fix(invoice): detect pickup via DeliveryMethodType and show 'Abholort: <location>' meta row

- Use Order.fulfillmentOrders.deliveryMethod.methodType === 'PICK_UP' as the
  primary signal (Shopify Local Pickup app exposes this reliably; the
  shippingLine title is just the location name with no 'pickup' keyword).
  Keep the legacy shippingLine string heuristic as a fallback for custom
  shipping rates merchants name 'Abholung'/'Pickup'.
- Surface assignedLocation.name as pickupLocationName on the view model.
- Replace the 'Versandart: <location name>' row with 'Abholort: <location>'
  (DE) / 'Pick-up location: <location>' (EN); falls back to plain
  'Abholung'/'Pick-up' when the location name is unavailable.

app/services/invoice/loadOrderForInvoice.server.ts

@@ -25,6 +25,11 @@ export interface RawOrderForInvoice {
   taxLines: RawTaxLine[];
   shippingLine: RawShippingLine | null;
   fulfillments: RawFulfillment[];
+  /** Delivery methods declared on the order's fulfillment orders. Used to
+   *  reliably detect local pickup (`methodType === "PICK_UP"`) and to
+   *  surface the pickup-location name. May be empty for unfulfilled or
+   *  digital orders. */
+  deliveryMethods: RawDeliveryMethod[];
   /** Discount codes applied to the cart (e.g. `["SUMMER10"]`). Empty when
    *  no codes were used. Manual / automatic discounts without a code are
    *  not exposed here. */
@@ -102,6 +107,17 @@ export interface RawFulfillment {
   trackingInfo: RawTrackingInfo[];
 }
 
+/** Subset of Shopify's `DeliveryMethod` we care about. `methodType` is one
+ *  of the enum values from `DeliveryMethodType` — e.g. `SHIPPING`,
+ *  `PICK_UP`, `LOCAL`, `RETAIL`, `PICKUP_POINT`, `NONE`. */
+export interface RawDeliveryMethod {
+  methodType: string | null;
+  /** Name of the location the customer chose to pick up from (when
+   *  `methodType === "PICK_UP"`). Comes from the assigned location of the
+   *  fulfillment order. */
+  locationName: string | null;
+}
+
 const QUERY = `#graphql
   query OrderForInvoice($id: ID!) {
     order(id: $id) {
@@ -173,6 +189,18 @@ const QUERY = `#graphql
           company
         }
       }
+      fulfillmentOrders(first: 20) {
+        edges {
+          node {
+            deliveryMethod {
+              methodType
+            }
+            assignedLocation {
+              name
+            }
+          }
+        }
+      }
       lineItems(first: 250) {
         edges {
           node {
@@ -240,6 +268,14 @@ interface RawAdminResponse {
       discountCodes: string[] | null;
       shippingLine: RawShippingLine | null;
       fulfillments: RawFulfillment[] | null;
+      fulfillmentOrders: {
+        edges: {
+          node: {
+            deliveryMethod: { methodType: string | null } | null;
+            assignedLocation: { name: string | null } | null;
+          };
+        }[];
+      } | null;
       lineItems: { edges: { node: RawLineItem }[] };
       purchasingEntity: {
         company?: { name: string } | null;
@@ -293,6 +329,10 @@ export async function loadOrderForInvoice(
       : (order.discountCode ? [order.discountCode] : []),
     shippingLine: order.shippingLine ?? null,
     fulfillments: order.fulfillments ?? [],
+    deliveryMethods: (order.fulfillmentOrders?.edges ?? []).map((e) => ({
+      methodType: e.node.deliveryMethod?.methodType ?? null,
+      locationName: e.node.assignedLocation?.name ?? null,
+    })),
     lineItems: (order.lineItems?.edges || []).map((e) => {
       const node = e.node as unknown as RawLineItem & { image?: { url: string | null } | null };
       return {