClick={() => setDeliveryMethod("address")}
-              aria-pressed={deliveryMethod === "address"}
-              className={`flex-1 py-3 text-body-sm font-bold transition-colors ${deliveryMethod === "address" ? "bg-brand text-text-primary" : "text-text-muted hover:text-text-primary"}`}
-            >
-              Lieferadresse
-            </button>
-            <button
-              type="button"
-              onClick={() => setDeliveryMethod("packstation")}
-              aria-pressed={deliveryMethod === "packstation"}
-              className={`flex-1 py-3 text-body-sm font-bold border-l border-border transition-colors ${deliveryMethod === "packstation" ? "bg-brand text-text-primary" : "text-text-muted hover:text-text-primary"}`}
-            >
-              Packstation
-            </button>
-          </div>
-        </div>
-
-        {deliveryMethod === "address" ? (
-          <Field
-            label="Straße und Hausnummer"
-            name="street"
-            type="text"
-            defaultValue={profile.street ?? ""}
-            required
-            wrapperClassName="w-full"
-          />
-        ) : (
-          <div className="flex flex-col sm:flex-row gap-4 w-full">
-            <Field label="Packstationnummer" name="packstationNumber" type="text" defaultValue={profile.packstationNumber ?? ""} required />
-            <Field label="Postnummer" name="postNumber" type="text" defaultValue={profile.postNumber ?? ""} required />
-          </div>
-        )}
+        {/* Always a plain street address, no Lieferart/Packstation toggle —
+            matches /checkout's own Rechnungsadresse card exactly (an
+            invoice needs a real postal address). Packstation is only ever
+            offered below, in the optional "Lieferadresse" section. */}
+        <Field
+          label="Straße und Hausnummer"
+          name="street"
+          type="text"
+          defaultValue={profile.street ?? ""}
+          required
+          wrapperClassName="w-full"
+        />
 
         <div className="flex flex-col sm:flex-row gap-4 w-full">
           <Field label="PLZ" name="zip" type="text" defaultValue={profile.zip ?? ""} required />