(refactor) Move generateShareId to locationActions and apply to LocationCard

- Moved generateShareId from shareChecksum.ts to locationActions.ts as a server action
- Updated LocationCard to use shareID with checksum for proof of payment download link
- Replaced Link with AsyncLink to handle async shareID generation
- Commented out debug console.log in Pdf417Barcode

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

web-app/app/ui/LocationCard.tsx

@@ -1,15 +1,16 @@
 'use client';
 
 import { CheckCircleIcon, Cog8ToothIcon, PlusCircleIcon, ShareIcon, BanknotesIcon, EyeIcon, TicketIcon, ShoppingCartIcon, EnvelopeIcon, ExclamationTriangleIcon, ClockIcon } from "@heroicons/react/24/outline";
-import { FC } from "react";
+import { FC, useEffect, useState } from "react";
 import { BillBadge } from "./BillBadge";
 import { BillingLocation, EmailStatus } from "../lib/db-types";
 import { formatYearMonth } from "../lib/format";
 import { formatCurrency } from "../lib/formatStrings";
 import Link from "next/link";
-import { useLocale, useTranslations } from "next-intl";
+import { useTranslations } from "next-intl";
 import { toast } from "react-toastify";
-import { generateShareLink } from "../lib/actions/locationActions";
+import { generateShareId, generateShareLink } from "../lib/actions/locationActions";
+import { AsyncLink } from "./AsyncLink";
 
 export interface LocationCardProps {
     location: BillingLocation;
@@ -35,6 +36,18 @@ export const LocationCard: FC<LocationCardProps> = ({ location, currency }) => {
     const totalUnpaid = bills.reduce((acc, bill) => !bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0);
     const totalPayed = bills.reduce((acc, bill) => bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0);
 
+    /**
+     * Share ID which can be used in shareable links
+     * Note: not to be used in share button directly since `generateShareLink` sets sharing TTL in the DB
+     * */
+    const [shareID, setShareID] = useState<string>("not-yet-generated");
+
+    useEffect(() => {
+        // share ID can be generated server-side since it requires a secret key
+        // which we don't want to expose to the client
+        (async () => setShareID(await generateShareId(_id)))();
+    }, [_id]);
+
     const handleCopyLinkClick = async () => {
         // copy URL to clipboard
         const shareLink = await generateShareLink(_id);
@@ -124,16 +137,17 @@ export const LocationCard: FC<LocationCardProps> = ({ location, currency }) => {
                                     </div>
                                 )}
                                 {utilBillsProofOfPayment?.uploadedAt && (
-                                    <Link
-                                        href={`/share/proof-of-payment/${_id}/`}
+                                    <AsyncLink
+                                        href={`/share/proof-of-payment/combined/${shareID}`}
                                         target="_blank"
-                                        className="flex mt-1 ml-1">
+                                        className="flex mt-1 ml-1"
+                                        disabled={!shareID} >
                                         <span className="w-5 min-w-5 mr-2"><TicketIcon className="mt-[.1rem]" /></span>
                                         <span>
                                             <span className="underline">{t("download-proof-of-payment-label")}</span>
                                             <CheckCircleIcon className="h-5 w-5 ml-2 mt-[-.2rem] text-success inline-block" />
                                         </span>
-                                    </Link>
+                                    </AsyncLink>
                                 )}
                             </div>
                         </div>