feat(automations): auto-email invoice on wire-transfer placed and on fulfillment

- New ShopSettings fields: autoEmailOnWireTransferPlaced,
  autoEmailOnFulfilledNonWireTransfer, wireTransferGatewayNames.
- New Automations section in settings with two toggles + gateway list.
- orders/create webhook now fires automation 1 (wire-transfer placed).
- New orders/fulfilled webhook fires automation 2 (non-wire-transfer fulfilled).
- Shared helper services/invoice/automations.server.ts handles classification
  and idempotent generate+send (skips if already sent).
- Webhook subscription for orders/fulfilled added to all 3 app tomls.

This is the non-Plus fallback for Shopify Flow, whose custom-app actions
are gated to Plus stores only.

app/routes/app.settings.tsx

@@ -175,6 +175,9 @@ export const action = async ({ request }: ActionFunctionArgs) => {
     emailBodyHtmlDe: str("emailBodyHtmlDe"),
     emailSubjectEn: str("emailSubjectEn"),
     emailBodyHtmlEn: str("emailBodyHtmlEn"),
+    autoEmailOnWireTransferPlaced: bool("autoEmailOnWireTransferPlaced"),
+    autoEmailOnFulfilledNonWireTransfer: bool("autoEmailOnFulfilledNonWireTransfer"),
+    wireTransferGatewayNames: str("wireTransferGatewayNames"),
   };
 
   await db.shopSettings.upsert({
@@ -412,6 +415,35 @@ export default function SettingsRoute() {
           </s-stack>
         </s-section>
 
+        <s-section heading="Automations">
+          <s-stack direction="block" gap="base">
+            <s-paragraph>
+              These trigger directly from Shopify order webhooks — no Shopify
+              Flow required (Flow is gated to Plus stores for custom apps).
+              When an automation fires, the invoice is generated (if it doesn't
+              already exist) and emailed to the customer using the SMTP and
+              email-template settings above. A copy is recorded in the email
+              log; failures are logged server-side.
+            </s-paragraph>
+            <Toggle
+              label='Auto-email the invoice when a wire-transfer order is placed (so the customer gets the bank details + GiroCode immediately).'
+              name="autoEmailOnWireTransferPlaced"
+              checked={settings.autoEmailOnWireTransferPlaced}
+            />
+            <Toggle
+              label='Auto-email the invoice when an order is fulfilled and is NOT a wire-transfer order (e.g. the customer paid by card and we send the invoice with the shipment).'
+              name="autoEmailOnFulfilledNonWireTransfer"
+              checked={settings.autoEmailOnFulfilledNonWireTransfer}
+            />
+            <Field
+              label="Wire-transfer payment gateway names (comma-separated, case-insensitive substring match)"
+              name="wireTransferGatewayNames"
+              defaultValue={settings.wireTransferGatewayNames}
+              helpText='Used to classify which orders count as "wire transfer". Leave empty to use the default: manual, Überweisung, Wire Transfer, Bank Transfer, Vorkasse, Bank Deposit.'
+            />
+          </s-stack>
+        </s-section>
+
         <s-section>
           <s-stack direction="block" gap="base">
             {actionData?.ok && (